ASP.NET aspx button click reset

Question

I have 2 Asp button in a page (buttonUsername and buttonReset). First one perform an AD search, and set a private variable, while second button perform an action, using variable previously set.

public partial class ResetPassword : System.Web.UI.Page {
    private UserPrincipal tmpPwdUser;

    protected void buttonUsername_Click(object sender, EventArgs e) {
        this.tmpPwdUser = ...
    }

    protected void buttonReset_Click(object sender, EventArgs e) {
        myObj.myFunction(this.tmpPwdUser); // --> this.tmpPwdUser is void
    }
}

My problem: this.tmpPwdUser is correctly set in buttonUsername_Click function, but when buttonReset_Click event is triggered, variable this.tmpPwdUser is null. I guess that when event is triggered, page is reloaded, so each local variable is reset. Is there a way to preserve state when button si clicked?

why not just put that value in a session variable or view states — Vinay Pratap Singh Bhadauria
– Vinay Pratap Singh Bhadauria, Commented Oct 28, 2013 at 15:22

Markus · Accepted Answer · 2013-10-28 15:44:37Z

2

As you suspect, a new instance of the form is created for the new request. You have to preserve the value of the variable between those requests. One way to do this is to store the value in ViewState.
You can create a helper property that stores and retrieves the value from ViewState:

private UserPrincipal TmpPwdUser
{
  get
  {
    return ViewState["UniqueViewStateKey"] As UserPrincipal;
  }
  set
  {
    ViewState["UniqueViewStateKey"] = value;
  }
}

answered Oct 28, 2013 at 15:44

Markus

22.7k4 gold badges34 silver badges61 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Ivan Sander de Jong · Accepted Answer · 2013-10-28 15:34:20Z

0

try using the OnEvent property instead of the onclick

Poperty on button ( OnCommand="Submit_Command") in code behind Submit_Command(object sender, CommandEventArgs e) { }

answered Oct 28, 2013 at 15:34

Ivan Sander de Jong

8351 gold badge11 silver badges28 bronze badges

Collectives™ on Stack Overflow

ASP.NET aspx button click reset

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related