My question is a simple one to answer I hope.
I am making a simple form with a file upload control that was not used in an AJAX panel at first and for the life of me I cannot work out why my code, which remains unchanged, would not find the contents of the FileUpload control.
<asp:Panel ID="pnlUpload" runat="server" class="workerDetailsPanelLeft" Visible="true">
<h3 class="titleHighlightStyle">Probation Documents</h3><br />
<table cellspacing="0">
<tr>
<td class="standardLabel" valign="top">Current Documents</td>
<td colspan="2">
<asp:ListBox ID="lstDocs" runat="server" Width="200px"></asp:ListBox>
</td>
</tr>
<tr>
<td>
</td>
<td>
<asp:ImageButton ID="btnSelect" runat="server" SkinID="selectprobationdoc"/>
</td>
<td class="standardLabel" style ="width:200px">Select documents</td>
</tr>
<tr>
<td>
</td>
</tr>
<tr>
<td class="standardLabel">Upload Documents</td>
<td colspan="2">
<asp:FileUpload ID="uplDoc" runat="server" Height="22px" Width="200px"/>
</td>
</tr>
<tr>
<td>
</td>
<td>
<asp:Button ID="btnSave" runat="server" Text="Save" OnClick="btnSave_Click" CausesValidation="False" />
</td>
</tr>
<tr>
<td>
</td>
</tr>
<tr>
<td>
<asp:Label ID="lblUploadError" runat="server" Text="Probation document required" ForeColor="Red" Visible="false"></asp:Label>
</td>
</tr>
</table>
</asp:Panel>
Forgive the formatting I deleted the white space!!
Now when my markup is like this and I call .HasFile() on the FileUpload it returns a null value?
When I add the following
<asp:UpdatePanel ID="ContentPanel" UpdateMode="Conditional" runat="server" ChildrenAsTriggers="true">
<Triggers>
<asp:PostBackTrigger ControlID="btnSave" />
</Triggers>
<ContentTemplate>
*Markup as above*
I can get the contents of the control. I understand that there was an issue with the Ajax update panel with file upload control and the solution is to add a postback trigger, but can anyone see from this markup why it may fail o find the file?
if (this.uplDoc.HasFile)
{
String fileExtension = System.IO.Path.GetExtension(uplDoc.FileName).ToLower();
String validExt = sAllowedExt;
if (validExt.IndexOf("," + fileExtension + ",") != -1)
{
if (this.uplDoc.FileBytes.Length >= 0)
{
return string.Empty;
}
else
{
return "PROC0003"; //Invalid File Size
}
}
else
{
return "PROC0002"; //Invalid file type
}
}
Above is the initial code behind check, this never changed from ading the update Panel.
Can someone help me understand what I missed?
Thanks