C#

The delegation, events, and lambda expressions in C # often make me dizzy. Today I will briefly summarize the content from chapter 13 and 14 of C # Getting Started classic. Delegation is a typeYou can store references as function types.Is actually

I have been engaged in B/S-based Web development since my official work. I have not studied C/S for a long time, but I was entrusted by my friends, this is a small function for him to take photos. In fact, there are a lot of similar code on the

Data structures and algorithms (C # implementation) series-demonstration (II) Heavenkiller (original) Public static void ShowGeneralTree_travel () { IEnumerator tmpIEnum; Tree. TraversalType travelType = 0;   // --------------------- Prompt ---------

Data structures and algorithms (C # implementation) series --- tree (1) Heavenkiller (original) First, let's define the tree: A tree is a finite, non-empty node set, T = {r} or T1 or T2 or... Or Tn It has the following properties: 1. the node r

  C # unveiling II (What are the Masters talking about ?) First declare that this article is a collection type and recommended to those who like dotNET technology.Previously, I reproduced an interview with C # From OReilly. OReilly has always been

1. 4. Predefined types) C # provides a series of predefined types. They are quite similar to c/c ++. Predefined reference types include object and string. The object type is the basis of all other types. Predefined types include the number of

Use the design mode to solidify your C # Program (5-1) Design Patterns: Solidify Your C # Application Architecture with Design Patterns Chinese edition (Part 1)Author: Samir BajajTranslator: glory [Translation: C # advanced article. The translator

Use the design mode to solidify your C # Program (6-1) Design Patterns: Solidify Your C # Application Architecture with Design Patterns Chinese edition (Part 2)Author: Samir BajajTranslator: glory [Translation: C # advanced article. The translator

Use the design mode to solidify your C # Program (6-2) Design Patterns: Solidify Your C # Application Architecture with Design Patterns Chinese edition (Part 2)Author: Samir BajajTranslator: glory State. h# Include "stdafx. h ";Class State;Class

In. net, but the support for Chinese speech has not yet been added, we want to achieve Chinese pronunciation or Chinese speech recognition, you must first install Microsoft's Speech Application SDK (SASDK). The latest version is SAPI 5.1, which can

I learned the Exception Handling Mechanism of C # today. I will summarize it as follows: I. keywords used for exception handling in C # Try is used to check for exceptions and help send any possible exceptions. Catch handles errors in a way with

1. DateTime numeric typeSystem. DateTime currentTime = new System. DateTime ();1.1 take the current year, month, day, hour, minute, secondCurrentTime = System. DateTime. Now;1.2 get current yearInt Year = currentTime. Year;1.3 take the current

ReadExcelFiles // Read the source code of the file;Using System;Using System. Collections. Generic;Using System. Text;Using System. Data. OleDb;Using System. Data; Namespace CC{Public class ReadExcel{Private string FileName;Private string FilsPath;//

Example 1: convert a string to a variable name String str = "spp ";Public string spp = "very good ";Private void button#click (object sender, EventArgs e){MessageBox. Show (this. GetType (). GetField (str). GetValue (this). ToString ());   } From:

I have been engaged in B/S development for a long time. I seldom do C/S development and use fewer threads. Recently, some small software used in some work has finally used threads, record some experiences.Scenario:1: assume there is a Form F with a

ArrayList and Vector use arrays to store data. The number of elements in the array is greater than that in the actual storage to add and insert elements. Both allow direct serial number index elements, however, data insertion is designed to move

 Input a select statement for the SqlDataAdapter class, add the result to the DataSet result set in the form of rows through the Fill method, and then present the result to the user in the form of scroll below. The main program code is as follows.

// KeyPress eventPrivate void txtAge_KeyPress (object sender, KeyPressEventArgs e){// 48-57 is ASCII code 0-9, and 8 is the return keyIf (e. KeyChar 57) & e. KeyChar! = 8){E. Handled = true;}} ASCII (US Information Exchange Standard Code) Table

With the rapid development of traditional databases, computer networks, and digital communication technologies, the research and development of distributed database systems featuring data distributed storage and distribution processing have

Today, when you assign the datetime type data in the database to the DateTime type variable in C #, a problem occurs, that is, the datetime data in the database has a null value. C # by default, null cannot be assigned to the DateTime variable, but