Update command with parameters : SqlDataAdapter : ADO.Net C# Examples

    
using  System;
using  System.Data;
using  System.Data.SqlClient;

class  MainClass
{
      static  void  Main(string[]  args)
      {
            string  connString  =  @"server  =  .\sqlexpress;integrated  security  =  true;database  =  northwind";

            string  qry  =  @"select  *  from  employees  where  country  =  'UK'";

            string  upd  =  @"update  employees  set  city  =  @city  where  employeeid  =  @employeeid";

            SqlConnection  conn  =  new  SqlConnection(connString);

            try
            {
                  SqlDataAdapter  da  =  new  SqlDataAdapter();
                  da.SelectCommand  =  new  SqlCommand(qry,  conn);

                  DataSet  ds  =  new  DataSet();
                  da.Fill(ds,  "employees");

                  DataTable  dt  =  ds.Tables["employees"];

                  dt.Rows[0]["city"]  =  "W";

                  foreach  (DataRow  row  in  dt.Rows)
                  {
                        Console.WriteLine("{0}  {1}  {2}",
                              row["firstname"].ToString().PadRight(15),
                              row["lastname"].ToString().PadLeft(25),
                              row["city"]);
                  }

                  SqlCommand  cmd  =  new  SqlCommand(upd,  conn);
                  cmd.Parameters.Add("@city",SqlDbType.NVarChar,15,"city");
                  SqlParameter  parm  =cmd.Parameters.Add("@employeeid",SqlDbType.Int,4,"employeeid");
                  parm.SourceVersion  =  DataRowVersion.Original;
                  da.UpdateCommand  =  cmd;
                  da.Update(ds,  "employees");
            }
            catch(Exception  e)  
            {
                  Console.WriteLine("Error:  "  +  e);
            }
            finally
            {
                  conn.Close();
            }
      }
}