다음을 통해 공유

  • 아티클

DBNull.IConvertible.ToType Method

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

This API supports the .NET Framework infrastructure and is not intended to be used directly from your code.

Converts the current DBNull object to the specified type.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

Syntax

'Declaration
Private Function ToType ( _
    type As Type, _
    provider As IFormatProvider _
) As Object Implements IConvertible.ToType

Object IConvertible.ToType(
    Type type,
    IFormatProvider provider
)

Parameters

  • provider
    Type: System.IFormatProvider
    An object that implements the IFormatProvider interface and is used to augment the conversion. If nulla null reference (Nothing in Visual Basic) is specified, format information is obtained from the current culture.

Return Value

Type: System.Object
The boxed equivalent of the current DBNull object, if that conversion is supported; otherwise, an exception is thrown and no value is returned.

Implements

IConvertible.ToType(Type, IFormatProvider)

Exceptions

Exception Condition
InvalidCastException

This conversion is not supported for the DBNull type.
ArgumentNullException

type is nulla null reference (Nothing in Visual Basic).

Remarks

Three conversions are supported: If the type parameter specifies Object or DBNull, the return value is the current DBNull object itself. If the type parameter specifies String, the return value is the string returned by the ToString method.

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

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