ObjectQuery<T>.Execute(MergeOption) ObjectQuery<T>.Execute(MergeOption) ObjectQuery<T>.Execute(MergeOption) Method

Definition

Executes the object query with the specified merge option.

public:
 System::Data::Objects::ObjectResult<T> ^ Execute(System::Data::Objects::MergeOption mergeOption);
public System.Data.Objects.ObjectResult<T> Execute (System.Data.Objects.MergeOption mergeOption);
override this.Execute : System.Data.Objects.MergeOption -> System.Data.Objects.ObjectResult<'T>

Parameters

mergeOption
MergeOption MergeOption MergeOption

The MergeOption to use when executing the query. The default is AppendOnly.

Returns

An ObjectResult<T> that contains a collection of entity objects returned by the query.

Examples

This example is based on the AdventureWorks Sales Model. The example returns an ObjectResult<T> from Execute method. Then it gets an enumerator and iterates through the query results. At the end it releases the enumerator and the ObjectResult<T> object.

using (AdventureWorksEntities context =
    new AdventureWorksEntities())
{
    ObjectSet<Product> query = context.Products;
    ObjectResult<Product> queryResults = null;

    System.Collections.IEnumerator enumerator = null;
    try
    {
        queryResults = query.Execute(MergeOption.AppendOnly);

        // Get the enumerator.
        enumerator = ((System.Collections.IEnumerable)queryResults).GetEnumerator();

        // Iterate through the query results.
        while (enumerator.MoveNext())
        {
            Product product = (Product)enumerator.Current;
            Console.WriteLine("{0}", product.Name);
        }
        // Dispose the enumerator
        ((IDisposable)enumerator).Dispose();
    }
    finally
    {
        // Dispose the query results and the enumerator.
        if (queryResults != null)
        {
            queryResults.Dispose();
        }
        if (enumerator != null)
        {
            ((IDisposable)enumerator).Dispose();
        }
    }
}
Using context As New AdventureWorksEntities()
    Dim query As ObjectSet(Of Product) = context.Products
    Dim queryResults As ObjectResult(Of Product) = Nothing

    Dim enumerator As System.Collections.IEnumerator = Nothing
    Try
        queryResults = query.Execute(MergeOption.AppendOnly)

        ' Get the enumerator. 
        enumerator = DirectCast(queryResults, System.Collections.IEnumerable).GetEnumerator()

        ' Iterate through the query results. 
        While enumerator.MoveNext()
            Dim product As Product = DirectCast(enumerator.Current, Product)
            Console.WriteLine("{0}", product.Name)
        End While
        ' Dispose the enumerator 
        DirectCast(enumerator, IDisposable).Dispose()
    Finally
        ' Dispose the query results and the enumerator. 
        If queryResults IsNot Nothing Then
            queryResults.Dispose()
        End If
        If enumerator IsNot Nothing Then
            DirectCast(enumerator, IDisposable).Dispose()
        End If
    End Try
End Using

Remarks

The default merge option for object queries is AppendOnly. For more information, see Identity Resolution, State Management, and Change Tracking.

Applies to

See also