Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound

Question

I have a grid and when data is loaded in grid; I simply select a row and press edit button. On edit, new sub form is opened and values of row\'s cells are passed to controls

Answer 1

Add or Edit your row in DataSource of your DataGridView. Do not directly add/edit to your grid.

If your DataSource is DataSet and you want to add new row

DataSet dsTempDataTable = (DataSet)MainApplication.dgvBooksDetails.DataSource;
DataTable dt = dsTempDataTable.Tables[0]; // use table index/name to get the exact table
DataRow dr = dt.NewRow();
//  code to fill record
dt.Rows.Add(dr);

To Edit

DataSet dsTempDataTable = (DataSet)MainApplication.dgvBooksDetails.DataSource;
DataTable dt = dsTempDataTable.Tables[0]; // use table index/name to get the exact table
dt.Rows[0]["columnName"] = "some value";
// your row edit  code
dt.AcceptChanges();