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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

Should I expose a collection as a method.

20 Feb 2010 by #realJSOP

If you're relying on FXCop to validate your code, you're in for a big let-down. It's only there to provide guidelines that you can choose to follow or ignore, depending on your own code. If you wanted to avoid the warning, you could always retrieve the list outside your Linq statement, and...

ObservableDictionary!

22 May 2010 by #realJSOP

In WPF/Silverlight, you might want to bind to a dictionary. Here's a couple of websites I found.

IIndexable: A read-only list interface

22 Sep 2014 by _groo_

An interface not present in .NET BCL, IIndexable exposes methods for iterating and indexing a read-only collection.

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...

Queue Items are skipped when multiple threads are running in parlally

1 Jul 2015 by Abhinav S

If you need thread safety, use ConcurrentQueue - ConcurrentQueue[^]. The advantage with this queue is when multiple threads read or write data, locking is taken care of by the queue itself.You could always implement locking in a normal queue.

Load XmlData from xml file to datasource(observableCollection) in wpf

3 Apr 2013 by Abhinav_Sharma

Actually I want to populate dataGrid with Xml data present in xmlfile and want to add/remove/update the data in the Datagrid. I tried using XmlDataprovider which works fine in populating the dataGrid but I can't manipulate(add/remove/update)the data. Hence ObservableCollection was a...

[VB.net] Custom Collection Error

24 Jul 2015 by Adrian Andrei

Sorry, when I search in google etc. i can't find what i neededI can't keep a collection with items, when I exit the designer or debug, my Collection get blank..Here is my code:ExplorerBarItemData.vbPublic Class ExplorerBarItemData#Region "Fields" Private fText As String =...

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

24 Feb 2018 by Akhil Jain

This is my code in which a list contains 2 more lists where the WorkItem collection contains a large number of records such as 7,000 it takes 10 min. Is there any way to make it faster and in case it's deciding the workItem type if it's a bug, task or product backlog item. Please tell me how to...

multi-threading

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...

Problem in splitting values

14 Sep 2015 by Andy Lanng

First, I'd suggest looking at csv parsers (just swap the comma for the semi-colon). Dealing with strings inside csv strings is a problem that has been looked into in detail under the guise of CSV Parsing:this one looks good and lists the Quote character as something it deals with:A Fast...

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

9 Oct 2014 by AnoopGharu

Hello everybody, I am work on the asp.net Profile and currently I am trying to work on the multiple properties to showing in the form page using table's but when I run the application then it shows the this following error:Using the generic type 'System.Collections.Generic.List' requires...

How set values in observable collection ?

17 Jan 2015 by antobaro

How set values in observable collection ?I have this code:private ObservableCollection _OpenWorkspaces;public ObservableCollection OpenWorkspaces { get { return _OpenWorkspaces; } set { _OpenWorkspaces = value; }}How Can I set the values ? (like this...

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.

Code module returning "unhashable type: list" error when sending result through fast API

3 Apr 2023 by Apoorva 2022

I've written a python code to check the unique values of the specified column names from a pandas dataframe. What I have tried: Main Code: Checking the unique values & the frequency of their occurence def uniq_fun(df, col_name): try: ...

Choosing the Right Collection

26 Apr 2016 by Arthur Minduca

How to choose the right data structure for a collection of elements

C# CollectionBase complete definition

12 Feb 2018 by arunlakra15

Is there any way, we could view complete definition for CollectionBase class in System.Collection namespace ? Even in msdn, I couldn't find the method definitions in CollectionBase class. Although, the web pages in msdn contains only the properties and method declarations, the definitions are...

ValidationSummary

11 Oct 2013 by ASP.NET Community

A ValidationSummary control is displayed when the IsValid property of the page is false. It "polls" each of the validation controls on the page and

placeholder

11 Oct 2013 by ASP.NET Community

The PlaceHolder control can be used as a container control within a document to dynamically load other controls. The PlaceHolder control has no

Table

11 Oct 2013 by ASP.NET Community

The Table class allows you to build an HTML table and specify its characteristics. A table can be built at design time with static content, but the

stored-procedure

Getting started with MongoDB

11 Oct 2013 by ASP.NET Community

Getting started with MongoDBMongoDB is a famous representative of NoSQL databases. It is a document-oriented database, which means that data will

Get Information of Programatically Created Asp.Net page Using BuildManager class

11 Oct 2013 by ASP.NET Community

Few days back I came across a problem on asp.net site wherein a user wanted to get information about controls of a Page from a different page.

Tracing for an ASP.net application

11 Oct 2013 by ASP.NET Community

ASP.net offers a built-in functionality for tracing theapplication. Using this functionality one can view a lot ofdiagnostic

ASP.NET : __VIEWSTATE Bug !

13 Oct 2013 by ASP.NET Community

When you Try this on Asp.net 2.0 WebSite:http://www.YouWebsite/default.aspx?__VIEWSTATE=COUCOU!You will have something like that:Server Error in '/'

25 Nov 2009 by AspDotNetDev

You are setting isRunning to true after the first iteration. Since the if statement inside your for loop checks isRunning, it will skip over all but the first item in the for loop.When you say timer.Start(), the greenCount() method will never actually be reached until the timer() method has comple

Large Collections in Native and Managed Code (VB, C++, C#) - Part I

26 Mar 2017 by Aydin Homay

In this article, I tried to show a real benchmark based on presser test method, for a Big Data collection deals on C++, C#, and VB.NET.

A simple generic TreeList

18 Aug 2010 by B. Verboven

Convert a generic list of (recursive) objects into a simple hierarchical TreeList

A simple generic TreeList

18 Mar 2012 by B. Verboven

This is an alternative for "A simple generic TreeList".

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

4 Sep 2012 by BeStelios

Hi, I have created an ICollectionView:private ObervableCollection MyCollection = new ObervableCollection();public ICollectionView View {get; private set; }private void Init(){ CollectionViewSource Cvs = new CollectionViewSource(); Cvs.Source =...

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...

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 =...

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

Collections within a collection?

13 Jun 2011 by BobJanova

The collection should be within the parent object when that tree relationship makes sense – i.e., if a fruit is associated with exactly one person. For any individual item of fruit that may be the case, but for fruit types, it is not. So I would go for something likeclass Person {...

[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

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.

How to send array to button in HTML page

30 Dec 2018 by Bryian Tan

Not clear how the selectedIDs is being generated. I think the following save(['']) should work if selectedIDs = '1','2','3' A quick work around, in the save function, use the split() function to split the selectedIDs into array object String.prototype.split() | MDN[^]

C++ & STL: Reading a text file into a collection with little code

12 Apr 2011 by CalicoSkies

How to use istream_iterator and the copy algorithm to populate an STL collection from a text file with very little code

Convert IList to integer

30 Dec 2014 by chandra sekhar

I have a list like IList backplanes = panel.Items.Where(x => x is BackPlanes).OrderBy(x => x.Index).Cast().ToList(); backplanes = backplanes - 1;I am getting an error like Operator - cannot be applied to operands of type...

Increment the list from the last known value

27 Jan 2015 by chandra sekhar

I have a list like AncillariesList = new ObservableCollection();and it contains a value named Lineno.So if the list contains some 20 values and the last value is 1200, i want to increment from the last value when the user click on add button.How can i achieve this??

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

18 Feb 2015 by CHill60

An alternative approach (I'm not suggesting it's the best one!)You could have a Dictionary of , string>. For example, using your data which I've deliberately changed the order on, and just using string for the object for now var original = new...

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);

25 Nov 2009 by Christian Graus

timer.Interval = TimeSpan.FromMilliseconds(1); This is insane. You think you can see one millisecond ? 30 milliseconds is WAY too short. And why have a timer if you're going to use a counter inside it ? Why not set the timer to 500 milliseconds and just swap every time ?

WPF. Trying to locate source of unhandled exception.

19 Nov 2013 by cigwork

Getting "random" crashes in application, _probably_ due to threading issues. One of our favourite search engines turns up : Found SO Q.[^] Which has similarities, but a blanket swap of collections, as suggested in the SO response, isn't an option in the case I'm dealing with. I'd be...

Distinct with nested collections.

25 Oct 2012 by cjb110

I've got the following setup:class A{ ObservableCollection Bs {get;set;}}class B{ string Title {get; set;} ObservableCollection Cs {get;set;}}class C{ string Title {get;set;}}I'm trying to get a list of unique Title's in the entire of A.So far...

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 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...

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

22 Feb 2011 by cp.soni

Plese see following link, http://blogs.msdn.com/b/vinsibal/archive/2008/05/20/wpf-3-5-sp1-feature-ieditablecollectionview.aspx[^]This may help in giving some hint. Not sure if you have already gone thru with that.Edit : Provided the correct link.

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()); ...

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...

[C#] Multithreaded Datagridview control binding to collection

25 Jul 2011 by DaanSieben

Hi,Current...

multi-threading

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 = ...

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.

Can I add a helper overload to a collection?

8 Jan 2019 by Dave Kreskowiak

Create your own collection type, inheriting from Collection: public class TextEnhancementCollection { public void Add(int offset, int length) { Add(new TextEnhancement(offset, length); } } Create your collection instead of using List: ...

Entityframework persisting multiple records

24 Jun 2020 by Dave Kreskowiak

Couldn't tell you what you're missing. There's nothing that stands out as wrong with the code you posted. EF is writing 125 records because your code is giving it 125 objects to write. You're going to have to step through the code,...

Progress Bar Thresholds

15 May 2010 by DaveAuld

See this article;NeroBar[^]

A Lazy Stream Implementation in C++11

25 Jun 2018 by David Serrano Martínez

A lazy stream has been implemented in C++11, so as to highlight the functional capabilities of this new specification

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.

Yield! Reconsidering APIs with Collections

26 Dec 2013 by Dev Leader

In this article, I’d like to go over a couple of different approaches for an API and then explain why the yield keyword might be something you consider next time around.

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!

How to create Collapsible Menu Control in asp.net?

10 Mar 2014 by Dineshkumar Ramakrishnan

Hi ,I want to create a Menu Control in asp.net, which is placed in the left pane of my UI Screen.I need this menu control with Collapsible and Expand Menu feature, That is,Main Menu-1 Sub Menu-1 Sub Menu-2Main Menu-2 Sub Menu-1 Sub Menu-2 From Above Shown...

Hi i need to get a part of string in string array

17 Mar 2012 by dkgawriya21

string[] strArray = new string[5];strArray[0] = @"C:\MyFolder\Software";strArray[1] = @"C:\MyFolder\Admin";strArray[2] = @"C:\MyFolder\Accounts";strArray[3] = @"C:\MyFolder\HR";strArray[4] = @"C:\MyFolder\Maintainece";foreach (string node in strArray){ string[] strpart...

Filtering a large collection (28000 members) as the user types

7 Sep 2016 by DRD94

What I have attempted to do is filter an ObservableCollection of Companies as the user is typing into a TextBox. The user is able to check CheckBoxes to add further criteria to what they would like to search on. Sorry if this is a particularly long example but as I said, the method is very...

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

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

14 Jan 2022 by Electro_Attacks

I've written a custom ToolTip Class, that has multiple Settings which were contained in a seperate class called ToolTipInfo. I've managed to make them all Displayed in the Designer and all value changes were saved, except of my Collection...

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...

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...

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:

filter values using Dictionary in classes.

7 Jan 2014 by Erik Rude

Since it seems you like LINQ - here's a good start. look at the group by examples:http://code.msdn.microsoft.com/101-LINQ-Samples-3fb9811b[^]

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...

Convert data table into collection without using loop

10 Jun 2015 by F-ES Sitecore

public class Person{ public int ID { get; set; } public string Name { get; set; }}DataTable dt = new DataTable();dt.Columns.Add("ID", typeof(int));dt.Columns.Add("Name", typeof(string));dt.Rows.Add(1, "John");dt.Rows.Add(2, "Dave");List people =...

csharp read txt add collection write txt how ?

17 Oct 2012 by fjdiewornncalwe

We're not going to do your homework for you, but I will give you some pointers.1) You'll need a collection object to put the words into as you read them.2) Before you actually insert a found word into the collection, you'll need to make sure that the word doesn't already exist in the...

Wpf: adding new row to datagrid, but there's no default value

31 Aug 2021 by Flidrip

My DataGrid is bound to an ObservableCollection in my ViewModel. I add new rows via a command that looks like this: public void AddItem() { MyObservableCollection.Add(new MyClass()); } How can I set default value for a...

Java.lang.numberformatesception: for input string: ""

3 May 2018 by four systems

Hello, The code for buffered reader that reads numbers from file and sorts them is: package inout; import java.io.BufferedReader; import java.io.FileReader; import java.io.IOException; import java.util.ArrayList; import java.util.Collections; import java.util.List; public class...

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...

best Casting Collection

27 Sep 2013 by Fredrik Bornander

Unless the callers need to change the result set then I'd recommend returning a IEnumerable of Students instead.public static IEnumerable Show() { using (var DB = new UniversityDataContext()) { return DB.SPShow(); // Might want to ToList here to prevent deferred...

Comparing two collections

19 Jul 2023 by FuFu Dev's

I have a two models (Current and Original) that have the same properties. I want to build in a validation to check if one of the properties (Address - which is a collection consisting of "Country, City, Suburb, Code") have the same values or they...

Problem in splitting values

14 Sep 2015 by ganeshbdas

try this solution string value ="France;Japan;Russia;China;\"India;New-Delhi\";\"NewZeland;Wellington\";England'"; string ReplaceDoubleQuote = value.Replace("\"", " "); string[] words = ReplaceDoubleQuote.Split(';');

Adding existing items to collection editor

27 Sep 2018 by Gdno

Please see if this helps you in some way, see that in the "TargetControls" property of the control that is in form1 you can select the controls of the same type, to appear all the controls is just to change the control code, where is ExampleControl you changes to Control. Link to demo:...

custom-controls

Persist collection at designtime

21 Feb 2019 by Gdno

Hello, Im creating a component that I call CustomerComponent, this component has only one property called Customers that receives a collection from my Customer class. Im trying to create a Form to edit this collection at design time through UITypeEditor. However, the values added at design...

Observing Changes to an Underlying Array

28 Feb 2011 by George Tryfonas

An ObservableCollection wrapper for an array which notifies the observer about changes to its underlying array

multi-threading

B-Tree Sorted Dictionary

26 Jan 2024 by Gerardo Recinto

In-memory B-Tree sorted dictionary

Get count of items in a list of double that sum closest to 1 wiithout going over

12 Jul 2018 by Gerry Schmitz

Effective wooden board cutting algorithm - Stack Overflow[^]

Generic Control help

7 Jul 2014 by Gold$Coin

Hi all,I was creating a control that has a Interface ("IMyInterface") and a ItemsSource of type IEnumerable. on run time the ItemsSource will be assigned with the Collection (ObservableCollection, List or any other collection type) with class type as belowclass with my IMyInterface...

Generic Control help

7 Jul 2014 by Gold$Coin

changed the binding type and implemented the other way arround.

Applications slow down when getting distinct of 50K+ records from datatable in C#

2 Oct 2016 by Gold$Coin

I am having Application slowness when i suppose to get distinct out a DataTable which has 50k+ records. i am using the below code to do it/// /// Generate Distinct Data Table from the Data Table Generated from server. /// Func

Changing values in a Dictionary class

6 May 2010 by Gordon Kushner

If you try to enumerate through a Dictionary's key collection and attempt to change the values as in the code below, Dictionary _items = new Dictionary();...int i = 0;//Attempt to set the values for this Dictionary item.foreach (string key in...

Wpf: how do I display a collection in a datagrid, where the collection also contains another collection

12 Feb 2023 by Graeme_Grant

This link will show you how: DataGrid with row details - The complete WPF tutorial[^] Here is a little demo with Order > Product grouped data structure: public partial class MainWindow : Window { public MainWindow() { ...

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

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

19 Mar 2024 by Graeme_Grant

I am not sure what you are trying to do however I'll show you how to handle each item in the ObservableCollection. The Item class needs to implement the INotifyPropertyChanged Interface (System.ComponentModel)[^]. Microsoft provide a sample: How...

Wpf: how do I display a collection in a datagrid, where the collection also contains another collection

13 Feb 2023 by Grant Mc

Hi. Lets say I have a collection called Orders, and one of the members in the collection, is another collection called Products. So if I have an order, say ID = 001, and it has two different products, I would like to show this on a DataGrid,...

Wpf: how do I display a collection in a datagrid, where the collection also contains another collection

13 Feb 2023 by Grant Mc

OK, still working through this, but here is what I have so far. public partial class MainWindow : Window { MovieCollectionViewModel movieCollection; ObservableCollection actors; public MainWindow() { ...

Enumerable, Serializable Abstract Tree

25 Jan 2016 by GravityPhazer

This article demonstrates how you can simply enumerate any generic tree depth-first as well as breadth-first using the described construct. Trees can be serialized binary (using the BinaryFormatter), custom binary and as XML.

WRL Collection Library Ported to Native C++

6 Dec 2015 by Gregory Morse

WRL Collection library ported to native C++

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

Binding not working when custom control is used in a datagridtemplatecolumn

6 Mar 2024 by hardover

Binding not working when Custom Control is used in a DataGridTemplateColumn My charge is to provide a control that can be used to select multiple items from a list of items. The items are classification tags. The object is a Tag. It has three...

custom-controls

Binding not working when custom control is used in a datagridtemplatecolumn

12 Mar 2024 by hardover

With guidance from others, I have solved the problem. The key was to use the PropertyChangedCallBack to manage when the SelectTags List was bound. In summary, the solution involves capturing the point at which the actual List binding takes...

custom-controls

Hi i need to get a part of string in string array

14 Mar 2012 by HarisJayadev

Hi I have a string array, from which I want part of strings to bind dropdownlist Ex: string[] strArray = new string[10]; strArray[0] = "C:\MyFolder\Software";strArray[1] = "C:\MyFolder\Admin";strArray[2] = "C:\MyFolder\Accounts";strArray[3] =...

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...

Bee: A Suite of Self-Balancing Binary Tree Based Dictionaries

13 Sep 2019 by honey the codewitch

A B-tree, an AVL tree, and a Splay tree in C#

Proper List Support in C#

17 Nov 2019 by honey the codewitch

Implementing full list support over custom data structures in .NET