Parameter::DefaultValue Property
Specifies a default value for the parameter, should the value that the parameter is bound to be uninitialized when the Evaluate method is called.
Assembly: System.Web (in System.Web.dll)
The DefaultValue property is used in scenarios where the parameter is bound to a value, but the value is nullptr or cannot be resolved when the Parameter object is evaluated.
If the DefaultValue property of the parameter is changed, the OnParameterChanged method is called.
The following code example demonstrates how to retrieve a single data record using an ObjectDataSource control and display it in a DetailsView control. The ObjectDataSource control retrieves a specific employee record by calling the GetEmployee method of the EmployeeLogic class. The GetEmployee method requires an employee ID parameter. The ObjectDataSource control uses a QueryStringParameter object in its SelectParameters collection to pass an ID to the GetEmployee method in this example.
To view the example implementation of the EmployeeLogic class and the GetEmployee method, see the ObjectDataSource class overview.
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.