I have a few years experience developing C#, I have been asked to learn ASP.NET for a web development project. Does anyone know of any crash course tutorials to enable me to achieve this quickly, either internet or literature based?
View 2 RepliesI have a page that utilizes an IFrame to display another page within the first one. I am using ASP.NET 3.5 and when I click on a button to do a post back event, it causes Internet Explorer 7 to throw an error.
View 3 RepliesI have a page with two data bound list box controls on it. When I there is data in the controls the page crashes and i get "Internet Explorer cannot display the webpage". I have tried to set break points to see what is going on. I have tries to fill the boxes in the code behind instead of using a data source in the page. I have tried setting the page time out to 3 minutes. Nothing is working and I'm not sure what the problem is. The page works fine as long as there is no data in the controls. I'm trying to figure out what I am missing.
Attached Files CodeProblem.txt (40.3 KB, 35 views) Frinavale EMM Join Date: Oct 2006 Location: Canada
Posts: 6,545
#2:
Dec 9 '10
Listbox causes page to Crash getting "Internet Explorer cannot display the webpage" Instead of posting your entire code for us to review, could you post the specific portion of the code that you think is causing the problem (probably the retrieval or setting of the data).
I got my theme for "graduate work" (I dont know if this is the right term but I think you'll understand) which is: Developing CMS in ASP.NET/MVC What I need is some good literature.
View 2 RepliesI have experience with creating web-based database applications for the intranet but not the internet. I want to create a web-based database application to be deployed to the internet.Do I need an ASP.NET (3.5) and SQL Server (2005) host provider?How should I handle user authentication?How should I handle site
View 1 Replieswhen i test this page http://www.catalogues4u.com.au/ViewCategory.aspx?catID=119 im getting the above error. to replicate this issue visit the above page in ie7 and you will get the prompt.
View 3 RepliesOur ASP.NET 2 web application handles exceptions very elegantly. We catch exceptions in Global ASAX in Application_Error. From there we log the exception and we show a friendly message to the user.However, this morning we deployed the latest version of our site. It ran ok for half an hour, but then the App Pool crashed. The site did not come back up until we restored the previous release.How can I make the app pool crash and skip the normal exception handler? I'm trying to replicate this problem, but with no luck so far.Update: we found the solution. One of our pages was screenscraping another page. But the URL was configured incorrectly and the page ended up screenscraping itself infinitely, thus causing a stack overflow exception.
View 4 RepliesI converted a ASP.Net website to ASP.Net web app and changed the framework from 2.0 to 3.5
The web application works fine in Visual studio. However, If I compile the app in a dll, and try to reuse its middle layer in another web project, All the classes that have a static variable crash. Code like:
public static string myString = "Something";
However if I convert it to a property like this:
`public static string myString {get{return "Something";}}`
What is happening is I'm trying to process international characters, but the code is falling through (giving up?) and replacing the field with a blank (well, I guess the screenshot is at the bottom)... The customer recently asked for support for Polish characters, and gave us a list of which ones he wants added.
This is the entire function:
Code:
Protected Function chkExtchars(ByVal name As String) As String
Dim j As Integer = 0
Dim dt As New DataTable
Dim c() As Char = Nothing
Dim n As Integer
Dim nc As Char
Dim newname As String = ""
dt = HttpContext.Current.Session("xChars")
[Code] ....
But maybe it needs to be sequential? (the numbers on the far left?)
I just deployed my first ASP app to a remote server (using SQL SErver) and some data entry forms are crashing when the associated table is empty. The PageLoad method is empty, but the error occurs before the page becomes visible. The limited run time error I see says page not found error 404. If I put a record in the table using Mgt Studio, everything is fine. The form contains two LInq data source controls that populate dropdown lists, but everything else was hand coded - no data bound controls at all.
There is no attempt to access the actual empty table until the data has been entered and the Insert button is pressed. I have made sure that the tables that use the datacontrols for dropdowns have data in them, even though this should not matter. I did not have this problem on my local machine when developing. In summary, page does not load when table is empty, even though I do not access the table when the page loads?????
This is the entire codebehind file, and yet the page cannot even seem to load.
[Code]....
a look at this site.maimei.chAfter 5 times opening a new site via ajax (fancybox) it crashes in IE?ne little thing is that i load a whole asp.net site via ajax in the new window. so viewstate and other overhead is there twice after. could this be the problem? if yes, why just after 5 times?.is it possible to call just the content of an specific element via ajax? may be just the innerhtml of the body element of the called site?
View 1 RepliesI'm downloading a file from my intranet site and on Chrome, it works as expected. But when I try it on IE, it crashes.
ASP.NET Code:
<a href="../nbd.exe">TEST</a></h2>
Is there something I need to do just for IE?
Also, it works fine in Opera and Firefox. So just IE...
My project uses swfobject.js to display a Flash animation. But in Internet Explorer 8.0, if I try to refresh the page, the browser window closes.
To re-create this problem:
Download a sample solution from: [URL] Unzip the solution and open it in VWD 2010 or VS 2008 Pro Be sure VS is configured to use its development server (not IIS) Select Debug | Start Debugging (F5) When the Default.aspx page opens, press ctrl-F5 to refresh the browser window The browser window will close with no warning or explanation So far, I haven't seen this behavior in Firefox, and nobody has reported it in any browser other than IE-8.
I have two pages, step0 and step1.
Users get firsly to the step0 page, where they fill some info, the page updates, they fill some more, and then get redirected to step1 page.
Problem is that upon getting to the Step1 page, if the user clicks on the back button, then he gets to the last stage of the step0 page, which uses sessions and variables that are no longer existing, what causes a crash.
I'm looking for an elegant way to make sure that with each page visit, the page will restart itself to start phase.
I have this idea maybe twitching the Page_Load function, something about the is_post method, but since each page's post back hits this function,
When im try to export to excel from my web page im getting this error.
View 2 RepliesAfter upgrading an asp.net application to 2.0 from 1.1 I am receiving a large 100+MB .tmp file in C:Temp on the web server when the w3wp process serving that application crashes. If you open the file it looks like it is some sort of dump file. how to turn this off. I know what is crashing the application and process.
View 2 RepliesI'm trying to bind a nullable bit column, which at the moment is mostly null, but I need to somehow convert the null to a 'false' on runtime because it doesn't bind to a checkbox if it's null. But, I am currently unable to change the default value and update all records accordingly - is there a way to do this in runtime?
View 2 RepliesI couldnt help but notice that if you have a FileUpload-control, and then try to upload a file thats bigger(in bytes) then the allowed maxiumsize, then the site crashes or some wierd "Connection problem"-page shows up, atleast for me in Firefox...
So my question is simply...is this just for me?..and if not, how do I fix this the best way?...cause the current "crash-page" aint a nice way of handeling the problem in my opinion...whould be much better to actually just show some custom-page that lets the user know that thier trying to upload a file thats way to big..
We recently migrated our ASP.NET 2.0 application to ASP.NET 4.0. It is running on Windows 2003 with IIS 6.0. After migrating, we have found that the ASP.NET 4.0 worker process w3wp.exe crashes intermittently with an 'Access Denied' exception. The stack trace of the exception does not point to any code written in our application. We are clueless as to what could be causing this. The worker process crashes when it makes a remoting call over http.
Event Type: Error
Event Source: ASP.NET 4.0.30319.0
Event Category: None
Event ID: 1325
Date: 2/22/2011
Time: 10:01:03 AM
User: N/A
Computer: SYS01
Description:
An unhandled exception occurred and the process was terminated.
Application ID: /LM/W3SVC/1/ROOT/Remoting
Process ID: 4660
Exception: System.TypeInitializationException
Message: The type initializer for 'ConvertClass_1' threw an exception.
StackTrace: at ConvertClass_1.Finalize()
InnerException: System.Management.ManagementException
Message: Access denied
StackTrace: at System.Management.ManagementException.ThrowWithExtendedInfo(ManagementStatus errorCode)
at System.Management.ManagementScope.InitializeGuts(Object o)
at System.Management.ManagementScope.Initialize()
at System.Management.ManagementObject.Initialize(Boolean getObject)
at System.Management.ManagementClass.CreateInstance()
at ConvertClass_1..cctor()
For more information, see Help and Support Center at [URL] We have tried options like giving permissions to ASPNET account in the WMI services under 'Component Services' but to no avail. Has anybody else faced this issue?
I have a memory leak somewhere that I cant find. Every few days my server will crash, and just before that I log a ton of SQL errors stating that it is "out of memory".
I cant find it anywhere, all of my connections are being disposed like so:
[Code]....
Then I call the connection from my pages like so:[Code]....
That is all pretty straight forward. The connection is disposed because it is implementing the USING clause. I am opening the connection in my connection manager class, and not where it is being utilized?Or, could the problem be in the below method I am using to populate a SqlDataReader:[Code]....
Now, at first it appears as though this could be the problem because the Connection isn't part of a USING clause, however doesn't the 'Data.CommandBehavior.CloseConnection' pretty much do the same thing. This makes sure that the connection is closed when the reader is closed, right? Here is how I call that above reader from my login page code behind:[Code]....
So the DataReader will get closed even without the .Close() because it is in the USING, and the connection should get closed because I specified it in the ExecuteReader paramters right?
I need to develop in ASP.NET or in SilverLight a web-based editor and a web-based player for PowerPoint presentation. Are there any components I can use to do this?
View 2 RepliesI have a simple intranet site. It has a role based authorization in the web.config file.
Any user's in a specific role called as "Apr-Sales-Writers" will be authorized to use those pages. If not, they will not be authorized. So far so good. Works fine. But we added additional functionality where a new active directory group (means new role) has to be added and user's belonging to this new AD group should be given access to only specific .aspx pages on the intranet site. I am using a web.sitemap and it looks like this.
If the user's belong to say AD group "Apr-Sales-Writers", they should access only default.aspx and salesData.aspx pages. User's belonging to new AD group (which I did not include in the web.config file below), should have access to other .aspx pages.
[CODE]<?xml version="1.0" encoding="utf-8" ?>
<siteMap xmlns="http://schemas.microsoft.com/AspNet/SiteMap-File-1.0" >
<siteMapNode url="default.aspx" title="Home" description="Home">
<siteMapNode title="sales Data" description="sales Data">
<siteMapNode url="salesData.aspx" title="sales Data" description="sales Data" />
[Code] ....
which i added one sitemap in whcih i added all the pages n i want to retrive that sitemap in masterpage based on login in whcih suppose admin hs login then display only admin pages with sitemap n if normal user hs login then it ll display only normal user pages with sitemap. here i didn't use login control but i create login page manually.
View 1 RepliesI have an application called barcode available on a server on the web. The application is used to generate barcodes. The user is able to save her progress directly on her desktop, however though whenever the user try to load the saved progress. It is doesnt remotely connect to the server, instead, it defaults only the saved copy on her desktop. so for example
we have the following aspx created
barcoded.aspx. The barcoded.aspx is available on the server. the page has the following information
Name: PRT321-1 Code: 456789-1000
Label: 678900-001-001
Now, this information is saved as webpage.html. however though, when the user goes to the saved location and clicks on the saved copy, it automatically load the copy as a webpage and allow the user continue with the modification online but that is not the case. Does anyone know how to fix this problem.
I'm trying to convert a windows based application to a web based using vb.net.
I am having a problem with the following:
System.Windows.Forms.WebBrowser
is there any similar web calling to this?
I'm doing this:
Dim htmlbox As System.Windows.Forms.WebBrowser
But obviously im unable to do this since it's a windows.. I need to find something similar for web.