ASP.NET

Datagrid edit command textbox reference

11-May-09 16:27

I would suggest Web development[^] forum as your question has nothing to do with ASP.NET.

Navaneeth

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janetb9911-May-09 4:34

janetb99

11-May-09 4:34

I'm trying to replace some text in a datagrid's textbox on edit. I've done this a thousand times, but I'm not seeing the problem. Stops on "tada" line with Object reference not set to an instance of an object. Any help appreciated.

Protected Sub dgAnswers_ItemCommand(ByVal source As Object, ByVal e As System.Web.UI.WebControls.DataGridCommandEventArgs) Handles dgAnswers.ItemCommand

If e.CommandName = "Edit" Then dgAnswers.EditItemIndex = e.Item.ItemIndex CType(dgAnswers.Items(e.Item.ItemIndex).FindControl("txtAnsEdit"), TextBox).Text = "tada"

Re: Datagrid edit command textbox reference

uoods11-May-09 9:04

uoods

11-May-09 9:04

I think you should break your statements into different parts. Do you feel pressured to stick all those functions on one single line? Doing this will allow you to see the problem more quickly, fix it and move on. This example probably has bugs in it, but try something like this:

If e.CommandName = "Edit" Then
   dgAnswers.EditItemIndex = e.Item.ItemIndex
   Dim txt as Textbox
   txt = CType(dgAnswers.Items(e.Item.ItemIndex).FindControl("txtAnsEdit"),TextBox)
   If not isnothing(txt) then
      'since you have the object reference assigned to txt, assign the value using this alias
      txt.Text = "tada"
   Else
      'Could not find the textbox.
   End if
End If

ASP.NET Login & Sessions question (related to not using built-in MSSQL roles & Web Administration) : repost.

EliottA11-May-09 2:50

EliottA

11-May-09 2:50

I want to create my own Users / admin tables with various information, and most to all articles, including both asp.net books I read all revolve around MSSQL Web Site Administration Tool, which for some reason or another I find to restrictive for my purposes.

I want to know pretty much, based on I have a registration script working, how to make a login which uses my own tables in my database. My login stored procedure compares a username and a hashed password and returns a count, 0 being obviously an inexistent or invalid combination.

So how would I go about making a login script and creating a session? If you choose to post snippets of code, VB.NET and C# is what I am capable of understanding, I'm using VS2008 and MSSQL 2005.

Just for a side question, none of the articles where all to helpful or descriptive on restricting sections of a website (or in my case, whole directories) to certain usergroups. Any detailed explanation or even pointing me to a website would be great. I don't want full code, and this is absolutely not urgent, I'm capable of waiting for an answer as there are other things to be done while waiting on this. If you took a look at all this, thanks in advance. I tried to be as descriptive as possible.

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Re: ASP.NET Login & Sessions question (related to not using built-in MSSQL roles & Web Administration) : repost.

N a v a n e e t h11-May-09 3:33

Re: ASP.NET Login & Sessions question (related to not using built-in MSSQL roles & Web Administration) : repost.

11-May-09 3:33

EliottA wrote:
So how would I go about making a login script and creating a session?

I am not sure that I got your question correctly. Are you asking how to validate the user login and create a session for user? If yes, that sounds pretty trivial.

You have to classify the types of users and restriction levels required in your website. Assuming you have two kinds of users, a normal user and administrators. Create a class that derives from System.Web.UI.Page, say WebPage. Since you have two types of restriction levels, create two classes NormalUserPage and AdminPage both derived from WebPage and contains security checking for each type.

If a page in your website has normal user access rights, derive the page from NormalUserPage . If it requires administrator rights, derive from AdminPage. This method helps you to add/remove certain user types with minimal code change.

Is that what you are looking for?

Smile | :)

Navaneeth

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EliottA11-May-09 3:59

EliottA

11-May-09 3:59

Thanks for the help, yes that's pretty much what I was looking for description wise. But how to create a session and keep track of it is more of what I was looking for, also while using the Web.config to restrict users from areas of the site based off their permission or role.

N a v a n e e t h wrote:
If yes, that sounds pretty trivial.

That's because I'm a beginner, stuck on a trivial part Smile | :)

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Re: ASP.NET Login & Sessions question (related to not using built-in MSSQL roles & Web Administration) : repost.

N a v a n e e t h11-May-09 16:24

"threat was being aborted" error [modified]

11-May-09 16:24

I have explained few techniques to manage session on Beginners Introduction to State Management Techniques in ASP.NET[^]. Let me know if you face any issue.

Navaneeth

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priya1515s11-May-09 2:50

priya1515s

11-May-09 2:50

Hey friends! I m a regular viewer of CODEPROJECT. I m designing an application for a software firm. In Login form , during (Response.redirect) an error is encounterd saying that"Threat was being aborted."
I tried
"server.transfer(url,false)"
"response.redirect(url,false)"

but it does not redirect to the target link instead it stays back to the current page.please help me out.
THanks in advance. Frown | :(

modified on Monday, May 11, 2009 8:57 AM

Colin Angus Mackay11-May-09 2:59

11-May-09 2:59

The ThreadAbortException is normal for a page redirect. It isn't an error.

If you are catching exceptions, you must allow this one through.

try
{
    // My code that does a redirect
}
catch(ThreadAbortException)
{
    throw; // Continue throwing the ThreadAbortException
}
catch(Exception ex)
{
    // Catch any other type of exception and handle the error.
}

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N a v a n e e t h11-May-09 3:06

11-May-09 3:06

Colin Angus Mackay wrote:
throw; // Continue throwing the ThreadAbortException

I think this is not required as ThreadAbortException will be raised again automatically at the end of catch block.

Navaneeth

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Colin Angus Mackay11-May-09 3:10

11-May-09 3:10

N a v a n e e t h wrote:
I think this is not required as ThreadAbortException will be raised again automatically at the end of catch block.

Really? Anyway, if you are catching other exceptions where the scope includes ThreadAbortException, you don't want to be processing stuff unnecessarily.

Man who stand on hill with mouth open wait long time for roast duck to drop in

N a v a n e e t h11-May-09 3:17

11-May-09 3:17

Colin Angus Mackay wrote:
Really?

Yup. Quoting MSDN,

ThreadAbortException is a special exception that can be caught, but it will automatically be raised again at the end of the catch block. When this exception is raised, the runtime executes all the finally blocks before ending the thread.

Navaneeth

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priya1515s11-May-09 3:07

priya1515s

11-May-09 3:07

thanks, but it's not working. Sigh | :sigh:

Colin Angus Mackay11-May-09 3:10

11-May-09 3:10

priya1515s wrote:
but it's not working.

Define "not working" - I'm not a mind reader.

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Colin Angus Mackay11-May-09 3:03

11-May-09 3:03

priya1515s wrote:
but it does not redirect to the target link instead it stays back to the current page.please help me out.

It may be possible that you are catching and suppressing this exception, thus not allowing it to continue up to the top to allow ASP.NET to handle it.

Man who stand on hill with mouth open wait long time for roast duck to drop in