这段时间用到了导出Excel的功能，这个功能还是比较常用的，我常用的有两个方法，现在整理一下，方便以后查看。
一、实现DataTable数据导出到本地，需要自己传进去导出的路径。
/// <summary>
/// DataTable导出到Excel
/// </summary>
/// <param name="table">DataTable类型的数据源</param>
/// <param name="file">需要导出的文件路径</param>
public void dataTableToCsv(DataTable table, string file)
{
string title = "";
FileStream fs = new FileStream(file, FileMode.OpenOrCreate);
StreamWriter sw = new StreamWriter(new BufferedStream(fs), System.Text.Encoding.Default);
for (int i = 0; i < table.Columns.Count; i++)
{
title += table.Columns[i].ColumnName + "\t"; //栏位：自动跳到下一单元格
}
title = title.Substring(0, title.Length - 1) + "\n";
sw.Write(title);
foreach (DataRow row in table.Rows)
{
string line = "";
for (int i = 0; i < table.Columns.Count; i++)
{
line += row[i].ToString().Trim() + "\t"; //内容：自动跳到下一单元格
}
line = line.Substring(0, line.Length - 1) + "\n";
sw.Write(line);
}
sw.Close();
fs.Close();
}
二、实现DataTable数据导出到本地，路径可以由用户自主选择。
/// <summary>
/// DataTable导出到Excel
/// </summary>
/// <param name="dt">DataTable类型的数据源</param>
/// <param name="FileType">文件类型</param>
/// <param name="FileName">文件名</param>
public void CreateExcel(DataTable dt, string FileType, string FileName)
{
Response.Clear();
Response.Charset = "UTF-8";
Response.Buffer = true;
Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
Response.AppendHeader("Content-Disposition", "attachment;filename=\"" + System.Web.HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8) + ".xls\"");
Response.ContentType = FileType;
string colHeaders = string.Empty;
string ls_item = string.Empty;
DataRow[] myRow = dt.Select();
int i = 0;
int cl = dt.Columns.Count;
for (int j = 0; j < dt.Columns.Count; j++)
{
ls_item += dt.Columns[j].ColumnName + "\t"; //栏位：自动跳到下一单元格
}
ls_item = ls_item.Substring(0, ls_item.Length - 1) + "\n";
foreach (DataRow row in myRow)
{
for (i = 0; i < cl; i++)
{
if (i == (cl - 1))
{
ls_item += row[i].ToString() + "\n";
}
else
{
ls_item += row[i].ToString() + "\t";
}
}
Response.Output.Write(ls_item);
ls_item = string.Empty;
}
Response.Output.Flush();
Response.End();
}
三、方法的调用。
第一种方法的调用：
this.dataTableToCsv(dt, @"C:\Users\Admin\Desktop\收听率" + DateTime.Now.ToString("yyyy-MM-dd HHmmss") + ".xls"); //调用函数
第二种方法的调用：
CreateExcel(dt, "application/ms-excel", "Excel" + DateTime.Now.ToString("yyyy-MM-dd HHmmss") + ".xls");//调用函数
这两种方法都是可以直接调用的，只需要传入需要的参数即可。
如果是通过前台js方式实现，跳转href为实现数据导出的页面地址，我是通过前台跳转到ashx页面实现的
ashx页面内容
public void ProcessRequest(HttpContext context)
{string message = "";
string Action = context.Request["Action"];
switch (Action)
{case "Excel":
DataTable Radio = GetExcleData(context); //获取导出数据源
RadioCommon helper = new RadioCommon();
helper.ExportExcel(Radio, "application/ms-excel", "Excel" + DateTime.Now.ToString("yyyy-MM-dd HHmmss"));
break;
}
context.Response.Write(message);
}
js部分内容
$("#Excel").bind('click', function () {
var url = "AjaxHandler/RadioFamilyDayNumber.ashx?Action=Excel";
window.location.href = url;//导出Excel
})