Determine cell location in DataGridView

Question

Given a specific row number and column index how can I calculate the cell location (IE: Location.Point) inside a DataGridView?

The reason I need the location of the cell is so I can position a button inside the cell to allow for folder browsing (the datagridview shows folderpaths).

Alternative suggestions about how to accomplish this welcome.

Solution

You can't really find a point for a DGV cell because cells occupy a rectangular area in a DGV. However, you can find this area by using the DataGridView.GetCellDisplayRectangle() method. It returns a Rectangle for the display area of a DGV Cell given by the Cell's column and row indices. If you really want a point you can easily use the Rectangle to construct Points for any of the Rectangle's four corners.

// Get Rectangle for second column in second row.
var cellRectangle = dataGridView1.GetCellDisplayRectangle(1, 1, true);
// Can create Points using the Rectangle if you want.
Console.WriteLine("Top Left     x:{0}\t y:{1}", cellRectangle.Left, cellRectangle.Top);
Console.WriteLine("Bottom Right x:{0}\t y:{1}", cellRectangle.Right, cellRectangle.Bottom);

But I agree with your question's commenters; it would be better to create a custom DataGridViewColumn and host your TextBox and Button there. Here's an example of doing this for the DateTimePicker control: