Drag Drop Text from DataGridView to RichTextBox or TextBox

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Introduction

In this article, we will learn how to drag a cell's text from a DataGridView and drop it to a Textbox or RichTextBox control.

Using the Code

In the drag operation of text from the DataGridView cell, the following events participate:

dataGridView1_MouseDown

This event occurs when the mouse pointer is over the control and a mouse button is pressed. We use this event to capture the cell's text which is being dragged from the DataGridView. The following line of code accomplishes this:

//
//   if (e.Button == MouseButtons.Left)
//          {
//              DataGridView.HitTestInfo info = dataGridView1.HitTest(e.X, e.Y);
//              if (info.RowIndex >= 0)
//              {
//                  if (info.RowIndex >= 0 && info.ColumnIndex >= 0)
//                  {
//                      string text = (String)
//                       dataGridView1.Rows[info.RowIndex].Cells[info.ColumnIndex].Value;
//                      if (text != null)
//                          dataGridView1.DoDragDrop(text, DragDropEffects.Copy);
//                  }
//              }
//          }
//

DataGridView.HitTestInfo contains information such as the row and column indexes about a specific coordinate pair in the DataGridView control. This class cannot be inherited.

This is all that you have to write on DataGridView's events.

Drop a Text on TextBox

textBox1_DragDrop

This event occurs when the mouse pointer is on the textbox control and mouse button is released. You have to typecast the data from the DragEventArgs to assign it to the text property of the textbox.

//private void textBox1_DragDrop(object sender, DragEventArgs e)
//{
//    if (e.Data.GetDataPresent(typeof(System.String)))
//    {
//        textBox1.Text = (System.String)e.Data.GetData(typeof(System.String));
//    }
//}

textBox1_DragEnter

This event occurs when the mouse pointer is dragged and it enters in the textbox. Here you have to specify the effects of the drag-drop operation.

//private void textBox1_DragEnter(object sender, DragEventArgs e)
//{
//  e.Effect = DragDropEffects.Copy;
//}

Other than this, you also have to set the AllowDrop property of the textbox to true.

Drop a Text in RichTextBox

To drop a text in the RichTextBox, you only have to set its EnableAutoDragDrop property to true.

History

• 19^th April, 2007: Initial post