ObjectParameter Constructors

public:
 ObjectParameter(System::String ^ name, System::Object ^ value);

public ObjectParameter(string name, object value);

new System.Data.Objects.ObjectParameter : string * obj -> System.Data.Objects.ObjectParameter

Public Sub New (name As String, value As Object)

Parameters

Exceptions

Examples

This example adds new parameters to the collection. It iterates through the ObjectParameterCollection and displays the name, the type and the 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

This constructor creates a parameter from the specified name and value. The type of the parameter is inferred from the value.

When added to the ObjectParameterCollection, the parameter name cannot be changed. The parameter value can be changed through the Value property. After the query has been compiled, the value cannot be changed. For more information, see Query Builder Methods.

See also

• Querying Data as Objects and Shaping Results (Entity Framework)

public:
 ObjectParameter(System::String ^ name, Type ^ type);

public ObjectParameter(string name, Type type);

new System.Data.Objects.ObjectParameter : string * Type -> System.Data.Objects.ObjectParameter

Public Sub New (name As String, type As Type)

Parameters

Exceptions

Remarks

When instantiated, the parameter name cannot be changed. The parameter value can be set or changed through the Value property. After the query has been compiled, the value cannot be changed. For more information, see Query Builder Methods.