/// <summary>/// DataTable导出到Excel/// </summary>/// <param name="dt">DataTable类型的数据源</param>/// <param name="FileName">文件名</param>/// <param name="httpContext">httpcontext</param>public void CreateExcel(DataTable dt, string FileName, HttpContext httpContext){httpContext.Response.Clear();httpContext.Response.Charset = "UTF-8";httpContext.Response.Buffer = true;httpContext.Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");httpContext.Response.AppendHeader("Content-Disposition", "attachment;filename=\"" + System.Web.HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8) + ".xls\"");httpContext.Response.ContentType = "application/ms-excel";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";}}httpContext.Response.Output.Write(ls_item);ls_item = string.Empty;}httpContext.Response.Output.Flush();httpContext.Response.End();}

                <a  href="Import.ashx" >导出Excel</a>

 /// <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();}

                     <a οnclick="Import()">导出Excel</a>function Import() {$.post("Import.ashx", {}, function (data) {alert("导出成功");});}