fix for The state information is invalid for this page and might be corrupted Error

This error suggests that  the Viewstate information between postback are not same after first postback so when you click on a page's any server control , it will give this error.
Problem :You might have embedded a page which contains "runat= "server"  within a Masterpage.
For example f you have a placed jquery tabs in master page and jquery tabs pointing to an aspx page with

  attribute it will give this error.
Workaround:
Just remove "runat=server" from
tag in calling page .It will fix the error.

Fix for URL Rewriting With Intelligencia dll and IIS 5.1 Problem

If  a rewritten URL contains GUID( where Guid is encrypted in this example) and extra under  Intelligencia rewriter  and  IS 5.1 or IIS 6 ,  Request.QueryString["guid"]   will always read guid+ extra querystring.

For Example we have a following  rewritten URL.

http://somesite.com/myeSite/Preview/0t40f6ArIZYKk%2b70AceKoNQOJJucjXLwdwGjTXE4owz77cKhwsI%2bQ78TE8jLZmNUayRTO8YjzwltiHfP%2bqIYfQ%3d%3d/Intellgencia-and-URL-rewriting

Though URL have been  precisely configured  in web.config as

<rewrite url="/mysite/Preview/(.+)" to="/mysite/Preview.aspx? guid =$1">rewrite>

However, Request.QueryString["guid”] will always read this URL as

/0t40f6ArIZYKk/2b70AceKoNQOJJucjXLwdwGjTXE4owz77cKhwsI/2bQ78TE8jLZmNUayRTO8YjzwltiHfP2bqIYfQ##/Intellgencia-and-URL-rewriting

To fix this problem so that Request.QueryString["guid"] gets only Guid part of the URL, place .aspx extension with URL in web.config.

<rewrite url="/mysite/Preview/(.+).aspx" to="/mysite/Preview.aspx? guid =$1">rewrite>

And in code,  place.aspx extension with URL.

http://somesite.com/myeSite/Preview/guid.aspx/extraquerystring

 this will generate URL as

http://somesite.com/myeSite/Preview/0t40f6ArIZYKk%2b70AceKoNQOJJucjXLwdwGjTXE4owz77cKhwsI%2bQ78TE8jLZmNUayRTO8YjzwltiHfP%2bqIYfQ%3d%3d.aspx/Intellgencia-and-URL-rewriting

and now Request.QueryString["guid”] will read only guid

Books for MONO Cross platform development using C#

I just came across this book and found it interesting.The book is about cross platform development using open source MONO and C#.

# Practical Mono

Practical Mono

# Quick-> Concise->Practical Mono

Mono sams

Applications can also be developed for iphone.

ASP.NET Forms Authentication:Padding is Invalid and can not be removed Error.

I was getting this error using

FormsAuthenticationTicket ticket =

FormsAuthentication.Decrypt(authCookie.Value);

.I was trying Forms authentication to pass encrypted ticket between two web applications.I left out section with following configurations:

<machineKey

validationKey="AutoGenerate,IsolateApps"

decryptionKey="AutoGenerate,IsolateApps"

validation="AES"

decryption="Auto" />

This configuration means to create different key for each web applications thus it failed as

 encrypted key was not same in two web applications.



so how to get same key for forms authentication. I resolved this issue by setting static values in section in both web.config files.

<machineKey validationKey='B5D752F96C1196D2A98014A3EF96F35192183FA47D467ACF0969F3687EC3C6BA3A959CD85BD3C282F2390B220ACD742568A8BC36BDBFBF9306ED807E6B090D56' decryptionKey='4BE38697FCD33A2C61D8FC93754FA668CEE4B5467B6B81F6' validation='SHA1'/>

Validation and decryption were generated using online machinekey generator tool.

"Control can not be created because visual studio can not find the controls 's type in control assembly"

This error message was suddenly popping up in visual studio when I tried to drag my custom web control on a web page then tried to compile the code and found two main error messages in error list. Some thing like
"only one section per config file is allowed" since I had just added ajax configuration to web.config file like

<httpModules >

<add type="URLRewrite" name="URLRewrite" />

<httpHandlers>

<add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>

<add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="false"/>

>

<httpModules>

<add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>

httpmodule tag has been declared twice in web.config.

Solution:

merge two httpModules tags in one tag.

<httpModules>

<add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>

<add type="URLRewrite" name="URLRewrite" />

These two sections of httpmodules in web.config were causing this error.