ObjectQuery.Parameters Property

Reference

Definition

Namespace:: System.Data.Objects

Assembly:: System.Data.Entity.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Gets the parameter collection for this object query.

public:
 property System::Data::Objects::ObjectParameterCollection ^ Parameters { System::Data::Objects::ObjectParameterCollection ^ get(); };

public System.Data.Objects.ObjectParameterCollection Parameters { get; }

member this.Parameters : System.Data.Objects.ObjectParameterCollection

Public ReadOnly Property Parameters As ObjectParameterCollection

Property Value

ObjectParameterCollection

The parameter collection for this ObjectQuery<T>.

Examples

This example adds new parameters to the collection and then gets the parameter collection for this ObjectQuery<T>. Then it iterates through the ObjectParameterCollection and displays the name, type, and value of each parameter in the collection.

using (AdventureWorksEntities context =
    new AdventureWorksEntities())
{
    string queryString =
        @"SELECT VALUE contact FROM AdventureWorksEntities.Contacts
        AS contact WHERE contact.LastName = @ln
        AND contact.FirstName = @fn";

    ObjectQuery<Contact> contactQuery =
        new ObjectQuery<Contact>(queryString, context);

    // Add parameters to the collection.
    contactQuery.Parameters.Add(new ObjectParameter("ln", "Adams"));
    contactQuery.Parameters.Add(new ObjectParameter("fn", "Frances"));

    ObjectParameterCollection objectParameterCollection =
        contactQuery.Parameters;

    // Iterate through the ObjectParameterCollection.
    foreach (ObjectParameter result in objectParameterCollection)
    {
        Console.WriteLine("{0} {1} {2}", result.Name,
            result.Value,
            result.ParameterType);
    }
}

Remarks

Use the returned ObjectParameterCollection to specify parameters that are passed to the query. For more information, see Query Builder Methods.

Applies to

Share via