Extension method for events

Question

Hi experts ,

I was reading a question posted by a user on
https://learn.microsoft.com/en-us/answers/questions/1389629/avoid-code-duplication

and @Karen Payne MVP , suggets the user of creating a extension method. So, I also have a question about the similar topic . The question is what if , in addition of common properties , we want to create a extension method or something like that , for a bunch of events that are common to a normal datagridview and custom datagridview .

some few events which i am interested in are

  protected override bool ProcessCmdKey(ref Message msg, Keys keyData)        
        {
            
                int row = this.CurrentCell.RowIndex;
                int col = this.CurrentCell.ColumnIndex;

 protected override bool ProcessKeyPreview(ref Message m)
        {

  protected override void OnEditingControlShowing(DataGridViewEditingControlShowingEventArgs e)
        {

thanks in advance .

Answer 1

Hi @Rajkumar Rao , Welcome to Microsoft Q&A,

In the same way you can add events to them.

But the customized datagridview events are different in the desgin stage.

You can add the same events as ordinary datagridiview directly after creation.

The sample code is as follows:

  public static class DataGridViewExtensions
  {
      public static void SetCommonEvents(this DataGridView sender)
      {
          sender.CellClick += CellClickEventHandler;
          sender.EditingControlShowing += EditingControlShowing;
      }
      public static void CellClickEventHandler(object sender, DataGridViewCellEventArgs e)
      {

      }

      public static void EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
      {

      }
  }

Then manually use dataGridView1.SetCommonEvents(); for each one

Or foreach all datagridview added.

Best Regards,

Jiale

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