C#

Private CollectionViewSource wgdData = new CollectionViewSource (); Private DataTable Ds_wgd{Get {return this. dgv_wgd.ItemsSource as DataTable ;}Set{WgdData. Source = value;This. dgv_wgd.ItemsSource = (DataTable) wgdData. Source). DefaultView;}} /

Set the closed form to form 1 and refresh form to Form 2, 1. The binding method in Form 2 is set to public, and the instance is obtained in single-instance mode (in this way, the instance is the same anywhere ). 2. register an event on Form 1 to

Abstract class C # the class and method can be declared as abstract, that is, abstract classes and abstract methods. Abstract Classes usually represent an abstract concept, which provides a starting point for inheritance. When designing a new

This is an operation prompt animation. A small hand moves back and forth on the screen according to an arc shape. --> -->  

. Net Component Programming thread and concurrency Management (2) 2. Synchronization thread Manual synchronization Monitor Mutual Exclusion Event waiting   Synchronization thread All. the. NET component supports running in a

In. NET3.0, Microsoft released a Lambda expression. This makes the expression of the Code more elegant. However, most of the new things will be rejected by instinct. Although version 3.0 has been launched for a long time, I have learned from people

C # It is easy and convenient to interact with the background by having its own background controls. However, sometimes html controls have to be used. how to interact with the background is a problem. For example, html obtains background parameters

A new project, such as packexe, uses the external file f.exe as the embedded resource, Add code: Using System. reflection; // ++ using System. IO; namespace packEXE {// // MainWindow. interaction logic of xaml // public partial class MainWindow:

1. Bubble SortingBubble Sorting is the slowest sorting algorithm. In practice, it is the most efficient algorithm. It compares every element in the array one by one, causing large data to sink and small data to rise. It is an O (n ^ 2) algorithm.2.

. Net Component Programming context In the subsequent articles on remote calls, we have mentioned the application domain, which is the logic of a Large-granularity control assembly. Who will take the lead in controlling objects?That's right. It's

Sqlite cannot directly create user-defined functions, and cannot be easily created and used as in SQL server. But we can still create it. After the creation is successful, we can still do what we like (such as batch update) Sequence is a common

Memo: 1. The C function parameter is a string char *. If it is an input parameter, it corresponds to string or StringBuilder in C #; if it is an output parameter, it corresponds to StringBuider in C;   2. The C function parameter is a struct pointer,

Use SqlBulkCopy to import data to an Excel database Because the recent project requires a large amount of data to be imported from Excel to the SQL Server database, the data volume is very large, and the SQL bulkcopy is used for data

 DoNet Resources As we all know ,.. Net memory management is divided into Managed resources and unmanaged resources. The objects in the memory are divided according to these two types of resources, and then the GC is responsible for recycling

I recently worked very leisurely. When I was free, I went out to play with my sister. I watched novels, watched movies, and had a good time. I regret it this week. The code is my favorite, write an email sending program when you do something small.

C # The Sqlite help class has recently used WPF as a client and requires offline operations to store data. In the project, considering using Sqlite embedded databases, I found a lot of information on the Internet, finally, a public help class is

Collect from the network to make it easy for others 1 # region hide the System scroll bar 2 protected override void WndProc (ref System. windows. forms. message m) 3 {4 ShowScrollBar (this. handle, 3, false); // 0: horizontal, 1: vertical, 3: both 5

Generally, we need more functions by expanding a parent node and expanding all child nodes (I .e., linkage) at the same time ), but sometimes we also need to expand all the parent nodes on a node until the current node, for example, when deleting a

In the previous articles, we gradually transitioned from the original API encapsulation to the application platform management system, and gradually introduced the data interface design in the management system, and related processing logic and code.

Preface This article has been updated to http://www.cnblogs.com/aehyok/p/3624579.html. This article mainly records the following content: 38. Be careful with the traps in the closure. Suggestion 39. Understand the essence of delegation Suggestion 40.