DataTable导出Excel

public static void DataTable1Excel(System.Data.DataTable dtData)

        {

            System.Web.UI.WebControls.GridView gvExport = null;

            // 当前对话 

            System.Web.HttpContext curContext = System.Web.HttpContext.Current;

            // IO用于导出并返回excel文件 

            System.IO.StringWriter strWriter = null;

            System.Web.UI.HtmlTextWriter htmlWriter = null;

            if (dtData != null)

            {

                // 设置编码和附件格式 

                curContext.Response.ContentType = "application/vnd.ms-excel";

                curContext.Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");

                curContext.Response.Charset = "utf-8";

                // 导出excel文件 

                strWriter = new System.IO.StringWriter();

                htmlWriter = new System.Web.UI.HtmlTextWriter(strWriter);

                // 为了解决gvData中可能进行了分页的情况，需要重新定义一个无分页的GridView 

                gvExport = new System.Web.UI.WebControls.GridView();

                dtData.Columns["id"].ColumnName = "编号";

                dtData.Columns["deptName"].ColumnName = "部门名称";

                dtData.Columns["trueName"].ColumnName = "员工姓名";

                dtData.Columns["sname"].ColumnName = "工作量名称";

                dtData.Columns["writeDate"].ColumnName = "录入日期";

                dtData.Columns["selectDate"].ColumnName = "业务时间";

                dtData.Columns["workloadYear"].ColumnName = "年份";

                dtData.Columns["workloadMonth"].ColumnName = "期数";

                dtData.Columns["pc"].ColumnName = "批次";

                dtData.Columns["trueValue"].ColumnName = "工作量（单位次）";

                //dtData.Columns["endScores"].ColumnName = "分值";

                //dtData.Columns["totalScores"].ColumnName = "总分值";

                //dtData.Columns["gwName"].ColumnName = "岗位名称";

                gvExport.DataSource = dtData.DefaultView;

                gvExport.AllowPaging = false;

                gvExport.DataBind();

                // 返回客户端 

                gvExport.RenderControl(htmlWriter);

                curContext.Response.Write("<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />" + strWriter.ToString());

                curContext.Response.End();

            }

        }