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PODataGridView throwing "InvalidOperationException: Operation is not valid..." when adding a row
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copied!<p>I want an OpenFileDialog to come up when a user clicks on a cell, then display the result in the cell.</p> <p>It all works, except that the DataGridView displays an extra row, for adding values to the list it's bound to. The row shows up if <code>dataGridView.AllowUserToAddNewRows == true</code>, which is what I want. What I don't want is for the application to crash when that row is edited programatically; instead, it should do exactly what it would do if the user had edited that row manually (add the new row to the underlying list, push another empty row onto the grid for adding values).</p> <p>I read about SendKeys.Send(), which should make the DataGridView behave exactly as though the user had typed the value in; however, it does not work either. Here is what I am trying:</p> <pre><code>if (openFileDialog1.ShowDialog() == DialogResult.OK) { dataGridView1.CurrentCell = cell; //simply doing a cell.Value = etc. will cause the program to crash cell.ReadOnly = false; dataGridView1.Columns[cell.ColumnIndex].ReadOnly = false; dataGridView1.EditMode = DataGridViewEditMode.EditOnEnter; dataGridView1.BeginEdit(true); SendKeys.Send(openFileDialog1.FileName + "{Enter}"); dataGridView1.EndEdit(); cell.ReadOnly = true; dataGridView1.Columns[cell.ColumnIndex].ReadOnly = true; } //I would expect the FileName would be in the cell now, and a new empty //row tacked onto the end of the DataGridView, but it's not; the DataGridView //is not changed at all. </code></pre>

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