Setting DataTable primary key [duplicate]

Question

objDataTable.Columns.Add("Student Id", typeof(int));
objDataTable.PrimaryKey = "Student Id";

am already tried many ways but i can't

in c# how to set primary key to this line , friends please help

thanks in Advance

Answer 1

Try this out :

DataTable objDataTable = new DataTable();
objDataTable.Columns.Add("Student Id", typeof(int));
objDataTable.PrimaryKey = new DataColumn[] { objDataTable.Columns["Student Id"] };

The property PrimaryKey is of Type: System.Data.DataColumn[] not string.