The-Poll-approach-of-working-with-asynchronous-commands-VB


            <%@ Page Language="VB" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<%@ Import Namespace="System.Configuration" %>

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) 
        Dim DBCon As SqlConnection
        Dim Command As SqlCommand = New SqlCommand()
        Dim OrdersReader As SqlDataReader
        Dim ASyncResult As IAsyncResult
        DBCon = New SqlConnection()
        DBCon.ConnectionString = ConfigurationManager.ConnectionStrings("DSN_NorthWind").ConnectionString
        Command.CommandText = "SELECT TOP 5 Customers.CompanyName, Customers.ContactName, " & _
                " Orders.OrderID, Orders.OrderDate, " & _
                " Orders.RequiredDate, Orders.ShippedDate " & _
                " FROM Orders, Customers " & _
                " WHERE Orders.CustomerID = Customers.CustomerID " & _
                " ORDER BY Customers.CompanyName, Customers.ContactName "
        Command.CommandType = CommandType.Text
        Command.Connection = DBCon
        DBCon.Open()
        ASyncResult = Command.BeginExecuteReader()
        While Not ASyncResult.IsCompleted
            System.Threading.Thread.Sleep(10)
        End While
        OrdersReader = Command.EndExecuteReader(ASyncResult)
        gvOrders.DataSource = OrdersReader
        gvOrders.DataBind()
        DBCon.Close()
    End Sub



    The Poll Approach


    
    
                        AutoGenerateColumns="False" Width="100%">
    
                    DataField="CompanyName">
                    DataField="ContactName">
                    DataField="orderdate" DataFormatString="{0:d}">
                    DataFormatString="{0:d}">
                    DataFormatString="{0:d}">
    
    
    

    


File: Web.config

  
                     connectionString="Data Source=localhost\SQLEXPRESS;Initial Catalog=Northwind;Integrated Security=True"
             providerName="System.Data.SqlClient" />
ADO Net Database ASP.Net Tutorial
