using System;
using System.Data;
using System.Data.SqlClient;
class PropagateChanges {
static void Main(){
string connString = "server=(local)\\SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI";
string qry = @"select * from employee ";
string upd = @"update employee set firstname = @firstname where id = @id";
SqlConnection conn = new SqlConnection(connString);
try {
SqlDataAdapter da = new SqlDataAdapter();
da.SelectCommand = new SqlCommand(qry, conn);
DataSet ds = new DataSet();
da.Fill(ds, "employee");
DataTable dt = ds.Tables["employee"];
dt.Rows[0]["firstname"] = "W";
foreach (DataRow row in dt.Rows){
Console.WriteLine(
"{0} {1}",
row["firstname"].ToString().PadRight(15),
row["lastname"].ToString().PadLeft(25));
}
// Update employees
SqlCommand cmd = new SqlCommand(upd, conn);
cmd.Parameters.Add("@firstname",SqlDbType.NVarChar,15, "firstname");
SqlParameter parm = cmd.Parameters.Add("@id",SqlDbType.Int,4,"id");
parm.SourceVersion = DataRowVersion.Original;
da.UpdateCommand = cmd;
da.Update(ds, "employee");
} catch(Exception e) {
Console.WriteLine("Error: " + e);
} finally {
conn.Close();
}
}
}
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