unable to do post back for asp.net button

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Hi, i have asp.net button as

XML

<div>
                                          <div>

                                              <%-- <asp:FileUpload ID="FileUpload2" runat="server" Width="290px" />--%>
                                              <asp:FileUpload ID="FileUpload2" runat="server" Width="330px" Font-Size="12px"  />

                                          </div>
                                          <div id="divspanError"  class="strttxt" style="font-size: 12px; font-family: Calibri; width: 330px; height: 15px; text-align: left;">
                                              <%-- <span class="strttxt" style="padding-left: 0px; padding-top: 1px; color:red;font-size:14px;font-family:Calibri;" id="spanError" runat="server"></span>--%>
                                              <asp:RequiredFieldValidator ID="RequiredFieldValidator4" runat="server"
                                                  ErrorMessage="Please Select your txt file" CssClass="validationCss" ValidationGroup="I" ForeColor="Red" Font-Size="12px"
                                                  ControlToValidate="FileUpload2"></asp:RequiredFieldValidator>

                                          </div>

                                      </div>

CSS

<asp:Button ID="btnUpload" runat="server"  CssClass="trnsferpopupbtn" ValidationGroup="I" OnClick="btnUpload_Click"
                                                           Text="Upload" Style="width: 180px; height: 35px" />

the problem is that when i click on that button postback is not happening ,button click event does not fire ,when i view source the page it show me on the button onclick

javascript:WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions("btnUpload", "", true, "I", "", false, false))

Posted 8-Jan-14 18:26pm

aassaahh

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Gitanjali Singh 9-Jan-14 0:37am

have you added btnUpload_Click event in code behind?

aassaahh 9-Jan-14 0:57am

yes i have added btnUpload_Click in code behind

Sibasisjena 9-Jan-14 1:17am

Please check my solution @aassaahh

VICK 9-Jan-14 1:03am

have you used if(!isPostBack) on your page load ????????

4 solutions

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Sibasisjena · Answer 1 · 2014-01-08T19:14:00

Hi aassaahh,

Every thing is fine in your code. There are 2 condition
1.If you select anything in the Browse Button then if you will click on the button it will do a post back as well as call the btnUpload_Click method.
2.If you select nothing in the Browse Button then if you will click on the button it will do nothing.

It is happening because you have used a ValidationGroup="I" .

C#

protected void Page_Load(object sender, EventArgs e)
      {
          if (IsPostBack)
          {
              //This code block will when the page will be posted back.
          }
      }

JoCodes · Answer 2 · 2014-01-08T19:16:00

Solution 3

Seems to be the client validation is causing the issue. Test it by removing the validation group for the button or by using CausesValidation="false". After confirming that you can make necessary change for validation.

Posted 8-Jan-14 19:16pm

JoCodes

kanjolia gopal · Answer 3 · 2014-01-08T20:57:00

Solution 4

use
onclick="btnUpload_Click" on aspx page and on aspx.cs page use

C#

protected void btnUpload_Click(object sender, EventArgs e)
    {

    }

Posted 8-Jan-14 20:57pm

kanjolia gopal

er.rakesh · Answer 4 · 2014-01-08T18:51:00

write onclick instead of OnClick in your below code.

in

CSS

<asp:Button ID="btnUpload" runat="server"  CssClass="trnsferpopupbtn" ValidationGroup="I" OnClick="btnUpload_Click"
                                                           Text="Upload" Style="width: 180px; height: 35px" />

unable to do post back for asp.net button

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