Disable Postback on asp.net Button Click

Question

I would like to disable postback on a onClick event of a button.

I did some research online and most are using onClientClick and using javascript. Is there a way to call a asp.net function "btnCommit_Click" on the onClick instead of using onclientclick and using javascript?

If not, how would I be able to incorporate a asp.net function with javascript?

<asp:Button ID="btnCommit" runat="server" Text="Save" TabIndex="5" 
    onclick="btnCommit_Click" />

UPDATED I have a GridView which contains checkboxes, once the user makes their changes and click on a "Save Button" a Post Back occurs and I loose all the selections made to the checkboxes I was thinking of disabling the postback on the OnClick Event of the button would solve that issue...

Answer 1

I didn't exactly get what you are trying to achieve. But if you want to have both js and server-side to gether on an asp.net button, use OnClientClick and Onclick together. if you want to cancel the postback, return false in the OnClientClick js function. This way, the server-side OnClick event will never be called. otherwise, return true and the postback will occur.
Update:
Based on the comments and you update, if you want to persist the state of checkboxes in your gridview, you have to avoid overwriting anything that can affect you controls' states in the Page_Load event. What this simply means that you have to check for (IsPostback) in Page_Load event, and if it's true, you shouldn't do anything on your UI elements or you will lose their states.

Answer 2

Sounds like your problem is not putting your databinding and page setup inside a check for first page load.

http://msdn.microsoft.com/en-us/library/system.web.ui.page.ispostback.aspx

private void Page_Load()
{
    if (!IsPostBack)
    {
        // Do your databinding etc here to stop it occuring during postback
    }
}