Microsoft EMEA IIS/ASP.NET and web developer support team

I recently attended an offsite meeting in Munich for our Microsoft EMEA IIS/ASP.NET and web developer support team. It’s the first time we’ve had the chance to get together in one place for several years (even though we work together everyday!) and it was great to meet up. Not everyone could make it but here…

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“Script Error encountered", "’__doPostBack’ is undefined” or MaintainScrollPositionOnPostBack fails to maintain the scroll position

  You may receive this error in the browser using Internet Explorer 10: “Script Error encountered”, “‘__doPostBack’ is undefined” Fixes are now available for Microsoft .NET Framework 3.51 (Windows 7 / Windows Server 2008 R2), Microsoft .NET Framework 4.0 and Microsoft .NET Framework 2.0 SP2: http://support.microsoft.com/kb/2600088   (.NET Framework 4.0)           http://support.microsoft.com/kb/2608565   (Win7/Server 2008 R2 ) http://support.microsoft.com/kb/2600100  …

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“System.Runtime.InteropServices.COMException (0x80070102): Operation failed” trying to send a Fax from an ASP.NET application

I recently had a support case where the customer was trying to send a fax from an ASP.NET application but was getting this error when they did: System.Runtime.InteropServices.COMException (0x80070102): Operation failed They got this error after a short delay after executing the fax code. They were trying to use FAXCOMEXLib with code similar to the…

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You spent HOW much on our new server and the app slowed DOWN??!!

I had a support case recently where the customer had moved their server farm onto brand new hardware, each server with lots of CPUs. At the same time they had taken the operating system from Windows Server 2003 to Windows Server 2008 R2. I forget how many CPUs they had but let’s just say that…

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How to figure out why your web application is running slow.

I came across this great “portal article” (by which I mean it has links to resources on a particular topic) about Developer Tools & Platforms Performance It starts of with a short plug for Microsoft advisory services but then moves onto a long list of self-help resources, including articles, blog posts and tools. HTH Doug

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FIX: Inline data-binding expressions in a templated web user control disappear after you generate a local resource for an ASP.NET 2.0 web application

We’ve now published the KB article for a new hotfix that arose from a customer case I was working on recently: FIX: Inline data-binding expressions in a templated web user control disappear after you generate a local resource for an ASP.NET 2.0 web application If after reading the article you want the fix, there is…

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MS10-070 – Important ASP.NET security bulletin and update available

On Tuesday we released a very important security bulletin and update for ASP.NET. If you are responsible for an ASP.NET web server please take the time to review the information and act accordingly. I’m not going to try and regurgitate the detail here but here are some key links: Bulletin MS10-070 http://www.microsoft.com/technet/security/bulletin/MS10-070.mspx ScottGu blog ASP.NET…

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Errors installing ASP.NET 4.0

Here is a little problem you might run into when trying to use aspnet_regiis.exe to register ASP.NET 4 on a site. C:WindowsMicrosoft.NETFrameworkv4.0.30319>aspnet_regiis -i Start installing ASP.NET (4.0.30319). ……. Finished installing ASP.NET (4.0.30319). Setup has detected some errors during the operation. For details, please read the setup log file C:UsersjohnAppDataLocalTempASPNETSetup_00003.log C:WindowsMicrosoft.NETFrameworkv4.0.30319> When you look into the…

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Perfecto–a performance tool for ASP.NET applications

Not had a chance to try this out yet but this looks pretty interesting: http://blogs.msdn.com/b/josere/archive/2010/04/09/taking-a-quick-peek-at-the-performance-of-your-asp-net-app.aspx It takes advantage of the ETW infrastructure to give insight into why your ASP.NET application might be running slowly (if it is!). HTH Doug

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Free Web Application Toolkits

Ever wanted to develop some cool new website feature but not been sure how to start? Well, there are a bunch of web application toolkits here to get you started. They demonstrate how to start developing sites that incorporate features such as calendars, Bing mapping, Bing search, RESTful services, mobile features, social networking, rich searchable…

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