GridView不会在Excel中导出最后一行

Question

我正在尝试将GridView的内容导出到ExcelSheet，而GridView的最后一行总是在Excel表中缺少。

我认为这可能是由于标头行，但无法弄清楚如何克服这一点。以下是导出到Excel表的代码

private void btnExportToExcel_OnClick(object sender, EventArgs e)
    {
        Response.Clear();
        Response.Buffer = true;
        Response.AddHeader("content-disposition", "attachment;filename=GridViewExport.xls");
        Response.Charset = "";
        Response.ContentType = "application/vnd.ms-excel";
        using (StringWriter sw = new StringWriter())
        {
            HtmlTextWriter hw = new HtmlTextWriter(sw);
            //To Export all pages
            GridView1.AllowPaging = false;
            GridView1.RenderControl(hw); //here gridview is not rendering last row 
            //style to format numbers to string
            string style = @"<style> .textmode { } </style>";
            Response.Write(style);
            Response.Output.Write(sw.ToString());
            Response.Flush();
            Response.End();
        }
    }

Answer 1

这对我来说很好。这是我的代码，带有简单的数据。我的aspx页面只有一个网格和一个导出按钮

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
    DataTable dt = new DataTable();
    dt.Columns.Add("Id");
    DataRow dr = dt.NewRow();
    dr["Id"] = 1;
    dt.Rows.Add(dr);
    dr = dt.NewRow();
    dr["Id"] = 2;
    dt.Rows.Add(dr);
    //To Export all pages
    grdTest.AllowPaging = false;
    grdTest.AllowSorting = false;
    grdTest.DataSource = dt;
    grdTest.DataBind();
}
public override void VerifyRenderingInServerForm(Control control)
{
    /* Verifies that the control is rendered */
}
protected void btnExport_Click(object sender, EventArgs e)
{
    {
        Response.Clear();
        Response.Buffer = true;
        Response.AddHeader("content-disposition", "attachment;filename=GridViewExport.xls");
        Response.Charset = "";
        Response.ContentType = "application/vnd.ms-excel";
        using (StringWriter sw = new StringWriter())
        {
            HtmlTextWriter hw = new HtmlTextWriter(sw);
            grdTest.RenderControl(hw); //here gridview is not rendering last row 
            //style to format numbers to string
            string style = @"<style> .textmode { } </style>";
            Response.Write(style);
            Response.Output.Write(sw.ToString());
            Response.Flush();
            Response.End();
        }
    }
}

Answer 2

我在任何地方都找不到解决方案，但我发现了发生这种情况的原因，这是由于一个添加了一个additonal gridviewrow在rowdatabound上添加到gridview，而单行的添加是跳过最后一行。

为了解决此问题，在GridView数据标记之前，我添加了一个空的页脚行以解决问题：

        DataRow dr= dt.NewRow();
        dt.Rows.Add(dr);
        GridView1.DataSource = dt;
        GridView1.DataBind();