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。

        /// <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
            })