ASP.NET 4 Unleashed

Using the ASP.NET ControlParameter Object

You use the ControlParameter object to represent the value of a control property. You can use it to represent the value of any control contained in the same page as the SqlDataSource control.

The ControlParameter object includes all the properties of the Parameter object and these additional properties:

• ControlID— The ID of the control that the parameter represents.

• PropertyName— The name of the property that the parameter represents.

For example, the page in Listing 9.17 includes a DropDownList control and a DetailsView control. When you select a movie from the DropDownList, details for the movie display in the DetailsView control (see Figure 9.10).

Figure 9.10. Show matching movies for each movie ...