List.InsertRange Method
Assembly: mscorlib (in mscorlib.dll)
Parameters
- index
The zero-based index at which the new elements should be inserted.
- collection
The collection whose elements should be inserted into the List. The collection itself cannot be a null reference (Nothing in Visual Basic), but it can contain elements that are a null reference (Nothing in Visual Basic), if type T is a reference type.
| Exception type | Condition |
|---|---|
| collection is a null reference (Nothing in Visual Basic). |
|
| index is less than 0. -or- index is greater than Count. |
List accepts a null reference (Nothing in Visual Basic) as a valid value for reference types and allows duplicate elements.
If the new Count (the current Count plus the size of the collection) will be greater than Capacity, the capacity of the List is increased by automatically reallocating the internal array to accommodate the new elements, and the existing elements are copied to the new array before the new elements are added.
If index is equal to Count, the elements are added to the end of List.
The order of the elements in the collection is preserved in the List.
This method is an O(n + m) operation, where n is the number of elements to be added and m is Count.
The following code example demonstrates InsertRange method and various other methods of the List class that act on ranges. After the list has been created and populated with the names of several peaceful plant-eating dinosaurs, the InsertRange method is used to insert an array of three ferocious meat-eating dinosaurs into the list, beginning at index location 3.
using System; using System.Collections.Generic; public class Example { public static void Main() { string[] input = { "Brachiosaurus", "Amargasaurus", "Mamenchisaurus" }; List<string> dinosaurs = new List<string>(input); Console.WriteLine("\nCapacity: {0}", dinosaurs.Capacity); Console.WriteLine(); foreach( string dinosaur in dinosaurs ) { Console.WriteLine(dinosaur); } Console.WriteLine("\nAddRange(dinosaurs)"); dinosaurs.AddRange(dinosaurs); Console.WriteLine(); foreach( string dinosaur in dinosaurs ) { Console.WriteLine(dinosaur); } Console.WriteLine("\nRemoveRange(2, 2)"); dinosaurs.RemoveRange(2, 2); Console.WriteLine(); foreach( string dinosaur in dinosaurs ) { Console.WriteLine(dinosaur); } input = new string[] { "Tyrannosaurus", "Deinonychus", "Velociraptor"}; Console.WriteLine("\nInsertRange(3, input)"); dinosaurs.InsertRange(3, input); Console.WriteLine(); foreach( string dinosaur in dinosaurs ) { Console.WriteLine(dinosaur); } Console.WriteLine("\noutput = dinosaurs.GetRange(2, 3).ToArray()"); string[] output = dinosaurs.GetRange(2, 3).ToArray(); Console.WriteLine(); foreach( string dinosaur in output ) { Console.WriteLine(dinosaur); } } } /* This code example produces the following output: Capacity: 3 Brachiosaurus Amargasaurus Mamenchisaurus AddRange(dinosaurs) Brachiosaurus Amargasaurus Mamenchisaurus Brachiosaurus Amargasaurus Mamenchisaurus RemoveRange(2, 2) Brachiosaurus Amargasaurus Amargasaurus Mamenchisaurus InsertRange(3, input) Brachiosaurus Amargasaurus Amargasaurus Tyrannosaurus Deinonychus Velociraptor Mamenchisaurus output = dinosaurs.GetRange(2, 3).ToArray() Amargasaurus Tyrannosaurus Deinonychus */
Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.