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what are the Types of controls in WPF?

Posted By :Narayanan     Posted Date :July 26, 2012    Points :40   Category :WPF 
Content Control
Item Control
Layout Control

You can also find related Interview Question to what are the Types of controls in WPF?  below: 

How many types of validation controls are provided by ASP.NET ?

  
There are six main types of validation controls:-

RequiredFieldValidator: It checks whether the control have any value. It's used when you want the control should not be empty.

RangeValidator: It checks if the value in validated control is in that specific range.

CompareValidator: It checks that the value in controls should match the value in other control.

RegularExpressionValidator: When we want the control value should match with a specific regular expression.

CustomValidator: It is used to define UserDefined validation.

ValidationSummary: It displays summary of all current validation errors. (More...)

How many types of validation controls are provided by ASP.NET ?

  
There are six main types of validation controls :-

RequiredFieldValidator
It checks whether the control have any value. It's used when you want the control should
not be empty.

RangeValidator
It checks if the value in validated control is in that specific range. Example
TxtCustomerCode should not be more than eight length.

CompareValidator
It checks that the value in controls should match some specific value. Example Textbox
TxtPie should be equal to 3.14.

RegularExpressionValidator
When we want the control value should match with a specific regular expression.

CustomValidator
It is used to define UserDefined validation.

ValidationSummary
It displays summary of all current validation errors.
Note:- It's rare that some one will ask step by step all the validation controls. Rather they
will ask for what type of validation which validator will be used. Example in one of the
interviews i was asked how you display summary of all errors in the validation
control...just uttered one word Validation summary. (More...)

How many types of controls in ASP.Net?

  
1) User Control
2) Custom Control
3) Web parts (More...)

what are the Types of controls in WPF?

  
Content Control
Item Control
Layout Control
(More...)

What are server controls?

  
ASP.NET server controls are components that run on the server and encapsulate user-interface and other related functionality. They are used in ASP.NET pages and in ASP.NET code-behind classes. (More...)

All types in C# implicitly derive from.........

  
System.Object Class. System.Object is the parent class of all .NET classes (More...)

What are the types of indexes available with SQL Server?

  
There are basically two types of indexes that we use with the SQL Server. Clustered and the Non-Clustered. (More...)

Different Types of Remote Objects?

  
The remoting infrastructure allows you to create two distinct types of remote objects.

1.Client-activated objects - A client-activated object is a server-side object whose creation and destruction is controlled by the client application. An instance of the remote object is created when the client calls the new operator on the server object. This instance lives as long as the client needs it, and lives across one to many method calls. The object will be subject to garbage collection once it''s determined that no other clients need it.

2.Server-activated objects - A server-activated object''s lifetime is managed by the remote server, not the client that instantiates the object. This differs from the client-activated object, where the client governs when the object will be marked for finalization. It is important to understand that the server-activated objects are not created when a client calls New or Activator.GetObject. They are rather created when the client actually invokes a method on the proxy. There are two types of server activated objects. They are:

I. Single call . Single-call objects handle one, and only one, request coming from a client. When the client calls a method on a single call object, the object constructs itself, performs whatever action the method calls for, and the object is then subject to garbage collection. No state is held between calls, and each call (no matter what client it came from) is called on a new object instance.

II.Singleton - The difference in a singleton and single call lies in lifetime management. While single-call objects are stateless in nature, singletons are stateful objects, meaning that they can be used to retain state across multiple method calls. A singleton object instance serves multiple clients, allowing those clients to share data among themselves. (More...)

what are value types and reference types?

  
Value type - bool, byte, chat, decimal, double, enum , float, int, long, sbyte, short, strut, uint, ulong, ushort
Value types are stored in the Stack
Reference type - class, delegate, interface, object, string
Reference types are stored in the Heap (More...)

What are the types of threading models?

  
. Single Threading: This is the simplest and most common threading
model where a single thread corresponds to your entire application's
process.
Apartment Threading (STA): This allows multiple threads to exist in a
single application. In single threading apartment (STA), each thread
is isolated in it's own apartment. The process may contain multiple
threads (apartments) however when an object is created in a
thread (i.e. apartment) it stays within that
apartment. If any communication needs to occur between different
threads (i.e. different apartments) then we must marshal the first
thread object to the second thread.
Free Threading: The most complex threading model. Unlike STA,
threads are not confined to their own apartments. Multiple treads can
make calls to the same methods and same components at the
same time. (More...)

What is the difference between login controls and Forms authentication?

  
Login controls are an easy way to implement Forms authentication without having to write any code. For example, the Login control performs the same functions you would normally perform when using the FormsAuthentication class—prompt for user credentials, validate them, and issue the authentication ticket—but with all the functionality wrapped in a control that you can just drag from the Toolbox in Visual Studio. Under the covers, the login control uses the FormsAuthentication class (for example, to issue the authentication ticket) and ASP.NET membership (to validate the user credentials). Naturally, you can still use Forms authentication yourself, and applications you have that currently use it will continue to run. (More...)

How many types of tables are present in SQL SERVER?

  
There are 2 types of temporary tables, local and global in sql server.

Local temporary tables are created using a single pound (#) sign and are visible to a single connection and automatically dropped when that connection ends.

Global temporary tables are created using a double pound (##) sign and are visible across multiple connections and users and are automatically dropped when all SQL sessions stop referencing the global temporary table. (More...)

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