A C# Quick Tip: You’ve probably seen ‘break’ before in Switch Case statements, but it also plays an important role in Foreach Loops. To break completely out of a foreach loop (foregoing all the remaining loops), use: break; To go to the next iteration in the loop, use: continue; When is ‘break’ useful? It is [...]
Tag Archives: ASP.NET/C#
C#: That Pesky DBNull Error in Datatables
Datatables and Tableadapters are one of the most beautiful things about C# and Visual Studio, until you’re processing rows in your datatable and you get something that reads like “The value for column ‘your_column’ in table ‘your_table’ is DBNull.” If you go a little further, you may get: “Exception Details: System.InvalidCastException: Specified cast is not [...]
C# – SQL Server Foreign Key, Unique constraints
I got tripped up today with a particularly nasty Join statement that worked perfectly form 90% of the queries, but was blowing up at times. The error message was: Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints. I looked and looked at this SQL code: It looked [...]
Get ASP.NET DropDownList Selected Value with jQuery
With Microsoft’s recent announcement that they will begin shipping jQuery with Visual Studio, the little Javascript framework is about to hit the big time (it was already sort of big time, but this is BIG TIME). And rightfully so. I have been a Prototype and Scriptaculous user for over a year now. But I am [...]
ASP.NET – C# – Emulating the VB Control Array – Pt. 1
For you veterans of VB6, the control array probably became an old friend, or at least an annoying neighbor if you didn’t like them. You couldn’t help run across the concept in VB6 because every time you copy and pasted a control for the first time, you got asked if you wanted to create a control array. If [...]
ASP.Net C# – PHP Equivalents
On this post, I will be collecting ASP.NET C# commands that I use frequently in PHP but I have to continually look up in the little bit of ASP.NET that I do. PHP can be frustrating for its inconsistencies in syntax, but what is even more frustrating is when you’re trying to do something in [...]
ASP.NET/C#: Convert HTML Colors to System.Drawing.Color
HTML colors come in all sorts of flavors: hexadecimal (#0066ff), named colors (e.g. LightSkyBlue…here’s the link). Many people may be very comfortable with working with HTML colors, so if you’re in C# and needing to get the .Net equivalent, you can translate directly from HTML colors with System.Drawing.ColorTranslator.FromHtml(). Here’s the usage: System.Drawing.Color myColor = System.Drawing.ColorTranslator.FromHtml(“Red”); [...]
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