Using two ObjectDataSource controls in one page : ObjectDataSource « ADO.net Database « ASP.NET Tutorial

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

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:ObjectDataSource ID="sourceEmployeesList" 
                              runat="server" 
                              SelectMethod="GetEmployees"
                              TypeName="EmployeeDB"/>
        <asp:ObjectDataSource ID="sourceEmployee" 
                              runat="server" 
                              SelectMethod="GetEmployee"
                              TypeName="EmployeeDB" 
                              OnSelecting="sourceEmployee_Selecting">
                <SelectParameters>
                    <asp:ControlParameter ControlID="lstEmployees" 
                                          Name="employeeID" 
                                          PropertyName="SelectedValue" />
                </SelectParameters>
            </asp:ObjectDataSource>
        <asp:ListBox ID="lstEmployees" 
                     runat="server" 
                     DataSourceID="sourceEmployeesList" 
                     DataTextField="EmployeeID"
                     Width="131px" 
                     AutoPostBack="True" 
                     Height="171px"/>
        <asp:DetailsView ID="DetailsView1" 
                         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">
            <FooterStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
            <CommandRowStyle BackColor="#FFFFC0" Font-Bold="True" />
            <RowStyle BackColor="#FFFBD6" ForeColor="#333333" />
            <FieldHeaderStyle BackColor="#FFFF99" Font-Bold="True" />
            <PagerStyle BackColor="#FFCC66" ForeColor="#333333" HorizontalAlign="Center" />
            <Fields>
                <asp:BoundField DataField="FirstName" HeaderText="FirstName" SortExpression="FirstName" />
                <asp:BoundField DataField="EmployeeID" HeaderText="EmployeeID" SortExpression="EmployeeID" />
                <asp:BoundField DataField="LastName" HeaderText="LastName" SortExpression="LastName" />
                <asp:BoundField DataField="TitleOfCourtesy" HeaderText="TitleOfCourtesy" SortExpression="TitleOfCourtesy" />
            </Fields>
            <HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
            <AlternatingRowStyle BackColor="White" />
        </asp:DetailsView>
         </div>
    </form>
</body>
</html>

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

<?xml version="1.0"?>
<configuration xmlns="http://schemas.microsoft.com/.NetConfiguration/v2.0">
  <appSettings/>
  <connectionStrings>
    <add name="Northwind" connectionString="Data Source=localhost;Initial Catalog=Northwind;Integrated Security=SSPI"/>
  </connectionStrings>
  
</configuration>
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();      
    }
  }
}
18.36.ObjectDataSource
	18.36.1.	Using ObjectDataSource
	18.36.2.	Using two ObjectDataSource controls in one page
	18.36.3.	ObjectDataSource binds DataBound controls such as the GridView, DetailsView, and FormView controls to a component
	18.36.4.	Bind SqlDataReader with asp:ObjectDataSource
	18.36.5.	Binding to a DataSet
	18.36.6.	asp:ObjectDataSource with UpdateParameters
	18.36.7.	Paging, Sorting, and Filtering Data with the ObjectDataSource Control
	18.36.8.	ObjectDataSource Update
	18.36.9.	ObjectDataSource Insert
	18.36.10.	Creating a Customer class to demonstrate the ObjectDataSource control (C#)
	18.36.11.	Creating a Customer class to demonstrate the ObjectDataSource control (VB)