Enumerable.ToArray<TSource> Method
Silverlight
Creates an array from a IEnumerable<T>.
Namespace: System.Linq
Assembly: System.Core (in System.Core.dll)
Type Parameters
- TSource
The type of the elements of source.
Parameters
- source
- Type: System.Collections.Generic.IEnumerable<TSource>
An IEnumerable<T> to create an array from.
Return Value
Type: TSource[]An array that contains the elements from the input sequence.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type IEnumerable<TSource>. When you use instance method syntax to call this method, omit the first parameter.| Exception | Condition |
|---|---|
| ArgumentNullException | source is null. |
The ToArray<TSource>(IEnumerable<TSource>) method forces immediate query evaluation and returns an array that contains the query results. You can append this method to your query in order to obtain a cached copy of the query results.
ToList<TSource> has similar behavior but returns a List<T> instead of an array.
The following code example demonstrates how to use ToArray<TSource> to force immediate query evaluation and return an array of results.
class Package
{
public string Company { get; set; }
public double Weight { get; set; }
}
public static void ToArrayEx1()
{
List<Package> packages =
new List<Package>
{ new Package { Company = "Coho Vineyard", Weight = 25.2 },
new Package { Company = "Lucerne Publishing", Weight = 18.7 },
new Package { Company = "Wingtip Toys", Weight = 6.0 },
new Package { Company = "Adventure Works", Weight = 33.8 } };
string[] companies = packages.Select(pkg => pkg.Company).ToArray();
foreach (string company in companies)
{
outputBlock.Text += company + "\n";
}
}
/*
This code produces the following output:
Coho Vineyard
Lucerne Publishing
Wingtip Toys
Adventure Works
*/
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.
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