Articolo
11/18/2011

Information Class

Microsoft Silverlight will reach end of support after October 2021. Learn more.

The Information module contains the procedures used to return, test for, or verify information.

Inheritance Hierarchy

System.Object
Microsoft.VisualBasic.Information

Namespace: Microsoft.VisualBasic
Assembly: Microsoft.VisualBasic (in Microsoft.VisualBasic.dll)

Syntax

'Declaration
<StandardModuleAttribute> _
Public NotInheritable Class Information

[StandardModuleAttribute]
public sealed class Information

The Information type exposes the following members.

Methods

	Name	Description
	Equals(Object)	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	Erl	Returns an integer indicating the line number of the last executed statement. Read-only.
	Err	Contains information about run-time errors.
	Finalize	Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	IsArray	Returns a Boolean value indicating whether a variable points to an array.
	IsDate	Returns a Boolean value indicating whether an expression represents a valid Date value.
	IsDBNull	Returns a Boolean value indicating whether an expression evaluates to the System.DBNull class.
	IsError	Returns a Boolean value indicating whether an expression is an exception type.
	IsNothing	Returns a Boolean value indicating whether an expression has no object assigned to it.
	IsReference	Returns a Boolean value indicating whether an expression evaluates to a reference type.
	LBound	Returns the lowest available subscript for the indicated dimension of an array.
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)
	UBound	Returns the highest available subscript for the indicated dimension of an array.
	VarType	Returns an Integer value containing the data type classification of a variable.

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Remarks

This module supports the Visual Basic language keywords and run-time library members that provide error information, validate data, determine array bounds, and retrieve data type and color information.

Examples

The following example uses the VbTypeName function to return data type names for several variables.

Dim sysDateName As String = "System.DateTime"
Dim sysShortName As String = "Int16"
Dim sysBadName As String = "Nonsense"
Dim testVbName As String
testVbName = VbTypeName(sysDateName) 
' Returns "Date".
testVbName = VbTypeName(sysShortName) 
' Returns "Short".
testVbName = VbTypeName(sysBadName) 
' Returns Nothing.

Version Information

Silverlight

Supported in: 5, 4, 3

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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