How to save data by OledbCommandBuilder

Question

Sir, 

 

 

I face this problem when Save data by OleDbCommandBuilder. 

 

Dynamic SQL generation for the UpdateCommand is not supported against a SelectCommand that does not return any key column information. 

 

My code here

 

OleDbCommandBuilder cb = new OleDbCommandBuilder(da);

da.Update(ds);

MessageBox.Show("Test");