C# 读取EXCEL 数据到DataGridView

1、要安装或引用DLL;“Microsoft.Office.Interop.Excel.dll”,复制到bin/debug目录下;

2 、在项目解决方案上引用;

C# 读取EXCEL 数据到DataGridView

 

 网上搜到的函数 ,我建 了个通用类Excel ;

using System;
using System.Collections.Generic;
using System.Data;
using System.Data.OleDb;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

 public  class Excel
    {

        public static DataTable ReadFromExcel(string excelpath)
        {
            string sExt = System.IO.Path.GetExtension(excelpath);
            string sConn = null;
            if (sExt == ".xlsx")
            {
                sConn = "Provider=Microsoft.ACE.OLEDB.12.0;" + "Data Source=" + excelpath + ";" + "Extended Properties='Excel 12.0;HDR=YES'";
            }
            else if (sExt == ".xls")
            {
                sConn = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + excelpath + ";" + "Extended Properties=Excel 8.0";
            }
            else
            {
                throw new Exception("文件格式有误");
            }
            OleDbConnection oledbConn = new OleDbConnection(sConn);
            oledbConn.Open();
            ///

            //返回Excel的架构,包括各个sheet表的名称,类型,创建时间和修改时间等 
            DataTable dtSheetName = oledbConn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "Table" });
            //包含excel中表名的字符串数组
            string[] strTableNames = new string[dtSheetName.Rows.Count];
            for (int k = 0; k < dtSheetName.Rows.Count; k++)
            {
                strTableNames[k] = dtSheetName.Rows[k]["TABLE_NAME"].ToString();
            }
            OleDbDataAdapter command = new OleDbDataAdapter("SELECT * FROM [" + strTableNames[0] + "]", oledbConn);
            DataSet ds = new DataSet();
            command.Fill(ds);
            oledbConn.Close();
            return ds.Tables[0];
        }
}

调用方法,引用 Excel.ReadFromExcel(excelpath);:

         OpenFileDialog ofd = new OpenFileDialog();
            if (ofd.ShowDialog() == DialogResult.OK)
            {
                string excelpath = ofd.FileName;
                dataGridView1.DataSource = Excel.ReadFromExcel(excelpath);
            }

 

 

参考1:解决 |Sheet1 名称出错问题

(53条消息) 'Sheet1$' 不是一个有效名称的解决方法_心如止水-CSDN博客_不是一个有效名称

参考2:

(53条消息) C#读取Excel到DataGridView(两种方式)_CSDNwhyu的博客-CSDN博客_c# datagridview excel

我试了参考2的两种方法 ,第一种方法速度太慢

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