ASP.Net State Management
State Management
1. Hidden Tags
2. Request variable
3. Cookies
4. URL Rewriting default.aspx?session= Session.SessionID
5. Session Tracking : match Session.SessionID
1. Hidden Tags
2. Request variable
3. Cookies
4. URL Rewriting default.aspx?session= Session.SessionID
5. Session Tracking : match Session.SessionID
Cookies: If enabled in browser then work Eg:
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim ck As New HttpCookie("myCookie", "vinod")
Dim d As New Date
d.AddDays(1)
ck.Expires = d 'persist for 1 day
Response.Cookies.Add(ck)
Response.Redirect("cookie2.aspx")
End Sub
In cookies2.aspx access it like this:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not Request.Cookies.Item("myCookie") Is Nothing Then
Response.Write(Request.Cookies.Item("myCookie").Name)
Response.Write(Request.Cookies.Item("myCookie").Value)
Response.Write(Request.Cookies.Item("myCookie").Path)
End If
End Sub
Request: Request.Form, Request.querystring, Request.Params
For Request.forms remove runat=server and add action="default4.aspx" in Form Tag
If Request.HttpMethod.Equals("Get") Then
Dim v = Request.QueryString("mode")
Else
Dim v = Request.Form("t")
End If
Tracing: Its a debugging mechanism. To enable trace Add following line in your web.config file inside system.web replace ( and ) with < and >
(trace enabled="true " pageOutput="false" requestLimit ="10" traceMode="SortByTime "/)
pageOutput="True" if wanna show trace at client else use http:\url\trace.axd on server to get trace detail. It also show server variables detail in bottom.
Protected Sub Button2_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button2.Click
Trace.Write("Trace Method")
Try
Dim i, j, k
i = 10
k = 0
j = i / k
Catch ex As Exception
Trace.Warn(e.ToString)
End Try
End Sub
-Vinod Kotiya
www.vinodkotiya.com
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