Question

Using Lock in asp.net how can i prevent more than one user to click on button. I mean only one user has to click on button at a time, more than one user not to click on button.
How can i use lock, any refrence to study.

Answer 1

You cannot really prevent different users from clicking “the same” button on “the same” page. But you can prevent several requests from being active in the same code block at the same time:

private static object PadLock = new object();
protected void Button1_Click(object sender, EventArgs e)
{
    lock (PadLock)
    {
        // do work here. only one thread can run code in this block at any one time
        // start by verifying if the work was already done. if not do the work
    }
} 

Although this would serialize access to the code in Button1_Click, I would advise against using ti if it’s not absolutely necessary. The lock statement blocks (potentially forever) until the previous lock holder releases the lock.