Represents a nonexistent value. This class cannot be inherited. More...

Inheritance diagram for System.DBNull:

Collaboration diagram for System.DBNull:

Public Member Functions
void	GetObjectData (SerializationInfo info, StreamingContext context)
	Implements the T:System.Runtime.Serialization.ISerializable interface and returns the data needed to serialize the T:System.DBNull object. More...

override string	ToString ()
	Returns an empty string (F:System.String.Empty). More...

string	ToString (IFormatProvider provider)
	Returns an empty string using the specified T:System.IFormatProvider. More...

TypeCode	GetTypeCode ()
	Gets the T:System.TypeCode value for T:System.DBNull. More...

Static Public Attributes
static readonly DBNull	Value = new DBNull()
	Represents the sole instance of the T:System.DBNull class. More...

Detailed Description

Represents a nonexistent value. This class cannot be inherited.

Definition at line 10 of file DBNull.cs.

Member Function Documentation

◆ GetObjectData()

void System.DBNull.GetObjectData	(	SerializationInfo	info,
		StreamingContext	context
	)

Implements the T:System.Runtime.Serialization.ISerializable interface and returns the data needed to serialize the T:System.DBNull object.

Parameters

info	A T:System.Runtime.Serialization.SerializationInfo object containing information required to serialize the T:System.DBNull object.
context	A T:System.Runtime.Serialization.StreamingContext object containing the source and destination of the serialized stream associated with the T:System.DBNull object.

Exceptions

T:System.ArgumentNullException info is null.

Implements System.Runtime.Serialization.ISerializable.

Definition at line 30 of file DBNull.cs.

◆ GetTypeCode()

TypeCode System.DBNull.GetTypeCode ( )

Gets the T:System.TypeCode value for T:System.DBNull.

Returns: The T:System.TypeCode value for T:System.DBNull, which is F:System.TypeCode.DBNull.

Implements System.IConvertible.

Definition at line 53 of file DBNull.cs.

◆ ToString() [1/2]

override string System.DBNull.ToString ( )

Returns an empty string (F:System.String.Empty).

Returns: An empty string (F:System.String.Empty).

Definition at line 37 of file DBNull.cs.

◆ ToString() [2/2]

string System.DBNull.ToString ( IFormatProvider provider )

Returns an empty string using the specified T:System.IFormatProvider.

Parameters

provider The T:System.IFormatProvider to be used to format the return value.-or- null to obtain the format information from the current locale setting of the operating system.

Returns: An empty string (F:System.String.Empty).

Implements System.IConvertible.

Definition at line 46 of file DBNull.cs.

Member Data Documentation

◆ Value

readonly DBNull System.DBNull.Value = new DBNull()

static

Represents the sole instance of the T:System.DBNull class.

Definition at line 13 of file DBNull.cs.

The documentation for this class was generated from the following file:

D:/All cs/System/DBNull.cs

Public Member Functions

Static Public Attributes