use object in c#.net, like vb.net

Question

I have a method in VB.Net that calls button of form:

Private Sub BUTTON_CAL( _
    ByVal frm As Object, ByVal e As System.Windows.Forms.KeyEventArgs)

    If e.KeyCode = Keys.A AndAlso e.Modifiers = Keys.Control Then
        If frm.AddButton.Enabled = True Then Call frm.AddButton.PerformClick()
        e.SuppressKeyPress = True
    End if
End Sub

I have converted this code into c#

public static void BUTTON_CAL(object frm, System.Windows.Forms.KeyEventArgs e) {
    if(e.KeyCode==Keys.A&&e.Modifiers==Keys.Control) {
        if(frm.AddButton.Enabled==true) {
            frm.AddButton.PerformClick();
        }
        e.SuppressKeyPress=true;
    }
}

in C#.Net I am getting the error

'object' does not contain a definition for AddButton' and no extension method 'AddButton' accepting a first agument of type 'object' could be found(are you missing a using directive or an assembly reference?)

Answer 1

Cast 'frm' to the data type you expect it to be (runtime checking if valid is a good idea)

Form form = frm as Form;

if( null == form )
    // error

form.AddButton(...);

Answer 2

public static void BUTTON_CAL(object sender, KeyEventArgs e) {
    if(sender is Form) {
        var frm=sender as Form;

        if(e.KeyCode==Keys.A && e.Modifiers==Keys.Control) {
            if(frm.AddButton.Enabled)
                frm.AddButton.PerformClick();

            e.SuppressKeyPress=true;
        }
    }
}

1. The signature of KeyEventHandler is

    public delegate void KeyEventHandler(object sender, KeyEventArgs e); 

2. Rather if(SomeBool) than if(SomeBool==true) . Don't be unnecessarily complicated.

3. put someObject as SomeType in a if(someObject is SomeType) would be safe. It seems a little bit redundant, but more readable than compare to null.

Answer 3

Thank you all for giving time to solve the problem I have solved the problem by using below :

public static void BUTTON_CAL(object sender, System.Windows.Forms.KeyEventArgs e) 
{
     var frm = sender as Form;

     if(e.KeyCode==Keys.A&&e.Modifiers==Keys.Control) 
     {  
          if(frm.Controls["AddButton"].Enabled==true)
          {
             ((Button)frm.Controls["AddButton"]).PerformClick();
          }
          e.SuppressKeyPress=true;
     }
}

Answer 4

cast frm to the class name of your form

if (((Form1)frm).AddButton.Enabled == true){
   ((Form1)frm).AddButton.PerformClick();
}

I assume Form1 is the name of your form, and it has a button with name AddButton and that button has the proper access modifier.