C # Notes

1. compare strings   Private void button#click (Object sender, eventargs e) {If (string. compare (textbox1. text. tolower (), textbox2.text. tolower () 0) MessageBox. show ("string 1 is greater than string 2", "info", messageboxbuttons. OK,

C # Windows Service Installation post)

  Link: http://dev.yesky.com/499/7632999.shtml Add and install components: Right-click the design page of the Windows service you added, and select Add InstallationProgram. A new page is displayed, with the following controls:

How to use C # To calculate the intersection and union of two Arrays

String [] a1 = {"1", "2"}; string [] a2 = {"2", "3 "}; ilist jiaoji = new list ; ilist bingji = new list ; // intersection foreach (string S1 in A1) {foreach (string S2 in A2) {If (S1 = S2) jiaoji. add (S1) ;}/// Union foreach (string s in A1)

Obtain the argb value of the color in C #.

In C #, obtain the argb value of the color: Color has four elements: A (alpha, transparency), R (red, red), g (green, green), B (blue, blue ), all are of the byte type. You can combine them into an int32. Example: Int mycolor;Color c = color. Red;

Some knowledge points about strings in C #

CodeFor example, refer to the original article.   1. A string is a string object whose value is text. Internally, these texts are stored as a read-only set of char objects, where each object represents a Unicode Character encoded in a UTF-16. C #

C # multithreading-semaphore)

Semaphores are simply for thread synchronization, or to limit the number of threads that can run. So how does it limit the number of threads? It has a counter. For example, if you want to limit up to five threads to run the counter, the value of

Interpreting Regular Expression 1 in C #

Author: Liu Yanqing For yearsProgramming LanguageAnd tools support regular expressions ,. net base class library contains a namespace and a series of classes that can fully utilize the power of Rule expressions, and they are also compatible with

Boring and boring "work", C # encryption program

Recently I am bored writing a function for string encryption and decryption ........ThisAlgorithmSimple. I call it BT encryption. Haha. Why is it Bt (abnormal) encryption?That's because of its encrypted results! Haha .. Try using this encryption

C # common date and time

-- Datetime numeric type System. datetime currenttime = new system. datetime (); 1.1 take the current year, month, day, hour, minute, second Currenttime = system. datetime. now; 1.2 get current year Int year = currenttime. Year; 1.3 take the current

C #4.0 dynamic type

Static and Dynamic types Static languages such as C #, C ++, and Java all perform type checks during compilation. In contrast, dynamic languages such as JavaScript, Perl, and Ruby all perform type checks at runtime. C # was initially designed to

C #4.0 optional parameters

One of the new features in C #4.0 is named parameters and optional parameters. Naming parameters: when calling a method, you can specify the parameter name instead of passing parameters by location; Private void func (string STR, int number,

C # example of the ComboBox auto-completion Function

Datatable dt = new datatable ();DT. Columns. Add ("name ");DT. Columns. Add ("VV ");DT. Rows. Add (New String [] {"Wang Yi", "x "});DT. Rows. Add (New String [] {"Zhao Yi", "Z "});DT. Rows. Add (New String [] {"", "Y "});DT. Rows. Add (New String []

C algorithm learning notes (2)-Binary Search Tree

Original address: C algorithm learning notes (2)-Binary Search Tree Search operation If the keyword value of the root node is equal to the search keyword, it is successful.Otherwise, if the value is smaller than the key value of the root node,

Experiment 1 C ++ Basics

1. Purpose and requirements of the experiment Objective: To quickly master the C ++ programming method and understand the C ++ enhancement functions, including: (1) use of input and output streams; (2) overload, default parameter; (3) reference; (4)

Algorithm design and analysis-finding the maximum sub-segment and problem (brute force method, divide and conquer method, Dynamic Programming Method) C ++ implementation

Algorithm Design and Analysis -- finding the maximum child segment and Problems Problem description:   GivenNA sequence composed of Integers (A1,A2 ,...,An).  When All integers are negative integers, the maximum child segment is 0. Use the brute

How to avoid repeated opening of the same MDI child window in C #

1: // is it enabled? (Judge by loop) 2: foreach (Form childrenForm in this.MdiChildren) 3: { 4: // check whether the current subform name is used 5: if (childrenForm.Name == "FormExaminee") 6: { 7: // If yes,

C # Control name abbreviations

spl

Public controls Button BTN button Checkbox chk check box Checkedlistbox CKL displays a list of items. Each item has a check box on the left. ComboBox CMB drop-down list box Datetimepicker DTP Time Control Label LBL text list Linklabel LLB supports

C # Deep copy

1. Deep copy and light copyCopy is usually referred to as copy or clone. Copying an object is a new object that is "identical" from an existing object. Although all objects are replication objects, the new objects copied by different replication

C # pre-compiled commands with essential knowledge

C # pre-compiled commands with essential knowledge Author: Alen Source: IT expert network forum T|T--> Pre-compilation is generally used to prevent repeated inclusion and compilation of header files. The pre-compilation command indicates the

C # value type and packing [translation]

I have translated this article well and explained it clearly, especially in terms of text and text. It is easier to understand than the SDK provided by Ms, I have read it several times, but I still understand it. I will also translate a series of

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