What are delegates in ASP.NET
Asked by Madhuri Sawant Last Modified
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Delegates are type safe function pointers or callbacks. Delegate is a class that holds a reference to a method or function. Delegate class has a signature an it can only refer those methods whose signature is compliant with the class. Delegates are of two types 1) Unicast 2)Multicast
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A delegate is a class that can hold a reference to a method. Unlike other classes, a delegate class has a signature, and it can hold references only to methods that match its signature. A delegate is thus equivalent to a type-safe function pointer or a callback. For delegation to work, ASP.NET must...
read more A delegate is a class that can hold a reference to a method. Unlike other classes, a delegate class has a signature, and it can hold references only to methods that match its signature. A delegate is thus equivalent to a type-safe function pointer or a callback. For delegation to work, ASP.NET must be able to authenticate against the remote server using the credentials of the client you wish to delegate. However, there are numerous factors that determine if delegation can occur, such as Internet Information Services (IIS) authentication scheme, ASP.NET process identity, and the operating systems of the machines involved. In asp.net we are using delegates to create custom events for custom controls.For example, custom pager control most likely needs to have Page Changed event. read less
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Vikram Haibatti
IT Professional Trainer with 9 years of experience in IT Industry
Delegates are abstract Collection of Members with the help of Delegate u can handle events in C# and using delegate u can pass method as parameter with in the delegate.
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Harish Sharma
7 yrs Experience along with Microsoft Certified Technology Specialist Trainer for .Net with C# as Language
Delegate is a class that can hold a reference to a method or a function. Delegate class has a signature and it can only reference those methods whose signature is compliant with the class. Delegates are type-safe functions pointers or callbacks.
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For the main Usage is how to read the data from the user control; for reading the data a delegate is used
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well assume you are the author of a button control. You need to call user code when the button is clicked. The user could name his method anything and this method could belong to any class. How does Microsoft know what I am going to name my class and method? A delegate encapsulates the things needed...
read more well assume you are the author of a button control. You need to call user code when the button is clicked. The user could name his method anything and this method could belong to any class. How does Microsoft know what I am going to name my class and method? A delegate encapsulates the things needed for making the call into an object. What are the things needed for making this call? Your type details like class name, this pointer etc (_target variable) Your method details like method signature, address etc (_methodPtr variable) Reference: http://www.arungudelli.com/csharp/delegates-and-events-in-csharp/ read less
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A delegate is a class that can hold a reference to a method. Unlike other classes, a delegate class has a signature, and it can hold references only to methods that match its signature. A delegate is thus equivalent to a type-safe function pointer or a callback.
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Thank You for your question Madhuri..... A delegate is a reference type that holds the reference of the class method. Thank You, Team DishaaPro www.dishaapro.com
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If you are familiar with c++, its function pointer. It works as its literal meaning, sharing specific work to some method. With hlp of it you can pass function as parameter can achieve multi threading
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