C#

Some operations on the C # DataTableRegular operation of the DataTable can be done by manipulating the DataTable for some things that do not need to be repeated by SQL.Method One:is also widely known as one of:YourDataTable.Columns.Remove ("column

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Lambda expressions simply write anonymous methods in a simpler way, completely simplifying the pair. The use of the net delegate type.Now, if we are going to use the FindAll () method of the generic list<>, you can use this method when you are

In Visual Studio, use a layer-relationship diagram to describe the system architecture, technology stack, and studio system architecture.   When you need to describe the architecture or technology stack of a project, you can consider using a layer-

C # dynamically execute scripts. Several script engines are involved ., Jint embedded javascript scripts support engines and are constantly updated. They support various methods and can interact with C. Https://github.com/sebastienros/jint  The

C # Call C ++ Dll, Now, the project is basically thrown to me by the C ++ buddy, and then I call it. A long time ago, I went down a c # method to call c ++ dll in the evening, and the source was forgotten. Nothing to worry about. Put it up. The

157 suggestions for writing high-quality code to improve C # programs-Recommendation 52: release resources in a timely manner, Suggestion 52: release resources in time The garbage collection mechanism automatically recycles resources implicitly (the

C # The application can only run one instance. When running multiple times, the current instance is activated and its interface is displayed. Many times, the program we develop requires the single-instance running function, that is, the entire

C # SQL Server database image access # Region database image access //////Import images to the database//////Public void Import (string filePath) {string fileName = filePath. substring (filePath. lastIndexOf (@) + 1, filePath. lastIndexOf (.)

When Android is developed in VS2015, the built-in simulator cannot debug or load the program. Is it a pitfall? vs2015android After VS2015 came out, it was determined that the changes were great. What about android and ios. For traditional people

. NET regularly sends emails, and. NET sends emails Add a Global application class Global. asax The code will run when accessing the website Global. asax code: 1 void Application_Start (object sender, EventArgs e) 2 {3 // code 4 System when the

Use C # to implement priority queue Priority queue is an important data structure. I often use ACM for questions. C ++ STL includes priority_queue. Java also has the PriorityQueue class. Unfortunately, Priority Queues are not included in. NET

Parallel Stop and Break, parallelstopbreak In a common for loop or foreach loop, break/continue is used for process control. In Parallel, there are also methods for process control, that is, the Stop/Break method of the ParallelLoopState class.1.

3. C # object-oriented: encapsulation, inheritance, polymorphism, String, set, file (bottom ), Object-oriented Polymorphism I. packing and unpacking Packing: Convert the value type to the reference type. Object o = 1; Value Type assigned to

HttpRuntime. Cache invalid, httpruntime. cache Recently, I made a newspaper content website. In order to improve the response speed, I stored the Part document list of each topic on the homepage and the second topic in HttpRuntime. cache. problems

C # Summary of encryption algorithms, C # Summary of encryption algorithms   MD5 Encryption 1 /// 2 /// MD5 encryption 3 /// 4 /// original string 5 /// encrypted string 6 public static string GetMD5 (string strPwd) 7 {8 // two methods of MD5

HttpWebRequest file download,   Service version: Go file system ssdb Github: https://github.com/dtxlink/gfs  Previous Article: ssdb, a go file server   PassBrief code for httpWebRequest File Download   class Program { static void

C # structure of learning notes, 1. Overview Structure is a data type similar to a class, but it is more lightweight than a class and is generally applicable to objects similar to Point, Rectangle, and Color. Basically, all the classes that the

Able deletes rows cyclically and DataTable deletes rows cyclically. 1. if you only want to delete a row in the datatable, you can use the delete Statement of DataRow. However, you must delete the row before letting the DataTable know, so you must

Csharp: Compare two DataTables to rows in one but not the other, csharpdatatables /// /// Accounting of book data /// /// DataTable setDataAccounting () {DataTable dt = new DataTable (); dt. columns. add ("id", typeof (int); dt. columns. add