Csharp/C Sharp/Database ADO.net/Store Procedure

Add parameters to SqlCommand to call stored procedure

 
using System;
using System.Data;
using System.Data.SqlClient;
class ExecuteAddProduct3 {
    public static void Main() {
        SqlConnection mySqlConnection = new SqlConnection("server=localhost;database=Northwind;uid=sa;pwd=sa");
        mySqlConnection.Open();
        SqlCommand mySqlCommand = mySqlConnection.CreateCommand();
        mySqlCommand.rumandText =
          "EXECUTE @MyProductID = AddProduct @MyProductName, " +
          "@MySupplierID, @MyCategoryID, @MyQuantityPerUnit, " +
          "@MyUnitPrice, @MyUnitsInStock, @MyUnitsOnOrder, " +
          "@MyReorderLevel, @MyDiscontinued";
        mySqlCommand.Parameters.Add("@MyProductID", SqlDbType.Int);
        mySqlCommand.Parameters["@MyProductID"].Direction = ParameterDirection.Output;
        mySqlCommand.Parameters.Add("@MyProductName", SqlDbType.NVarChar, 40).Value = "Widget";
        mySqlCommand.Parameters.Add("@MySupplierID", SqlDbType.Int).Value = 1;
        mySqlCommand.Parameters.Add("@MyCategoryID", SqlDbType.Int).Value = 1;
        mySqlCommand.Parameters.Add("@MyQuantityPerUnit", SqlDbType.NVarChar, 20).Value = "1 per box";
        mySqlCommand.Parameters.Add("@MyUnitPrice", SqlDbType.Money).Value = 5.99;
        mySqlCommand.Parameters.Add("@MyUnitsInStock", SqlDbType.SmallInt).Value = 10;
        mySqlCommand.Parameters.Add("@MyUnitsOnOrder", SqlDbType.SmallInt).Value = 5;
        mySqlCommand.Parameters.Add("@MyReorderLevel", SqlDbType.SmallInt).Value = 5;
        mySqlCommand.Parameters.Add("@MyDiscontinued", SqlDbType.Bit).Value = 1;
        SqlDataReader mySqlDataReader = mySqlCommand.ExecuteReader();
        while (mySqlDataReader.Read()) {
            Console.WriteLine("mySqlDataReader[\" ProductName\"] = " + mySqlDataReader["ProductName"]);
            Console.WriteLine("mySqlDataReader[\" UnitPrice\"] = " + mySqlDataReader["UnitPrice"]);
        }
        mySqlDataReader.Close();
        Console.WriteLine("New ProductID = " + mySqlCommand.Parameters["@MyProductID"].Value);
        mySqlConnection.Close();
    }
}

Call a store procedure

//Call a store procedure
/*
 * C# Programmers Pocket Consultant
 * Author: Gregory S. MacBeth
 * Email: gmacbeth@comporium.net
 * Create Date: June 27, 2003
 * Last Modified Date:
 * Version: 1
 */
using System;
using System.Data;
using System.Data.SqlClient;
namespace Client.Chapter_13___ADO.NET
{
    public class Callastoreprocedure
    {
        static void Main(string[] args)
        {
            SqlConnection cn = new SqlConnection(
            "Data Source=(local); Initial  Catalog = MyDatabase; User ID=sa;Password=");
            SqlCommand cmd = new SqlCommand("MyStoredProcedure", cn);
            cmd.rumandType = CommandType.StoredProcedure;
            SqlParameter param = new SqlParameter("@ReturnValue", SqlDbType.Int);
            cmd.Parameters.Add(param);
            cmd.Parameters.Add("MyFirstParameter", SqlDbType.Int);
            cmd.Parameters.Add("MySecondParameter", SqlDbType.Int).Direction =
            ParameterDirection.Output;
            SqlDataAdapter da = new SqlDataAdapter(cmd);
            
        }
    }
}

Call Simple Store Procedure

using System;
using System.Data.SqlClient;
using System.Data.OleDb;
using System.Data;
class Class1 {
   static void Main(string[] args) {
    SqlConnection cnnUserMan;
    SqlCommand cmmUser;
    object objNumUsers;
    // Instantiate and open the connection
    cnnUserMan = new SqlConnection("server=(local)\\SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI");
    cnnUserMan.Open();
    // Instantiate and initialize command
    cmmUser = new SqlCommand("SimpleStoredProcedure", cnnUserMan);
    cmmUser.rumandType = CommandType.StoredProcedure;
    objNumUsers = cmmUser.ExecuteScalar();
    Console.WriteLine(objNumUsers.ToString());
   }
}

Call the SQL Server AddProduct() stored procedure with SqlCommand

 
using System;
using System.Data;
using System.Data.SqlClient;
class ExecuteAddProduct {
    public static void Main() {
        SqlConnection mySqlConnection = new SqlConnection("server=localhost;database=Northwind;uid=sa;pwd=sa");
        mySqlConnection.Open();
        SqlCommand mySqlCommand = mySqlConnection.CreateCommand();
        mySqlCommand.rumandText =
          "EXECUTE AddProduct @MyProductID OUTPUT, @MyProductName, " +
          "@MySupplierID, @MyCategoryID, @MyQuantityPerUnit, " +
          "@MyUnitPrice, @MyUnitsInStock, @MyUnitsOnOrder, " +
          "@MyReorderLevel, @MyDiscontinued";
        mySqlCommand.Parameters.Add("@MyProductID", SqlDbType.Int);
        mySqlCommand.Parameters["@MyProductID"].Direction = ParameterDirection.Output;
        mySqlCommand.Parameters.Add("@MyProductName", SqlDbType.NVarChar, 40).Value = "Widget";
        mySqlCommand.Parameters.Add("@MySupplierID", SqlDbType.Int).Value = 1;
        mySqlCommand.Parameters.Add("@MyCategoryID", SqlDbType.Int).Value = 1;
        mySqlCommand.Parameters.Add("@MyQuantityPerUnit", SqlDbType.NVarChar, 20).Value = "1 per box";
        mySqlCommand.Parameters.Add("@MyUnitPrice", SqlDbType.Money).Value = 5.99;
        mySqlCommand.Parameters.Add("@MyUnitsInStock", SqlDbType.SmallInt).Value = 10;
        mySqlCommand.Parameters.Add("@MyUnitsOnOrder", SqlDbType.SmallInt).Value = 5;
        mySqlCommand.Parameters.Add("@MyReorderLevel", SqlDbType.SmallInt).Value = 5;
        mySqlCommand.Parameters.Add("@MyDiscontinued", SqlDbType.Bit).Value = 1;
        mySqlCommand.ExecuteNonQuery();
        Console.WriteLine("New ProductID = " + mySqlCommand.Parameters["@MyProductID"].Value);
        mySqlConnection.Close();
    }
}

Call the SQL Server AddProduct() store procedure

using System;
using System.Data;
using System.Data.SqlClient;
class Test
{
  public static void Main()
  {
    SqlConnection mySqlConnection =new SqlConnection("server=(local)\\SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI;");
    mySqlConnection.Open();
    SqlCommand mySqlCommand = mySqlConnection.CreateCommand();
    mySqlCommand.rumandText =
      "EXECUTE AddProduct @MyProductID OUTPUT, @MyProductName, " +
      "@MySupplierID, @MyCategoryID, @MyQuantityPerUnit, " +
      "@MyUnitPrice, @MyUnitsInStock, @MyUnitsOnOrder, " +
      "@MyReorderLevel, @MyDiscontinued";
    mySqlCommand.Parameters.Add("@MyProductID", SqlDbType.Int);
    mySqlCommand.Parameters["@MyProductID"].Direction = ParameterDirection.Output;
    mySqlCommand.Parameters.Add( "@MyProductName", SqlDbType.NVarChar, 40).Value = "Widget";
    mySqlCommand.Parameters.Add( "@MySupplierID", SqlDbType.Int).Value = 1;
    mySqlCommand.Parameters.Add( "@MyCategoryID", SqlDbType.Int).Value = 1;
    mySqlCommand.Parameters.Add( "@MyQuantityPerUnit", SqlDbType.NVarChar, 20).Value = "1 per box";
    mySqlCommand.Parameters.Add( "@MyUnitPrice", SqlDbType.Money).Value = 5.99;
    mySqlCommand.Parameters.Add( "@MyUnitsInStock", SqlDbType.SmallInt).Value = 10;
    mySqlCommand.Parameters.Add( "@MyUnitsOnOrder", SqlDbType.SmallInt).Value = 5;
    mySqlCommand.Parameters.Add( "@MyReorderLevel", SqlDbType.SmallInt).Value = 5;
    mySqlCommand.Parameters.Add( "@MyDiscontinued", SqlDbType.Bit).Value = 1;
    mySqlCommand.ExecuteNonQuery();
    Console.WriteLine("New ProductID = " + mySqlCommand.Parameters["@MyProductID"].Value);
    mySqlConnection.Close();
  }
}

Get Return from SQL Server store procedure

using System;
using System.Data;
using System.Data.SqlClient;
class Test
{
  public static void Main()
  {
    SqlConnection mySqlConnection =new SqlConnection("server=(local)\\SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI;");
    mySqlConnection.Open();
    SqlCommand mySqlCommand = mySqlConnection.CreateCommand();
    mySqlCommand.rumandText =
      "EXECUTE @MyProductID = AddProduct3 @MyProductName, " +
      "@MySupplierID, @MyCategoryID, @MyQuantityPerUnit, " +
      "@MyUnitPrice, @MyUnitsInStock, @MyUnitsOnOrder, " +
      "@MyReorderLevel, @MyDiscontinued";
    mySqlCommand.Parameters.Add("@MyProductID", SqlDbType.Int);
    mySqlCommand.Parameters["@MyProductID"].Direction = ParameterDirection.Output;
    mySqlCommand.Parameters.Add("@MyProductName", SqlDbType.NVarChar, 40).Value = "Widget";
    mySqlCommand.Parameters.Add("@MySupplierID", SqlDbType.Int).Value = 1;
    mySqlCommand.Parameters.Add("@MyCategoryID", SqlDbType.Int).Value = 1;
    mySqlCommand.Parameters.Add("@MyQuantityPerUnit", SqlDbType.NVarChar, 20).Value = "1 per box";
    mySqlCommand.Parameters.Add("@MyUnitPrice", SqlDbType.Money).Value = 5.99;
    mySqlCommand.Parameters.Add("@MyUnitsInStock", SqlDbType.SmallInt).Value = 10;
    mySqlCommand.Parameters.Add("@MyUnitsOnOrder", SqlDbType.SmallInt).Value = 5;
    mySqlCommand.Parameters.Add("@MyReorderLevel", SqlDbType.SmallInt).Value = 5;
    mySqlCommand.Parameters.Add("@MyDiscontinued", SqlDbType.Bit).Value = 1;
    SqlDataReader mySqlDataReader = mySqlCommand.ExecuteReader();
    while (mySqlDataReader.Read())
    {
      Console.WriteLine("mySqlDataReader[\" ProductName\"] = " +
        mySqlDataReader["ProductName"]);
      Console.WriteLine("mySqlDataReader[\" UnitPrice\"] = " +
        mySqlDataReader["UnitPrice"]);
    }
    mySqlDataReader.Close();
    Console.WriteLine("New ProductID = " + mySqlCommand.Parameters["@MyProductID"].Value);
    mySqlConnection.Close();
  }
}

illustrates how to call a SQL Server stored procedure

/*
Mastering Visual C# .NET
by Jason Price, Mike Gunderloy
Publisher: Sybex;
ISBN: 0782129110
*/
/*
  Example23_7.cs illustrates how to call a SQL Server
  stored procedure
*/
using System;
using System.Data;
using System.Data.SqlClient;
public class Example23_7
{
  public static void Main()
  {
    // formulate a string containing the details of the
    // database connection
    string connectionString =
      "server=localhost;database=Northwind;uid=sa;pwd=sa";
    // create a SqlConnection object to connect to the
    // database, passing the connection string to the constructor
    SqlConnection mySqlConnection =
      new SqlConnection(connectionString);
    // formulate a string containing the name of the
    // stored procedure
    string procedureString =
      "Ten Most Expensive Products";
    // create a SqlCommand object to hold the SQL statement
    SqlCommand mySqlCommand = mySqlConnection.CreateCommand();
    // set the CommandText property of the SqlCommand object to
    // procedureString
    mySqlCommand.rumandText = procedureString;
    // set the CommandType property of the SqlCommand object
    // to CommandType.StoredProcedure
    mySqlCommand.rumandType = CommandType.StoredProcedure;
    // open the database connection using the
    // Open() method of the SqlConnection object
    mySqlConnection.Open();
    // run the stored procedure
    mySqlCommand.ExecuteNonQuery();
    // create a SqlDataAdapter object
    SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter();
    // set the SelectCommand property of the SqlAdapter object
    // to the SqlCommand object
    mySqlDataAdapter.SelectCommand = mySqlCommand;
    // create a DataSet object to store the results of
    // the stored procedure call
    DataSet myDataSet = new DataSet();
    // use the Fill() method of the SqlDataAdapter object to
    // retrieve the rows from the stored procedure call,
    // storing the rows in a DataTable named Products
    mySqlDataAdapter.Fill(myDataSet, "Products");
    // display the rows in the Products DataTable
    Console.WriteLine("The ten most expensive products are:");
    DataTable products = myDataSet.Tables["Products"];
    foreach (DataRow product in products.Rows)
    {
      Console.WriteLine("Product name = " +
        product["TenMostExpensiveProducts"]);
      Console.WriteLine("Unit price = " +
        product["UnitPrice"]);
    }
    // close the database connection using the Close() method
    // of the SqlConnection object
    mySqlConnection.Close();
  }
}

Illustrates simple stored procedures with unnamed parameters in the query

using System;
using System.Data;
using System.Data.OleDb;
public class Prepare {    
 public static void Main () { 
   String connect = "Provider=Microsoft.JET.OLEDB.4.0;data source=.\\Employee.mdb";
   OleDbConnection con = new OleDbConnection(connect);
   con.Open();  
   Console.WriteLine("Made the connection to the database");
   OleDbCommand cmd = con.CreateCommand();
   cmd.rumandText ="SELECT First_name FROM Employee WHERE ID = ?";
   OleDbParameter param = new OleDbParameter();
   cmd.Parameters.Add(param);
   param.Value = "01";
   OleDbDataReader reader = cmd.ExecuteReader();
   Console.WriteLine("Using a stored procedure");
   while(reader.Read()) 
     Console.WriteLine("{0}", reader.GetString(0));
   reader.Close();
   param.Value = "01";
   reader = cmd.ExecuteReader();
   Console.WriteLine("Using a stored procedure");
   while(reader.Read()) 
     Console.WriteLine("{0}", reader.GetString(0));
   reader.Close();

   con.Close();
 }
}

Populate a DataSet object using a store procedure

using System;
using System.Data;
using System.Data.SqlClient;
class PopulateDataSetUsingProcedure
{
  public static void Main()
  {
    SqlConnection mySqlConnection =new SqlConnection("server=(local)\\SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI;");
    SqlCommand mySqlCommand = mySqlConnection.CreateCommand();
    mySqlCommand.rumandText = "EXECUTE CustOrderHist @CustomerID";
    mySqlCommand.Parameters.Add("@CustomerID", SqlDbType.NVarChar, 5).Value = "ALFKI";
    SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter();
    mySqlDataAdapter.SelectCommand = mySqlCommand;
    DataSet myDataSet = new DataSet();
    mySqlConnection.Open();
    Console.WriteLine("Retrieving rows from the CustOrderHist() Procedure");
    int numberOfRows = mySqlDataAdapter.Fill(myDataSet, "CustOrderHist");
    Console.WriteLine("numberOfRows = " + numberOfRows);
    mySqlConnection.Close();
    DataTable myDataTable = myDataSet.Tables["CustOrderHist"];
    foreach (DataRow myDataRow in myDataTable.Rows)
    {
      Console.WriteLine("ProductName = " + myDataRow["ProductName"]);
      Console.WriteLine("Total = " + myDataRow["Total"]);
    }
  }
}