Neeraj Kumar Gupta Neeraj Kumar Gupta - 2 months ago 24
ASP.NET (C#) Question

FileUpload.HasFile give always false

this is my code where my FileUpload control is outside of update panel but when I click on save button which is under update panel give fileUploadAttachment.HasFile = false

ASPX

<asp:Literal runat="server" ID="lblAttachment" Text="Attachment:" /><asp:FileUpload
ID="fileUploadAttachment" runat="server" Width="488px" />
<asp:UpdatePanel ID="updatePanelAction" runat="server" UpdateMode="Always">
<ContentTemplate>
<asp:Button ID="btnSave" runat="server" Text="Save" OnClick="btnSave_Click" ValidationGroup="Save" />
<asp:Button ID="btnTest" runat="server" Text="Test" Enabled="false" OnClick="btnTest_Click" />
<asp:Button ID="btnConfirmTest" runat="server" Text="Confirm Test" Enabled="false"
OnClick="btnConfirmTest_Click" />
<asp:Button ID="btnSend" runat="server" Text="Send" Enabled="false" OnClick="btnSend_Click" />
</ContentTemplate>

</asp:UpdatePanel>


CS

protected void btnSave_Click(object sender, EventArgs e)
{
CampaignBAL campaignBAL;
string tmpFileName = "";
User user;
Campaign campaignDetail = new Campaign();
int? campaignID;

if (fileUploadAttachment.HasFile) // return always false
{
tmpFileName = string.Format("{0}\\{1}{2}", Server.MapPath("TempUpload"), Guid.NewGuid(), Path.GetExtension(fileUploadAttachment.PostedFile.FileName));
fileUploadAttachment.PostedFile.SaveAs(tmpFileName);
}
}


please help me how can I fix it

Answer

You'll need to add postback triggers for controls that post within the UpdatePanel:

<asp:UpdatePanel ...>
  <Triggers>
    <asp:PostBackTrigger ControlID="btnSend" />
  </Triggers>
  ...
</asp:UpdatePanel>
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