37 items found in the C# Category

Usage of the @ (at) sign in ASP.NET

Thursday, January 22, 2015 1:54 PM

C# ASP.NET MVC ASP.NET Web Pages Razor

The number of places where you might use or encounter the @ sign in ASP.NET has grown over the last few years and its exact purpose in all circumstances still seems to cause confusion. Here's an overview of the most common places that it crops up, and guidance on its correct usage.

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4 Comments for this item

Book Review - CLR Via C# Third Edition

Sunday, September 12, 2010 8:14 AM

C# General Book Review

I've had a review copy of Jeffrey Richter's CLR via C#, Third Edition for some months, and it has taken until now to get round to publishing my thoughts on the book. It's not my fault. I blame the book. It made me forget why I was given a copy in the first place. Let me explain...

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Viewed 8694 times

1 Comment for this item

Finding Yesterday in SQL and C#

Monday, July 12, 2010 9:27 PM

C# SQL

Here's something that comes up often in forums - How To Find Yesterday in SQL or C#. Piece of cake, if you know how, but tricky if you don't. And especially tricky to get the right value if you are not clear on the requirement.

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4 Comments for this item

Converting URLs Into Links With Regex

Saturday, May 22, 2010 10:56 PM

C# Extension Method

Following on from the recent spate of extensions methods I've posted, here's another I use to convert URLs and email addresses into links within HTML. You may want to restrict users from submitting HTML tags via forms in your application, which means that URLs and email addresses that they submit appear as plain text unless they are subjected to some kind of processing.

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Viewed 11212 times

1 Comment for this item

Highlighting Keywords Found In Search Results

Saturday, May 22, 2010 7:41 PM

C# ASP.NET 3.5 Extension Method ASP.NET Web Forms

A common question in the forums is how to highlight key words found in search results. Here's an extension method that does that, both for partial matches, or whole word matches.

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6 Comments for this item

Displaying The First n Characters Of Text

Sunday, May 16, 2010 9:59 AM

C# ASP.NET 3.5 Extension Method

Displaying the first n characters of a block of text on a page without chopping words off halfway through is a common requirement. There are a number of ways to achieve this, but here's an extension method that you might find useful.

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15 Comments for this item

Using gacutil.exe and Reflection to generate the Exceptions Cheat Sheet

Wednesday, February 10, 2010 7:28 AM

C# Visual Studio General ASP.NET 3.5

The most recent addition to my Cheat Sheets features details of all the Exceptions that can be found in the most commonly used assemblies within ASP.NET development. Compiling this information was an interesting challenge. I could have simply copy-pasted from MSDN, but that would have been extremely tedious. Instead, I ended up with a blend of Linq to XML, Reflection, a dash of Regex and the Global Assembly Cache Tool - gacutil.exe. Here's the full story.

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3 Comments for this item

Cheat Sheet - .NET Framework Exceptions

Sunday, February 7, 2010 5:19 PM

C# General ASP.NET 3.5

Here's a list of Exceptions that can be found in the assemblies which are most commonly used in ASP.NET development.  Ideally, you should be as specific as possible when catching or throwing Exceptions. The more specific you are, the less work the CLR has to do in locating the appropriate catch block, and the more informative your error messages are, which should help speed up identifying the source of any problems.

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6 Comments for this item

Parameterized IN clauses with ADO.NET and LINQ

Monday, September 28, 2009 9:53 PM

C# ADO.NET LINQ ASP.NET 3.5

Since my article on using parameters for Preventing SQL Injection In ASP.NET, I have had a few emails asking how to do the same with an IN clause expression. In this entry, I explore a couple of ways to do this.

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Viewed 39378 times

11 Comments for this item

Upload and Crop Images with jQuery, JCrop and ASP.NET

Monday, January 5, 2009 1:54 PM

C# AJAX Javascript ASP.NET 3.5 jQuery

I got given jQuery In Action for Christmas. By nature, I'm kind of a late adopter, and I'm already regretting this fact. jQuery has been around for some time, and I wished I had looked at it sooner. It's a fantastic library that really simplifies Javascript development, and is already attracting a goodly number of plug-ins. JCrop is one such, and while it hasn't yet reached version 1.0, it is remarkably easy to use as a web based image cropper. Here's how to put jQuery, JCrop and a FileUpload control together to allow users to upload images and crop them.

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117 Comments for this item

Delegates, Anonymous Methods and Lambda Expressions in C#

Sunday, December 7, 2008 7:33 PM

C# ASP.NET 3.5

Delegates in C# cause a fair amount of confusion, but with the introduction of LINQ to SQL and the profilic use of the Lambda Expression operator (=>) that it has foisted on an unprepared batch of beginners, an understanding of how these two items are related, together with Anonymous Methods becomes more important. Most definitions of Delegates that you find start off with comparing them to "function pointers in C or C++", which is great if you ever worked with those languages and understood them, but not helpful to new programmers. Here's my attempt at simplifying the various concepts.

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8 Comments for this item

iTextSharp - Page Layout with Columns

Monday, November 24, 2008 7:41 AM

C# ASP.NET 3.5 iTextSharp

I have now covered many of the basics involved in generating PDF files from ASP.NET using iTextSharp in the series of articles listed below. This article will look at additional ways to provide formatting to documents through the use of columns.

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18 Comments for this item

iTextSharp - Drawing shapes and Graphics

Monday, November 17, 2008 12:30 PM

C# ASP.NET 3.5 iTextSharp

The previous iTextSharp article looked at bringing images into a PDF file and working with them. Sometimes, however, you may want to draw shapes and lines within the PDF and not rely on images. iTextSharp includes a lot of functionality that covers simple drawing to quite complex shapes. This article gets you started. Previous articles are listed below:

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iTextSharp - Working with images

Friday, November 7, 2008 11:00 PM

C# ASP.NET 3.5 iTextSharp

The seventh article in my iTextSharp series looks at working with images. This article builds on the previous six which are listed below.

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Viewed 329264 times

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iTextSharp - Introducing Tables

Monday, November 3, 2008 7:34 AM

C# ASP.NET 3.5 iTextSharp

Tables will probably be one of the most used elements in PDFs generated from ASP.NET applications to provide the structure for documents such as orders and invoices. This overview is not an exhaustive examination of tables, but provides an introduction to working with them through iTextSharp, and builds on the previous articles in this iTextSharp series:

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65 Comments for this item

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