Tuesday, June 30, 2015 2:47 PM
This article allows me the opportunity to demonstrate a feature of my newest favourite open source library: EPPlus. EPPlus is a .net library that reads and writes Excel 2007+ files using the Open Office Xml format (xlsx). This fantastic, easy to use (and free) library enables the use of Excel in ASP.NET applications without the need to install the Access Database Engine (ACE) or having to mess about with unsupported Office Automation on the web server (assuming you can even get Office installed there). Prompted by a rash of similar questions that appeared on the ASP.NET forums recently, this article looks at reading the contents of an uploaded Excel file without saving it, and displaying the data in a Web Forms GridView.
Viewed 89 times
Thursday, June 18, 2015 1:56 PM
This article looks at how to configure Entity Framework to manage many to many relationships based on the same table. This scenario arises the same entity is related to itself in a different role. An example is the related product feature you might see in a "People also bought" section of an ecommerce site. Another is the relationship between clients and agencies in the advertising and marketing world. That scenario will form the basis of the illustration below.
Viewed 397 times
Monday, May 18, 2015 1:45 PM
TagHelpers is one of the new features introduced in MVC 6, part of ASP.NET 5. They are used for generating reusable pieces of UI that require some kind of server-side processing. I took a closer look at the built-in collection of TagHelpers in my last article, Introducing TagHelpers in ASP.NET MVC 6. This article shows how to create your own custom TagHelpers. It will illustrate two ways of doing so: through parsing custom attributes; and by binding properties on the TagHelper.
Viewed 1562 times
Monday, May 11, 2015 1:17 PM
TagHelpers is one of the new features introduced in MVC 6. The TagHelper's role is similar to the one played in previous versions of ASP.NET MVC by HtmlHelpers: they are designed to simplify the work required to author views that need to respond dynamically to the data provided to them. However, the way in which they work and their impact on view design is very different to HtmlHelpers.
Viewed 3443 times
Thursday, April 30, 2015 1:26 PM
Hardly a week goes by without someone asking a question in the ASP.NET forums about parsing HTML for one purpose or another. Mostly, the questions are couched in terms of 'finding values' or similar, prompting responses from the community that recommend one regular expression pattern or another, treating HTML as a string of text with no structure or rules. In fact, HTML is a structured document format with a set of very clearly defined rules, which means that it can easily be parsed given the right tool. My favourite tool for parsing HTML is the HtmlAgilityPack.
Viewed 2066 times
Thursday, April 23, 2015 1:19 PM
This post explores the options available to you when your application requirements include managing and storing time using the Entity Framework. Specifically, I am thinking of durations of time, such as the time required to complete some kind of task, not the time part of a date. Relevant examples might include storing the length of a movie, or the preparation time required for a recipe.
Viewed 2808 times
Tuesday, April 14, 2015 1:25 PM
Visual Studio 2015 introduces a completely new version of ASP.NET, but it also includes version 6 of the C# language. Previous new versions of C# have heralded substantial changes like the introduction of
await in version 5,
dynamic in version 4, LINQ in version 3 and so on. There are no major feature changes or introductions in version 6, but there are a number of syntactical improvements that you are likely to use on a daily basis. Here's a rundown of them.
Viewed 9114 times
Tuesday, April 7, 2015 1:39 PM
ASP.NET 5 is being designed so that your application is only dependent on features that it actually needs. This is achieved in large part by creating a composable framework, where the developer opts in to non-essential features - a number of which are baked in to traditional versions of ASP.NET. One of the features that this applies to is Session State. This article looks at how to obtain and use session state in ASP.NET 5 applications.
Viewed 15874 times
Tuesday, March 31, 2015 1:22 PM
ASP.NET 5 has been largely rewritten from the ground up, and incorporates some radical changes when compared with previous versions of ASP.NET. One of the biggest changes is in the HTTP Pipeline. This article looks at how those changes impact the design and registration of plug and play components that used to be represented by HttpModules.
Viewed 14055 times
Tuesday, March 24, 2015 1:21 PM
This article takes a comprehensive look at the business of generating and sending email from an ASP.NET MVC application. It covers the most common use cases as well as some advanced scenarios. It also explores some of the more common errors that arise from attempting to generate and send email programmatically from an ASP.NET MVC site.
Viewed 12024 times
Monday, March 16, 2015 1:20 PM
There's a lot of confusion surrounding the numbers relating to the impending release of the next version of ASP.NET. This post takes a look at the main ones and seeks to explain their significance.
Viewed 7790 times
Tuesday, March 10, 2015 1:07 PM
Bang! An unhandled exception occurred during the execution of the current web request. And that's it - your visitor is met with the yellow screen of death and they are left wondering what they did wrong. You might not even be aware of what's just happened - unless your visitor can find some way of alerting you, oh, and they bother to do so. That's the problem with run time errors; the code worked fine when you ran it on your machine. But then along came a user and they tried to do something you didn't anticipate and broke your site. So what should you do about this?
Viewed 6579 times
Tuesday, March 3, 2015 1:26 PM
My original article about Drop Down Lists in ASP.NET MVC has proven to be among the most popular on this site, amassing over a third of a million views since it was published 5 years ago. This article builds on the original by looking at using drop down lists for multiple selections, and the helper that was introduced in MVC 5.1 to support enumerations as a source of select options.
Viewed 24455 times
Tuesday, February 24, 2015 2:51 PM
If you have built sites with the ASP.NET Razor Web Pages framework, you might want to look at migrating them to ASP.NET MVC at some point. This tutorial is the last in a series of three that explores how you do that by taking a step by step approach to migrating the WebMatrix Bakery template site to ASP.NET MVC 5. Previous tutorials in the series have looked at the roles of the View and Controller, and the data access and view model aspects of the Model. This final part covers model binding and form posting. A download (c. 24MB) featuring the completed application is available.
Viewed 9093 times
Wednesday, February 18, 2015 1:16 PM
If you have built sites with the ASP.NET Razor Web Pages framework, you might want to look at migrating them to ASP.NET MVC at some point. This tutorial is the second in a series of three that explores how you do that by taking a step by step approach to migrating the WebMatrix Bakery template site to ASP.NET MVC 5. Along the way, each of the core parts of MVC are discussed by way of an introduction to the framework. The tutorial is divided into three parts. The first part looked at the roles of the View and Controller. This part looks at the M in MVC, the Model. Specifically, it features data access and view models. The final part will cover model binding and form posting. A download (c. 24MB) featuring the completed application is available.
Viewed 7874 times
7/1/2015 7:03 AM
In response to iTextSharp - Drawing shapes and Graphics
I have created a rectangle using above methode. Now I want to add a text in the center of this How I...
6/30/2015 6:12 PM
In response to Reading Excel Files Without Saving To Disk In ASP.NET
Ahh.....this is awesome. Happy to see after a long time you wrote a article on web form :D...
6/30/2015 7:16 AM
In response to Posting Data With jQuery AJAX In ASP.NET Razor Web Pages
Mike, you're the Man! Another great article. So incredibly helpful. I'm definitely going to buy your...
6/30/2015 5:32 AM
In response to ASP.NET MVC 5 with EF 6 - Working With Files
Very good and helpful tutorial. Thanks. Just wanted to know what would be the max file size limit we...
6/30/2015 1:59 AM
In response to Programmatically accessing data from DataSource controls
What if I want to pass parameters natively using the DataSourceSelectArguments object, instead of be...
6/29/2015 3:13 PM
In response to How to retain carriage returns or line breaks in an ASP.NET web page
very nice i'm use this in my code thank you.... ...
6/29/2015 2:22 AM
In response to MVC 5 with EF 6 in Visual Basic - Sorting, Filtering and Paging
This is the first example that I have found that works....
6/28/2015 4:57 AM
In response to Posting Data With jQuery AJAX In ASP.NET Razor Web Pages
Mike, what if I don't want to render back the text to the browser, but I want to send it some other...
6/27/2015 4:00 PM
In response to Migrating Classic ASP To ASP.NET Razor Web Pages Part One- Razor Syntax And Visual Basic
have you used any of the code converters to convert classic asp to c#? If so, which one do you have...
6/27/2015 12:49 PM
In response to How To Send Email In ASP.NET MVC
Your article is very very useful for me...thanks for giving this article ...this is very simple to u...