• Articolo

Queryable.Skip<TSource> Method

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Bypasses a specified number of elements in a sequence and then returns the remaining elements.

Namespace:  System.Linq
Assembly:  System.Core (in System.Core.dll)

Syntax

'Declaration
<ExtensionAttribute> _
Public Shared Function Skip(Of TSource) ( _
    source As IQueryable(Of TSource), _
    count As Integer _
) As IQueryable(Of TSource)

public static IQueryable<TSource> Skip<TSource>(
    this IQueryable<TSource> source,
    int count
)

Type Parameters

  • TSource
    The type of the elements of source.

Parameters

  • count
    Type: System.Int32
    The number of elements to skip before returning the remaining elements.

Return Value

Type: System.Linq.IQueryable<TSource>
An IQueryable<T> that contains elements that occur after the specified index in the input sequence.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IQueryable<TSource>. When you use instance method syntax to call this method, omit the first parameter.

Exceptions

Exception Condition
ArgumentNullException

source is nulla null reference (Nothing in Visual Basic).

Remarks

The Skip<TSource>(IQueryable<TSource>, Int32) method generates a MethodCallExpression that represents calling Skip<TSource>(IQueryable<TSource>, Int32) itself as a constructed generic method. It then passes the MethodCallExpression to the CreateQuery(Expression) method of the IQueryProvider represented by the Provider property of the source parameter.

The query behavior that occurs as a result of executing an expression tree that represents calling Skip<TSource>(IQueryable<TSource>, Int32) depends on the implementation of the type of the source parameter. The expected behavior is that it skips the first count elements in source and returns the remaining elements.

Examples

The following code example demonstrates how to use Skip<TSource>(IQueryable<TSource>, Int32) to skip a specified number of elements in a sorted array and return the remaining elements.

      Dim grades() As Integer = {59, 82, 70, 56, 92, 98, 85}

      ' Sort the grades in descending order and
      ' get all except the first three.
      Dim lowerGrades = grades.AsQueryable() _
          .OrderByDescending(Function(g) g) _
          .Skip(3)

      Dim output As New System.Text.StringBuilder
      output.AppendLine("All grades except the top three are:")
      For Each grade As Integer In lowerGrades
         output.AppendLine(grade)
      Next

      ' Display the output.
      outputBlock.Text &= output.ToString() & vbCrLf

      ' This code produces the following output:

      ' All grades except the top three are:
      ' 82
      ' 70
      ' 59
      ' 56


         int[] grades = { 59, 82, 70, 56, 92, 98, 85 };

         // Sort the grades in descending order and
         // get all except the first three.
         IEnumerable<int> lowerGrades =
             grades.AsQueryable().OrderByDescending(g => g).Skip(3);

         outputBlock.Text += "All grades except the top three are:" + "\n";
         foreach (int grade in lowerGrades)
            outputBlock.Text += grade + "\n";

         /*
             This code produces the following output:

             All grades except the top three are:
             82
             70
             59
             56
         */

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.