ObjectResult<T>.GetEnumerator Method ()

 

Returns an enumerator that iterates through the query results.

Namespace:   System.Data.Objects
Assembly:  System.Data.Entity (in System.Data.Entity.dll)

public IEnumerator<T> GetEnumerator()

Return Value

Type: System.Collections.Generic.IEnumerator<T>

An enumerator that iterates through the query results.

The enumerator must be disposed when no longer needed. Using the foreach statement (For Each in Visual Basic) ensures that the enumerator is correctly disposed when iteration over the results is complete.

The example in this topic is based on the AdventureWorks Sales Model. The example returns an ObjectResult<T> from the 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();
        }
    }
}

.NET Framework
Available since 3.5
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