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This article will share with you what operators are related to VB.NET type conversion. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

VB.NET type conversion provides two transformation operators: DirectCast and CType

DirectCast is * because it usually produces more efficient code and better preserves type safety. However, DirectCast can only be used to convert a reference type to another type, while the CType operator can be used to convert a reference type or value type to another type.

Using the CType operator to convert a primitive type to a primitive type is very useful and common, so VB.NET provides some transformation operators specifically for this purpose:

CBool: converts an object to a Boolean

CByte: converts an object to a Byte

CChar converts an object to Char

CDate converts an object to DateTime

CDbl converts an object to Double

CDec converts an object to Decimal

CInt converts an object to Int32

CLng converts an object to Int64

CObj converts an object to Object

CShort converts an object to Int16

CSng converts an object to Single

CStr converts an object to String

If DirectCast and CType and the above convenient transformation operator cannot find a way to convert the specified object to the desired type, an InvalidCastException exception will be thrown.

Type of test object

Because the DirectCast and CType operators attempt to convert an object from one type to another. If the transformation is not compatible, an InvalidCastException exception will be thrown, and in order for the program to recover from the exception, the developer must take advantage of the exception handling mechanism. If we want to avoid using exception handling code, we can use TypeOf....Is expressions to check whether the object is compatible with the specified type. The result is a Boolean value.

Example:

TypeOf TEST Is Object

Where TEST is the reference to be checked and the type specified by Object

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