ASP.NET: OnClientClick

What's the point of the OnClientClick attribute for an ASP.NET control? Doesn't it simply generate开发者_JS百科 an onclick attribute for the HTML element?

Yes, it does just generate the client-side onclick attribute.

It is there to distinguish it from OnClick attribute, which generates the server-side click event.

yes

http://www.w3schools.com/aspnet/prop_webcontrol_button_onclientclick.asp

OnClick property is used to set server side Click event. So OnClientClick property is used to set client side OnClick attribute.

<!-- Calls btn_Click server side click event -->
<asp:Button runat="server" ID="btn" OnClick="btn_Click" />

<!-- Calls client side click event  -->
<asp:Button runat="server" ID="btn" 
    OnClientClick="alert('client side click event.')" />