Recent questions tagged C#

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c# - When can Process.Start() return null?

I have some code that starts a process by using Process.Start(ProcessStartInfo). I see from the ... circumstances will this happen? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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688 views

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c# - Windows Forms application option seems to be missing?

I'm learning how to design a Windows Forms Application in Visual Studio 2017. The tutorial asks me to ... their either. Screenshot attached. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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783 views

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c# - Case Sensitive Dictionary Keys

I've found plenty of info on the web about making dictionaries able to do case insensitive look-ups such that ... to add different cased keys? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - Using datasource with CheckBoxList

I use CheckBoxList in my Windows Forms application and am trying to apply a datasource for it. Having a ... to link them with MyCheckBoxList. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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735 views

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c# - Get Grid Cell by mouse click

I have a WPF Grid which is divided into 3 rows and 3 columns, i wasn't able to find a way of getting ... /> </Grid.ColumnDefinitions> </Grid> See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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796 views

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c# - The Most frequent Number in an array

I have this Array i wrote a function MostFreq that takes an array of integers and return 2 values : the more ... ; } return (Max_Freq); } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - Cannot install Microsoft Power Bi Postgre SQL connector

I am trying to use Microsoft Power Bi to connect to a PostgreSQL database. When I go to Get Data it just says ... 's driving me crazy! ? Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - ComosDB - MongoAPI - Document does not contain shard key

I am investigating using CosmosDB (previously DocumentDB), we currently use MongoDB so I am trying to use the ... , or doing something wrong? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - Add member to AD group from a trusted domain

I have two domains, in a trusted relationship, that I'm trying to manage from a C# web application. To do ... stuck. Any good piece of advice? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - The property 'PropertyName' could not be mapped, because it is of type 'List<decimal>'

I got this problem when I try to create the database with EntityFramework Core: The property 'Rating.RatingScores' could not ... .Count, 1); } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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790 views

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c# - How to get a byte array length using LINQ to Entities?

I have a Document class that stores the data of that document as a byte array. I need to check the size of ... the size of the byte array? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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732 views

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c# - I can't turn off Request Validation for an ASP.NET MVC Controller

I am trying to turn off Request Validation for all action methods in a controller by doing this: [ValidateInput ... VS2008 built in test server. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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705 views

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c# - Why should I explicitly surround with "unchecked"?

Is there anyone able to explain me this strange behavior? int i = 0x1234; byte b1 = (byte)i; byte b2 = ( ... same value. Hope it's clear now. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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750 views

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c# - Load Picturebox Image From Memory?

I can't seem to figure out how to load a pictureBox image from a bitmap in memory. Is it possible or do ... to create temp file for the bitmap? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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695 views

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c# - Checkbox in listview control

Can you have a multicolumn listview control where one of the columns is a checkbox? Example code or links would ... am using visual studio 2005 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

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c# - How to set max length of datagridview column

I have a DataGridView where the units can be entered in a TextBox column. How do I restrict the input length of this column to 6 characters? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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805 views

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c# - Returning image created by Image.FromStream(Stream stream) Method

I have this function which returns an Image within the function the image is created using the Image.FromStream ... parent stream is disposed. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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725 views

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c# - Use types of same name & namespace in 2 .NET assemblies

Out of curiosity, I've created 2 assemblies which both have a class (Class1) with the exact same ... of curiosity about language feature. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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606 views

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c# - InvalidCastException when serializing and deserializing

I have this code: public byte[] SerializeToBlob() { using (var buffer = new MemoryStream()) { var formatter = ... for storing in a SQL table? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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843 views

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c# - If yield return never occurs, is null returned?

The method returns IEnumerable via a yield return statement. If the yield statement never occurs (it's inside conditional ... with a count of 0? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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889 views

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c# - Will Boxing and Unboxing happen in Array?

I'm new to programming, As per MSDN, Boxing is the process of converting a value type to the type object ... happens in such array correct? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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950 views

1 answer

c# - What does 'GET OR SET ACCESSOR EXPECTED' mean?

using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using ... do I resolve this error? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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633 views

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c# - Parse an integer from a string with trailing garbage

I need to parse a decimal integer that appears at the start of a string. There may be trailing garbage ... standard method if it exists. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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657 views

1 answer

c# - why must return statement precede a throw statement in a catch block

The code below will complain try { session.Save(obj); return true; } catch (Exception e) { throw e; return ... one of these generate a warning? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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566 views

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c# - Built in .NET function for unescaping characters in XML stream?

So, I have some data in the form of: <foo><bar>test</bar></foo> What .NET classes/ ... in .NET using XML :( Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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882 views

1 answer

c#, Excel + csv: how to get the correct encoding?

I've been trying this for quite a while now, but can't figure it out. I'm trying to export data to Excel via a ... 1039; 1;1045; 2;1457; 2;1045; See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.0k views

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c# - Stopping TextBox flicker during update

My WinForms application has a TextBox that I'm using as a log file. I'm appending text without the form ... ListBox one character at a time. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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630 views

1 answer

c# - update and insert queries creating a deadlock

I will try to explain my problem as detailed as possible, and i would appreciate any help/suggestion. My ... (Keeping my fingers crossed) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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