将数据源DataSet导出成Excel表格形式

//DataSet导出成Excel

public void GetExcel(DataTable dtData)

{

System.Web.UI.WebControls.GridView dgExport = 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

System.Web.HttpContext.Current.Response.Clear();

System.Web.HttpContext.Current.Response.HeaderEncoding = System.Text.Encoding.GetEncoding("gb2312");

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

curContext.Response.AppendHeader("Content-Disposition", "attachment;filename=" + dtData.TableName + DateTime.Today.ToShortDateString() + ".xls"); //定义输出文件和文件名

curContext.Response.ContentEncoding = System.Text.Encoding.UTF8;

System.Web.HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.Default;

curContext.Response.Charset = "";

// 导出excel文件

strWriter = new System.IO.StringWriter();

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

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

dgExport.DataSource = dtData.DefaultView;

dgExport.AllowPaging = false;

dgExport.DataBind();

dgExport.RenderControl(htmlWriter);

curContext.Response.Write(strWriter.ToString());

curContext.Response.End();

}

}

如果要导出的DataSet是根据用户特定的查询条件得来绑定到显示的控制(DataGrid..等上面)

在这个方法中获取不到值的时候，可以将值取出的时候放到页面缓存中。。。

如：ViewState["DataSet"] = ds;

DataSet ds = (DataSet)ViewState["DataSet"]; 然后转成DataTable