Call Exit Branching Statements
2.13.2 Branching Statements
Visual Basic .NET supports a number of branching statements that interrupt the sequential flow of program execution and instead allow it to jump from one portion of a program to another. These can be either conditional statements such as If or Select Case or unconditional such as Call and Exit .2.13.2.1 Call
The Call statement invokes a subroutine or function. For example: Call SomeMethod When the invoked subroutine or function finishes, execution continues with the statement following the Call statement. If a function is invoked, the functions return value is discarded. The Call statement is redundant because subroutines and functions can be invoked simply by naming them: SomeMethod2.13.2.2 Exit
The Exit statement causes execution to exit the block in which the Exit statement appears. It is generally used to prematurely break out of a loop or procedure when some unusual condition occurs. The Exit statement should be avoided when possible because it undermines the structure of the block in which it appears. For example, the exit conditions of a For loop should be immediately apparent simply by looking at the For statement. It should not be necessary to read through the entire loop to determine if there are additional circumstances under which the loop might exit. If a given For loop truly needs an Exit statement, investigate whether a different loop construct would be better suited to the task. If a given procedure truly needs an Exit statement, investigate whether the procedure is factored appropriately. The Exit statement has a different form for each type of block in which it can be used, as listed here: Exit Do Exits a Do loop. Execution continues with the first statement following the Loop statement. Exit For Exits a For loop. Execution continues with the first statement following the Next statement. Exit Function 55 Exits a function. Execution continues with the first statement following the statement that called the function. Exit Property Exits a property get or property set procedure. Execution continues with the first statement following the statement that invoked the property get or property set procedure. Exit Sub Exits a subroutine. Execution continues with the first statement following the statement that called the subroutine. Exit Try Exits the Try clause of a Try block. If the Try block has a Finally clause, execution continues with the first statement in the Finally clause. If the Try block does not have a Finally clause, execution continues with the first statement following the Try block.2.13.2.3 Goto
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» VB.NET - (O'Reilly) Programming Visual Basic NET
» What Is the Microsoft .NET Framework?
» hello, world An Example Visual Basic .NET Program
» Hello, Windows An Example Visual Basic .NET Program
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» Source Files Identifiers The Visual Basic .NET Language
» Numeric Literals String Literals Character Literals
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» The Namespace Statement The Imports Statement
» Symbolic Constants Scope The Visual Basic .NET Language
» Access Modifiers Assignment The Visual Basic .NET Language
» Unary Operators Arithmetic Operators
» Relational Operators Operators and Expressions
» String-Concatenation Operators Bitwise Operators
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» Call Exit Branching Statements
» Goto If RaiseEvent Branching Statements
» Return Select Case Branching Statements
» For Each Iteration Statements
» Object Instantiation and New Constructors
» Handling Events Inheritance Classes
» Passing arrays as parameters
» Variable-length parameter lists Main method
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» The MyBase Keyword Nested Classes Destructors
» Interfaces The Visual Basic .NET Language
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» The Graphics Class 2-D Graphics Programming with GDI+
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» The PrintPageEventArgs Class Printing
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» Summary Windows Forms I: Developing Desktop Applications
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» Control Events Windows Forms II: Controls, Common Dialog Boxes, and Menus
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» Summary Windows Forms II: Controls, Common Dialog Boxes, and Menus
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» The Button control Web Controls
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» HTML Controls Handling Control Events
» Programmatically Instantiating Controls More About Server Controls
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» Using Directives to Modify Web Page Compilation
» The Server Object ASP.NET Objects: Interacting with the Framework
» The Application Object The Session Object The Cache Object The Request Object
» The Response Object ASP.NET Objects: Interacting with the Framework
» Discovering Browser Capabilities ASP.NET and Web Forms: Developing Browser-Based Applications
» The Session Object Maintaining State
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» Session and Application Startup and Shutdown global.asax Compiles to a Class
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» User Controls Designing Custom Controls
» Creating a custom server control using Visual Studio .NET
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» Summary ASP.NET and Web Forms: Developing Browser-Based Applications
» The WebService Attribute The WebMethod Attribute
» Testing a Web Service with a Browser
» Consuming a Web Service in Visual Studio .NET
» Consuming a Web Service in Notepad
» Synchronous Versus Asynchronous Calls
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» A Brief History of Universal Data Access Managed Providers
» Connecting to a SQL Server Database
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» The DataSet Class Finding Tables
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» Typed DataSets ADO.NET: Developing Database Applications
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