C # form connection to SQL database

Create Databasedata1220--Create a databaseGo --go represents the following statement, which is based on the previous statement execution. Usedata1220--Determining Operational Database ObjectsGoCreate TableUsers--Add a

C # Implementation of query program run threads

1 class Program2 {3 Static voidMain (string[] args)4 {5list list =NewList();6 for(inti =0; I $; i++)7 {8Thread T =NewThread (testthread);9 T.start ();Ten list. ADD (t); One } AThread t3

C # thread deadlock

Using System;Using System.Collections.Generic;Using System.Linq;Using System.Text;Using System.Threading.Tasks;Using System.Threading;namespace Threading Process Learning{Class Program{static void Main (string[] args){var one = new Object ();var =

C # Compare dynamic and dictionary performance

The title may not be accurate.It is necessary to pass the arguments in development, considering whether to use dynamic or Dictionary (accurately dictionary).Dynamic's coding experience is significantly better than Dictionary, and I choose to use

C # Interface Message box

MessageBox.Show ()//heavy-dutyRequired: Using system.windows.froms;//can be found in the project right-click Add Reference-netMessageBox.Show ("Hello ...",//Text"NewDay",//titlemessageboxbuttons.okcancel,//button (also ignore, retry ...)

C # Stack

Stacks are stacks, because heaps and stacks are too clumsy to say, like tongue twisters, so there are times when stacks are abbreviated as stacks. Heap and Stack, you see how comfortable this is.But whenever the stack is not equal to heaps and

C # Object-oriented programming

Specification: 1. Do not place multiple classes in a source code file. 2. Name the source code file with the names of the public types that are included. Property: The key feature of a property is that it provides an

Methods in C # show. and ShowDialog Use difference

Show () is a non-modal form.ShowDialog () is a modal form.If this time with show, then the thing that happens is that when the subform is opened, the main form is displayed, and when you use ShowDialog (), the main form is displayed when the subform

C # Timeout Tool Class second edition

Attached source, no test demo /// ///Timeout Tool/// Public classTimeouttools {PrivateTimer timer; /// ///whether the event is executing/// Private BOOLeventrunning {Get;Set; } /// ///location/// Private

BZOJ-3531-travel

BZOJ-3531-travel When I got this question, I found that the religion that can change the faith, that is, the path that can be changed, thought it was a question of a dynamic tree (not a dynamic tree), and later I found that the tree chains

HDU2120Ice_cream & amp; #39; s world I (basic and query set)

HDU2120Ice_cream & #39; s world I (basic and query set)Ice_cream's world ITime Limit: 3000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission (s): 698 Accepted Submission (s): 398Problem Descriptionice_cream's world is a

LeetCode Combination Sum

LeetCode Combination Sum Given a set of candidate numbers (C) and a target number (T), find all unique combinations in C where the candidate numbers sums to T. The same repeated number may be chosen from C unlimited number of times. Note: All

Effectively load Large-size Bitmaps (Loading Large Bitmaps Efficiently)

Effectively load Large-size Bitmaps (Loading Large Bitmaps Efficiently) Effectively load Large-size Bitmaps (Loading Large Bitmaps Efficiently) The image has different shapes and sizes. In most cases, their actual size is much larger than what needs

POJ 1269 Intersecting Lines

POJ 1269 Intersecting Lines This question is to judge the relationship between straight lines. My idea is to first determine whether the two lines are in the same line, and then determine whether the two lines are in parallel. The rest of them must

POJ 1410 Intersection

POJ 1410 Intersection I use the most primitive method of thinking, and pay attention to many details. The main idea is to compare the four sides with the line segments. Line segments should be considered in the rectangle. My code is a bit messy and

Bzoj 1023 cactus chart

Bzoj 1023 cactus chartDescription calculate the diameter of a cactus image Solution the cactus image has a personality quality, one side is either cut side or in the ring, then we can conduct it Dp spicy! Ling F [u] indicates the longest chain

HDU 1873 is waiting for medical treatment

HDU 1873 is waiting for medical treatmentToo many Problem Description to queue for medical treatment. This is common knowledge of everyone on Earth.However, after careful observation of 0068, he found that there are still some exquisite queues in

Implementation of the shortest Bellman-Ford HDU2544

Implementation of the shortest Bellman-Ford HDU2544Problem Description In each year's competition, all the finalists will get a very beautiful t-shirt. However, every time our staff moved hundreds of pieces of clothing from the store back to the

Friends functions and friends classes of C ++

Friends functions and friends classes of C ++ When introducing classes and objects, we have already said that classes are encapsulated. Private Members in a class can be accessed only through the member functions in the class, other functions in the

HDU 3974 line segment tree (map the tree to the interval)

HDU 3974 line segment tree (map the tree to the interval) The first write will map the tree to the line segment tree of the interval... The line segment tree is simple. The original relationship tree is numbered based on the BOSS relationship. In

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