78 posts tagged with "dotnet"

Problem​

in Visual Studio's debugger, you've landed on an Exception statement. You look at the stack trace but it just points back to a custom exception class you've created. But you know that code is good, it can't be throwing the error. What's going on here?

Solution​

this is an easy mistake to make. I've run it across it in code from a number of people, and recall making the mistake myself at one point. The problem is most likely due to nested throws to a new custom exception.

This is not part of my series on performance tuning a specific app.

Problem​

I have a Registry class in which I want to place a generic collection of objects. In this way I can add new items to the registry on the fly (i.e. from a user application), without having to recompile the library containing the the class. What is my best option, in terms of performance, for a .Net 2.0 collection to hold my mixed-bag of objects? I'll be referring to these with a string name.

This article is part of the series An Exercise in Performance Tuning in C#.Net.

Where else could I improve performance? I thought I should inspect the memory usage and garbage collection. For that I found a great little tool from Microsoft, the CLR Profiler, which I found through the MSDN Patterns & Practices series of guides on application performance and scalability. The specific article that I found most helpful was How To: Use CLR Profiler.

This article is part of the series An Exercise in Performance Tuning in C#.Net.

The application I was working on makes a number of calls to a remote server to perform operations. These calls are made through a proprietary API implemented in .Net. Speaking with the vendor, I discovered two really dumb mistakes that were killing our performance.

Problem​

Your application is slow. Horribly slow. And that just isn't acceptable.

Problem​

Microsoft .Net Framework 1.1 and .Net Framework 2.0 don't play well together (as ASP.Net apps) on Windows 2003 Server 64 Bit Edition.

Solution​

either upgrade any ASP.Net 1.1 to 2.0 or switch to 32 bit compatibility mode. Of course switching to 32 bit mode will cause you to lose out on some performance benefits, but maybe you're okay with that (unless you're running under a very high load). Two easy steps:

Problem​

Need to convert an image from one format to another using .Net.

Solution​

Microsoft has really made this easy. The key is the System.Drawing.Image class, combined with the System.Drawing.Imaging.ImageFormat class.

Steps:

Problem​

In a .Net 2.0 Windows Forms application, user action causes a new

row to be added to a DataGridView control. When the viewport fills up, causing the vertical scrollbar to appear, the most recent entry is hidden "below the fold" — off the screen. Users want to see the latest entry at all times.