ASP.NET button inside bootstrap modal not triggering click event

Question

I'm working in Bootstrap modal in my asp.net site, modal is working fine but the button btnSaveImage inside modal footer is not firing click event, I also have a masterpage and the form tag is in it.

Here is my code:

 <a href="#dvUpload" data-toggle="modal">
   <asp:Button runat="server" ID="lnkUploadPics" CssClass=" btn-large Greengradiant"
                                    Width="100%" Text="Upload pictures"></asp:Button>
   </a>
   <div id="dvUpload" class="modal hide fade" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"  aria-hidden="true">
     <div class="modal-header">
      <button type="button" class="close" data-dismiss="modal" aria-hidden="true">
         ×</button>
        <h3 id="myModalLabel">
             Upload Image</h3>
           </div>
             <div class="modal-body">
            <div class="row-fluid" style="padding-left: 10px; padding-right: 10px; padding-bottom: 20px;"> 
<div id="Upload" class="span6">
        <asp:FileUpload ID="fuImage" runat="server" />
       <img id="imgUPload" runat="server" src="" />
              </div>
             </div>
            </div>
          <div class="modal-footer">
           <button data-dismiss="modal" class="btn  btn-large"> Close</button>
           <asp:Button runat="server" ID="btnSaveImage" Text="Save Image" CssClass="Greengradiant btn-large" OnClick="btnSaveImage_Click" />
            </div>
         </div>

Answer 1

You can use the ASP Button like in your example

<div class="modal-footer">
   <button data-dismiss="modal" class="btn  btn-large"> Close</button>
   <asp:Button runat="server" ID="btnSaveImage" Text="Save Image" CssClass="Greengradiant btn- large" OnClick="btnSaveImage_Click" />
</div>

just try the UseSubmitBehavior="false" like said skhurams and combine it with the data-dismiss="modal"

<div class="modal-footer">
   <button data-dismiss="modal" class="btn  btn-large"> Close</button>
   <asp:Button runat="server" ID="btnSaveImage" Text="Save Image" CssClass="Greengradiant btn- large" OnClick="btnSaveImage_Click" UseSubmitBehavior="false" data-dismiss="modal" />
</div>

this will close the modal and trigger the postback

Answer 2

I'd like to add another point here. I faced this issue because my final rendered modal dialogs were placed outside the WebForms <form> tag, and using the UseSumbitBehavior="false" did not solve my problem. Moving the modal dialog divs inside the form solved the issue.

$("div.modalForm").appendTo($("form:first"));