Most anwered ".net" questions
The Microsoft . NET is a set of libraries and functions that are part of the Basic Class Library (BCL), such as user interface functions, data access, connectivity, cryptography, web development, mathematical algorithms, and network communication.
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71
votes8
answers49747
viewsHow do I remove accents in a string?
I have a string áéíóú That I want to convert to aeiou How do I remove accents? Need to save to database as a URL.
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8
votes8
answers2805
viewsHow to know which is the last element on a list?
I am doing a dynamic sql query, in which I use lists, my problem is, how to know which last element of this list Follow the code made so far: List<string> campos = new List<string>();…
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15
votes8
answers2223
viewsError: not all code paths Return a value
I would like to understand why my code is causing the error not all code paths Return a value using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using…
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34
votes7
answers14277
viewsWhat can C++ do that C# can’t?
Being a programmer . Net but with an old passion for C++ (which has grown since C++11), I was with this curiosity. I know . Net can be "extended" with C++/CLI, but I would like to know what C# pure…
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7
votes7
answers1103
viewsRemove part of string until nth occurrence of a character
I have a string that always returns in any of these formats: "0001>0002>0003>0004>0005" "abcdef>ghi>jkl>mnopqr>stuvx" Always has the character > dividing something.…
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8
votes6
answers1227
viewsProperty readonly . NET
I received this question in a test and could not answer: "How is it possible to declare a property readonly in . NET / C#?"
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7
votes6
answers5869
viewsHow to know the number of a week in each month
I am working on ASP MVC4, and would like to know the number of weeks in a given month to generate a list of dates. For example, the user inserts a week, and in that week of each month I will…
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3
votes6
answers6055
viewsPart of the Label in Bold?
How to place a part of the string of a Label in the Windows Form in bold via code in c#. Someone knows something via code for that?
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11
votes6
answers11946
viewsConverting a string to int?
How best to convert a variable string for another variable of the type int?, namely, a nullable of int? Performance is very important in this case because I will be converting several values within…
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27
votes6
answers8712
viewsHow and when to use Finally after a Try?
First I would like to know why in using the finally What are its advantages? It really only serves for when an exit occurs from within the scope of a block try-catch, as when some return or goto…
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59
votes6
answers10591
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14
votes6
answers2762
viewsHow to walk an Enum?
Here’s what I need to do: string and go through it and pick up each letter found and add with its corresponding value, type: a = 1, s = 19 and etc. Well, I made a enum with all the values of string,…
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21
votes6
answers502
viewsEmpty semicolon doesn’t make a mistake?
I was working on a project and unintentionally bumped into the semicolon that ended up being inserted well after a if. I was intrigued because Visual Studio did not point out as an error, and when…
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11
votes6
answers1056
viewsHow to make a Split for when there is a letter in the string?
I’d like to make one string be divided with the .Split() every time there was a letter. Example: To string: 97A96D112A109X115T114H122D118Y128 Would become a array with 9 values: { 97 96 112 109 115…
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17
votes5
answers2401
viewsHow do I merge two results of a query?
I am developing an application in C# and I would like to know how to put together two results of two darlings SQL in one. I have the following code: public List<MalaDireta> ObterMalaDireta() {…
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57
votes5
answers7848
viewsWhat is the difference of string vs string?
I wonder what the real difference is between String (capital letters) and string (s tiny). Apparently the two have the same goals, but which is "best" to use?
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11
votes5
answers2480
viewsCheck if day exists in month
I need to verify/validate if a (numerical) day exists in a given month. For example, I have the day 31, and as it does not exist in the month of February the condition will fail. I think a simple if…
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16
votes5
answers14262
viewsHow to sort list with complex object by one of its properties?
I have a list of objects and I want to sort the list by one of the properties (Desc type string), how do I do this? public class Foo { public string Desc { get; set; } // Várias outras propriedades…
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74
votes5
answers2194
viewsExceptions consume a lot of processing. Truth or legend?
I’ve seen shows like this : if(!clienteExiste(1)) { return "Cliente não existe."; } and others like that if(!clienteExiste(1)) { throw new Exception("Cliente não existe."); } The second code will…
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3
votes5
answers1583
viewsHow to get the number of weeks in a date range in C#?
I would like to know how to know the number of weeks in a given date range in C#.
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1
votes5
answers38715
viewsCalling a form and closing a form in the same event
How do I call one form and close a form at the same event. For example: private void iniciar_Click(object sender, EventArgs e) { Close(); Frm1 newForm2 = new Frm1(); newForm2.ShowDialog(); }…
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votes5
answers2197
viewsHow to create a switch.. case with value ranges?
If a total of days is over 30 and under 60, I do something. If it’s over 60 and under 90 I do something else and so on. How do I do this case? Did the case is the best option?…
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23
votes5
answers573
viewsWhy are you wearing shorts?
The guy short corresponds to a 16-bit integer - it is literally syntactic sugar for type Int16. The current processors are all 64 bits, even on the most machines low-end. Some older machines still…
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21
votes5
answers6769
viewsShould I use GUID or int as the primary key?
I’m about to start a new project in MVC 4 with Entity Framework, searching I found several examples here in Sopt of models that use GUID as ID and some doubts have arisen me: What is the advantage…
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20
votes5
answers1879
viewsWhat is the difference between an explicit cast and the operator as?
Whenever I convert an object to a specific type, I use a cast explicit, for example: private void textBox1_Leave(object sender, EventArgs e) { TextBox textBoxTemp = (TextBox)sender;…
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7
votes5
answers2024
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5
votes5
answers4008
viewsRegex take from one point to the other within a text
I have the following text:: From: .... blabla bla Message: blablabalab //linha em branco From: .... blabla bla Message: blablabalab //linha em Branco From: .... blabla bla Message: blablabalab How…
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11
votes5
answers1656
viewsCreate objects within a list without for/foreach C#
private List<Compra> CriarCompras(int numComprasParaGerar) { List<Compra> lstCompras = new List<Compra>(); for (int i = 0; i < numComprasParaGerar; i++) lstCompras.Add(new…
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5
votes5
answers5699
viewsHow to get the current iteration index of a foreach?
Usually in order to get the current iteration index within a foreach, I do it this way: int i=0; foreach (var elemento in list) { // Qualquer coisa i++; } I believe there are other methods to get…
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5
votes5
answers29254
viewsHow to convert date to dd/MM/yyyy format?
After I published my app, I started to receive the dates in the American format like this:9/14/2016 12:00:00 AM How to format to dd/MM/yyyy? I tried to convert.ToDateTime() more does not work.…
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9
votes5
answers819
viewsIs the rest of the code inside Try executed after finding Exception?
The rest of the existing code within a try is executed after finding a exception or jumps right into the code inside the catch(Exception e) try{ x = 10; //alguns erro de try catch x = 20; } catch…
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6
votes5
answers497
viewsPrint string in reverse
Why can’t I print that string in reverse? I know there is possibility to use another simpler way, but I want to understand the error. static void Main(string[] args) { string frase = "Diego lima de…
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1
votes5
answers1664
viewsI want to put the number of characters and put whether it even or odd
But my code is going wrong. namespace Impar_ou_parr { class Program { static void Main(string[] args) { string NumLetras; Console.WriteLine("Digite uma Palavra: "); NumLetras = Console.ReadLine();…
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26
votes5
answers1461
viewsIs it possible to code the size of the object in memory?
If I need to calculate the occupied space to make any decision has how to figure out the size that each type takes to check how much memory will be occupied if I allocate multiple instances of it?…
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11
votes5
answers1059
viewsIs it possible to convert a 16-bit number to a single byte?
If I create the following expression: Int16 numero = 2017; byte m = (byte) numero; m will have the value of 225. Okay, how do I get 2017 from the byte m (reverse operation) again?…
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11
votes5
answers1530
viewsDo programs written in C# depend on the . NET Framework to run?
Once compiled a C# code depends on the . NET Framework installed on the machine to run, similarly to Java?
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4
votes5
answers212
viewsGet array object by description in index
It is possible to use the property of an object as an index of a array, as described in the example below? using System; public class Program { public static void Main() { var myObjectArray = new…
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13
votes5
answers453
viewsHow to separate "words" in Camelcase in C#?
How can I separate "words" into Camelcase using hyphen for example? String: string example = "CamelCase"; // CamelCase para: // Camel-Case and enumerator: enum Example { CamelCase }…
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12
votes5
answers5490
viewsCount the number of months between one date and another
I would like your help to basically count the amount of months between a date and another. I’ll give you an example but what I want is basically just an accountant. Ex: quantity of months between…
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9
votes5
answers1894
viewsTest for string fill
When reading a post on good programming practices, more related to validating the filling of strings, I came across the following: Very slow check: string ret = String.Empty; if…
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6
votes5
answers146
viewsIs there a disadvantage or is it harmful to use null types?
I always have trouble receiving null values from the database because I forget to use the cancellable types and face the same problem: The type cannot be null This usually happens with attributes…
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31
votes4
answers28968
viewsWhat is the most appropriate way to concatenate strings?
There are different methods for concatenating strings, such as Concatenating with the operator "abc" + str Formatting String.Format("abc{0}", str); Using the Stringbuilder new…
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3
votes4
answers7116
viewsHow to hide the time of a "Datetime?" field in the user interface?
The time is appearing for the user. My question: it is possible to hide the time and show only the date? How are you showing: Model code: View code:…
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14
votes4
answers2252
viewsWhat is the advantage of hiding the class constructor in favor of a static method (no .NET)?
My leader uses this pattern in ALL his classes (I’ll give the examples in C#, but it goes for any . NET language): public class MeuTipo { private MeuTipo() { } // esconder o construtor public static…
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5
votes4
answers3081
viewsLimit number of characters per line
It is possible to limit the number of characters per line of a textbox multiline using Windows Forms C# and . Net 3.5?
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3
votes4
answers3125
viewsDealing with collisions in Dictionary C#
I need to map a string array to a dictionary so that I can later test whether an informed string is valid by checking if it is part of the dict, additionally would like to recover some other…
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2
votes4
answers6360
viewsBreak row into table cell in CSV format to be read by Excel
I have the following code that inserts a value in an excel cell for export context.Response.Write("aa\r\nbb\r\nccc"); /r/n breaks the line but writes in the cell below, would like to break the line…
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5
votes4
answers4168
viewsConvert string to Time
I got a column in the database that gets a guy varchar which corresponds the hours on my app ("HH:MM"). I need to convert this string to a type TIME and then concatenate with a type DateTime.…
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55
votes4
answers9003
viewsBest way to deal with Exceptions
During my work I learned a way to deal with Exceptions, but I don’t know if it’s very good. Here’s an example of the code: class Program { private static void Main(string[] args) { try { Foo(); }…
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6
votes4
answers6284
viewsHow does an empty constructor work?
Definition: Creating an empty constructor attributes if not set will be set to the default value of guy, example: int default value is zero. Context: Use a structure that returns entities from the…