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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="ObjectDataSourceParameters.aspx.cs"  Inherits="ObjectDataSourceParameters" %>



    Untitled Page


    
    

                                      runat="server" 
                              SelectMethod="GetEmployees"
                              TypeName="EmployeeDB"/>
                                      runat="server" 
                              SelectMethod="GetEmployee"
                              TypeName="EmployeeDB" 
                              OnSelecting="sourceEmployee_Selecting">
                
                                                              Name="employeeID" 
                                          PropertyName="SelectedValue" />
                
            
                             runat="server" 
                     DataSourceID="sourceEmployeesList" 
                     DataTextField="EmployeeID"
                     Width="131px" 
                     AutoPostBack="True" 
                     Height="171px"/>
                                 runat="server" 
                         AutoGenerateRows="False" 
                         BorderStyle="Groove"
                         BorderWidth="2px" 
                         CellPadding="4" 
                         DataSourceID="sourceEmployee" 
                         Font-Names="Verdana"
                         Font-Size="Small" 
                         ForeColor="#333333" 
                         GridLines="None" 
                         Height="50px" 
                         Width="125px">
            
            
            
            
            
            
                
                
                
                
            
            
            
        
         

    


File: ObjectDataSourceParameters.aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class ObjectDataSourceParameters : System.Web.UI.Page
{
  protected void sourceEmployee_Selecting(object sender, ObjectDataSourceSelectingEventArgs e)
  {
    if (e.InputParameters["employeeID"] == null) e.Cancel = true;
  }
}
File: Web.config


  
  
    
  
  

File: EmployeeDB.cs
using System;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Web.Configuration;
using System.Collections;
public class EmployeeDetails
{
  private int employeeID;
  private string firstName;
  private string lastName;
  private string titleOfCourtesy;
  public int EmployeeID
  {
    get {return employeeID;}
    set {employeeID = value;}
  }
  public string FirstName
  {
    get {return firstName;}
    set {firstName = value;}
  }
  public string LastName
  {
    get {return lastName;}
    set {lastName = value;}
  }
  public string TitleOfCourtesy
  {
    get {return titleOfCourtesy;}
    set {titleOfCourtesy = value;}
  }
  public EmployeeDetails(int employeeID, string firstName, string lastName,
    string titleOfCourtesy)
  {
    this.employeeID = employeeID;
    this.firstName = firstName;
    this.lastName = lastName;
    this.titleOfCourtesy = titleOfCourtesy;
  }
  public EmployeeDetails(){}
}
public class EmployeeDB
{
  private string connectionString;
  public EmployeeDB()
  {
    connectionString = WebConfigurationManager.ConnectionStrings["Northwind"].ConnectionString;
  }
  public EmployeeDB(string connectionString)
  {
    this.connectionString = connectionString;
  }
  public int InsertEmployee(EmployeeDetails emp)
  {
    SqlConnection con = new SqlConnection(connectionString);
    SqlCommand cmd = new SqlCommand("InsertEmployee", con);
    cmd.CommandType = CommandType.StoredProcedure;
    cmd.Parameters.Add(new SqlParameter("@FirstName", SqlDbType.NVarChar, 10));
    cmd.Parameters["@FirstName"].Value = emp.FirstName;
    cmd.Parameters.Add(new SqlParameter("@LastName", SqlDbType.NVarChar, 20));
    cmd.Parameters["@LastName"].Value = emp.LastName;
    cmd.Parameters.Add(new SqlParameter("@TitleOfCourtesy", SqlDbType.NVarChar, 25));
    cmd.Parameters["@TitleOfCourtesy"].Value = emp.TitleOfCourtesy;
    cmd.Parameters.Add(new SqlParameter("@EmployeeID", SqlDbType.Int, 4));
    cmd.Parameters["@EmployeeID"].Direction = ParameterDirection.Output;
  
    try 
    {
      con.Open();
      cmd.ExecuteNonQuery();
      return (int)cmd.Parameters["@EmployeeID"].Value;
    }
    catch (SqlException err) 
    {
      throw new ApplicationException("Data error.");
    }
    finally 
    {
      con.Close();      
    }
  }
  public void UpdateEmployee(EmployeeDetails emp)
  {
    SqlConnection con = new SqlConnection(connectionString);
    SqlCommand cmd = new SqlCommand("UpdateEmployee", con);
    cmd.CommandType = CommandType.StoredProcedure;
    cmd.Parameters.Add(new SqlParameter("@FirstName", SqlDbType.NVarChar, 10));
    cmd.Parameters["@FirstName"].Value = emp.FirstName;
    cmd.Parameters.Add(new SqlParameter("@LastName", SqlDbType.NVarChar, 20));
    cmd.Parameters["@LastName"].Value = emp.LastName;
    cmd.Parameters.Add(new SqlParameter("@TitleOfCourtesy", SqlDbType.NVarChar, 25));
    cmd.Parameters["@TitleOfCourtesy"].Value = emp.TitleOfCourtesy;
    cmd.Parameters.Add(new SqlParameter("@EmployeeID", SqlDbType.Int, 4));
    cmd.Parameters["@EmployeeID"].Value = emp.EmployeeID;
    try
    {
      con.Open();
      cmd.ExecuteNonQuery();
    }
    catch (SqlException err)
    {
      throw new ApplicationException("Data error.");
    }
    finally
    {
      con.Close();
    }
  }
  public void UpdateEmployee(int EmployeeID, string firstName, string lastName, string titleOfCourtesy)
  {
    SqlConnection con = new SqlConnection(connectionString);
    SqlCommand cmd = new SqlCommand("UpdateEmployee", con);
    cmd.CommandType = CommandType.StoredProcedure;
    cmd.Parameters.Add(new SqlParameter("@FirstName", SqlDbType.NVarChar, 10));
    cmd.Parameters["@FirstName"].Value = firstName;
    cmd.Parameters.Add(new SqlParameter("@LastName", SqlDbType.NVarChar, 20));
    cmd.Parameters["@LastName"].Value = lastName;
    cmd.Parameters.Add(new SqlParameter("@TitleOfCourtesy", SqlDbType.NVarChar, 25));
    cmd.Parameters["@TitleOfCourtesy"].Value = titleOfCourtesy;
    cmd.Parameters.Add(new SqlParameter("@EmployeeID", SqlDbType.Int, 4));
    cmd.Parameters["@EmployeeID"].Value = EmployeeID;
    try
    {
      con.Open();
      cmd.ExecuteNonQuery();
    }
    catch (SqlException err)
    {
      throw new ApplicationException("Data error.");
    }
    finally
    {
      con.Close();
    }
  }
  public void DeleteEmployee(int employeeID)
  {
    SqlConnection con = new SqlConnection(connectionString);
    SqlCommand cmd = new SqlCommand("DeleteEmployee", con);
    cmd.CommandType = CommandType.StoredProcedure;
    cmd.Parameters.Add(new SqlParameter("@EmployeeID", SqlDbType.Int, 4));
    cmd.Parameters["@EmployeeID"].Value = employeeID;
      
    try 
    {
      con.Open();
      cmd.ExecuteNonQuery();
    }
    catch (SqlException err) 
    {
      throw new ApplicationException("Data error.");
    }
    finally 
    {
      con.Close();      
    }
  }
  public EmployeeDetails GetEmployee(int employeeID)
  {
    SqlConnection con = new SqlConnection(connectionString);
    SqlCommand cmd = new SqlCommand("GetEmployee", con);
    cmd.CommandType = CommandType.StoredProcedure;
    cmd.Parameters.Add(new SqlParameter("@EmployeeID", SqlDbType.Int, 4));
    cmd.Parameters["@EmployeeID"].Value = employeeID;
        
    try 
    {
      con.Open();
      SqlDataReader reader = cmd.ExecuteReader(CommandBehavior.SingleRow);
      
      reader.Read();
      EmployeeDetails emp = new EmployeeDetails(
        (int)reader["EmployeeID"], (string)reader["FirstName"],
        (string)reader["LastName"], (string)reader["TitleOfCourtesy"]);
      reader.Close();
      return emp;
    }
    catch (SqlException err) 
    {
      throw new ApplicationException("Data error.");
    }
    finally 
    {
      con.Close();      
    }
  }
  public EmployeeDetails[] GetEmployees()
  {
    SqlConnection con = new SqlConnection(connectionString);
    SqlCommand cmd = new SqlCommand("GetAllEmployees", con);
    cmd.CommandType = CommandType.StoredProcedure;
        
    ArrayList employees = new ArrayList();
    try 
    {
      con.Open();
      SqlDataReader reader = cmd.ExecuteReader();
      while (reader.Read())
      {
        EmployeeDetails emp = new EmployeeDetails(
          (int)reader["EmployeeID"], (string)reader["FirstName"],
          (string)reader["LastName"], (string)reader["TitleOfCourtesy"]);
        employees.Add(emp);
      }
      reader.Close();
      
      return (EmployeeDetails[])employees.ToArray(typeof(EmployeeDetails));
    }
    catch (SqlException err) 
    {
      throw new ApplicationException("Data error.");
    }
    finally 
    {
      con.Close();      
    }
  }
      
  public int CountEmployees()
  {
    SqlConnection con = new SqlConnection(connectionString);
    SqlCommand cmd = new SqlCommand("CountEmployees", con);
    cmd.CommandType = CommandType.StoredProcedure;
        
    try 
    {
      con.Open();
      return (int)cmd.ExecuteScalar();
    }
    catch (SqlException err) 
    {
      throw new ApplicationException("Data error.");
    }
    finally 
    {
      con.Close();      
    }
  }
}