Implementation of verification code (Chinese character) in C#winform

The Code is as follows: Using System; Using System.Collections.Generic; Using System.Linq; Using System.Text; Using System.Windows.Forms; Using System.Drawing; Enum chinese{in, on, ancient, early, period, person, name, one, like, all, very, park,

Async and await asynchronous in C#winform

1 buttons, 2 textbox, the following can be correctly asynchronous, the form will not die, TextBox2 will first have results, TextBox1 again have the results Private async void Button1_Click (object sender, EventArgs e) {Does ();TextBox2.Text = "1";}

C#c#textbox Set scroll bar

There are always problems in the learning process, so write down First of all, the problem is that I modify the following diagram to produce a vertical scroll bar without a horizontal scroll bar; Curious why there is no horizontal scroll bar Below,

The interrupt method of C#thread

Interrupt method, you can only break a thread that is in the WaitSleepJoin state, and the thread resumes execution when the thread is not waitsleepjoin. Calling the interrupt method produces a threadinterruptexception exception Class Program

c#7.0 ref locals and returns (local variables and references are returned, previously owed to everyone, now fill up)

I have not read the original please visit: [Dry Goods to attack]c#7.0 new features (VS2017 available) No more nonsense, go straight to the point. First we know that the REF keyword is passing the value to a reference pass So let's take a look at ref

Basic knowledge of C#winform programming __ Programming

1. Pass the value of the first form to the second form, and use the overloaded constructor of the second form Form2 form2=new form (STR1); 2. To return the value of the second subform that pops up to the parent form, you need to use attributes such

C # uses Newtonsoft's json.net for serializing and deserializing objects

Json.NET is a popular. NET high-performance JSON framework that enables the serialization and deserialization of objects using Newtonsoft's json.net. In C #, you can quickly generate JSON and interpret JSON by using Json.NET, which allows you to

A detailed example of the assistant of the Learning Committee written in C #

The application uses C # to write the WinForm interface, and Python writes processing scripts. Implement its functionality by calling Python's packaged exe executable file. You can download it directly from the application. Learning Committee

C # HTML parsing example-the case of the stars

[Preface] After switching from CSDN to cnBlog for a while, we found that cnBlog also has a function similar to CSDN, that is, flash memory. Flash uses the Lucky Star mechanism, and also triggers a large number of people to brush the stars if they

C # Notes For Calling C ++ Functions

I recently developed a client that interacts with hardware. The Development Kit is written in C ++. The client must be implemented in C #. I have encountered some problems during development, make yourself available for future reference.

TestDriven. NET & ndash; Quick Start

TestDriven. NET-Quick Start [translation] Introduction This section provides a quick start guide to use TestDriven in any version of vs. NET. NET TDD (test-driven development) is a habit of writing unit tests before you write your code. Write

C # design Pattern (6) -- Prototype Pattern)

I. Introduction In software systems, when the process of creating a class instance is expensive or complex, and we need to create multiple such class instances, if we use the new operator to create such a class instance, it will increase the

How to use C # To degrayscale an image

A grayscale image is used to discard all the color information of the image and display the 24-Bit Bitmap information in 8 bits. The grayscale image has a total gray level of 256, that is to say, to convert a point of a 24-Bit Bitmap (such as (255,25

Summary of Methods for Improving UAC permissions in. NET

[Digress] Since Vista, The UAC (User Account Control) function has been added, so that the administrator User does not have the administrator privilege to Control all functions at ordinary times, therefore, when calling many important functions, you

How to optimize the speed of list traversal in C #

A database table (id, name ,...) There are 0.1 million records. It may take a long time to search for name = 'guoguo'. However, if you create an index for the name, then, query with name = 'guoguo' will become very fast (how fast? You can try it

How to assign values to chemical symbols in the TextBox Control

During our programming, sometimes it is not easy to assign a chemical symbol (such as water molecules H2O) to TextBox. The steps for implementing input water molecules (H2O) are listed below: 1. Run the windows program charmap.exe and the

IPAD demo created with WPF (download source code included)

I just learned about WPF and then built a small example to simulate WPF. The content is rough when new users are on the road. This is the result after running.All my possessions for a moment of time. Date Time Weekday Go   Background code:

Csharp: Send Email

/// /// producer /// aggregation /// 20130816 /// /// recipient /// recipient name /// subject name /// content /// public bool SendMailMessage (string, string toName, string subject, string body) {bool re = false; try {int id = 1;

Mono ios uncertain crash Solution

I have been using mono for ios development for a year. I have been experiencing a headache because of the crash, and no explicit error is thrown during the crash. When debugging a bug two days ago, it was inexplicably rolled back during

Share the code in the test ~ Merge the methods that can be merged to Func.

In the object-oriented design, we often talk about "restructuring". In the reconstruction process, there is a merging method, that is, similar to, or, the method body is very long, so we need to consider them and abstract them! Original code:

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