C#实现导出Excel

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。

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29

/// <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。

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43

/// <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：

?

1	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：

?

1	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
            })