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asp.netif-statementascx

Can you place an if statement in .ascx layout?

I'm new with working with ASP.net and .ascx, and now I've seen a button that calls a method by 'OnClientClick' So the code looks like this:

<asp:Button Text="Save" OnClick="BtnSave_Click" OnClientClick="isBusy();"/>

Now I want that the method only calls at certain definitions declared in the same .ascx file. And thus I thought that an if-statement inside the ascx would work. So I've already tried attempts like OnClientClick="if(Text.Length <= maxlength) { isBusy(); } but that caused the line to not respond at all.

Currently I'm wondering if an if-statement in this situation is actually possible.

Solution

  • it is doable. but you need to make sure your js is correct.

    in your question, what is Text.Lengh ?

    whatever, if you want block the server side postback, then return false in your onclick JS, that will completely mute the postback event

    for example 

    <asp:button runat="server" onclientclick="return false;" />

    this button will never post back