StaticEqualsDetermines whether the specified object instances are considered equal.
The first object to compare.
The second object to compare.
true if the objects are considered equal; otherwise, false. If both objA and objB are null, the method returns true.
Gets a value indicating whether this DataValue contains a valid value. If HasValidValue is false, then either IsNullValue is true or HasDataError is true, but not both. If HasValidValue is true, the IsNullValue and HasDataError are both false.
Gets a value indicating whether this DataValue instance represents a null value, or, more precisely, an invalid value with a null data error.
Gets or sets the runtime value contained in this DataValue instance, as a boxed value. The getter returns null for reference types and default(T) for value types, if the HasValidValue is false. After setting a valid value HasValidValue will be true, HasDataError and IsNullValue will be false, and DataError will return null.
Sets this DataValue instance equal to another DataValue instance.
The other DataValue.
Makes this DataValue instance represent a null value. That is, an invalid value with a null data error. After the method call, HasValidValue will return false, IsNullValue will return true, and HasDataError will return false. The ValidValue property will be null or default(T).
StaticCreateCreates a DataValue instance of a given data type.
A non-null DataType instance.
A new DataValue instance of the given type, initially set to a null value.
Creates a DataValue instance of a given runtime type.
Generic type argument
A new DataValue instance of the given type, initially set to a null value.
Creates a DataValue instance of a given data type and with a provided initial value.
A non-null DataType instance.
The value. If null, the initial value will be null.
A new DataValue instance.
Creates a DataValue instance of a given runtime type and with a provided initial value.
Generic type argument
The initial value. If null, then IsNullValue will be true.
A new DataValue instance.
Creates a DataValue instance of a given runtime type and with a provided initial value. This method is redundant but useful in practice.
A new DataValue instance.
An abstract base class for flyweight data value containers. More precisely, a DataValue instance contains a value of a particular DataType, and thus every DataValue has a corresponding DataType. (This is not necessarily true for the methods marked Obsolete in this class.) Instances of the generic subclass are normally used, often explicitly, and this non-generic base class is provided only for convenience in contexts where the generic type is not known, or variable. Note that this class is intended as a flyweight, that is, as a reusable container. This means that it is not optimized for memory and is unsuitable for representing arrays or matrices of data values, where a separate DataValue instance is used for each cell. Consider using a more compact representation of the values for such purposes. The DataValue class is not serializable and should not be used for persistent storage.
Since
2.0