Bonjour, je veux exporter mon grid vers excel :

Code : Sélectionner tout - Visualiser dans une fenêtre à part
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        <asp:UpdatePanel runat="server">
            <ContentTemplate>
                <asp:HiddenField ID="HiddenFiltre" runat="server" />
                <asp:TabContainer ID="TabContainer" runat="server" CssClass="fancy fancy-green">
                    <asp:TabPanel ID="Tabstations" runat="server" HeaderText="Liste des Stations">
                        <ContentTemplate>
                            <asp:UpdatePanel ID="upGridliste" runat="server">
                                <ContentTemplate>
 
                                    <h3 class="blocksubhead">
                                        Stations filtrées :</h3>
                                    <div>
                                        <br />
                                        <asp:GridView ID="listeStations" runat="server" AutoGenerateColumns="False" OnRowCommand="listeStations_RowCommand"
                                            AllowPaging="True" ForeColor="#333333" BorderColor="#E6E6E6" GridLines="Horizontal"
                                            Width="940px" Style="font-size: 9pt; color: black; font-family: Arial" PageSize="20"
                                            OnPageIndexChanging="listeStations_PageIndexChanging">
                                            <AlternatingRowStyle BackColor="White" />
                                            <Columns>
                                                .....
                                            </Columns>
                                            <EditRowStyle BackColor="#2461BF" />
                                            <FooterStyle BackColor="#0066FF" Font-Bold="True" ForeColor="#e9e9e9" />
                                            <HeaderStyle BackColor="#0066FF" Font-Bold="false" ForeColor="#e9e9e9" Font-Size="9"
                                                Height="30px" HorizontalAlign="Left" />
                                            <PagerStyle BackColor="#0066FF" ForeColor="#e9e9e9" HorizontalAlign="Left" Height="20px" />
                                            <RowStyle BackColor="#f3f3f3" Font-Size="9" Height="25px" />
                                            <SelectedRowStyle BackColor="#D1DDF1" Font-Bold="false" ForeColor="#333333" />
                                            <SortedAscendingCellStyle BackColor="#F5F7FB" />
                                            <SortedAscendingHeaderStyle BackColor="#6D95E1" />
                                            <SortedDescendingCellStyle BackColor="#E9EBEF" />
                                            <SortedDescendingHeaderStyle BackColor="#4870BE" />
                                        </asp:GridView>
                                    </div>
                                    <br>
                                </ContentTemplate>
                            </asp:UpdatePanel>
                            <div style="text-align: right">
                                <asp:Button ID="AllExporter" Text="Exporter le tableau" CssClass="button" runat="server"
                                    OnClick="AllExporter_Click" />
                            </div>
 
                        </ContentTemplate>
                    </asp:TabPanel>
                    <asp:TabPanel ID="TabInfos" runat="server" HeaderText="Detail">
                        ....
                    </asp:TabPanel>
                    <asp:TabPanel ID="TabEchange" runat="server" HeaderText="Correspondances">
                        <ContentTemplate>
                            ....
                        </ContentTemplate>
                    </asp:TabPanel>
 
                </asp:TabContainer>
            </ContentTemplate>
        </asp:UpdatePanel>
mon grid s'affiche bien

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    public override void VerifyRenderingInServerForm(Control control)
    {
        /* Verifies that the control is rendered */
    }
 
    protected void AllExporter_Click(object sender, EventArgs e)
    {
        //string nmFile = "Export_" + System.DateTime.Now.Day + "_" + System.DateTime.Now.Month + "_" + System.DateTime.Now.Year + ".xls";
 
        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
            //listeStations.AllowPaging = false;
            //this.BindGrid();
 
            listeStations.HeaderRow.BackColor = Color.White;
            foreach (TableCell cell in listeStations.HeaderRow.Cells)
            {
                cell.BackColor = listeStations.HeaderStyle.BackColor;
            }
            foreach (GridViewRow row in listeStations.Rows)
            {
                row.BackColor = Color.White;
                foreach (TableCell cell in row.Cells)
                {
                    if (row.RowIndex % 2 == 0)
                    {
                        cell.BackColor = listeStations.AlternatingRowStyle.BackColor;
                    }
                    else
                    {
                        cell.BackColor = listeStations.RowStyle.BackColor;
                    }
                    cell.CssClass = "textmode";
                }
            }
 
            listeStations.RenderControl(hw);
 
            //style to format numbers to string
            string style = @"<style> .textmode { } </style>";
            Response.Write(style);
            Response.Output.Write(sw.ToString());
            Response.Flush();
            Response.End();
        }
    }
Le programme s"execute bien sans aucune erreur mais le fichier ne s'affiche pas meme si le telechargement des fichiers est activee

des idees ?