Skip Clause (Visual Basic)
Bypasses a specified number of elements in a collection and then returns the remaining elements.
Skip count
Parts
- count
Required. A value or an expression that evaluates to the number of elements of the sequence to skip.
Remarks
The Skip clause causes a query to bypass elements at the beginning of a results list and return the remaining elements. The number of elements to skip is identified by the count parameter.
You can use the Skip clause with the Take clause to return a range of data from any segment of a query. To do this, pass the index of the first element of the range to the Skip clause and the size of the range to the Take clause.
When you use the Skip clause in a query, you may also need to ensure that the results are returned in an order that will enable the Skip clause to bypass the intended results. For more information about ordering query results, see Order By Clause (Visual Basic).
You can use the SkipWhile clause to specify that only certain elements are ignored, depending on a supplied condition.
Example
The following code example uses the Skip clause together with the Take clause to return data from a query in pages. The GetCustomers function uses the Skip clause to bypass the customers in the list until the supplied starting index value, and uses the Take clause to return a page of customers starting from that index value.
Public Sub PagingSample()
Dim pageNumber As Integer = 0
Dim pageSize As Integer = 10
Dim customersPage = GetCustomers(pageNumber * pageSize, pageSize)
Do While customersPage IsNot Nothing
Console.WriteLine(vbCrLf & "Page: " & pageNumber + 1 & vbCrLf)
For Each cust In customersPage
Console.WriteLine(cust.CustomerID & ", " & cust.CompanyName)
Next
Console.WriteLine(vbCrLf)
pageNumber += 1
customersPage = GetCustomers(pageNumber * pageSize, pageSize)
Loop
End Sub
Public Function GetCustomers(ByVal startIndex As Integer, _
ByVal pageSize As Integer) As List(Of Customer)
Dim customers = GetCustomerList()
Dim returnCustomers = From cust In customers _
Skip startIndex Take pageSize
If returnCustomers.Count = 0 Then Return Nothing
Return returnCustomers
End Function
See Also
Concepts
Introduction to LINQ in Visual Basic
Reference
Order By Clause (Visual Basic)
Skip While Clause (Visual Basic)