File Upload Control is not working

File name and extension are empty. Please help.

ASPX FILE CODE:

<tr>
  <td colspan="3" style="height:0px">
    <div id="trFile" runat="server" class="inlineGridAddAddress">
      <table cellpadding="0" cellspacing="0">
        <tr>
          <td>
            <div class="formFieldName">
              <asp:RequiredFieldValidator ID="reqFile" runat="server"
                  ControlToValidate="fileUpload" ErrorMessage="Please select File"
                  ValidationGroup="Save" CssClass="Validations" ></asp:RequiredFieldValidator>
            </div>
          </td>
        </tr>
        <tr>
          <td>
            <asp:Label ID="lblFile" runat="server">File:</asp:Label>
          </td>
          <td>
            <div>
              <asp:FileUpload ID="fileUpload" runat="server" />
            </div>
          </td>
          <td class="tdformFieldValueLogin" style="width:350px;padding-left:50px">
            <asp:ImageButton ID="btnFileUploadSave" runat="server" ValidationGroup="Save"
                ImageUrl="~/App_Themes/Default/images/update.png" ToolTip="Save"
                Height="18px" onclick="btnFileUploadSave_Click"/>
            <asp:ImageButton ID="btnFileUploadCancel" ImageUrl="~/App_Themes/Default/images/cancel.png"
                runat="server" ToolTip="Cancel" Height="18px" />
          </td>
        </tr>

        <tr>
          <td>
            <div class="formSmallTextAreaName">
              <asp:Label ID="lblDescription" runat="server">Description:</asp:Label>
            </div>
          </td>
          <td>
            <div class="formSmallTextAreaValue">
              <asp:RegularExpressionValidator ID="revNote"
                  runat="server" ControlToValidate="txtDescription"
                  ValidationExpression="^[sS]{0,4096}$"
                  Text="Maximum 4096 characters are allowed."
                  CssClass="Validations" Display="Dynamic">
              </asp:RegularExpressionValidator>
              <asp:TextBox ID="txtDescription"
                  runat="server" CssClass="textEntry1"
                  TextMode="MultiLine" MaxLength="4096" Width="218px">
              </asp:TextBox>
            </div>
          </td>
        </tr>
      </table>
    </div>
  </td>
</tr>

CS FILE CODE:

protected void btnFileUploadSave_Click(object sender, ImageClickEventArgs e)
    {
        string path = Server.MapPath(".") + "\Files\" + this.fileUpload.FileName;
        string fileExtension = System.IO.Path.GetExtension(this.fileUpload.FileName).ToLower();
        if (fileExtension == ".txt" || fileExtension == ".doc" || fileExtension == ".docx" || fileExtension == ".zip" || fileExtension == ".rar" || fileExtension == ".cs" || fileExtension == ".ppt" || fileExtension == ".pdf" || fileExtension == ".html" || fileExtension == ".jpg" || fileExtension == ".gif" || fileExtension == ".bmp" || fileExtension == ".png" || fileExtension == ".tif" || fileExtension == ".rm" || fileExtension == ".mp3" || fileExtension == ".xls")
        {
            this.fileUpload.PostedFile.SaveAs(path);
        }
    }

Answers:

Thank you for visiting the Q&A section on Magenaut. Please note that all the answers may not help you solve the issue immediately. So please treat them as advisements. If you found the post helpful (or not), leave a comment & I’ll get back to you as soon as possible.

Method 1

If you’re putting your UploadControl in an UpdatePanel (Ajax stuff), it won’t work by default. Use Update Panel, File Upload Control and use a PostBackTrigger Control to force a postback only for the File Upload Control

Check out the following link

File Upload in UpdatePanel, ASP.NET AJAX

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0