ASP.net button onserverclick only works when onclick isn't defined

Question

    protected void btnNext_Click(object sender, EventArgs e)
    {
        btnNext.InnerHtml = \"CLICK\";
    }

    

        

Answer 1

try without 'return': <button type="submit" runat="server" onserverclick="btnNext_Click" onclick="checkForm();" id="btnNext">Next &gt;</button>
Or if you wanted checkForm() to control whether to post or not - do like this:

onclick="if (!checkForm()) return;"

Answer 2

Try this:

onclick="javascript:if (!validaForm()) return false;"

It worked for me.

Answer 3

The reason you're seeing this is because when you have both on a button it runs your on click handler followed by the __doPostBack function so the onclick would look something like this

onclick="return checkForm(); __doPostBack('btnNext','')

So as you can see the __doPostBack, which actually sets up which server function to call, is never called. However, since the button is of type submit, the form is still sent back to the server.

Answer 4

Front End

  <button  id="submit1" runat="server"  
              onclick="if(confirm('Sure?')) { } else{ return false} ;"                       onserverclick="submit_ServerClick"  >save</button>

Back End

 protected void submit_ServerClick(object sender, EventArgs e)
 {
 }

Answer 5

Can you try with LinkButton:

<asp:LinkButton type="submit" runat="server" onserverclick="btnNext_Click" onclick="return checkForm();" id="btnNext">Next &gt;</asp:LinkButton>