Control Currently Click

Question

Hi All,

I've created some code that will dynamically generate a bunch of different LinkButtons. I've got each link button's onClick even pointing to:

  void LinkButton_Click(object sender, EventArgs e) 
  {
     Response.Write("You clicked the link button");
  }

This runs fine, but now I when one of the LinkButtons is click I want to get its ID and send that to another function.

Any help would be greatly appreciated.

Matt

Answer 1

You need to cast sender to the specific type of control, as in:

void LinkButton_Click(Object sender, EventArgs e) 
{
  LinkButton button = sender as LinkButton;

  if(button != null)
  {
    //do something
  }

  Response.Write("You clicked the link button";  
}

The as operator will attempt to cast sender to type LinkButton. If this is not successful, local variable button will be set to null. Note that this is different behavior than (LinkButton)sender, which will throw an exception if the typecast is not appropriate.