Convert.IsDBNull Method
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Returns an indication whether the specified object is of type DBNull.
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Syntax
Public Shared Function IsDBNull ( _
value As Object _
) As Boolean
public static bool IsDBNull(
Object value
)
Parameters
- value
Type: System..::.Object
An object.
Return Value
Type: System..::.Boolean
true if value is of type DBNull; otherwise, false.
Remarks
The IsDBNull method tests whether the value parameter is equal to DBNull..::.Value. It is equivalent to the following code:
Return DBNull.Value.Equals(value)
return DBNull.Value.Equals(value);
Note
DBNull..::.Value is used to indicate a value that is missing. It is not equivalent to nullNothingnullptra null reference (Nothing in Visual Basic) or to String..::.Empty.
Version Information
Windows Phone OS
Supported in: 8.1, 8.0, 7.1, 7.0
Platforms
Windows Phone