How to add new row(s) in a databound datagridview in C# WinA

Question

Hiii Members,

I am working on a C# WinApp. In a form there are two ComboBoxes and one DataGridView. the first ComboBox contains customer names, the second ComboBox contains products (fruits, vegitables, house holds etc). I have wrote a code that some customers have pre-added products saved in a DataTable so, when I select the customer's name from ComboBox, the pre-saved products automatically loads into the DataGridView.

 

problem is when I try to add a new product for the customer, system throws error, "ColumnCount property cannot be set on a data-bound DataGridView control."

 

when remove the ColumnCount property, it throws another error, "Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound."

 

I have googled many times but no solution working for me. DataGridView.DataSource = null; will not work because I want to add more row in existing (pre-loaded) list.

 

Please show me anyway to add a row in a databound datagridview C# WinApp.

 

Thanks

 

Mayank Jani