ASP.Net pages can inherit from custom classes (as long as they inherit System.Web.UI.Page). This can be useful to add utility functions or shared (code-behind) behaviors to your pages. (Note that you could also use Extension methods or HTTP modules)
However, if you try to inherit a generic base class, it won’t work:
public class DataPage<T> : Page { public T Data { get; set; } }
<%@ Page Language="C#" Inherits="DataPage<string>" %>
This code results in a yellow screen of death, with the parser error, Could not load type 'DataPage<string>'
.
This happens because the ASP.Net page parser is unaware of C# generics syntax. The familiar generics syntax (eg, List<int>
) is actually a C# innovation and is not used at all in the actual framework. The “native” generics syntax, which is used by Reflection, is markedly different: List`1[Int32]
(namespaces omitted for brevity). This name is returned by the Type.AssemblyQualifiedName property.
Since ASP.Net uses reflection APIs to load types, we need to specify generic types using CLR syntax (and with full namespaces). Therefore, the following page will work:
<%@ Page Language="C#" Inherits="TestSite.DataPage`1[[System.String, mscorlib]]" %>
However, it’s not so simple. ASP.Net does not call Type.GetType
to parse these strings; instead, it loops over every referenced assembly and calls Assembly.GetType
on each one. This is why you don’t need to include the assembly name whenever using the Inherits
attribute (which would have been necessary for Type.GetType
) Ordinarily, this is very useful, but here, it comes back to bite you.
It is not possible to parse a type from one assembly with a generic parameter from a different assembly using Assembly.GetType
, unless the generic parameter is in mscorlib.
Therefore, for example, it is not possible to create an ASPX page that inherits DataPage<DataLayer.Product>
if DataLayer.Product
is in a different assembly than DataPage
. As a workaround, one can create a non-generic class which inherits DataPage<DataLayer.Product>
, then make the ASPX page inherit this temporary class.
26 comments:
You wrote it so well. Emily
I recommend you to visit this website before writing thesis. Here you can learn more at least about introduction
شركة غسيل كنب بمكة بالبخار
تنظيف بمكة افضل شركة تنظيف بمكة بالبخار
شركة غسيل كنب بمكة بالبخار
mr jatt Mp3 New Punjabi Song,Single Tracks Latest song download also Listen Latest Music Albums Online in High Quality at Mrpendus.in
mr jatt
Yes, this is a pretty excellent topic and it is really helpful. I read various topics, but I also read your blogs. I'm seeking for Best Essay Writer, which provides the best academic work.
Hello. great post. I really liked it. I will definitely share with my colleagues from the company writemypaper.help who are professional writers and prepare term papers and essays to order. very high quality work
You can order an essay by visiting the site write my essay Essay Keeper where information on the terms of cooperation and on average prices and deadlines is provided. Each project is evaluated separately, which means that the client pays for the complexity and urgency of the work, and not for the number of pages. Based on this, we understand that in order to reduce the price, first of all, it is necessary not to postpone the order. The more time the author has to complete, the higher the quality will be, and the lower the price
Providing services to students for completing assignments of various types since 2007, qualified authors from the project https://essaykeeper.com/term-papers-for-sale have proven themselves on the positive side. You will make the right choice by entrusting the solution to the problem of writing student work to authors who have many years of experience in writing student work. We help students who really need prompt and high-quality assistance in getting an education
Your blogs are really good and interesting. It is very great and informative. Ordinarily, this is very useful, but here, it comes back to bite you separation agreement in virginia. It is not possible to parse a type from one assembly with a generic parameter from a different assembly using Assembly. I got a lots of useful information in your blog. Keeps sharing more useful blogs..
Information that is very well written. Anyone who utilizes it, including me, will find it to be valuable. I'll read more postings if you keep up the good work.Thank you for sharing. Abogado de Delitos Sexuales Fairfax VA
Your blogs are excellent and fascinating. It's fantastic and educational.dui lawyer prince william county va
I know the basic about ASP .Net about your article thank you for sharing this useful article. Dropping domestic violence charges in virginia
Thanks for shedding light on the limitations of generic base classes in ASP.Net. Looking forward to learning about MVC magic in your next post
Quick and Easy Divorce in New York
Generic base classes in ASP.NET are used to create reusable components that can work with any data type. They are defined with one or more type parameters, specified within angle brackets. When a concrete class inherits from a generic base class, the actual type(s) to be used for the type parameter(s) is specified. This allows for flexibility, reusable components, and easier maintenance. Generics provide compile-time type safety, catching errors early in development and improving code reliability. They are implemented using type erasure, resulting in efficient execution and minimal performance overhead. Generic base classes are essential for modern web development with ASP.NET fairfax gun lawyer.
Generic base classes in ASP.NET create reusable components for any data type, defined with type parameters within angle brackets. They provide flexibility, reusable components, and easier maintenance. Generics provide compile-time type safety, catch errors early, and improve code reliability. Implemented using type erasure, they result in efficient execution and minimal performance overhead, ensuring code reliability and catching errors early in development.new jersey divorce lawyers
The Rossmont Riser 210 is a versatile water pump with a flow rate range of 210 to 850 gallons per hour (gph), making it suitable for various aquarium setups. Known for its reliability and energy efficiency, this pump is ideal for both freshwater and saltwater tanks. The adjustable flow rate allows for precise water circulation, promoting a healthy aquatic environment.
Divorcio Abogado Falls Church VA
A lawyer might commonly say, "Let's carefully review all the documents to ensure we're fully informed. It's important to follow the correct legal procedures, so we avoid any potential issues. I'll advise you on the best course of action to protect your interests. Rest assured, your confidentiality is a top priority throughout this process."
If you need assistance with a Abogado de Ordenes de Alejamiento de Nueva Jersey , a divorce lawyer can provide expert advice. Contact us today for more information.
A generic base class is a class that uses generics as a template for its data types. By defining a base class with generic parameters, developers can create more generalized and reusable components. For instance, a generic base class could be used to create a repository pattern that works with different types of entities, avoiding the need to write repetitive code for each entity type. personal injury lawyer in Baltimore
traffic lawyer shenandoah va
In the event that you're having to deal with traffic penalties in Shenandoah, a talented traffic legal counselor can have a significant effect. With top to bottom information on neighborhood regulations and court techniques, a Shenandoah traffic legal counselor can assist with diminishing fines, limit focuses on your permit, and possibly stay away from a conviction by and large. They offer customized systems to address what is happening, guaranteeing the most ideal result. Contact a believed Shenandoah traffic legal counselor today to safeguard your driving record and freedoms.
The author is pleased with Bolton Valley's Cyber Monday deals, which offer impressive savings on lift tickets and accommodation. The resort offers a perfect mix of terrain for skiers and snowboarders, and cozy lodges for comfortable stays. The author recommends checking out these deals for a quality winter getaway.
immigration lawyer in virginia experienced lawyer with twenty years of experience assisting clients with difficult cases. trustworthy counselor with a strong academic background and expertise in [industry specialties]. devoted to community service, transparent communication, and principled advocacy.
Generic base classes in ASP.NET are a powerful method for creating reusable and type-safe components. They allow for the definition of a base class with generic parameters that can be used by derived classes to provide specific types. This approach helps in creating flexible and maintainable code. Key concepts include defining a generic base class using the `class` keyword followed by type parameters in angle brackets, inheriting from generic base classes, and defining common use cases like data access layers, service layers, utilities, and helpers. Constraints can be applied to generic type parameters to ensure they meet certain requirements. This approach promotes code reuse and consistency across different types of data models in an ASP.NET application. For more information on using generic base classes in ASP.NET, please ask new york state divorce mediation.
Driving on a suspended license in Fairfax can lead to serious legal ramifications, including hefty fines and extended suspensions. It’s crucial to understand the reasons behind the suspension and to take the necessary steps to resolve the issue before getting back on the road. If you're in this situation, consulting with a DRIVING ON SUSPENDED LICENSE fairfax legal professional can provide valuable guidance. Let’s remind each other of the importance of responsible driving and staying informed about our license status.
The Rossmont Riser 210 water pump offers a reliable 850 GPH flow rate, quiet operation, low energy consumption, and durable construction. It's cost-effective for long-term use and has a peaceful environment. However, the setup process can be tricky, and clear instructions are recommended for newcomers. Overall, it enhances setup functionality. traffic lawyer alexandria va
Your trusted advocate in law, fighting relentlessly for your rights and delivering results that matter. Let's turn your legal challenges into victories together!
The Rossmont Riser 210 is a reliable water pump with an 850 GPH capacity, suitable for various tank sizes and setups. It offers quiet operation, energy efficiency, and adjustable flow rates. Installation is straightforward and the build quality is robust. However, it may be larger for smaller setups and require occasional maintenance.
manassas reckless driving lawyer Fighting for your rights, one case at a time. With a proven track record and unwavering dedication, I turn legal challenges into victories. Let's navigate the law together!
Great post! Navigating traffic violations can be stressful, especially in Hanover, VA. Having a knowledgeable Traffic Lawyer Hanover VA on your side can make a significant difference. They can help reduce fines, minimize points on your license, and even negotiate for lesser charges. If anyone is facing a traffic ticket in Hanover, I highly recommend seeking legal advice to understand your options. Thanks for sharing this valuable information!
Post a Comment