asp.net无法正常工作

Question

当我单击此按钮时，带有按钮“ btnExportToExcel ”的简单程序不会显示任何响应。当我在执行所有行后调试此按钮代码时，第二次单击按钮后将显示表单，光标转到另一个名为GridView1_RowCreated方法（用于设计网格），但不响应将网格转换为Excel。

我现在应该怎么办？

 protected void btnExportToExcel_Click(object sender, EventArgs e)
    {

        Response.ClearContent();           
        Response.AppendHeader("content-disposition", "attachment;
                                            filename=Inventory.xls");
        Response.ContentType = "application/ms-excel";

        StringWriter stringWriter = new StringWriter();
        HtmlTextWriter htmlTextWriter = new HtmlTextWriter(stringWriter);


        GridView1.RenderControl(htmlTextWriter);
        Response.Write(stringWriter.ToString());
        Response.End();

    }




  protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)
    {
        //Add CSS class on header row.
        if (e.Row.RowType == DataControlRowType.Header)
            e.Row.CssClass = "header";

        //Add CSS class on normal row.
        if (e.Row.RowType == DataControlRowType.DataRow &&
                  e.Row.RowState == DataControlRowState.Normal)
            e.Row.CssClass = "normal";

        //Add CSS class on alternate row.
        if (e.Row.RowType == DataControlRowType.DataRow &&
                  e.Row.RowState == DataControlRowState.Alternate)
            e.Row.CssClass = "alternate";
    }

Answer 1

您需要在后台重新绑定GridView。

protected void btnExportToExcel_Click(object sender, EventArgs e)
{

    Response.ClearContent();           
    Response.AppendHeader("content-disposition", "attachment; filename=Inventory.xls");
    Response.ContentType = "application/ms-excel";

    StringWriter stringWriter = new StringWriter();
    HtmlTextWriter htmlTextWriter = new HtmlTextWriter(stringWriter);

    GridView1.DataBind();
    GridView1.RenderControl(htmlTextWriter);
    Response.Write(stringWriter.ToString());
    Response.End();

}

Answer 2

试试这个代码工作正常

protected void btnExportToExcel_Click(object sender, EventArgs e)
{
       // Grid_bindExcel();
        Response.ClearContent();
        Response.ClearHeaders();
        Response.AddHeader("content-disposition", "attachment;filename=Category.xls");
        Response.ContentType = "application/ms-excel";
        Response.ContentEncoding = System.Text.Encoding.Unicode;
        Response.BinaryWrite(System.Text.Encoding.Unicode.GetPreamble());
        System.IO.StringWriter sw = new System.IO.StringWriter();
        System.Web.UI.HtmlTextWriter hw = new HtmlTextWriter(sw);
        Label lblheader = new Label();
        lblheader.Font.Size = 14;
        lblheader.Font.Bold = true;
        lblheader.Text = "Category Detail";
        lblheader.RenderControl(hw);

        GrdExcel.Visible = true;
        GrdExcel.RenderControl(hw);
        Response.Write(sw.ToString());
        Response.Flush();
        Response.End();
        GrdExcel.Visible = false;
}
public override void VerifyRenderingInServerForm(Control control)
{

}