Question

I have web form in which I have to make sure that ‘SUBMIT’ button is being clicked no more than 3 times. I have some logic in the form which restricts the user to enter anything after 3 failed attempts.

This is my logic, but I know this is not right:

protected void btnSubmit_Click(object sender, EventArgs e)
{
    int count = 0;
    count++;
    if (count <= 3) 
    {
        Function1();
    }
    else
        MessageBox("You submitted your information more than 3 times.");

}

This wont work because count will be ZERO every time the page refreshes up.

Answer 1

Save the variable in the ViewState of the page. Initialize its value on the first load of the page:

void Page_Load(object sender, EventArgs e)
{
    if (!Page.IsPostBack)
    {
        this.ViewState["Count"] = 0;
    }
}

On the Button.Click event increase the value of the count variable :

protected void btnSubmit_Click(object sender, EventArgs e)        
{            
    Int32 count = Int32.Parse(this.ViewState["Count"].ToString()) + 1;
    this.ViewState["Count"] = count;
    if (count > 3)
    {
        // Do something ..
    }
}