Question

I have a div like as :

<div id="specific">
<table cellpadding="2" border="0">
<tr><td>Choose category</td><td><select id="list_categories" runat="server"></select></td><td><asp:RequiredFieldValidator ControlToValidate="list_categories" runat="server" Display="Static" ErrorMessage="Select category" ID="verify_category"></asp:RequiredFieldValidator></td></tr>
<tr><td>Link name : </td><td><asp:TextBox ID="link_name" runat="server"></asp:TextBox></td><td><asp:RequiredFieldValidator ControlToValidate="link_name" runat="server" Display="Static" ErrorMessage="Provide a name for link" ID="verify_link_name"></asp:RequiredFieldValidator></td></tr>
<tr><td>Link url : </td><td><asp:TextBox ID="link_url" runat="server"></asp:TextBox></td><td><asp:RegularExpressionValidator ID="verify_url" runat="server" ControlToValidate="link_url" Display="Static" ErrorMessage="Invalid link. Must be as http://www.stabiplan.com" ValidationExpression="^http\://[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(/\S*)?$"></asp:RegularExpressionValidator></td></tr>
<tr><td>Link description</td><td><asp:TextBox ID="link_descr" runat="server"></asp:TextBox></td><td><asp:RequiredFieldValidator ControlToValidate="link_descr" runat="server" ID="verify_descr" Display="Static" ErrorMessage="Provide a link description"></asp:RequiredFieldValidator></td></tr>
<tr><td colspan="2"><center><asp:Button runat="server" ID="add_link_process" Text="Add link" OnClick="add_link_function" /></center></td></tr>
</table>
</div>

and the function from CodeBehind.cs

protected void add_link_function( object sender, EventArgs e ) {
         BusinessLayerArcht layer = LoadDataFromBL();
         if ( layer.add_link( link_name.Text, link_url.Text, link_descr.Text, list_categories.Value.ToString() ) ) {
            messages.Text = "Link added successfully";
            LoadTree( tree );
         } else {
            messages.Text = "Link could not be added !";
         }
      }

When I click on the button, nothing happens. Why ?

If I remove DIV block and let the code inside the <table>, button click event works.

Thank you

Answer 1

I highly doubt it has anything to do with the div element. Usually, when a button does nothing it’s because validation is preventing the postback. To test this, set the CausesValidation property to false on the Button and try again.