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1. Top results related to how to initialize a dictionary in c# windows 10 free download

   • How to get local host name in C# on a Windows 10 universal app

     Top Answer

     Answered Oct 01, 2015 · 20 votes

     You need to use NetworkInformation.GetHostNames

     .

     var hostNames = Windows.Networking.Connectivity.NetworkInformation.GetHostNames();-

     But note that this method will return multiple HostNames.

     In my case, it returns four HostNames of which DisplayNames are MyComputerName, MyComputerName.local plus two IP addresses.

     So I guess it's probably safe to do -

     using Windows.Networking;using Windows.Networking.Connectivity;--var hostNames = NetworkInformation.GetHostNames();var hostName = hostNames.FirstOrDefault(name => name.Type == HostNameType.DomainName)?.DisplayName ?? "???";-

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     1/5

   • How to modify key in a dictionary in C#

     Top Answer

     Answered Mar 19, 2013 · 51 votes

     As Jason said, you can't change the key of an existing dictionary entry. You'll have to remove/add using a new key like so:

     // we need to cache the keys to update since we can't// modify the collection during enumerationvar keysToUpdate = new List<int>();-foreach (var entry in dict){ if (entry.Key < MinKeyValue) { keysToUpdate.Add(entry.Key); }}foreach (int keyToUpdate in keysToUpdate){ SortedDictionary<string, List<string>> value = dict[keyToUpdate]; int newKey = keyToUpdate + 1; // increment the key until arriving at one that doesn't already exist while (dict.ContainsKey(newKey)) { newKey++; } dict.Remove(keyToUpdate); dict.Add(newKey, value);}

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     2/5

   • How to initialize a BigInteger in C#?

     Top Answer

     Answered Apr 13, 2010 · 9 votes

     It should be there, did you remember to add a reference?

     Right click your project, click Add Reference, then in the leftmost tab, select System.Numerics

     Then you can add it and use it.

     Other Answers

     Answered Sep 25, 2017 · 3 votes

     You need to add the reference System.Numerics yourself as mentioned in other answers, the System.Numerics.dll should be there if you have .NET 4 installed.

     Then, if your value is really a big one and you try:

     var myBigInteger = new BigInteger(50000000000000000000000000000000000000000000);-

     You will get a compilation error:

     Bad compile constant value

     The simplest approach is to use a text literal:

     var myBigInteger = BigInteger.Parse("50000000000000000000000000000000000000000000");-

     Other Answers

     Answered Apr 13, 2010 · 2 votes

     What version of .NET 4 is your project targeting? Make sure it is targeting the entire framework not the client profile. I have just confirmed that System.Numerics.dll is part of .NET 4 Client Profile so this shouldn't be the problem.

     Once you have done this make sure that you have referenced System.Numerics.dll in your project as well.

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     3/5

   • How to initialize a struct in C#

     Top Answer

     Answered Oct 15, 2010 · 26 votes

     You can't use a property in a struct until it knows all the fields have been filled in.

     For example, in your case this should compile:

     Point p1;p1._x = 1;p1._y = 2;int x = p1.X; // This is okay, now the fields have been assigned

     Note how you don't have to explicitly call a constructor here... although in well-encapsulated structs you almost always would have to. The only reason you can get away with this is because your fields are public. Ick.

     However, I would strongly advise you not to use a mutable struct anyway. If you really want a struct, make it immutable and pass the values into the constructor:

     public struct Point{ private readonly int x; public int X { get { return x; } } private readonly int y; public int Y { get { return y; } } public Point(int x, int y) { this.x = x; this.y = y; }}...Point p1 = new Point(1, 2);

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     4/5

   • How to download a file from URL with credentials in windows application C#

     Top Answer

     Answered Sep 27, 2021 · 1 votes

     I will give you an example:

     The core idea is: verify the account password after clicking download, and download if it is correct.

     Use DialogResult to return the result of the verification.

     Use SaveFileDialog to select the location to save.

     Enter the URL you want to download into the text box.

     Main window code:

     using System;using System.Net;using System.Windows.Forms;namespace WindowsFormsApp1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void Button1_Click(object sender, EventArgs e) { login f2 = new login(); while (true) { f2.ShowDialog(); if (f2.DialogResult == DialogResult.OK) { Download(); } else if (f2.DialogResult == DialogResult.Cancel) MessageBox.Show("Verification Failed"); break; } f2.Close(); } //Download function public void Download() { SaveFileDialog sfd = new SaveFileDialog(); //Set the title of the save file dialog sfd.Title = "Please select the file path to save."; //Initialize the save directory, the default exe file directory sfd.InitialDirectory = Application.StartupPath; //Set the type of saved file sfd.Filter = "Text file|*.txt|Audio file|*.wav|Picture file|*.jpg|All files|*.*"; if (sfd.ShowDialog() == DialogResult.OK) { //Get the path to save the file string filePath = sfd.FileName; //save try { WebClient client = new WebClient(); client.DownloadFile(textBox1.Text, filePath); } catch (WebException webEx) { Console.Write(webEx.ToString()); } } } }}

     Login window code:

     using System;using System.Data.SqlClient;using System.Windows.Forms;namespace WindowsFormsApp1 { public partial class login : Form { public login() { InitializeComponent(); } private void Button1_Click(object sender, EventArgs e) { //Personal test database string myconn = @"Data Source = (localdb)\MSSQLLocalDB; Initial Catalog = Test; Integrated Security = True"; SqlConnection conn = new SqlConnection(myconn); string sql= $"select * from Test.dbo.demoAccount where userid='{ AccountTb.Text}' and password='{PassTb.Text}'"; conn.Open(); SqlCommand sqlCommand = new SqlCommand(sql, conn); SqlDataReader sqlDataReader = sqlCommand.ExecuteReader(); if (sqlDataReader.HasRows)//Satisfy the user name and password are consistent, enter the next interface { this.DialogResult = DialogResult.OK; } else { this.DialogResult = DialogResult.Cancel; } conn.Close();} }}

     Schematic diagram of correct operation:

     Test Url

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     5/5

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2. learn.microsoft.com › en-us › dotnetHow to initialize a dictionary with a collection initializer - C#

   learn.microsoft.com › en-us › dotnet

   • Cached

   Mar 15, 2024 · Learn how to initialize a dictionary in C#, using either the Add method or an index initializer. This example shows both options. How to initialize a dictionary with a collection initializer - C# | Microsoft Learn

3. stackoverflow.com › questions › 17047602Proper way to initialize a C# dictionary with values

   stackoverflow.com › questions › 17047602

   • Cached

   With C# 6.0, you can create a dictionary in the following way: var dict = new Dictionary<string, int> { ["one"] = 1, ["two"] = 2, ["three"] = 3 }; It even works with custom types.

4. People also ask

   How to initialize a dictionary?

   • To initialize a dictionary, we can enclose each set of key-value in curly braces. Internally for each pair, the compiler makes a call to Dictionary’s Add() method. This is demonstrated below: 2. Index Initializer We can also initialize a dictionary using an index initializer, as shown below.

   Initialize a Dictionary in C# | Techie Delight

   www.techiedelight.com/initialize-dictionary-csharp/

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   How to initialize a dictionary in c# 6?

   • Another way to initialize a dictionary is object initializer introduced in C# 6: To add an item to a dictionary, we use the Add method. For example: This would add "Adam" and his age of 24 to the nameToAge dictionary. To remove an item from a dictionary, we use the Remove method. For example: This would remove "Adam" from the nameToAge dictionary.

   C# Dictionary: Complete Guide [2023] - Josip Miskovic

   josipmisko.com/posts/c-sharp-dictionary

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   How to create a dictionary in C#?

   • Dictionary Builder To create a dictionary with several entries, it’s better to create a type-safe DictionaryBuilder class. Then we can use Builder’s Add() method, which takes key-value pairs instead of a dictionary. The Add() associates key with value in the built dictionary. That’s all about initializing a Dictionary in C#.

   Initialize a Dictionary in C# | Techie Delight

   www.techiedelight.com/initialize-dictionary-csharp/

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   How to initialize a dictionary TKey TValue?

   • A Dictionary contains a collection of key/value pairs. Its Add method takes two parameters, one for the key and one for the value. One way to initialize a Dictionary , or any collection whose Add method takes multiple parameters, is to enclose each set of parameters in braces as shown in the following example.

   How to initialize a dictionary with a collection initializer - C#

   learn.microsoft.com/en-us/dotnet/csharp/programming-guide/classes-and-structs/how-to-initialize-a-dictionary-with-a-collection-initializer

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5. www.techiedelight.com › initialize-dictionary-csharpInitialize a Dictionary in C# | Techie Delight

   www.techiedelight.com › initialize-dictionary-csharp

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   Apr 6, 2024 · 1. Collection Initializer. To initialize a dictionary, we can enclose each set of key-value in curly braces. Internally for each pair, the compiler makes a call to Dictionary’s Add() method. This is demonstrated below: Download Run Code. 2. Index Initializer. We can also initialize a dictionary using an index initializer, as shown below.

6. makolyte.com › csharp-initialize-a-dictionaryC# - Initialize a dictionary | makolyte

   makolyte.com › csharp-initialize-a-dictionary

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   Sep 12, 2023 · Option 1 – Initialize dictionary with values using indexer syntax. Here’s an example of initializing a dictionary with multiple key/value pairs using the indexer syntax (i.e. [key]=value): using System.Collections.Generic; var dictionary = new Dictionary< string, int >() { ["Bob"] = 1, ["Linda"] = 2, ["Teddy"] = 3}; Code language: C# (cs)

7. josipmisko.com › posts › c-sharp-dictionaryC# Dictionary: Complete Guide [2023] – Josip Miskovic

   josipmisko.com › posts › c-sharp-dictionary

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   Jan 26, 2023 · Initialization. To initialize a dictionary in C#, we first need to provide the type for the key and the type for the value. For example, for a dictionary that stores the name and age of a person, the initialization would be: C# Dictionary<string, int> nameToAge = new Dictionary<string, int>();

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8. www.gyata.ai › c-sharp › c-initialize-dictionaryGuide to Initialize a Dictionary in C# | C# Tutorial

   www.gyata.ai › c-sharp › c-initialize-dictionary

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   Dec 8, 2023 · Table of Contents. 1. Initializing an Empty Dictionary. 2. Initializing a Dictionary with Key-Value Pairs. 3. Initializing a Dictionary from an Array, List, or Other Enumerable. 4. Tips, Tricks, and Common Pitfalls. 4.1 Duplicate Keys. 4.2 Null Keys. 4.3 Key Not Found. 5. Conclusion.

9. wolfgang-ziegler.com › blog › initializingDifferent Ways of Initializing a Dictionary in .NET

   wolfgang-ziegler.com › blog › initializing

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   August 31, 2022. .NET dotnet C# TIL. I was today years old when I found out that you can initialize .NET Dictionary s like this. var dict = new Dictionary<int, string> { [23] = "foo", [42] = "bar" }; The way I was used to doing that was like this: var dict = new Dictionary<int, string> { { 23, "foo"}, { 23, "bar"} };