C#

The data volume displayed when I connect to the MYSQL database today is less than that of the database. Tracking shows that the time format allowed by MYSQL is different from that allowed by MSSQL. MySqlConnection myconn = new MySqlConnection

In our development project, we often encounter the problem of host ping. Now I have encapsulated a method to ping the host,The Code is as follows:/// /// Ping the specified host to see if it can be pinged/// /// (host Address: www.2cto.com) ///

1, winform [Csharp]# Region calendar Control Private void dteStartDate_Validating (object sender, CancelEventArgs e){If (! CheckStartDateEndDate (true )){XtraMessageBox. Show ("start date cannot be later than end date ");DteStartDate. Focus ();E.

// /// Search for controls in winform/// /// /// /// Private System. Windows. Forms. Control findControl (System. Windows. Forms. Control control, string controlName){Control c1;Foreach (Control c in control. Controls){If (c. Name =

  An alternative method for using classes is to use struct, which is a lightweight user-defined type. It is very similar to a class, but there are some differences:   Struct does not support inheritance or destructor;   Struct is a value type (class

  Static void Main () { Int [] array = {1, 2, 3, 4, 5, 6, 7 }; MoveNumberArrayToEnd (array, 3 ); } Static void MoveNumberArrayToEnd (IList arrayList, int num) { If (arrayList. Count = 0 | arrayList. Count { Throw new RankException (); } Var query

  After the test, I took a break and recently wrote a Data encryption software called Privacy Data Safe. This is not a simple small software, but a very powerful software, at present, it is still in the preliminary design phase, but a successful

    Previous Article: www.2cto.com/kf/201111/410744.html 1. What is the interface definition?     A: An interface indicates a group of function members without implementing the reference type of members. Classes and structures can implement

  1. Create a text file Public class FileClass { Public static void Main () { WriteToFile (); } Static void WriteToFile () { StreamWriter SW; SW = File. CreateText (@ "c: MyTextFile.txt "); SW. WriteLine ("God is greatest of them all "); SW.

  1. Functions of the C # interface:   The C # interface is something that makes C # beginners easy to confuse. It seems very simple to use. It defines the interface and contains methods, but there is no code to implement the method, then, when the

  When a control is referenced externally from the toolbox, the System prompts: Universe cannot parse the Assembly: System. design, Version = 2.0.0.0, Culture = neutral, PublickeyToken = b03f5f7f11d50a3a. After searching online for half a day, I

  Today I have studied that in C #, cross-form call controls can be implemented without complicated methods such as custom messages. A better way for C # is to delegate. Effect Description: there are two forms: FORM1 (A button control named "Open

  C # In WinForm programming, have you ever encountered such a problem? click the button in Form1 in the main window to bring up a subwindow Form2. You want to call the Form1 function in Form2, changed the display of Form1, but found that Form1 was

    It is a headache to write multiple threads with a single thread.   In C #, multithreading is very convenient, but synchronization becomes a big problem in the case of complex tasks. google has a lot of methods:   Lock   Monitor   Semaphores

  Let's discuss whether there is a need for C # No parameter attribute? Never expose fields of the type. One of the important principles of object-oriented design and programming is Data encapsulation. If fields of the Public type are exposed, it is

  This class mainly implements the modification of the Registry, and the code is also in the vernacular, which is very simple and will be used in form development. The Code is as follows. 1 using Microsoft. Win32; 2 namespace Common 3 { 4 public

Suppose there is a string "BaSiC" that needs to be converted to a case, how should we convert it?  The simplest method is to call an api: String str = "BaSiC "; String strUpper = str. ToUpper (); String strLower = str. ToLower (); Method 2: Call the

Most software provides this function to enable automatic startup or shutdown. How to implement it is actually very simple. You only need to set the Registry to run it at startup. to shut it down, call the CMD command: shutdown-s-t, as shown

Errors are inevitable during system development. But how can we handle errors and collect as much information as possible to analyze errors, it is very helpful to find and eliminate errors. The following provides an error information collection

// If you encounter a problem today, you need to pass an initialized value to another function and return the incremental value.// Sum up the difference between out and ref by the wayPrivate void button#click (object sender, EventArgs e){// The ref