List<T>.Insert(Int32, T) Method (System.Collections.Generic) (2023)

Inserts an element into the List<T> at the specified index.

public: virtual void Insert(int index, T item);
public void Insert (int index, T item);
abstract member Insert : int * 'T -> unitoverride this.Insert : int * 'T -> unit
Public Sub Insert (index As Integer, item As T)

Parameters

index
Int32

The zero-based index at which item should be inserted.

(Video) C# Generics - What they are, why they are useful, and how to create them

item
T

The object to insert. The value can be null for reference types.

Implements

Insert(Int32, T)

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Exceptions

ArgumentOutOfRangeException

(Video) Part 74 List collection class in c#

index is less than 0.

-or-

index is greater than Count.

Examples

The following example demonstrates how to add, remove, and insert a simple business object in a List<T>.

(Video) JeremyBytes - C# Generics - Part 1: Collections

using System;using System.Collections.Generic;// Simple business object. A PartId is used to identify the type of part// but the part name can change.public class Part : IEquatable<Part> { public string PartName { get; set; } public int PartId { get; set; } public override string ToString() { return "ID: " + PartId + " Name: " + PartName; } public override bool Equals(object obj) { if (obj == null) return false; Part objAsPart = obj as Part; if (objAsPart == null) return false; else return Equals(objAsPart); } public override int GetHashCode() { return PartId; } public bool Equals(Part other) { if (other == null) return false; return (this.PartId.Equals(other.PartId)); } // Should also override == and != operators. }public class Example{ public static void Main() { // Create a list of parts. List<Part> parts = new List<Part>(); // Add parts to the list. parts.Add(new Part() { PartName = "crank arm", PartId = 1234 }); parts.Add(new Part() { PartName = "chain ring", PartId = 1334 }); parts.Add(new Part() { PartName = "regular seat", PartId = 1434 }); parts.Add(new Part() { PartName = "banana seat", PartId = 1444 }); parts.Add(new Part() { PartName = "cassette", PartId = 1534 }); parts.Add(new Part() { PartName = "shift lever", PartId = 1634 }); // Write out the parts in the list. This will call the overridden ToString method // in the Part class. Console.WriteLine(); foreach (Part aPart in parts) { Console.WriteLine(aPart); } // Check the list for part #1734. This calls the IEquatable.Equals method // of the Part class, which checks the PartId for equality. Console.WriteLine("\nContains(\"1734\"): {0}", parts.Contains(new Part { PartId = 1734, PartName = "" })); // Insert a new item at position 2. Console.WriteLine("\nInsert(2, \"1834\")"); parts.Insert(2, new Part() { PartName = "brake lever", PartId = 1834 }); //Console.WriteLine(); foreach (Part aPart in parts) { Console.WriteLine(aPart); } Console.WriteLine("\nParts[3]: {0}", parts[3]); Console.WriteLine("\nRemove(\"1534\")"); // This will remove part 1534 even though the PartName is different, // because the Equals method only checks PartId for equality. parts.Remove(new Part() { PartId = 1534, PartName = "cogs" }); Console.WriteLine(); foreach (Part aPart in parts) { Console.WriteLine(aPart); } Console.WriteLine("\nRemoveAt(3)"); // This will remove the part at index 3. parts.RemoveAt(3); Console.WriteLine(); foreach (Part aPart in parts) { Console.WriteLine(aPart); } /* ID: 1234 Name: crank arm ID: 1334 Name: chain ring ID: 1434 Name: regular seat ID: 1444 Name: banana seat ID: 1534 Name: cassette ID: 1634 Name: shift lever Contains("1734"): False Insert(2, "1834") ID: 1234 Name: crank arm ID: 1334 Name: chain ring ID: 1834 Name: brake lever ID: 1434 Name: regular seat ID: 1444 Name: banana seat ID: 1534 Name: cassette ID: 1634 Name: shift lever Parts[3]: ID: 1434 Name: regular seat Remove("1534") ID: 1234 Name: crank arm ID: 1334 Name: chain ring ID: 1834 Name: brake lever ID: 1434 Name: regular seat ID: 1444 Name: banana seat ID: 1634 Name: shift lever RemoveAt(3) ID: 1234 Name: crank arm ID: 1334 Name: chain ring ID: 1834 Name: brake lever ID: 1444 Name: banana seat ID: 1634 Name: shift lever */ }}
Imports System.Collections.Generic' Simple business object. A PartId is used to identify the type of part ' but the part name can change. Public Class Part Implements IEquatable(Of Part) Public Property PartName() As String Get Return m_PartName End Get Set(value As String) m_PartName = Value End Set End Property Private m_PartName As String Public Property PartId() As Integer Get Return m_PartId End Get Set(value As Integer) m_PartId = Value End Set End Property Private m_PartId As Integer Public Overrides Function ToString() As String Return "ID: " & PartId & " Name: " & PartName End Function Public Overrides Function Equals(obj As Object) As Boolean If obj Is Nothing Then Return False End If Dim objAsPart As Part = TryCast(obj, Part) If objAsPart Is Nothing Then Return False Else Return Equals(objAsPart) End If End Function Public Overrides Function GetHashCode() As Integer Return PartId End Function Public Overloads Function Equals(other As Part) As Boolean _ Implements IEquatable(Of Part).Equals If other Is Nothing Then Return False End If Return (Me.PartId.Equals(other.PartId)) End Function ' Should also override == and != operators.End ClassPublic Class Example Public Shared Sub Main() ' Create a list of parts. Dim parts As New List(Of Part)() ' Add parts to the list. parts.Add(New Part() With { _ .PartName = "crank arm", _ .PartId = 1234 _ }) parts.Add(New Part() With { _ .PartName = "chain ring", _ .PartId = 1334 _ }) parts.Add(New Part() With { _ .PartName = "regular seat", _ .PartId = 1434 _ }) parts.Add(New Part() With { _ .PartName = "banana seat", _ .PartId = 1444 _ }) parts.Add(New Part() With { _ .PartName = "cassette", _ .PartId = 1534 _ }) parts.Add(New Part() With { _ .PartName = "shift lever", _ .PartId = 1634 _ }) ' Write out the parts in the list. This will call the overridden ToString method ' in the Part class. Console.WriteLine() For Each aPart As Part In parts Console.WriteLine(aPart) Next ' Check the list for part #1734. This calls the IEquatable.Equals method ' of the Part class, which checks the PartId for equality. Console.WriteLine(vbLf & "Contains(""1734""): {0}", parts.Contains(New Part() With { _ .PartId = 1734, _ .PartName = "" _ })) ' Insert a new item at position 2. Console.WriteLine(vbLf & "Insert(2, ""1834"")") parts.Insert(2, New Part() With { _ .PartName = "brake lever", _ .PartId = 1834 _ }) 'Console.WriteLine(); For Each aPart As Part In parts Console.WriteLine(aPart) Next Console.WriteLine(vbLf & "Parts[3]: {0}", parts(3)) Console.WriteLine(vbLf & "Remove(""1534"")") ' This will remove part 1534 even though the PartName is different, ' because the Equals method only checks PartId for equality. parts.Remove(New Part() With { _ .PartId = 1534, _ .PartName = "cogs" _ }) Console.WriteLine() For Each aPart As Part In parts Console.WriteLine(aPart) Next Console.WriteLine(vbLf & "RemoveAt(3)") ' This will remove part at index 3. parts.RemoveAt(3) Console.WriteLine() For Each aPart As Part In parts Console.WriteLine(aPart) Next End Sub ' ' This example code produces the following output: ' ID: 1234 Name: crank arm ' ID: 1334 Name: chain ring ' ID: 1434 Name: regular seat ' ID: 1444 Name: banana seat ' ID: 1534 Name: cassette ' ID: 1634 Name: shift lever ' ' Contains("1734"): False ' ' Insert(2, "1834") ' ID: 1234 Name: crank arm ' ID: 1334 Name: chain ring ' ID: 1834 Name: brake lever ' ID: 1434 Name: regular seat ' ID: 1444 Name: banana seat ' ID: 1534 Name: cassette ' ID: 1634 Name: shift lever ' ' Parts[3]: ID: 1434 Name: regular seat ' ' Remove("1534") ' ' ID: 1234 Name: crank arm ' ID: 1334 Name: chain ring ' ID: 1834 Name: brake lever ' ID: 1434 Name: regular seat ' ID: 1444 Name: banana seat ' ID: 1634 Name: shift lever ' ' ' RemoveAt(3) ' ' ID: 1234 Name: crank arm ' ID: 1334 Name: chain ring ' ID: 1834 Name: brake lever ' ID: 1444 Name: banana seat ' ID: 1634 Name: shift lever ' End Class
// Simple business object. A PartId is used to identify the type of part // but the part name can change. [<CustomEquality; NoComparison>]type Part = { PartId : int ; mutable PartName : string } with override this.GetHashCode() = hash this.PartId override this.Equals(other) = match other with | :? Part as p -> this.PartId = p.PartId | _ -> false override this.ToString() = sprintf "ID: %i Name: %s" this.PartId this.PartName[<EntryPoint>]let main argv = // We refer to System.Collections.Generic.List<'T> by its type // abbreviation ResizeArray<'T> to avoid conflicts with the F# List module. // Note: In F# code, F# linked lists are usually preferred over // ResizeArray<'T> when an extendable collection is required. let parts = ResizeArray<_>() parts.Add({PartName = "crank arm" ; PartId = 1234}) parts.Add({PartName = "chain ring"; PartId = 1334 }) parts.Add({PartName = "regular seat"; PartId = 1434 }) parts.Add({PartName = "banana seat"; PartId = 1444 }) parts.Add({PartName = "cassette"; PartId = 1534 }) parts.Add({PartName = "shift lever"; PartId = 1634 }) // Write out the parts in the ResizeArray. This will call the overridden ToString method // in the Part type printfn "" parts |> Seq.iter (fun p -> printfn "%O" p) // Check the ResizeArray for part #1734. This calls the IEquatable.Equals method // of the Part type, which checks the PartId for equality. printfn "\nContains(\"1734\"): %b" (parts.Contains({PartId=1734; PartName=""})) // Insert a new item at position 2. printfn "\nInsert(2, \"1834\")" parts.Insert(2, { PartName = "brake lever"; PartId = 1834 }) // Write out all parts parts |> Seq.iter (fun p -> printfn "%O" p) printfn "\nParts[3]: %O" parts.[3] printfn "\nRemove(\"1534\")" // This will remove part 1534 even though the PartName is different, // because the Equals method only checks PartId for equality. // Since Remove returns true or false, we need to ignore the result parts.Remove({PartId=1534; PartName="cogs"}) |> ignore // Write out all parts printfn "" parts |> Seq.iter (fun p -> printfn "%O" p) printfn "\nRemoveAt(3)" // This will remove the part at index 3. parts.RemoveAt(3) // Write out all parts printfn "" parts |> Seq.iter (fun p -> printfn "%O" p) 0 // return an integer exit code

The following example demonstrates the Insert method, along with various other properties and methods of the List<T> generic class. After the list is created, elements are added. The Insert method is used to insert an item into the middle of the list. The item inserted is a duplicate, which is later removed using the Remove method.

using namespace System;using namespace System::Collections::Generic;void main(){ List<String^>^ dinosaurs = gcnew List<String^>(); Console::WriteLine("\nCapacity: {0}", dinosaurs->Capacity); dinosaurs->Add("Tyrannosaurus"); dinosaurs->Add("Amargasaurus"); dinosaurs->Add("Mamenchisaurus"); dinosaurs->Add("Deinonychus"); dinosaurs->Add("Compsognathus"); Console::WriteLine(); for each(String^ dinosaur in dinosaurs ) { Console::WriteLine(dinosaur); } Console::WriteLine("\nCapacity: {0}", dinosaurs->Capacity); Console::WriteLine("Count: {0}", dinosaurs->Count); Console::WriteLine("\nContains(\"Deinonychus\"): {0}", dinosaurs->Contains("Deinonychus")); Console::WriteLine("\nInsert(2, \"Compsognathus\")"); dinosaurs->Insert(2, "Compsognathus"); Console::WriteLine(); for each(String^ dinosaur in dinosaurs ) { Console::WriteLine(dinosaur); } Console::WriteLine("\ndinosaurs[3]: {0}", dinosaurs[3]); Console::WriteLine("\nRemove(\"Compsognathus\")"); dinosaurs->Remove("Compsognathus"); Console::WriteLine(); for each(String^ dinosaur in dinosaurs ) { Console::WriteLine(dinosaur); } dinosaurs->TrimExcess(); Console::WriteLine("\nTrimExcess()"); Console::WriteLine("Capacity: {0}", dinosaurs->Capacity); Console::WriteLine("Count: {0}", dinosaurs->Count); dinosaurs->Clear(); Console::WriteLine("\nClear()"); Console::WriteLine("Capacity: {0}", dinosaurs->Capacity); Console::WriteLine("Count: {0}", dinosaurs->Count);}/* This code example produces the following output:Capacity: 0TyrannosaurusAmargasaurusMamenchisaurusDeinonychusCompsognathusCapacity: 8Count: 5Contains("Deinonychus"): TrueInsert(2, "Compsognathus")TyrannosaurusAmargasaurusCompsognathusMamenchisaurusDeinonychusCompsognathusdinosaurs[3]: MamenchisaurusRemove("Compsognathus")TyrannosaurusAmargasaurusMamenchisaurusDeinonychusCompsognathusTrimExcess()Capacity: 5Count: 5Clear()Capacity: 5Count: 0 */
List<string> dinosaurs = new List<string>();Console.WriteLine("\nCapacity: {0}", dinosaurs.Capacity);dinosaurs.Add("Tyrannosaurus");dinosaurs.Add("Amargasaurus");dinosaurs.Add("Mamenchisaurus");dinosaurs.Add("Deinonychus");dinosaurs.Add("Compsognathus");Console.WriteLine();foreach(string dinosaur in dinosaurs){ Console.WriteLine(dinosaur);}Console.WriteLine("\nCapacity: {0}", dinosaurs.Capacity);Console.WriteLine("Count: {0}", dinosaurs.Count);Console.WriteLine("\nContains(\"Deinonychus\"): {0}", dinosaurs.Contains("Deinonychus"));Console.WriteLine("\nInsert(2, \"Compsognathus\")");dinosaurs.Insert(2, "Compsognathus");Console.WriteLine();foreach(string dinosaur in dinosaurs){ Console.WriteLine(dinosaur);}// Shows accessing the list using the Item property.Console.WriteLine("\ndinosaurs[3]: {0}", dinosaurs[3]);Console.WriteLine("\nRemove(\"Compsognathus\")");dinosaurs.Remove("Compsognathus");Console.WriteLine();foreach(string dinosaur in dinosaurs){ Console.WriteLine(dinosaur);}dinosaurs.TrimExcess();Console.WriteLine("\nTrimExcess()");Console.WriteLine("Capacity: {0}", dinosaurs.Capacity);Console.WriteLine("Count: {0}", dinosaurs.Count);dinosaurs.Clear();Console.WriteLine("\nClear()");Console.WriteLine("Capacity: {0}", dinosaurs.Capacity);Console.WriteLine("Count: {0}", dinosaurs.Count);/* This code example produces the following output:Capacity: 0TyrannosaurusAmargasaurusMamenchisaurusDeinonychusCompsognathusCapacity: 8Count: 5Contains("Deinonychus"): TrueInsert(2, "Compsognathus")TyrannosaurusAmargasaurusCompsognathusMamenchisaurusDeinonychusCompsognathusdinosaurs[3]: MamenchisaurusRemove("Compsognathus")TyrannosaurusAmargasaurusMamenchisaurusDeinonychusCompsognathusTrimExcess()Capacity: 5Count: 5Clear()Capacity: 5Count: 0 */
Imports System.Collections.GenericPublic Class Example Public Shared Sub Main() Dim dinosaurs As New List(Of String) Console.WriteLine(vbLf & "Capacity: {0}", dinosaurs.Capacity) dinosaurs.Add("Tyrannosaurus") dinosaurs.Add("Amargasaurus") dinosaurs.Add("Mamenchisaurus") dinosaurs.Add("Deinonychus") dinosaurs.Add("Compsognathus") Console.WriteLine() For Each dinosaur As String In dinosaurs Console.WriteLine(dinosaur) Next Console.WriteLine(vbLf & "Capacity: {0}", dinosaurs.Capacity) Console.WriteLine("Count: {0}", dinosaurs.Count) Console.WriteLine(vbLf & "Contains(""Deinonychus""): {0}", _ dinosaurs.Contains("Deinonychus")) Console.WriteLine(vbLf & "Insert(2, ""Compsognathus"")") dinosaurs.Insert(2, "Compsognathus") Console.WriteLine() For Each dinosaur As String In dinosaurs Console.WriteLine(dinosaur) Next ' Shows how to access the list using the Item property. Console.WriteLine(vbLf & "dinosaurs(3): {0}", dinosaurs(3)) Console.WriteLine(vbLf & "Remove(""Compsognathus"")") dinosaurs.Remove("Compsognathus") Console.WriteLine() For Each dinosaur As String In dinosaurs Console.WriteLine(dinosaur) Next dinosaurs.TrimExcess() Console.WriteLine(vbLf & "TrimExcess()") Console.WriteLine("Capacity: {0}", dinosaurs.Capacity) Console.WriteLine("Count: {0}", dinosaurs.Count) dinosaurs.Clear() Console.WriteLine(vbLf & "Clear()") Console.WriteLine("Capacity: {0}", dinosaurs.Capacity) Console.WriteLine("Count: {0}", dinosaurs.Count) End SubEnd Class' This code example produces the following output:''Capacity: 0''Tyrannosaurus'Amargasaurus'Mamenchisaurus'Deinonychus'Compsognathus''Capacity: 8'Count: 5''Contains("Deinonychus"): True''Insert(2, "Compsognathus")''Tyrannosaurus'Amargasaurus'Compsognathus'Mamenchisaurus'Deinonychus'Compsognathus''dinosaurs(3): Mamenchisaurus''Remove("Compsognathus")''Tyrannosaurus'Amargasaurus'Mamenchisaurus'Deinonychus'Compsognathus''TrimExcess()'Capacity: 5'Count: 5''Clear()'Capacity: 5'Count: 0
[<EntryPoint>]let main argv = // We refer to System.Collections.Generic.List<'T> by its type // abbreviation ResizeArray<'T> to avoid conflict with the List module. // Note: In F# code, F# linked lists are usually preferred over // ResizeArray<'T> when an extendable collection is required. let dinosaurs = ResizeArray<_>() // Write out the dinosaurs in the ResizeArray. let printDinosaurs() = printfn "" dinosaurs |> Seq.iter (fun p -> printfn "%O" p) printfn "\nCapacity: %i" dinosaurs.Capacity dinosaurs.Add("Tyrannosaurus") dinosaurs.Add("Amargasaurus") dinosaurs.Add("Mamenchisaurus") dinosaurs.Add("Deinonychus") dinosaurs.Add("Compsognathus") printDinosaurs() printfn "\nCapacity: %i" dinosaurs.Capacity printfn "Count: %i" dinosaurs.Count printfn "\nContains(\"Deinonychus\"): %b" (dinosaurs.Contains("Deinonychus")) printfn "\nInsert(2, \"Compsognathus\")" dinosaurs.Insert(2, "Compsognathus") printDinosaurs() // Shows accessing the list using the Item property. printfn "\ndinosaurs[3]: %s" dinosaurs.[3] printfn "\nRemove(\"Compsognathus\")" dinosaurs.Remove("Compsognathus") |> ignore printDinosaurs() dinosaurs.TrimExcess() printfn "\nTrimExcess()" printfn "Capacity: %i" dinosaurs.Capacity printfn "Count: %i" dinosaurs.Count dinosaurs.Clear() printfn "\nClear()" printfn "Capacity: %i" dinosaurs.Capacity printfn "Count: %i" dinosaurs.Count 0 // return an integer exit code (* This code example produces the following output: Capacity: 0 TyrannosaurusAmargasaurusMamenchisaurusDeinonychusCompsognathus Capacity: 8Count: 5 Contains("Deinonychus"): true Insert(2, "Compsognathus") TyrannosaurusAmargasaurusCompsognathusMamenchisaurusDeinonychusCompsognathus dinosaurs[3]: Mamenchisaurus Remove("Compsognathus") TyrannosaurusAmargasaurusMamenchisaurusDeinonychusCompsognathus TrimExcess()Capacity: 5Count: 5 Clear()Capacity: 5Count: 0 *)

Remarks

List<T> accepts null as a valid value for reference types and allows duplicate elements.

If Count already equals Capacity, the capacity of the List<T> is increased by automatically reallocating the internal array, and the existing elements are copied to the new array before the new element is added.

If index is equal to Count, item is added to the end of List<T>.

(Video) C# Tutorial for Beginners : Lists

This method is an O(n) operation, where n is Count.

Applies to

See also

  • InsertRange(Int32, IEnumerable<T>)
  • Add(T)
  • Remove(T)

FAQs

How to add a list to a list in C#? ›

How to append a second list to an existing list in C#? Use the AddRange() method to append a second list to an existing list. list1. AddRange(list2);

What is list in C# with example? ›

List<T> is a class that contains multiple objects of the same data type that can be accessed using an index. For example, // list containing integer values List<int> number = new List<int>() { 1, 2, 3 }; Here, number is a List containing integer values (1, 2 and 3).

What is the difference between the add method and the insert method of a list object? ›

The insert() method inserts a new item in a specified index, the append() method adds a new at the last index of a list, while the extend() method appends a new data collection to a list.

How to clean a list in C#? ›

To empty a C# list, use the Clear() method.

What is generic in C#? ›

Generic means the general form, not specific. In C#, generic means not specific to a particular data type. C# allows you to define generic classes, interfaces, abstract classes, fields, methods, static methods, properties, events, delegates, and operators using the type parameter and without the specific data type.

What does list () mean? ›

Definition and Usage

The list() function creates a list object. A list object is a collection which is ordered and changeable. Read more about list in the chapter: Python Lists.

What are examples of lists? ›

A list is an ordered data structure with elements separated by a comma and enclosed within square brackets. For example, list1 and list2 shown below contains a single type of data. Here, list1 has integers while list2 has strings. Lists can also store mixed data types as shown in the list3 here.

What is use of INSERT () method in list? ›

The insert() method inserts the specified value at the specified position.

What is difference between INSERT () and database INSERT ()? ›

Using the insert method we can insert the records but if any error occurs in any record system will throw an error insertion fail and none of the records are inserted. If we want to execute partially the success of bulk insert operation we will use database . insert.

How does INSERT () work? ›

insert() function is a Python library function used to insert a given element at a given index in a list. After the insertion of a new element in the list, elements after the inserted element are shifted by one index to the right side.

What is clear () in C#? ›

This method(comes under System. Collections namespace) is used to remove all the objects from the Stack. This method will set the Count of Stack to zero, and references to other objects from elements of the collection are also removed. This method is an O(n) operation, where n is Count.

How to remove one item from list in C#? ›

To remove an item from a list in C# using index, use the RemoveAt() method.

What is an example of generic? ›

You use generic to describe something that refers or relates to a whole class of similar things. Parmesan is a generic term used to describe a family of hard Italian cheeses. A generic drug or other product is one that does not have a trademark and that is known by a general name, rather than the manufacturer's name.

How to declare list type variable in C#? ›

The type of variable that the list can store is defined using the generic syntax. Here is an example of defining a list called numbers which holds integers. List<int> numbers = new List<int>(); The difference between a list and an array is that lists are dynamic sized, while arrays have a fixed size.

How to get value from list in C#? ›

How to retrieve values from a list in c# using for loop... List<string[]> list = new List<string[]>(); list. Add(new string[] { "Id", "Name", "Age" });

What are generic and non generic collections in C#? ›

A Generic collection is a class that provides type safety without having to derive from a base collection type and implement type-specific members. A Non-generic collection is a specialized class for data storage and retrieval that provides support for stacks, queues, lists and hash tables.

Why use generics C#? ›

Generics allow you to define the specification of the data type of programming elements in a class or a method, until it is actually used in the program. In other words, generics allow you to write a class or method that can work with any data type.

Why are generics used? ›

In a nutshell, generics enable types (classes and interfaces) to be parameters when defining classes, interfaces and methods. Much like the more familiar formal parameters used in method declarations, type parameters provide a way for you to re-use the same code with different inputs.

What is generic function example? ›

Generics is the idea to allow type (Integer, String, … etc and user-defined types) to be a parameter to methods, classes and interfaces. For example, classes like an array, map, etc, which can be used using generics very efficiently.

What is a list used for? ›

2. A list is any information displayed or organized in a logical or linear formation. Below is an example of a numerical list, often used to show several steps that need to be performed to accomplish something.

What are lists used for? ›

A list is a number of items in an ordered or unordered structure. A list can be used for a number of things like storing items or deleting and adding items.

How does a list work? ›

A Work List provides a list of actions or commands to be submitted to a Connect:Direct server. The Work List can submit processes, commands to Send or Receive a file, execute a Run Task, execute a Run Job, or execute a local system command or program.

What is insert () in Java? ›

The insert() method of the Java StringBuffer class is used to insert the given string at the specified index. There are various overloaded insert() methods available in StringBuffer class.

How does insert method work in Java? ›

StringBuffer insert() in Java

insert() method inserts the string representation of given data type at given position in a StringBuffer. Syntax: str. insert(int position, char x); str.

What language is insert? ›

The “INSERT INTO” command is a part of the Data Manipulation Language (DML), a sublanguage of SQL that enables modification and retrieval of information from database objects. This command enables sus to insert rows into tables. Using this command, you can insert values into all columns or selected columns of a table.

What is called insert? ›

in·​sert ˈin-ˌsərt. : something that is inserted. especially : written or printed material inserted (as between the leaves of a book)

How many records can be inserted using database insert? ›

You can not insert more than 10000 rows of records in a single call.

How do I know if insert is working? ›

You can check the @@ROWCOUNT right after insert. If it's more than 0, then the insert succeeded. Also, if @@ERROR = 0 after insert, it was successful. No, check it in T-SQL although if the insert will result in error, most likely the error will be propagated into the client.

Why we use console ReadKey () in C#? ›

ReadKey() Obtains the next character or function key pressed by the user. The pressed key is displayed in the console window.

How to reset an array in C#? ›

To empty an array in C#, use the Array Clear() method: The Array. Clear method in C# clears i.e.zeros out all elements.

How to refresh console in C#? ›

Use the Console. Clear() method to clear screen and the console buffer.

How do I remove a specific item from a linked list? ›

Type 1: remove() Method

It is used to remove an element from a linked list. The element is removed from the beginning or head of the linked list. Parameters: This function does not take any parameter. Return Value: This method returns the head of the list or the element present at the head of the list.

How do I turn a list into a string? ›

To convert a list to a string, use Python List Comprehension and the join() function. The list comprehension will traverse the elements one by one, and the join() method will concatenate the list's elements into a new string and return it as output.

How do I remove multiple properties from an object? ›

You can use the delete operator, which is simpler, or object destructuring, which can remove more than a single property at a time.

How do I add and remove items from ListBox? ›

When a user enters some text into a TextBox and clicks on the add Button, text will be shown in the ListBox. After that, select text from the ListBox and click on the Delete Button to remove the text from the ListBox control. Let's take a look at a practical example.

How to combine two lists in C#? ›

To join two lists, use AddRange() method.

How do I append a list to a list? ›

append() adds a list inside of a list. Lists are objects, and when you use . append() to add another list into a list, the new items will be added as a single object (item).

Is list and array same in C#? ›

An array stores a fixed-size sequential collection of elements of the same type, whereas list is a generic collection.

Can I add an array to a list C#? ›

Adding Elements in ArrayList

Use the Add() method or object initializer syntax to add elements in an ArrayList . An ArrayList can contain multiple null and duplicate values. Use the AddRange(ICollection c) method to add an entire Array, HashTable, SortedList, ArrayList , BitArray , Queue, and Stack in the ArrayList .

Which method is used to merge two lists? ›

The addAll() method to merge two lists.

How do I add all strings to a list? ›

You can concatenate a list of strings into a single string with the string method, join() . Call the join() method from 'String to insert' and pass [List of strings] . If you use an empty string '' , [List of strings] is simply concatenated, and if you use a comma , , it makes a comma-delimited string.

What do you mean by append () in list? ›

The append() method appends an element to the end of the list.

How do I connect a list to a string? ›

To convert a list to a string, use Python List Comprehension and the join() function. The list comprehension will traverse the elements one by one, and the join() method will concatenate the list's elements into a new string and return it as output.

How to add items dynamically in list in C#? ›

You need to move the declaration of the lists outside of the loop. At the moment on each loop a new list is created and the old one is lost. Change your code to look like the below, see that the lists are outside the loop so they get re-used each time rather than replaced. No problem, glad to help.

How many items are in a list C#? ›

MaxValue or 2,147,483,647 is the most items you could stick in a list. Really got to question why on earth you would need that many, there is likely to be a more sensible approach to managing the data.

Videos

1. 30. Generic List_part - 1/3.wmv
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