通过使用Firebug删除“ disabled”属性在C＃中启用按钮

Question

I have a question about disable button (C#) that I need your help.

in Asp.net (C#), disable the button code:

    Button btn = new Button();
    btn.click += new EventHandler(btn_click);
    btn.Enabled = false;
    btn.UseSubmitBehavior = false;

The generated HTML:

The button is disabled until I use and and ( ) then user can click on btn and it can perform method(postback).

How could we prevent this issue? I try to use CommandName (disable, enable) to mark disable button and inside btn_click method, I check if then stop the function but it is very messy.

Thanks for your help.
Van

Answer 1

Client can remove the Disabled attribute but cannot change the control ViewState. On server side you can do that:

protected void btn_Click(object sender, EventArgs e)
{
     if (btn.Enabled)
     {
           // do something         
     }
}

<asp:Button ID="btn" runat="server" Enabled="false" OnClick="btn_Click" Text="Test" />

Answer 2

You can't control your users' behavior.What you need to do is handle these things in server-side..

you can judge the button's status in btn_click.. and then do some work

Answer 3

@bystander is right. You need to check on the server whether that condition is correct. You can't rely on the client being 100% fool proof, and that's the exact reason why.

Can you hide the control instead, and reenable it on some future postback? Hiding doesn't actually render the control to the client at all.