How to use Fileupload inside Update and Tab panel

Question

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I tried using trigger .
Error message as below

A control with ID 'btnupload' could not be found for the trigger in UpdatePanel..

How to find the button control ID, or is there any other way.

Backend Code

C#

string excelPath = Server.MapPath("~/Files/") + Path.GetFileName(FileUpload1.PostedFile.FileName);
        FileUpload1.SaveAs(excelPath);

        string conString = string.Empty;
        string extension = Path.GetExtension(FileUpload1.PostedFile.FileName);

ASPX Code

<updatepanel>

XML

<asp:TabPanel ID="TabPanel7" runat="server" HeaderText="TabPanel7">
                    <ContentTemplate>
                        <br />
                        <asp:FileUpload ID="FileUpload1" runat="server" />
                        <asp:Button ID="btnupload" runat="server" OnClick="Button1_Click" Text="Button" />

                    </ContentTemplate>

                </asp:TabPanel>
            </asp:TabContainer>
        </ContentTemplate>
        <Triggers>
            <asp:PostBackTrigger ControlID="btnupload" />
        </Triggers>
    </asp:UpdatePanel>

Posted 6-Jun-14 0:11am

Kundan1984

Updated 6-Jun-14 0:12am

v2

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Comments

Kundan1984 6-Jun-14 12:53pm

Thanks DamithSL. You rock! I was wondering whole day and here comes the hero.......

1 solution

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DamithSL · Accepted Answer · 2014-06-06T00:36:00

in your page load method do as below

C#

protected void Page_Load(object sender, EventArgs e)
{
    Page.Form.Attributes.Add("enctype", "multipart/form-data");
    ScriptManager scriptManager = ScriptManager.GetCurrent(this);
    if (scriptManager != null)
    {
        scriptManager.RegisterPostBackControl(btnupload);
    }
}

remove the Triggers from aspx page. do it from the code behind