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Great Reads

Proper List Support in C#

by honey the codewitch

Implementing full list support over custom data structures in .NET

Maths in IT #2: Venn diagrams

by Sander Rossel

Using Venn diagrams to visualize sets.

LookAheadEnumerator: Implement Backtracking in Your Parsers

by honey the codewitch

Easily implement efficient backtracking capabilities over any enumeration

How to Create a WCF WebService in VB.NET

by Rene Bustos

WCF WebService IN VB.NET Response JSON

Latest Articles

B-Tree Sorted Dictionary

by Gerardo Recinto

In-memory B-Tree sorted dictionary

Batch Processing with Directory.EnumerateFiles

by Bohdan Stupak

Batching is a nice technique that allows you to handle big amounts of data gracefully. Directory.EnumerateFiles is the API that allows you to organize batch processing for the directory with a large number of files.

Iterator Benchmarks that Shocked with Unexpected Results

by Dev Leader

This article is follow up content to previous articles I've written about iterators and collections, but the benchmark results were NOT what I expected!

A Generic Form of the NameValueCollection

by Pavel Bashkardin

Represents a C# generic implementation of the NameValueCollection

All Articles

Collections

Proper List Support in C#

17 Nov 2019 by honey the codewitch

Implementing full list support over custom data structures in .NET

Maths in IT #2: Venn diagrams

9 Nov 2015 by Sander Rossel

Using Venn diagrams to visualize sets.

LookAheadEnumerator: Implement Backtracking in Your Parsers

23 Dec 2019 by honey the codewitch

Easily implement efficient backtracking capabilities over any enumeration

How to Create a WCF WebService in VB.NET

16 May 2017 by Rene Bustos

WCF WebService IN VB.NET Response JSON

Metaprogramming in C++: A Gentle Introduction

23 Mar 2021 by honey the codewitch

Make your code more efficient by hacking your compiler to improve its optimization capabilities

Batch Processing with Directory.EnumerateFiles

12 Aug 2023 by Bohdan Stupak

Batching is a nice technique that allows you to handle big amounts of data gracefully. Directory.EnumerateFiles is the API that allows you to organize batch processing for the directory with a large number of files.

A Generic Circular Buffer in C#

6 Feb 2020 by honey the codewitch

A circular buffer implementing IList

Efficiently Using Lists as Dictionary Keys in C#

24 Feb 2020 by honey the codewitch

A relatively safe, simple, yet high performance technique for using lists as dictionary keys.

Convert Datatable to Collection using Generic

16 Aug 2011 by Damian Flynn

Here's a couple of gems...From IList to DataTable.From DataTable to array of T.// DataTable: from IListpublic static DataTable ToDataTable(this IList iList){ DataTable dataTable = new DataTable(); PropertyDescriptorCollection propertyDescriptorCollection = ...

IndexedQueue<T> - A Custom Queue in C#

5 Dec 2019 by honey the codewitch

Fills a gap in Microsoft's Queue offering with an alternative allowing efficient indexed access

indexing a collection

14 Jul 2011 by Sergey Alexandrovich Kryukov

The point of hashing and Dictionary is using the unique keys bur also fast search by the key, which you can call indexing. The speed of search is of O(1), see http://en.wikipedia.org/wiki/Big_O_notation[^]. If you think about it, you will understand that a non-unique key cannot be used with...

new List with or without parentheses

1 Aug 2011 by Abhinav S

Nothing, as far as your example is concerned.In the first case, you could actually define the array count in the first statement but add values to it later.E.g.List withParentheses = new List[4];withParentheses[0]=1;withParentheses[1]=2;In the second case, you don't have that...

Comparing two collections

19 Jul 2023 by PIEBALDconsult

If you have access to the code for the Address class, you can add the ability for them to compare themselves. The following is a very naïve example. Comparing addresses is a very complex topic with many pitfalls. public partial class Address...

How can I detect if my observation collection changed in VB.NET ?

17 Mar 2024 by Pete O'Hanlon

You cannot tell if an object has been changed using an ObservableCollection. The way to do this is to use INotifyPropertyChanged and raise the PropertyChanged event whenever you change the value in a property.

Tree structure .NET4

30 May 2011 by Sergey Alexandrovich Kryukov

You don't need a data special structure for the tree. Having such data type in a standard library would be absolutely redundant, because a tree is just a list of some elements which has a "children" member of the same type.Here is the simplest example:using Tree =...

Convert Datatable to Collection using Generic

13 Aug 2011 by Vano Maisuradze

Very nice!I've modified ToCollection(this DataTable dt) extension function, so if DataTable column names and class property names are different, then you can use this alternative:public static List ToCollection(this DataTable table, Dictionary dic){ List lst = new...

Collection Types in VB.NET

5 Jan 2012 by Mehdi Gholam

ArrayList is a collection for any type of object, which should not be used because of boxing and unboxing performance, you should use List instead. You usually use this for storing and iterating over as is.Hashtable is a collection for rapid storing and retrieval based on the...

Performance question on IOrderedEnumerable

20 Feb 2012 by Fredrik Bornander

Deferred execution is the culprit here (I think), the sort isn't run until the result is enumerated so when you do this;orderedList.Contains(923456); you're resorting the list again for every iteration. ToList forces the result to be enumerated up front.You can see this by changing...

Filter list<string> using linq

13 Oct 2017 by Karthik_Mahalingam

try string[] userDataKeys = config.Where(x => x.Contains("userdata.")).Select(x => x.Replace("userdata.", "") ).ToArray();

How do I use a listbox on my main form with input data on another form?

6 Apr 2010 by William Winner

OK..there are a lot of problems with your code. Let's look at some of your code:public static frmMain Main = null;//...more codeprivate void btnAdd_Click(object sender, EventArgs e){ frmAdd add = new frmAdd(); add.Show(); Main = this; this.Hide(); ...

Collection Types in VB.NET

5 Jan 2012 by Wendelius

Fully agree on Mehdi's solution. Also few links you may find useful:- A Comparison of .NET Collections[^]- Cheat Sheet: Speed of Common Operations[^]

Performance question on IOrderedEnumerable

20 Feb 2012 by Sander Rossel

I just stumbled upon an oddity in IOrderedEnumerable.Contains[^] and was wondering if more people here had the problem or if it is just me...Consider the following code:using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace...

Few Words about ConcurrentHashMap

21 Dec 2017 by rtybase

An use case for ConcurrentHashMap

ICollectionView.Source returns null when trying to update the View's Filter.

4 Sep 2012 by BeStelios

public class ViewModel { ObservableCollection CustomerList = new ObservableCollection(); public ICollectionView BlueCustomersView { get; private set; } public ICollectionView BlackCustomersView { get; private set; } public ICollectionView...

A Complete Sample of Custom Class Collection Serialization and Deserialization

19 Jun 2014 by Maciej Los

If you want to know the way you can serialize and deserialize custom class collection, this tip is for you.

deserialization

What's the best way to implement a sorted collection/dictionary with multiple values allowed?

18 Feb 2015 by PIEBALDconsult

Here's an example of a class that uses two Dictionaries.I do caution you about your first criterion as I'm sure my solution will have trouble if a value's priority is changed. DumbStuff.PriorityDictionary d = new...

Problem in splitting values

14 Sep 2015 by Matt T Heffron

According to Expresso[^], this regex will give what you want:((?>"[^"]+")|[^;]+)It will splitFrance;Japan;Russia;China;"India;New-Delhi";"NewZeland;Wellington";EnglandintoFranceJapanRussiaChina"India;New-Delhi""NewZeland;Wellington"EnglandThen you can use .Trim('"') on the...

Java FX Foreground/Background Messaging

17 Jul 2019 by ireland94

This program demonstrates the methodology needed for by directional messaging between a Java FX foreground and 1 or more background threads.

multi-threading

Filter list<string> using linq

13 Oct 2017 by Pete O'Hanlon

You're almost there. First you need to identify which records contain userdata.. A where clause helps here:config.Where(x => x.StartsWith("userdata.")).Select(x => x.Replace("userdata.", string.Empty)).ToList();

Persist collection at designtime

21 Feb 2019 by Ralf Meier

I modified your (for me relevant) Code a little bit to make it work. I think that will help you : Imports System.Windows.Forms.Design Imports System.ComponentModel Public Class CustomerComponent Inherits Component ...

Iterator Benchmarks that Shocked with Unexpected Results

17 Mar 2023 by Dev Leader

This article is follow up content to previous articles I've written about iterators and collections, but the benchmark results were NOT what I expected!

Diffrence B/W ArrayList and HashTable, Which one is synchronized and give me one Real Time example of this?

14 Apr 2010 by William Winner

Do you really expect us to do your homework for you...ok..here you go:C# ArrayList[^] and C# HashTable[^]

Removing an item from a Dictionary within a Dictionary

8 Jun 2010 by Chris Trelawny-Ross

There is no need to remove and re-add the inner dictionary when removing an item from it, so you can just do:// To remove outer[1][2]outer[1].Remove(2);

Collections choosen only for its dynamic behaviour over Arrays

25 Apr 2011 by OriginalGriff

Array is a fixed type: it's size must be known in advance of adding the elements. With the other collection types, you do not need to know the size in advance. You cannot extend the size of an array: you have to declare a bigger array and copy all the existing elements into it.Additionally,...

Tree structure .NET4

30 May 2011 by Monjurul Habib

http://www.google.com/#hl=en&sugexp=ldymls&xhr=t&q=generic+tree+c+sharp&cp=14&pq=generic%20c%23%20&pf=p&sclient=psy&source=hp&aq=0v&aqi=&aql=&oq=generic++tree+C%23+&pbx=1&bav=on.2,or.r_gc.r_pw.&fp=f99e8c741a251b45&biw=1024&bih=558[^]

Tree structure .NET4

30 May 2011 by Espen Harlinn

Just a followup on SAKryukovs' answer, how about:public class TreeNode{ public class ChildList : BindingList > {} private ChildList children; private T data; public TreeNode() { children = new ChildList(); } public TreeNode(T...

Collections within a collection?

13 Jun 2011 by parmar_punit

class Person{ public string Name { get; set; } public Fruits FruitsItem { get; set; } //now you can get the details like this.... List _allPerson = new List(); private List CreateCollection() { _allPerson.Add(new Person { Name =...

Asp.net gridview serverside code with collection class to bind problem

29 Sep 2011 by Al Moje

Hi,In your DAL I thing you should do it this way to return theList of User Public Shared Function SelectAll() As List(Of User) 'Create List Of User Dim userColl As New List(Of User) Try 'select * from User _sqlConn = New...

polymorphism and Generics

26 Dec 2011 by Sergey Alexandrovich Kryukov

Polymorphism is not a phenomena which can be allowed or prohibited. Generics cannot change the situation, because they have nothing to do with polymorphism, because they have nothing to do with inheritance, "virtual" and late binding. Generics are static; any type which can be instantiated...

BitArray indexed List

4 Apr 2012 by pinx

List subclass for limited number of items and fast search.

Class associations in C#

20 Aug 2012 by Clifford Nelson

You have two ways to associate Employees and Departments using objects. One is to have a Department property in the Employee object and the other is to have a collection of Employee objects in the Department object. You will also, at the minimum have either a collection of all Department or all...

Dispatcher.Invoke((ThreadStart...

26 Sep 2012 by cpquest

Hi all,i have implemented a Extension method for ICollection f in project that bacically i am trying to do some datagrid related operation on ApplicationIdle state. here is the code. public static class CollectionExtension { /// /// Set item Binding to...

Dispatcher.Invoke((ThreadStart...

26 Sep 2012 by Clifford Nelson

I have used the Dispatcher, and it does not seem to be very reliable. Had much more luck with tasks: First get a TaskScheduler from somewhere that is on the UI thread:TaskScheduler uiScheduler = TaskScheduler.FromCurrentSynchronizationContext();Then in the place you need to make changes...

Distinct with nested collections.

31 Oct 2012 by Ilya Holinov

var titles = A.Bs .Select(b => b.Title) .Union(A.Bs.SelectMany(b => b.Cs, (b, c) => c.Title)) .Distinct();

Convert Dataset into List Collection in ASP.Net

4 Feb 2013 by Santhosh Kumar Jayaraman

If you're using .NET 3.5, you can use DataTableExtensions.AsEnumerable (an extension method) and then if you really need a List instead of just IEnumerable you can call Enumerable.ToList:IEnumerable sequence = dt.AsEnumerable();orList list =...

VB.NET Collection to Datagridview

7 Aug 2013 by ridoy

I think this should help you..Binding a generic collection to a DataGridView via Visual Basic 2008 code[^]And to filter collection you can follow..FilterDatainaCollectionSettheFilterpropertytoaFilterEventHandler.htm[^]

Using the generic type 'System.Collections.Generic.List<T>' requires '1' type arguments" error?

9 Oct 2014 by Richard Deeming

You might be able to get away with specifying the correct generic type name:System.Collections.Generic.List`1[BusinessObject.Products]However, the simplest solution would be to use a custom non-generic collection class:using System;using System.Collections.Generic;namespace...

How to increase capacity of collectionbase automatticly?

23 Nov 2014 by Kornfeld Eliyahu Peter

MSDN:... the capacity is automatically increased by reallocating the internal array before copying the old elements and adding the new elements.http://msdn.microsoft.com/en-us/library/system.collections.collectionbase.capacity(v=vs.110).aspx[^]

How set values in observable collection ?

17 Jan 2015 by BillWoodruff

using System.Collections.ObjectModel;namespace TestObservableCollection{ public class WorkSpace { public int ID { set; get; } public string Name { set; get; } public WorkSpace(int id, string name) { ID = id; Name =...

What's the best way to implement a sorted collection/dictionary with multiple values allowed?

18 Feb 2015 by Herbisaurus

I need a collection of objects that will: * allow get, set functionality object via a key (like in a dictionary)* I need to iterate through the collection in a sorted manner, ordered by a "Priority" value* the priority allows multiple values. * the keys can be an int or a string, it...

Collection Of List in c# - add files to list

19 Feb 2015 by SaranshSrivastava

Use AddRange() method of List instead Add. Like below:string[] input = { "Apple", "Orange", "Apricots" }; List fruits= new List(); Console.WriteLine("\nAddRange(fruits)"); ...

[VB.net] Custom Collection Error

24 Jul 2015 by Ralf Meier

You must add the following line to your Property : Public ReadOnly Property Items As ExplorerBarItemCollection Get Return fItems End...

Problem in splitting values

14 Sep 2015 by Riya-Pandey

I am having trouble in splitting string. I mean i am able to split the string but i also need to put a certain condition as to how to split.My strings text is France;Japan;Russia;China;"India;New-Delhi";"NewZeland;Wellington";EnglandI want to split string using ; as delimiter....

Problem in splitting values

14 Sep 2015 by Patrice T

Solution 1: Never use as separator a char that appear in data.I guess you see why it is a problem.If you can change your csv file, use a separator that is unused in that data at csv generation.Solution 2: it gets pretty complicated. string csvline...

Guid should contain 32 digits with 4 dashes (xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx). error?

7 Jan 2016 by debashishPaul

You are trying to convert the ArrayList to Guid.TaxFieldID = new Guid(Alist .ToString ())Use an iterator (for / while / foreach) to iterate through the ArrayList items and convert each item.

Guid should contain 32 digits with 4 dashes (xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx). error?

7 Jan 2016 by Maciej Los

On the first look, below line may throw an error:TaxFieldID = new Guid(Alist .ToString ()),Guid constructor does not accept array of strings, it accepts single string.Guid g = new Guid(Alist[0]);See: Guid Constructor (System)[^]

How to add values to the existing keys in the dictionary in C#

25 Apr 2016 by Karthik_Mahalingam

Add this in your second loopforeach (KeyValuePair pair in listcps) { foreach (var counterparty in cpResponse.counterpartyList) { if (noNexusCpsdict.ContainsKey(counterparty.CounterpartyId)) ...

Error while checking whether a given string is palindrome or not

30 Jun 2016 by Mohibur Rashid

In your boolean check function you are assigning arr to temp. arr and temp are same objects. If you reverse temp, you are reversing arr. You better look at how to clone to an object, not the assignment operator

Same email address in both to and CC fields

16 Mar 2017 by Jochen Arndt

Your tester does not know what he talks about. If you specify the same address multiple times, it will be send multiple times. It does not care in which of the destination fields ("To", "Cc", "Bcc") the address is specified. The SMTP server will parse all fields and forward the message to each...

Filter list<string> using linq

13 Oct 2017 by Maciej Los

There's no need to use .StartWith or .Contains method. Simple .Replace should be enough :) var result = config.Select(x=>x.Replace("userdata.", string.Empty)).ToList(); Of course, if you want to return only data with member word, you can use: var result =...

A list containing 2 more lists works slow in looping can I use thread to make this faster?

24 Feb 2018 by phil.o

(workItem.WorkItemLinks[0].Lin...

multi-threading

A list containing 2 more lists works slow in looping can I use thread to make this faster?

24 Feb 2018 by BillWoodruff

If you are serious about understanding time performance in .NET, I suggest you learn to use one of these open-source tools: BenchmarkDotNet (what I use) [^], or, AppMetrics [^]. By doing this, you will become a better programmer. Scott Hanselman wrote about BenchMark in 2016: [^]. Both these...

multi-threading

I have used following logic for the following code.plz help me correct this code

10 Jun 2019 by CPallini

Try: import java.util.*; import java.lang.*; import java.io.*; class GFG { public static void main (String[] args) { Scanner sc = new Scanner(System.in); int t=sc.nextInt(); List list = new ArrayList(); while(t-- > 0) { list.add(sc.nextInt()); ...

How can implement a hash table with using only primitive data types in C#

26 Apr 2020 by OriginalGriff

Google is your friend: Be nice and visit him often. He can answer questions a lot more quickly than posting them here... A very quick search using your subject as the search term gave over 2 million hits: implement a hash table using only...

List<bool> doesn't update the values .net5.0

14 Jan 2022 by Electro_Attacks

Ok guys, I've managed to get my code working, somehow... It's not tested completely, but it looks promising to me :) If you find any errors doing testing, or any suggestions how I can improve my code, let me know... You might need to comment...

How do I declaratively initialise a C# nested collection?

31 Jan 2022 by Richard Deeming

A collection initializer can work with multiple parameters - for example: private static Dictionary _dataStructure = new() { ["Foo"] = new MyDataPlot { { 0, 1 }, { 2, 3 }, { 4, 5 }, }, }; ...

Binding not working when custom control is used in a datagridtemplatecolumn

6 Mar 2024 by Graeme_Grant

List is not a bindable collection. You need to use the ObservableCollection Class (System.Collections.ObjectModel) | Microsoft Learn[^]. Here is a working solution for a similar question. Create a new project and add this code: 1. Classes: ...

custom-controls

25 Nov 2009 by Eightbitz

Having trouble iterating through a stack for a "Simon" game. I created a random string generator to populate a stack to iterate through to trigger timers, and I can only get it to iterate the same index over and over. How do I get it to return to timer() and go to the next item in the stack (mySimon

About your article "How To Use a .NET Class with Lists in VB6"!!

29 Dec 2009 by saleem_deek

I read your article,and i thought that i finally found what i'm searching for,but it was not enough:(..I'm trying to use your way to call my C# DLL from VB6,using collections,and it's not working,when i try to assign a new collection from the C# dll function,it gives me one of these two...

About your article "How To Use a .NET Class with Lists in VB6"!!

29 Dec 2009 by dan!sh

I would be better if you post the question under the forum below the article itself. That way the article writer will be notified and will help you out.

Should I expose a collection as a method.

19 Feb 2010 by JimBob SquarePants

Hi all,I've been writing a provider that uses generics to allow for xml serialization of simple classes for storage on low to medium use websites. The system works great but when I used FXcop on my project I received the warning:"Properties should be used instead of Get/Set methods " on...

How do I use a listbox on my main form with input data on another form?

6 Apr 2010 by Not Active

zakaryfaithful...

How do I use a listbox on my main form with input data on another form?

6 Apr 2010 by zakaryfaithfull

I basically need the order to be added to the listbox on the other form as a single item holding all of the order information i.e. name, delivery day etc.

How do I use a listbox on my main form with input data on another form?

6 Apr 2010 by Not Active

Don't post another question about the same thing, respond to the original.Obviously, you need to persist the items somehow so they can be displayed in the listbox. This can be an object persisted in memory or even the listbox itself provided it is not destroyed.

How do I use a listbox on my main form with input data on another form?

6 Apr 2010 by zakaryfaithfull

I don't really understand what that means. I'm new to C# programming so am still learning even some of the basics.I have got the following code for the submit button on the order form:Main.Orders.Items.Add(custName.Text.ToString() + ", " + custAddress.Text.ToString() + ", " +...

How do I use a listbox on my main form with input data on another form?

6 Apr 2010 by William Winner

Add an event to the order form that fires when you click the submit button.Then, create a custom event argument that contains the information entered in the order form and pass it when you raise the event.Then, on the main form, subscribe to the event and when the submit event is raised,...

How do I use a listbox on my main form with input data on another form?

6 Apr 2010 by zakaryfaithfull

Could you provide me with an example code?

How do I use a listbox on my main form with input data on another form?

6 Apr 2010 by zakaryfaithfull

From WW: don't add an answer, update the original post. I've moved this answer into your OP

Diffrence B/W ArrayList and HashTable, Which one is synchronized and give me one Real Time example of this?

14 Apr 2010 by Sunasara Imdadhusen

Arraylist is a collection of objects(may be of different types).Arraylist is very much similar to array but it can take values of different datatypes.If you want to find something in a arraylist you have to go through each value in arraylist, theres no faster way out.Hashtable is also...

Adding existing items to collection editor

27 Sep 2018 by teolazza

I, I've created a component with a collection of controls as property:[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)] public List ControlsToNotTranslateThen I've created an UserControl, added some controls to it: buttons and labels.Now I...

custom-controls

Removing an item from a Dictionary within a Dictionary

8 Jun 2010 by la01

Say I have a dictionary Dictionary>What is the best way to remove an item from the "nested" dictionary?For e.g.:Dictionary> outer = new Dictionary>();This Dictionary is then populated with...

UserControls and collection / list property at design time

5 Aug 2010 by norrisMiou

Hi !I'm currently trying to create my own skin system for my personal controls after discovered Devexpress and others solutions. I haven't tried these solutions, but I think the following system is good:-I create a component (inherits from Component) named "Skin". This component can be...

Adding Data using LINQ

17 Aug 2010 by Mukund Kallapur

Hello All,I am trying to add data to my SQL Server database using LINQ and Colections.In the front end, I am using a List Box Control, in which it shows the data as added, but in the backend, the database is not updated.Below is the source code, There is no error or exception...

Adding Data using LINQ

17 Aug 2010 by TheyCallMeMrJames

Hi there,It looks as though there is no code in what you've posted to actually write to the database. You're not using LINQ to SQL, you're using LINQ to objects.Might I suggest a read[^]?It will be worth going through start-to-finish to get an understanding about what is required to...

Adding Data using LINQ

17 Aug 2010 by TheyCallMeMrJames

string connectionString = ConfigurationManager.ConnectionStrings["Data Source=M-EDE94949520E4''SQLEXPRESS;Initial Catalog=test;Integrated Security=True"].ToString();This is not likely at all a valid entry in your web.config. You need to find the name of your connection string and replace...

How to add sync between collection and DataAdapter property

27 Sep 2010 by skavorodker

Hi everyone!I have the following problem:I have a class that contains SqlDataAdapter and a SortedList which contains four SqlCommands indexed by a string, for example dbCommands["select"]. I've added a property for SortedList:public SortedList...

How to add sync between collection and DataAdapter property

1 Oct 2010 by knockNrod

Are you asking how to do this update within the Visual Studio Designer? http://msdn.microsoft.com/en-us/library/bb166014(VS.80).aspx Or are you asking to write the code that actually makes use of your commands within the data adapter at run-time? I think I'd try using INotifyPropertyChanged....

[Solved]IEditableCollectionView :: How to edit/Update and Delete rows from collection view

6 Mar 2011 by TweakBird

Hi All,'IEditableCollectionView' is A good concept to deals with data adding and removing new items, as well as editing items in a transactional way to bind WPF Data Grid.Can you help me..How to implement it for WPF Data Grid ?My Requirement : I have multiple WPF Data Grid's with...

Tree structure .NET4

30 May 2011 by apaka

Is anybody aware of generic tree for c# that has all of net4 goodies and is stable,fast snd tested. or some for java (maybe I could port it).(probably I'll just get use a google sanswer , but ...) Thanks in advance.

indexing a collection

14 Jul 2011 by eranotz50

my assignment is to create a DBMS iv'e created 3 classes witch build an hierarchy similar to the DataTable and DataRow ClassesEntity (T)-> Table -> Record -> Fieldthe Table is created from an Entity using Reflectionwhy and how i created them is not the issue .what i need now is to index...

[C#] Multithreaded Datagridview control binding to collection

25 Jul 2011 by DaanSieben

Hi,Current...

multi-threading

[C#] Multithreaded Datagridview control binding to collection

25 Jul 2011 by Shameel

The Car class implements the INotifyPropertyChanged interface but the actual data source is the Cars object.If I were you, I would create a custom Cars class (not just a collection) and implement INotifyPropertyChanged interface in the Cars class. And whenever a Car was...

multi-threading

[C#] Multithreaded Datagridview control binding to collection

25 Jul 2011 by BobJanova

To fully support data binding the collection should implement IBindingList (i.e. BindingList) or INotifyCollectionChanged (e.g. ObservableCollection). You can use a BindingSource but you still have to make sure that it is notified of changes if the underlying collection doesn't do that...

multi-threading

new List with or without parentheses

1 Aug 2011 by lukeer

Hi experts,we can create a list of known bytes in two similar ways:List withParentheses = new List() {1,2,3,4,5};List withoutParentheses = new List {6,7,8,9,10};Both seem to work. What is the difference between the two?Is one of them preferrable over the other?

new List with or without parentheses

1 Aug 2011 by Mohammad A Rahman

It might be helpful,CSharp 3 0overview[^]:)

Asp.net gridview serverside code with collection class to bind problem

28 Sep 2011 by janwel

Hello guys, got a problem here. As you see I am binding using collection on app code. if my code is like this one _userDAL = New UserDALDim users As UserCollection = _userDAL.SelectAll()'Dim dr As DataTable = getTable()gvUserList.DataSource = usersgvUserList.DataBind()everything...

polymorphism and Generics

26 Dec 2011 by hamzah1

Hi,is polymorphism is allowed to used with generics ? if yes can give me a real example real code used polymorphism and what is the difference between ArrayList and Array when we talk about Polymorphismthanks

Collection Types in VB.NET

5 Jan 2012 by Nara Har

Hello All,I got some concepts regarding arraylist, hashtable, stack, queue, namevaluecollections.Could anyone tell me the practical applications of each.I tried in google but could find exact match.Thanks for your time.

How can I get NotifyCollectionChangedEventHandler to work on the Values of a SortedList in WPF binding

20 Jan 2012 by Erik Rude

I've got the following two combo boxes. One updates the content when the SortedList changes and the other doesn't.

How can I get NotifyCollectionChangedEventHandler to work on the Values of a SortedList in WPF binding

22 Jan 2012 by Erik Rude

Thanks to SteveAdey for pointing out the fatal flaw.In the end I bound to the SortedList changed the SelectedValuePath and used a DataTemplate binding to the Value to get to my desired goal.My solution looks like this: