URL Rewriting in ASP.NET with Sample Project
URL rewriting is the process of intercepting an incoming Web request and automatically redirecting it to a different URL.
To understand completely follow below link
http://msdn.microsoft.com/en-us/library/ms972974.aspx
In this article I am going make a simple example which will take only few minutes and you will learn how to achieve URL Rewriting.
I believe developer doesn’t have much time to read a complete article of 20 pages.
Here we go
Step 1
Create a table
(
POSTID INT,
TITLE VARCHAR(255),
BODY TEXT
)
CREATE TABLE TESTTABLE
Insert some dummy values
INSERT INTO TESTTABLE (POSTID,TITLE,BODY) VALUES (1,‘ACCORDIAN CONTROL WITH SQL SERVER’,
‘ACCORDIAN CONTROL WITH SQL SERVER CONNECTIVITY JOGGEE
MADE A ARTICLE AND THAT IS THE BEST I THINK SO.’)
GO
INSERT INTO TESTTABLE (POSTID,TITLE,BODY) VALUES (2,‘Mouse over effect’,
‘This is so simple and can found thousand places but I tried to make it more easier who
doesnt know the different between <asp:linked button> or anchor.’)
GO
�
SELECT * FROM TESTTABLE
STEP – 2
Create a stored procedure
Create PROCEDURE PROC_TEST
AS
BEGIN
SELECT
‘<A HREF=Detail/’+REPLACE(TITLE,‘ ‘,‘_’) +‘~’ + CONVERT(VARCHAR,POSTID) + ‘.ASPX>’ + TITLE + ‘</A>’ AS ‘TITLE’,
BODY
FROM TESTTABLE
END
GO
Procedure for Detail Page.
CREATE PROCEDURE PROC_TESTDETAIL
@ID INT
AS
BEGIN
SELECT
POSTID,
TITLE,
BODY
FROM TESTTABLE
WHERE POSTID = @ID
END
GO
Database work is finished, let move to ASP.NET project means Website Programming.
Create a Website, Ajax Enabled or not its up to you, No matter what you choose.
In a default webpage write below code. I am pasting the complete code for Default page. where i am using DataList direct binding with two field.
<@ Page Language=”VB” AutoEventWireup=”true” CodeFile=”Default.aspx.vb” Inherits=”_Default” %>
<!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>BLOG.JOGGEE</title>
</head>
<body>
<form id=”form1″ runat=”server”>
<asp:ScriptManager ID=”ScriptManager1″ runat=”server” />
<div>
<asp:DataList ID=”DataList1″ runat=”server”>
<ItemTemplate>
<table width=”100%”>
<tr>
<td><%# Container.DataItem(“Title”)%></td>
</tr>
<tr>
<td><%#Container.DataItem(“Body”)%></td>
</tr>
</table>
</ItemTemplate>
</asp:DataList></div>
</form>
</body>
</html>
In a Code Behind Past below code.
Imports System.Data.SqlClientPartial Class _Default
Inherits System.Web.UI.PageProtected
If IsPostBack = False Then
Dim sqlConn As New SqlConnection
Dim sqlCmd As New SqlCommand(“PROC_TEST”, sqlConn)
Dim objDA As New SqlDataAdapter
Dim DT As New DataTable
‘******************************************************************************************************
‘I have mentioned this connection string in the web.config Change it with appropriate values.
‘<add name=”connString” connectionString=”Data Source=”DATABASE SERVER NAME”;Initial Catalog=”DATABASE NAME”;User=”USER”;Password=”PASWORD”;”/>
‘****************************************************************************************************************
sqlConn.ConnectionString = ConfigurationManager.ConnectionStrings(“connString”).ConnectionString
‘opening a connection
sqlConn.Open()
sqlCmd.Connection = sqlConn
sqlCmd.CommandType = CommandType.StoredProcedure
objDA.SelectCommand = sqlCmd
‘populate data table
objDA.Fill(DT)
‘bind data
DataList1.DataSource = DT.DefaultView
DataList1.DataBind()
‘disposing all the declared objects.
objDA.Dispose()
objDA = Nothing
sqlConn.Close()
sqlConn = Nothing
sqlCmd.Dispose()
sqlCmd.Connection.Close()
sqlCmd = Nothing
End If
End Sub
End Class
Code for Detail WebPage.
Create a folder named “Detail” and add one more Default.aspx webpage. Please follow the instructions.
<% @ Page Language=”VB” AutoEventWireup=”false” CodeFile=”Default.aspx.vb” Inherits=”Detail_Default” %>
<! DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN” “http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd”>
<html xmlns=”http://www.w3.org/1999/xhtml” >
<head runat=”server”>
<title>Blog.Joggee</title>
</head>
<body>
<form id=”form1″ runat=”server”>
<div>
<asp:HyperLink ID=”HyperLink1″ runat=”server” NavigateUrl=”~/Default.aspx”>Back</asp:HyperLink>
<table width=”100%”>
<tr>
<td>
Title
</td>
<td>
<asp:Label ID=”lblTitle” runat=”server”></asp:Label>
</td>
</tr>
<tr>
<td style=”height: 191px” valign=”top”>
Body:
</td>
<td style=”height: 191px”>
<asp:TextBox ID=”txtBody” runat=”server” Height=”188px” TextMode=”MultiLine” Width=”975px”></asp:TextBox>
</td>
</tr>
</table>
</div>
</form>
</body>
</html>
In a Code Behind Just Copy Paste
Imports System.Data
Imports System.Data.SqlClient
Partial Class Detail_Default
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not IsPostBack Then
Dim sqlConn As New SqlConnection
Dim sqlCmd As New SqlCommand(“PROC_TESTDETAIL” , sqlConn)
Dim objDA As New SqlDataAdapter
Dim DT As New DataTable
‘Here you can specify your connection string.
sqlConn.ConnectionString = ConfigurationManager.ConnectionStrings(
“connString” ).ConnectionString
‘opening a connection
sqlConn.Open()
sqlCmd.Connection = sqlConnsqlCmd.CommandType = CommandType.StoredProcedure
sqlCmd.Parameters.Add(“@ID”, SqlDbType.Int).Value = Request.QueryString(“ID” )
objDA.SelectCommand = sqlCmd
‘populate data table
objDA.Fill(DT)
‘bind data
lblTitle.Text = DT.Rows(0)(“Title” )
txtBody.Text = DT.Rows(0)(“Body” )
‘disposing all the declared objects.
objDA.Dispose()
objDA =Nothing
sqlConn.Close()
sqlConn =Nothing
sqlCmd.Dispose()
sqlCmd.Connection.Close()
sqlCmd =Nothing
End If
End Sub
End Class
Add Global.asax file in the project on the root
<%@ Application Language=”VB” %>
<script runat=”server”>
Sub Application_Start(ByVal sender As Object, ByVal e As EventArgs)
‘ Code that runs on application startup
End Sub
Sub Application_End(ByVal sender As Object, ByVal e As EventArgs)
‘ Code that runs on application shutdown
End Sub
Sub Application_Error(ByVal sender As Object, ByVal e As EventArgs)
‘ Code that runs when an unhandled error occurs
End Sub
Sub Session_Start(ByVal sender As Object, ByVal e As EventArgs)
‘ Code that runs when a new session is started
End Sub
Sub Session_End(ByVal sender As Object, ByVal e As EventArgs)
‘ Code that runs when a session ends.
‘ Note: The Session_End event is raised only when the
‘ sessionstate mode
‘ is set to InProc in the Web.config file. If session
‘mode is set to StateServer�
‘ or SQLServer, the event is not raised.
End Sub
Protected Sub Application_BeginRequest(ByVal sender As Object, ByVal e As System.EventArgs)
Dim Old As String
Dim MovingPath As String
Dim IncomingURL As HttpContext
Dim StartingIndex As Integer
Dim ID As String
IncomingURL = HttpContext.Current
Old = IncomingURL.Request.Path
‘here you can filtered with if condition if you don’t
want any directory to be caught and redirected some where
If Regex.IsMatch(Old, “/Detail/”) Then
Old = Old.Replace(“.ASPX”, “”)
StartingIndex = Old.IndexOf(“~”)
ID = Old.Remove(0, StartingIndex + 1)
MovingPath = “~/Detail/Default.aspx?id=” + ID.ToString
IncomingURL.RewritePath(MovingPath)
End If
End Sub
</script>
In a web.config Add this key
<add name=“connString“ connectionString=“Data Source=“DATABASE SERVER NAME“;Initial Catalog=“DATABASE NAME“;User=“USER“;Password=“PASWORD“;“/>
</connectionStrings>
CLICK HERE TO DOWNLOAD THE COMPLETE SAMPLE PROJECT
Joggee