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 on sub form. But, when I change some values on sub form and save them to be replaces in grid the error comes to me: Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound . What is cause of this error and how to overcome this.

Answer 1

The cause is that "Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound". It is as clear as crystalline water

The solution ? Do not add rows to the DataGridView's rows collection, add them to the underlying datasource collection (the collection you are setting in to the DataSource property of the DataGridView)

Answer 2

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();

Answer 3

I had the same problem and I found solution.

//create datatable and columns
DataTable dtable = new DataTable();
dtable.Columns.Add(new DataColumn("Column 1"));
dtable.Columns.Add(new DataColumn("Column 2"));

//simple way create object for rowvalues here i have given only 2 add as per your requirement
object[] RowValues = { "", "" };

//assign values into row object
RowValues[0] = "your value 1";
RowValues[1] = "your value 2";

//create new data row
DataRow dRow;
dRow = dtable.Rows.Add(RowValues);
dtable.AcceptChanges();

//now bind datatable to gridview... 
gridview.datasource=dtable;
gridview.databind();

Source: http://www.codeproject.com/Questions/615379/Adding-rows-to-datagridview-with-existing-columns