How to call Datagridview cell double click event from a button?

Question

I'm trying to call datagridview cell event method from an another button.

DataGridView Cell Double Click Method

private void ListDataGridView_CellDoubleClick(object sender, DataGridViewCellEventArgs e)
        {
            if (e.RowIndex >= 0)
            {
                ListDataGridView.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
                DataGridViewRow row = this.ListDataGridView.Rows[e.RowIndex];

                comboBox2.Text = row.Cells[1].Value.ToString();

            }
        }

This is Button where I'm calling this method

private void button6_Click(object sender, EventArgs e)
{
  ListDataGridView_CellDoubleClick(sender, e);
}

Error I'm receiving

Error 3 The type or namespace name 'DataGridViewCellEventHandler' does not exist in the namespace 'System' (are you missing an assembly reference?) C:\\VisualC#\\Projects\\DataGridViewApplication\\DataGridViewApplication\\List.Designer.cs 340 46 DataGridViewApplication

What I did:

I changed EventArgs to DataGridViewCellEventArgs.

private void button6_Click(object sender, DataGridViewCellEventArgs e)
   {    
     ListDataGridView_CellDoubleClick(sender, e);
   }

Now I'm receiving Error:

this.button6.Click += new System.EventHandler(this.button6_Click);

Error 3 No overload for 'button6_Click' matches delegate 'System.EventHandler'

C:\\VisualC#\\Projects\\DataGridViewApplication\\DataGridViewApplication\\List.Designer.cs 340 35 DataGridViewApplication

Now I changed button event handler code to this

this.button6.Click += new System.DataGridViewCellEventHandler(this.button6_Click);

Still Receiving this error and stucked here

Error 3 No overload for 'button6_Click' matches delegate 'System.EventHandler'

Found a solution here: How to call a datagridview event with a click of a button?

private void button6_Click(object sender, EventArgs e)
        {
            ListDataGridView_CellDoubleClick(null, null);  
        }

but this is not working for me, it gives me an error.

Object Reference not set to an instance of an object.

Answer 1

    private void button6_Click(object sender, EventArgs e)
    {

        ListDataGridView_CellDoubleClick(this.ListDataGridView, new DataGridViewCellEventArgs(this.ListDataGridView.CurrentCell.ColumnIndex,this.ListDataGridView.CurrentRow.Index));

    }

Answer 2

I would expect you have this at the top of you Form.cs file:

using  System.Windows.Forms;

Eventhandlers are strongly typed, so both event and handler need to have matching types.

The Click eventhandler requires a method signature of void(object sender, EventArgs e) so your initial code was the right approach:

private void button6_Click(object sender, EventArgs e)
{
  // create and set values for the event argument. 
  // it can't be EventArgs, so just instantiate the right type
  // the constructor needs a row and column
  var datagridviewArgs = new DataGridViewCellEventArgs(42,13);
  ListDataGridView_CellDoubleClick(sender, datagridviewArgs);
}

but as you can see you need to provide the correct type for the second parameter, the DataGridViewCellEventArgs , on the call to ListDataGridView_CellDoubleClick .

Answer 3

Use this...

private void btnChoose_Click(object sender, EventArgs e)
{

    MouseEventArgs b = new MouseEventArgs(System.Windows.Forms.MouseButtons.Left, 2, 
        MousePosition.X, MousePosition.Y, 0);
    DataGridViewCellMouseEventArgs a = new DataGridViewCellMouseEventArgs(0, 0, 
        MousePosition.X, MousePosition.Y, b);
    dataGridView1_CellMouseDoubleClick(sender, a);
}