Interested to Buy Any Domain ? << Click Here >> for more details...
How to call the SQL commands asynchronously in ADO.NET
version 2.0
- 4 Answers
- 14069 Views
- DELL, I also Faced
- E-Mail Answers
Answer Posted / kiran
This is the sample code which tells asynchronous access
<%@ Page Language="C#" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<%@ Import Namespace="System.Configuration" %>
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
{
SqlConnection DBCon;
SqlCommand Command = new SqlCommand();
SqlDataReader OrdersReader;
IAsyncResult ASyncResult;
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();
// Starting the asynchronous processing
ASyncResult = Command.BeginExecuteReader();
// This loop with keep the main thread waiting
until the
// asynchronous process is finished
while (!ASyncResult.IsCompleted)
{
// Sleeping current thread for 10 milliseconds
System.Threading.Thread.Sleep(10);
}
// Retrieving result from the asynchronous process
OrdersReader = Command.EndExecuteReader
(ASyncResult);
// Displaying result on the screen
gvOrders.DataSource = OrdersReader;
gvOrders.DataBind();
// Closing connection
DBCon.Close();
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>The Poll Approach</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:GridView ID="gvOrders" runat="server"
AutoGenerateColumns="False" Width="100%">
<Columns>
<asp:BoundField HeaderText="Company Name"
DataField="CompanyName"></asp:BoundField>
<asp:BoundField HeaderText="Contact Name"
DataField="ContactName"></asp:BoundField>
<asp:BoundField HeaderText="Order Date"
DataField="orderdate"
DataFormatString="{0:d}"></asp:BoundField>
<asp:BoundField HeaderText="Required Date"
DataField="requireddate"
DataFormatString="{0:d}"></asp:BoundField>
<asp:BoundField HeaderText="Shipped Date"
DataField="shippeddate"
DataFormatString="{0:d}"></asp:BoundField>
</Columns>
</asp:GridView>
</div>
</form>
</body>
</html>
| Is This Answer Correct ? | 3 Yes | 1 No |
Post New Answer View All Answers
What is defaultview in datatable?
What is difference in record set and dataset?
How to perform sorting on a table in ADO.NET?
What is namespace in ado.net?
What is data reader in ado.net?
Describe datareader object of ado.net with example.
What are ado.net objects?
How do we use stored procedure in ADO.NET and how do we provide parameters to the stored procedures?
how Sequence to connect and retrieve data from database using dataset?
What are the ado.net components?
What provider ado.net use by default? Explain the role of data provider in ado.net? What is the role of data provider in ado.net?
How to create dynamic gridview?
Explain the difference in an abstract class and an interface?
Which one of the following objects is a high-level abstraction of the connection and command objects in ado.net?
What is the difference between an ADO.NET Dataset and an ADO Recordset?
