Retrieves a value for a specified data source information property.
Namespace: Microsoft.VisualStudio.Data
Assembly: Microsoft.VisualStudio.Data (in Microsoft.VisualStudio.Data.dll)
Syntax
'宣言
Protected Overridable Function RetrieveValue ( _
propertyName As String _
) As Object
'使用
Dim propertyName As String
Dim returnValue As Object
returnValue = Me.RetrieveValue(propertyName)
protected virtual Object RetrieveValue(
string propertyName
)
protected:
virtual Object^ RetrieveValue(
String^ propertyName
)
protected function RetrieveValue(
propertyName : String
) : Object
Parameters
propertyName
Type: System.StringThe name of property whose value is retrieved.
Return Value
Type: System.Object
Returns the value of the data source information property, or returns a null reference (Nothing in Visual Basic) if the property is not supported.
Exceptions
| Exception | Condition |
|---|---|
| ArgumentNullException | The propertyName parameter is null. |
Remarks
The base class keeps a cache of values that have been retrieved, and as such only calls this method once per data source information property. Thus, the implementation of this method need not cache values itself.
The base implementation of this method simply returns a null reference (Nothing in Visual Basic).
Permissions
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.