C#

MD5 is short for Message Digest Algorithm 5 (information Digest Algorithm). MD5 is a Hash technology that is widely used in encryption, decryption, Data signature, and data integrity verification. Any file, whether it is an executable program, image

In. Net, Microsoft provides us with many different methods for creating object instances, and their speeds are different. The following lists them one by one. Use the new Keyword This is the most common and fastest way in. Net: Code highlighting

Expansion solution:In the past, existing class libraries were extended, and feasible methods were to directly modify or derive the source code. Notes for extension methods: The extension method must be defined in a static class, and the extension

1. WebService calling in cs background programA. Use the namespace and class name to directly callExample:WebService ws = new WebService ();String s = ws. HelloWorld ();B. Call by adding a WEB reference. First, add a WEB reference and use a URL to

Enum is an enumeration type. It is the same as struct, int, single, and double. It belongs to the value type and is stored in the stack. It does not need to allocate internal space when it is created, so it is good for program performance. Why

Although MS provides us with a variety. net framework library, our program C # development brings great convenience, but sometimes, some control libraries with specific functions still need to be provided by a third party or written by themselves.

1. Mutex class MSDN simple description: When two or more threads need to access a shared resource at the same time, the system needs to use a synchronous mechanism to ensure that only one thread uses the resource at a time.MutexIs a synchronization

Windows Forms DataGridView datagridoes not provide the function of merging cells. to merge cells, use Graphics. DrawLine and Graphics. DrawString in the CellPainting event to "Draw ".The following code merges cells with the same content in the 1st

Note:1. The field name of the T class in IExecuteQuery must be the same as the column name of the SQL statement in SQL _exp to fill in the object class.   2. The IExecuteQuery returned by executing ExecuteQuery () cannot be used for multiple

How to Use the C # event to monitor variable changes? This is a very common problem. In addition, if events can be used to solve the problem, it will bring great convenience to programming while maintaining excellent performance. The complete code

Simulate how to monitor changes to a specified directory. 1. Use Timer to detect changes in folders at intervals, mainly to determine the last time .? 2. Can monitoring be implemented based on the Api or class library provided by the

1. Scenario: The computer is connected to Progin SBT-268 GPS receiving instrument through Bluetooth, the client program can read the information received by the instrument. 2. Implementation function: the program can connect to the corresponding

To use reflection to dynamically call class members, you need a method of the Type class: InvokeMember. The statement for this method is as follows (Excerpted from MSDN ): Public object InvokeMember ( String name, BindingFlags invokeAttr, Binder

C # What are the differences between static and non-static methods? Let's use this article to explain it to you.   The C # class can contain two methods: the C # static method and the non-static method. So what are their definitions? What are

Enumerable. First MethodReturns the first element in the sequence.Enumerable. FirstOrDefault MethodReturns the first element of the sequence. If the sequence does not contain any element, the default value is returned.Enumerable. Single

Using System. Diagnostics; Using System. IO;   Private void btnRun_Click (object sender, EventArgs e){TxtResult. Text = "";ProcessCommand ("Ping.exe", this.txt Address. Text );ProcessCommand ("Ping.exe", this.txt Address. Text );}   Public void

Enumeration type (also called enumeration) is a very interesting value type. It not only improves the readability of the program, but also reduces program changes caused by business changes. In addition, the enumeration type is strongly typed. The

1: Create an installation and deployment projectOpen VS, click "Create Project", select "other project type"> "installation and deployment"> "Installation Wizard" (the same is true for the installation project), and click "OK" (for details, see)The

Application of Attribute in Interception Mechanism From this section, we will discuss the advanced application of Attribute. For this reason, I have prepared a practical example: we have an order processing system. When an order is submitted, the

1. Use Pascal rules to name methods and types. Pascal case indicates the first letter of a word in the name in uppercase.Public class DataGrid{Public void DataBind (){ }} 2. Parameters for naming local variables and methods using Camel rules. camel