[.Net] C# Excel操作类 ExcelHelper

实现C#与Excel文件的交互操作,实现以下功能:

1、DataTable 导出到 Excel文件

2、Model数据实体导出到 Excel文件[List<Model>]

3、导出数据到模版

4、多DataTable导入到同一Excel文件

对于第四项功能,常见的用途为:最后一行显示的是百分比,为字符型,而这列其它类型为数据型,如果放在同一个DataTable中,显然不合适。此操作类可实现

5、将Excel文件导入到数据库表中

可以指定每个字段的数据类型

此帮助类的代码量不算少,但注释比较详细,导出数据集中在一个方法,导入数据集中在一个方法。只看完整的两个方法就可以了,其它方法为便于使用所写的辅助简化方法,看看就清楚了:

using System;
using System.Collections.Generic;
using System.Text;
using System.Configuration;
using Microsoft.Office.Interop.Excel;
using System.Data;
using System.Reflection;
using System.Data.OleDb;
 
namespace SOSP.Common
{
    /// <summary>
    /// C#与Excel交互类
    /// </summary>
    public class ExcelHelper
    {
        #region 导出到Excel
        #region ExportExcelForDataTable
        /// <summary>
        /// 从DataTable导出Excel,指定列别名,指定要排除的列
        /// </summary>
        /// <param name="dt">DataTable</param>
        /// <param name="excelPathName">含Excel名称的保存路径 在pathType=1时有效,其它请赋值空字符串</param>
        /// <param name="pathType">路径类型。只能取值:0客户自定义路径;1服务端定义路径,标识文件保存路径是服务端指定还是客户自定义路径及文件名</param>
        /// <param name="colName">各列的列名List string </param>
        /// <param name="excludeColumn">要显示/排除的列</param>
        /// <param name="excludeType">显示/排除列方式 0为所有列 1指定的为要显示的列 2指定的为要排除的列</param>
        /// <param name="sheetName">sheet1的名称 为空字符串时保持默认名称</param>
        /// <param name="TemplatePath">模版在项目服务器中路径 例:tp.xlsx 为空字符串时表示无模版</param>
        /// <param name="TemplateRow">模版中已存在数据的行数,无模版时请传入参数 0</param>
        /// <param name="exDataTableList">扩展 DataTable List 用于当上下两个及以上DataTable数据类型不一至,但又都在同一列时使用,要求格式与参数第一个 DataTable的列名字段名一至,仅字段类型可不同</param>
        /// <returns>bool</returns>
        public static bool ToExcelForDataTable(System.Data.DataTable dt, string excelPathName, string pathType, List<string> colName, List<string> excludeColumn, string excludeType, string sheetName, string TemplatePath, int TemplateRow, List<System.Data.DataTable> exDataTableList)
        {
            try
            {
                if (dt == null || dt.Rows.Count == 0) return false;
                Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();
                if (xlApp == null)
                {
                    return false;
                }
                System.Globalization.CultureInfo CurrentCI = System.Threading.Thread.CurrentThread.CurrentCulture;
                System.Threading.Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo("en-US");
                Microsoft.Office.Interop.Excel.Workbooks workbooks = xlApp.Workbooks;
 
                Microsoft.Office.Interop.Excel.Workbook workbook = null;
                if (TemplatePath == "")
                {
                    workbook = workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);
                }
                else
                {
                    workbook = workbooks.Add(TemplatePath); //加载模板
                }
                Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1];
                Microsoft.Office.Interop.Excel.Range range;
 
                long totalCount = dt.Rows.Count;
                if (exDataTableList != null && exDataTableList.Count > 0)
                {
                    foreach (System.Data.DataTable item in exDataTableList)
                    {
                        totalCount += item.Rows.Count;
                    }
                }
                long rowRead = 0;
                float percent = 0;
                string exclStr = "";//要排除的列临时项
                object exclType;//DataTable 列的类型,用于做
                int colPosition = 0;//列位置
                if (sheetName != null && sheetName != "")
                {
                    worksheet.Name = sheetName;
                }
                #region 列别名判定
                if (TemplatePath == "")
                {
                    if (colName != null && colName.Count > 0)
                    {
                        #region 指定了列别名
                        for (int i = 0; i < colName.Count; i++)
                        {
                            worksheet.Cells[1, i + 1] = colName[i];
                            range = (Microsoft.Office.Interop.Excel.Range)worksheet.Cells[1, i + 1];
                            range.Interior.ColorIndex = 15;
                            range.Font.Bold = true;
                            exclType = dt.Columns[i].DataType.Name;
                            if (exclType.ToString() != "DateTime")
                            {
                                //range.EntireColumn.AutoFit();//全局自动调整列宽,不能再使用单独设置
                                ((Microsoft.Office.Interop.Excel.Range)worksheet.Cells[1, i + 1]).Columns.AutoFit();
                            }
                            else
                            {
                                //规定列宽
                                ((Microsoft.Office.Interop.Excel.Range)worksheet.Cells[1, i + 1]).Columns.ColumnWidth = 20;
                            }
                            //((Microsoft.Office.Interop.Excel.Range)worksheet.Cells[1, i + 1]).Columns.ColumnWidth = 20;
                        }
                        #endregion
                    }
                    else
                    {
                        #region 未指定别名
                        for (int i = 0; i < dt.Columns.Count; i++)
                        {
                            worksheet.Cells[1, i + 1] = dt.Columns[i].ColumnName;
                            range = (Microsoft.Office.Interop.Excel.Range)worksheet.Cells[1, i + 1];
                            range.Interior.ColorIndex = 15;
                            range.Font.Bold = true;
                            exclType = dt.Columns[i].DataType.Name;
                            if (exclType.ToString() != "DateTime")
                            {
                                //range.EntireColumn.AutoFit();//全局自动调整列宽,不能再使用单独设置
                                ((Microsoft.Office.Interop.Excel.Range)worksheet.Cells[1, i + 1]).Columns.AutoFit();
                            }
                            else
                            {
                                //规定列宽
                                ((Microsoft.Office.Interop.Excel.Range)worksheet.Cells[1, i + 1]).Columns.ColumnWidth = 20;
                            }
                            //((Microsoft.Office.Interop.Excel.Range)worksheet.Cells[1, i + 1]).Columns.ColumnWidth = 20;
                        }
                        #endregion
                    }
                }
                else
                {
                    //用了模版,不加载标题
                }
                #endregion
                #region 显示/排除列判定
                if (excludeColumn != null && excludeColumn.Count > 0)
                {
                    switch (excludeType)
                    {
                        case "0":
                            {
                                #region 0为显示所有列
                                #region 常规项
                                int r = 0;
                                for (r = 0; r < dt.Rows.Count; r++)
                                {
                                    colPosition = 0;
                                    for (int i = 0; i < dt.Columns.Count; i++)
                                    {
                                        if (TemplatePath == "")
                                        {
                                            worksheet.Cells[r + 2, colPosition + 1] = dt.Rows[r][i].ToString();
                                        }
                                        else
                                        {
                                            worksheet.Cells[r + TemplateRow, colPosition + 1] = dt.Rows[r][i].ToString();
                                        }
                                        colPosition++;
                                    }
                                    rowRead++;
                                    percent = ((float)(100 * rowRead)) / totalCount;
                                }
                                #endregion
                                #region 扩展项
                                if (exDataTableList != null && exDataTableList.Count > 0)
                                {
                                    foreach (System.Data.DataTable item in exDataTableList)
                                    {
                                        for (int k = 0; k < item.Rows.Count; r++, k++)
                                        {
                                            colPosition = 0;
                                            //生成扩展 DataTable 每行数据
                                            for (int t = 0; t < item.Columns.Count; t++)
                                            {
                                                if (TemplatePath == "")
                                                {
                                                    worksheet.Cells[r + 2, colPosition + 1] = item.Rows[k][t].ToString();
                                                }
                                                else
                                                {
                                                    worksheet.Cells[r + TemplateRow, colPosition + 1] = item.Rows[k][t].ToString();
                                                }
                                                colPosition++;
                                            }
                                            rowRead++;
                                            percent = ((float)(100 * rowRead)) / totalCount;
                                        }
                                    }
                                }
                                #endregion
                                #endregion
                            }; break;
                        case "1":
                            {
                                #region 1指定的为要显示的列
                                #region 常规项
                                int r = 0;
                                for (r = 0; r < dt.Rows.Count; r++)
                                {
                                    colPosition = 0;
                                    for (int i = 0; i < dt.Columns.Count; i++)
                                    {
                                        exclStr = dt.Columns[i].ColumnName;
                                        if (excludeColumn.Contains(exclStr))
                                        {
                                            if (TemplatePath == "")
                                            {
                                                worksheet.Cells[r + 2, colPosition + 1] = dt.Rows[r][i].ToString();
                                            }
                                            else
                                            {
                                                worksheet.Cells[r + TemplateRow, colPosition + 1] = dt.Rows[r][i].ToString();
                                            }
                                            colPosition++;
                                        }
                                        else
                                        {
 
                                        }
                                    }
                                    rowRead++;
                                    percent = ((float)(100 * rowRead)) / totalCount;
                                }
                                #endregion
                                #region 扩展项
                                if (exDataTableList != null && exDataTableList.Count > 0)
                                {
                                    foreach (System.Data.DataTable item in exDataTableList)
                                    {
                                        for (int k = 0; k < item.Rows.Count; r++, k++)
                                        {
                                            colPosition = 0;
                                            //生成扩展 DataTable 每行数据
                                            for (int t = 0; t < item.Columns.Count; t++)
                                            {
                                                exclStr = dt.Columns[t].ColumnName;
                                                if (excludeColumn.Contains(exclStr))
                                                {
                                                    if (TemplatePath == "")
                                                    {
                                                        worksheet.Cells[r + 2, colPosition + 1] = item.Rows[k][t].ToString();
                                                    }
                                                    else
                                                    {
                                                        worksheet.Cells[r + TemplateRow, colPosition + 1] = item.Rows[k][t].ToString();
                                                    }
                                                    colPosition++;
                                                }
                                                else
                                                {
 
                                                }
                                            }
                                            rowRead++;
                                            percent = ((float)(100 * rowRead)) / totalCount;
                                        }
                                    }
                                }
                                #endregion
                                #endregion
                            }; break;
                        case "2":
                            {
                                #region 2指定的为要排除的列
                                #region 常规项
                                int r = 0;
                                for (r = 0; r < dt.Rows.Count; r++)
                                {
                                    colPosition = 0;
                                    for (int i = 0; i < dt.Columns.Count; i++)
                                    {
                                        exclStr = dt.Columns[i].ColumnName;
                                        if (excludeColumn.Contains(exclStr))
                                        {
 
                                        }
                                        else
                                        {
                                            if (TemplatePath == "")
                                            {
                                                worksheet.Cells[r + 2, colPosition + 1] = dt.Rows[r][i].ToString();
                                            }
                                            else
                                            {
                                                worksheet.Cells[r + TemplateRow, colPosition + 1] = dt.Rows[r][i].ToString();
                                            }
                                            colPosition++;
                                        }
                                    }
                                    rowRead++;
                                    percent = ((float)(100 * rowRead)) / totalCount;
                                }
                                #endregion
                                #region 扩展项
                                if (exDataTableList != null && exDataTableList.Count > 0)
                                {
                                    foreach (System.Data.DataTable item in exDataTableList)
                                    {
                                        for (int k = 0; k < item.Rows.Count; r++, k++)
                                        {
                                            colPosition = 0;
                                            //生成扩展 DataTable 每行数据
                                            for (int t = 0; t < item.Columns.Count; t++)
                                            {
                                                exclStr = dt.Columns[t].ColumnName;
                                                if (excludeColumn.Contains(exclStr))
                                                {
 
                                                }
                                                else
                                                {
                                                    if (TemplatePath == "")
                                                    {
                                                        worksheet.Cells[r + 2, colPosition + 1] = item.Rows[k][t].ToString();
                                                    }
                                                    else
                                                    {
                                                        worksheet.Cells[r + TemplateRow, colPosition + 1] = item.Rows[k][t].ToString();
                                                    }
                                                    colPosition++;
                                                }
                                            }
                                            rowRead++;
                                            percent = ((float)(100 * rowRead)) / totalCount;
                                        }
                                    }
                                }
                                #endregion
                                #endregion
                            }; break;
                        default:
                            break;
                    }
 
                }
                else
                {
                    //生成每行数据
                    int r = 0;
                    for (r = 0; r < dt.Rows.Count; r++)
                    {
                        //生成每列数据
                        if (TemplatePath == "")
                        {
                            for (int i = 0; i < dt.Columns.Count; i++)
                            {
                                worksheet.Cells[r + 2, i + 1] = dt.Rows[r][i].ToString();
                            }
                        }
                        else
                        {
                            for (int i = 0; i < dt.Columns.Count; i++)
                            {
                                worksheet.Cells[r + 1 + TemplateRow, i + 1] = dt.Rows[r][i].ToString();
                            }
                        }
                        rowRead++;
                        percent = ((float)(100 * rowRead)) / totalCount;
                    }
                }
                #endregion
                switch (pathType)
                {
                    case "0": { workbook.Saved = false; }; break;
                    case "1": { workbook.Saved = true; workbook.SaveCopyAs(excelPathName); }; break;
                    default:
                        return false;
                }
                xlApp.Visible = false;//是否在服务器打开
                workbook.Close(true, Type.Missing, Type.Missing);
                workbook = null;
                xlApp.Quit();
                xlApp = null;
                return true;
            }
            catch (Exception)
            {
                return false;
            }
        }
 
        /// <summary>
        /// 从DataTable导出Excel,指定列别名
        /// </summary>
        /// <param name="dt">DataTable</param>
        /// <param name="excelPathName">含Excel名称的保存路径 在pathType=1时有效,其它请赋值空字符串</param>
        /// <param name="pathType">路径类型。只能取值:0客户自定义路径;1服务端定义路径,标识文件保存路径是服务端指定还是客户自定义路径及文件名</param>
        /// <param name="colName">各列的列名List string </param>
        /// <param name="sheetName">sheet1的名称 为空字符串时保持默认名称</param>
        /// <param name="TemplatePath">模版在项目服务器中路径 为空字符串时表示无模版</param>
        /// <param name="TemplateRow">模版中已存在数据的行数,无模版时请传入参数 0</param>
        /// <param name="exDataTableList">扩展 DataTable List 用于当上下两个及以上DataTable数据类型不一至,但又都在同一列时使用,要求格式与参数第一个 DataTable的列名字段名一至,仅字段类型可不同</param>
        /// <returns>bool</returns>
        public static bool ToExcelForDataTableC(System.Data.DataTable dt, string excelPathName, string pathType, List<string> colName, string sheetName, string TemplatePath, int TemplateRow, List<System.Data.DataTable> exDataTableList)
        {
            List<string> excludeColumn = new List<string>();
            string excludeType = "0";
            return ToExcelForDataTable(dt, excelPathName, pathType, colName, excludeColumn, excludeType, sheetName, TemplatePath, TemplateRow, exDataTableList);
        }
 
        /// <summary>
        /// 从DataTable导出Excel,指定要排除的列
        /// </summary>
        /// <param name="dt">DataTable</param>
        /// <param name="excelPathName">含Excel名称的保存路径 在pathType=1时有效,其它请赋值空字符串</param>
        /// <param name="pathType">路径类型。只能取值:0客户自定义路径;1服务端定义路径,标识文件保存路径是服务端指定还是客户自定义路径及文件名</param>
        /// <param name="excludeColumn">要显示/排除的列</param>
        /// <param name="excludeType">显示/排除列方式 0为所有列 1指定的为要显示的列 2指定的为要排除的列</param>
        /// <param name="sheetName">sheet1的名称 为空字符串时保持默认名称</param>
        /// <param name="TemplatePath">模版在项目服务器中路径 为空字符串时表示无模版</param>
        /// <param name="TemplateRow">模版中已存在数据的行数,无模版时请传入参数 0</param>
        /// <param name="exDataTableList">扩展 DataTable List 用于当上下两个及以上DataTable数据类型不一至,但又都在同一列时使用,要求格式与参数第一个 DataTable的列名字段名一至,仅字段类型可不同</param>
        /// <returns>bool</returns>
        public static bool ToExcelForDataTableE(System.Data.DataTable dt, string excelPathName, string pathType, List<string> excludeColumn, string excludeType, string sheetName, string TemplatePath, int TemplateRow, List<System.Data.DataTable> exDataTableList)
        {
            List<string> colName = new List<string>();
            return ToExcelForDataTable(dt, excelPathName, pathType, colName, excludeColumn, excludeType, sheetName, TemplatePath, TemplateRow, exDataTableList);
        }
        /// <summary>
        /// 从DataTable导出Excel,使用默认列名,不排除导出任何列
        /// </summary>
        /// <param name="dt">DataTable</param>
        /// <param name="excelPathName">含Excel名称的保存路径 在pathType=1时有效,其它请赋值空字符串</param>
        /// <param name="pathType">路径类型。只能取值:0客户自定义路径;1服务端定义路径,标识文件保存路径是服务端指定还是客户自定义路径及文件名</param>
        /// <param name="sheetName">sheet1的名称 为空字符串时保持默认名称</param>
        /// <param name="TemplatePath">模版在项目服务器中路径 为空字符串时表示无模版</param>
        /// <param name="TemplateRow">模版中已存在数据的行数,无模版时请传入参数 0</param>
        /// <param name="exDataTableList">扩展 DataTable List 用于当上下两个及以上DataTable数据类型不一至,但又都在同一列时使用,要求格式与参数第一个 DataTable的列名字段名一至,仅字段类型可不同</param>
        /// <returns>bool</returns>
        public static bool ToExcelForDataTableZ(System.Data.DataTable dt, string excelPathName, string pathType, string sheetName, string TemplatePath, int TemplateRow, List<System.Data.DataTable> exDataTableList)
        {
            List<string> colName = new List<string>();
            List<string> excludeColumn = new List<string>();
            string excludeType = "0";
            return ToExcelForDataTable(dt, excelPathName, pathType, colName, excludeColumn, excludeType, sheetName, TemplatePath, TemplateRow, exDataTableList);
        }
        #endregion
 
        #region ExportExcelForModelList
        /// <summary>
        /// 从DataTable导出Excel,指定列别名,指定要排除的列
        /// </summary>
        /// <param name="dt">DataTable</param>
        /// <param name="excelPathName">含Excel名称的保存路径 在pathType=1时有效,其它请赋值空字符串</param>
        /// <param name="pathType">路径类型。只能取值:0客户自定义路径;1服务端定义路径,标识文件保存路径是服务端指定还是客户自定义路径及文件名</param>
        /// <param name="colName">各列的列名List string </param>
        /// <<param name="excludeColumn">要显示/排除的列</param>
        /// <param name="excludeType">显示/排除列方式 0为所有列 1指定的为要显示的列 2指定的为要排除的列</param>
        /// <param name="sheetName">sheet1的名称 为空字符串时保持默认名称</param>
        /// <param name="TemplatePath">模版在项目服务器中路径 为空字符串时表示无模版</param>
        /// <param name="TemplateRow">模版中已存在数据的行数,无模版时请传入参数 0</param>
        /// <param name="exDataTableList">扩展 DataTable List 用于当上下两个及以上DataTable数据类型不一至,但又都在同一列时使用,要求格式与参数第一个 DataTable的列名字段名一至,仅字段类型可不同</param>
        /// <returns>bool</returns>
        public static bool ToExcelForModelList<T>(List<T> md, string excelPathName, string pathType, List<string> colName, List<string> excludeColumn, string excludeType, string sheetName, string TemplatePath, int TemplateRow, List<System.Data.DataTable> exDataTableList)
        {
            System.Data.DataTable dt = ModelListToDataTable(md);
            return ToExcelForDataTable(dt, excelPathName, pathType, colName, excludeColumn, excludeType, sheetName, TemplatePath, TemplateRow, exDataTableList);
        }
 
        /// <summary>
        /// 从DataTable导出Excel,指定列别名
        /// </summary>
        /// <param name="dt">DataTable</param>
        /// <param name="excelPathName">含Excel名称的保存路径 在pathType=1时有效,其它请赋值空字符串</param>
        /// <param name="pathType">路径类型。只能取值:0客户自定义路径;1服务端定义路径,标识文件保存路径是服务端指定还是客户自定义路径及文件名</param>
        /// <param name="colName">各列的列名List string </param>
        /// <param name="sheetName">sheet1的名称 为空字符串时保持默认名称</param>
        /// <param name="TemplatePath">模版在项目服务器中路径 为空字符串时表示无模版</param>
        /// <param name="TemplateRow">模版中已存在数据的行数,无模版时请传入参数 0</param>
        /// <param name="exDataTableList">扩展 DataTable List 用于当上下两个及以上DataTable数据类型不一至,但又都在同一列时使用,要求格式与参数第一个 DataTable的列名字段名一至,仅字段类型可不同</param>
        /// <returns>bool</returns>
        public static bool ToExcelForModelListC<T>(List<T> md, string excelPathName, string pathType, List<string> colName, string sheetName, string TemplatePath, int TemplateRow, List<System.Data.DataTable> exDataTableList)
        {
            List<string> excludeColumn = new List<string>();
            string excludeType = "0";
            return ToExcelForModelList(md, excelPathName, pathType, colName, excludeColumn, excludeType, sheetName, TemplatePath, TemplateRow, exDataTableList);
        }
 
        /// <summary>
        /// 从DataTable导出Excel,指定要排除的列
        /// </summary>
        /// <param name="dt">DataTable</param>
        /// <param name="excelPathName">含Excel名称的保存路径 在pathType=1时有效,其它请赋值空字符串</param>
        /// <param name="pathType">路径类型。只能取值:0客户自定义路径;1服务端定义路径,标识文件保存路径是服务端指定还是客户自定义路径及文件名</param>
        /// <param name="excludeColumn">要显示/排除的列</param>
        /// <param name="excludeType">显示/排除列方式 0为所有列 1指定的为要显示的列 2指定的为要排除的列</param>
        /// <param name="sheetName">sheet1的名称 为空字符串时保持默认名称</param>
        /// <param name="TemplatePath">模版在项目服务器中路径 为空字符串时表示无模版</param>
        /// <param name="TemplateRow">模版中已存在数据的行数,无模版时请传入参数 0</param>
        /// <param name="exDataTableList">扩展 DataTable List 用于当上下两个及以上DataTable数据类型不一至,但又都在同一列时使用,要求格式与参数第一个 DataTable的列名字段名一至,仅字段类型可不同</param>
        /// <returns>bool</returns>
        public static bool ToExcelForModelListE<T>(List<T> md, string excelPathName, string pathType, List<string> excludeColumn, string excludeType, string sheetName, string TemplatePath, int TemplateRow, List<System.Data.DataTable> exDataTableList)
        {
            List<string> colName = new List<string>();
            return ToExcelForModelList(md, excelPathName, pathType, colName, excludeColumn, excludeType, sheetName, TemplatePath, TemplateRow, exDataTableList);
        }
 
        /// <summary>
        /// 从DataTable导出Excel,使用默认列名,不排除导出任何列
        /// </summary>
        /// <param name="dt">DataTable</param>
        /// <param name="excelPathName">含Excel名称的保存路径 在pathType=1时有效,其它请赋值空字符串</param>
        /// <param name="pathType">路径类型。只能取值:0客户自定义路径;1服务端定义路径,标识文件保存路径是服务端指定还是客户自定义路径及文件名</param>
        /// <param name="sheetName">sheet1的名称 为空字符串时保持默认名称</param>
        /// <param name="TemplatePath">模版在项目服务器中路径 为空字符串时表示无模版</param>
        /// <param name="TemplateRow">模版中已存在数据的行数,无模版时请传入参数 0</param>
        /// <param name="exDataTableList">扩展 DataTable List 用于当上下两个及以上DataTable数据类型不一至,但又都在同一列时使用,要求格式与参数第一个 DataTable的列名字段名一至,仅字段类型可不同</param>
        /// <returns>bool</returns>
        public static bool ToExcelForModelListZ<T>(List<T> md, string excelPathName, string pathType, string sheetName, string TemplatePath, int TemplateRow, List<System.Data.DataTable> exDataTableList)
        {
            List<string> colName = new List<string>();
            List<string> excludeColumn = new List<string>();
            string excludeType = "0";
            return ToExcelForModelList(md, excelPathName, pathType, colName, excludeColumn, excludeType, sheetName, TemplatePath, TemplateRow, exDataTableList);
        }
        #endregion
 
        #region 从DataTable导出Excel; ToExcelModel实体传参
        /// <summary>
        /// 从DataTable导出Excel; ToExcelModel实体传参
        /// </summary>
        /// <param name="tem">ExcelHelper.ToExcelModel</param>
        /// <returns></returns>
        public static bool ToExcelForDataTable(ToExcelModel tem)
        {
            if (tem != null)
            {
                return ToExcelForDataTable(tem.DataTable, tem.excelPathName, tem.pathType, tem.colNameList, tem.excludeColumn, tem.excludeType, tem.sheetName, tem.TemplatePath, tem.TemplateRow, tem.exDataTableList);
            }
            else
            {
                return false;
            }
        }
        #endregion
 
        #region Model To DataTable
        /// <summary>
        /// 实体类转换成DataTable
        /// </summary>
        /// <param name="modelList">实体类列表</param>
        /// <returns></returns>
        public static System.Data.DataTable ModelListToDataTable<T>(List<T> modelList)
        {
            System.Data.DataTable dtReturn = new System.Data.DataTable();
 
            // column names
            PropertyInfo[] oProps = null;
 
            if (modelList == null) return dtReturn;
 
            foreach (T rec in modelList)
            {
                if (oProps == null)
                {
                    oProps = ((Type)rec.GetType()).GetProperties();
                    foreach (PropertyInfo pi in oProps)
                    {
                        Type colType = pi.PropertyType;
 
                        if ((colType.IsGenericType) && (colType.GetGenericTypeDefinition()
                        == typeof(Nullable<>)))
                        {
                            colType = colType.GetGenericArguments()[0];
                        }
 
                        dtReturn.Columns.Add(new DataColumn(pi.Name, colType));
                    }
                }
 
                DataRow dr = dtReturn.NewRow();
 
                foreach (PropertyInfo pi in oProps)
                {
                    dr[pi.Name] = pi.GetValue(rec, null) == null ? DBNull.Value : pi.GetValue
                    (rec, null);
                }
 
                dtReturn.Rows.Add(dr);
            }
            return dtReturn;
        }
        #endregion
 
        #region 说明 如何使用
        /*
         * 功能:
         *      1、将System.Data.DataTable数据导出到Excel文件
         *      2、将Model(Entity)数据实体导出到Excel文件
         * 完整调用:
         *      1、ExcelHelper.ToExcelForDataTable(DataTable,excelPathName,pathType,colName,excludeColumn,excludeType,sheetName,TemplatePath,TemplateRow,exDataTableList);
         *      2、ExcelHelper.ToExcelForModelList(Model,excelPathName,pathType,colName,excludeColumn,excludeType,sheetName,TemplatePath,TemplateRow,exDataTableList);
         * 参数说明:
         *      1、DataTable:DataSet.DataTable[0];数据表
         *      2、Model:Model.Users users = new Model.Users(){...};数据实体
         *      3、excelPathName:含Excel名称的保存路径 在pathType=1时有效。用户自定义保存路径时请赋值空字符串 ""。格式:"E://456.xlsx"
         *      4、pathType:路径类型。只能取值:0用户自定义路径,弹出用户选择路径对话框;1服务端定义路径。标识文件保存路径是服务端指定还是客户自定义路径及文件名,与excelPathName参数合用
         *      5、colName:各列的列别名List string,比如:字段名为userName,此处可指定为"用户名",并以此显示
         *      6、excludeColumn:要显示/排除的列,指定这些列用于显示,或指定这些列用于不显示。倒低这些列是显示还是不显示,由excludeType参数决定
         *      7、excludeType:显示/排除列方式。 0为显示所有列 1指定的是要显示的列 2指定的是要排除的列,与excludeColumn合用
         *      8、sheetName:sheet1的名称,要使期保持默认名称请指定为空字符串 ""
         *      9、TemplatePath:模版在项目服务器中路径 例:tp.xlsx 。当为空字符串 "" 时表示无模版
         *      10、TemplateRow:模版中已存在数据的行数,与TemplatePath合用,无模版时请传入参数 0
         *      11、exDataTableList:扩展 DataTable List 用于当上下两个及以上DataTable数据类型不一至,但又

调用示例:

导出---

/// <summary>
        /// 导出至Excel
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void Button1_Click(object sender, EventArgs e)
        {
            try
            {
                BLL.COMMON_UserInfo cu = new BLL.COMMON_UserInfo();
                List<Model.COMMON_UserInfo> cuiList = cu.GetModelList("");
                BLL.manager_log bll = new BLL.manager_log();
                DataSet ds = bll.GetList(10, "", "id");
                System.Data.DataTable dt = ds.Tables[0];
                List<string> colName = new List<string>() { 
                "用户ID",
                "用户名",
                "备注",
                "用户IP",
                "操作时间",
                "操作时间1",
                "操作时间2"
                };
                List<string> tt = new List<string>() { "action_type" };
                DataSet dss = bll.GetList(10, "", "id");
                List<System.Data.DataTable> dtss = new List<System.Data.DataTable>();
                dtss.Add(dss.Tables[0]);
                dtss.Add(dss.Tables[0]);
                dtss.Add(dss.Tables[0]);
                ExcelHelper.ToExcelForDataTable(dt, Server.MapPath("~").ToString() + "456.xlsx", "0", colName, tt, "2", "", "", 0, dtss);//指定了列别名,指定了要排除的列
                ToExcelModel tem = new ToExcelModel()
                {
                    DataTable = dt,
                    excelPathName = "",
                    pathType = "0",
                    colNameList = colName,
                    excludeColumn = tt,
                    excludeType = "0",
                    sheetName = "成功",
                    TemplatePath = "",
                    TemplateRow = 0,
                    exDataTableList = dtss
                };
                ExcelHelper.ToExcelForDataTable(tem);
            }
            catch (Exception ex)
            {
                FileLog.Log(ex.Message, "ExportExcelByDataTable");
            }
        }

导入---

/// <summary>
        /// 导入数据到数据库
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void Button2_Click(object sender, EventArgs e)
        {
            string excelFile = "G://123.xls";
            string sheetName = "Sheet1";
            string DbTableName = "test_new_table";// "test_new_table";
            List<string> columnType = new List<string>() { 
                "int",
                "nvarchar(100)",
                "decimal(18,2)",
                "nvarchar(100)",
                "datetime"
            };
            string connectionString = "server=.;database=Test1;uid=sa;pwd=zhangquan;";
            ExcelHelper.FromExcel(excelFile, sheetName, DbTableName, columnType, connectionString);
        }

[.Net] C# Excel操作类 ExcelHelper

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