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1. imports namesapce in class
using System.Data.SqlClient;
2. create a function in that class which retrun sqlConnection
public static SqlConnection Connection()
{
string connectionString = "Data Source=sandeepss-PC;database=Development;user=sa;password=knowdev";
SqlConnection con = new SqlConnection();
con.ConnectionString = connectionString;
return con;
}
3 create a function which return all login names in a data Table
public static DataTable getUserLogin()
{
DataTable dt = new DataTable();
SqlConnection con = Connection();
SqlCommand cmd = new SqlCommand();
cmd.CommandText = "select userLogin from tbl_login";
cmd.Connection = con;
con.Open();
SqlDataReader reader = cmd.ExecuteReader();
dt.Load(reader);
return dt;
}