C#

Rahul Babu wrote:

Why we do always associate events with delegates

Rahul Babu wrote:

Why a normal function cannot be called when an event fires ?

public class Bar 
{
  event Action MyEvent;

  void Foo()
  {
    //Handle event;
  }

  public Bar()
  {
    MyEvent += Foo;
  }
}

Rahul Babu wrote:

Why a normal function cannot be called when an event fires

Rahul Babu wrote:

Why a normal function cannot be called

aspdotnetdev wrote:

3) Events must have a certain signature (e.g., a sender and a parameter derived from EventArgs).

DaveyM69 wrote:

Incorrect, they can use any of the normal access modifiers

DaveyM69 wrote:

As you've already discovered below, also incorrect... the can have any signature and even a return type!

MonStuff:

Finally, even though C# allows it, the .NET framework adds a restriction on the signature of delegates that can be used as events. The signature should be foo(object source, EventArgs e), where source is the object that fired the event and e contains any additional information about the event.

combobox.datasource = data.tbtest;
combobox.DisplayMember = "Text";
comboBox.ValueMember = "ID";

table.TestID = Convert.ToByte(comboBox.Selectedvalue)

table.TestID = Convert.ToByte((int)comboBox.Selectedvalue)

spankyleo123 wrote:

. When i select an item from the combobox and tab to the next control... its giving me the same exception