C#

0. CatalogueC#6 new features Directory1. Using await in catch and finally blocksA pair of keyword Await/async was introduced in c#5 to support the new asynchronous programming model, making the C # asynchronous programming model further simplified

A few of the DataColumn classes require the constructor of the type parameter as follows: Summary: Initializes a new instance of the System.Data.DataColumn class with the specified column name and data type. Parameters://ColumnName://A

This example uses two rectangles A and B to demonstrate the functionality of each method of the System.Drawing.Region class. Draw two rectangles Gets the portion of the destination rectangle that does not intersect this region Gets the

adds or removes an application-defined handlerroutine function from the calling process's handler list. Win32 APIFunction:Adds or removes an application-defined handlerroutine function from the calling process's handler list.Function

When you use C # to access the Access database, you are prompted to find an installable ISAM, such as: The code is as follows: connectionString = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source=db.mdb; PWD=ABCD; "; conn = new

Detailed description of the workaround for C # that the row already belongs to another table The code that generated the error: DataTable dtcontract_src = oper.getdatatable ("select * from T_contract where projectid=" + Projectid_src + "and flag=0",

A recent need to do a project, in order to avoid the trouble of choosing from the menu, need to integrate several forms together, through the TabControl tab to switch, so that the implementation of the design is to some extent the implementation of

When debugging and publishing a program, it is often necessary to save some information output, here write a own log record class, record information more convenient. You can also do more extensions if you need to, such as logging exception

take you to the C#7 feature code example: Tuple value types . NET provides a tuple (tuple) type, but there are a variety of problems when used specifically in C #. Because a tuple type is a reference type, in some code that is fairly sensitive to

on the code examples of C # Hashtable and dictionary: Dictionary () Hashtable () First, the stored data type Hashtable is not generic, is not type-safe, dictionary is generic, and is type-safe; The key values of the Hashtable are of type object,

Detailed description. NET Technical Department Overview (figure): Problem Have you ever thought about: . What technologies does net contain? The subset of technologies that I have mastered, what is the proportion of this superset of. NET

The previous article about some of the basic knowledge of DataList, mastering these knowledge in the future application plays a big role, and now we begin to talk about the basic knowledge of the previous article to do a small example. First of

The previous study of HTML static Web programming, understand some of the syntax, but I feel that the Web programming mastery is not enough, so follow the plan, began the journey of ASP. Before I write this ASP, I would like to first compare the

C # binary byte stream lookup function indexof ///Report specified system.byte[] The index of the first occurrence in this instance. // performed find system.byte[]. // system.byte[to find]. /// If the byte array is found, the index

C # binary byte array operation function intercepts byte array subbyte //Intercept byte array///// byte array to intercept // Index of Start intercept // To intercept Byte length //// truncated byte array public byte[] Subbyte (byte[]

C # Modify the permissions for a file or folder, and introduce specific code that adds full control permissions for the specified user and user group //Add the Full Control permission for the "everyone,users" user group to the Excel file FileInfo

This keyword, javathis keyword This is a reserved word and is only used by constructors and method members;In the constructor of a class, it indicates reference to the object itself being constructed, and in the class method, it indicates reference

[C #6] 8-exception enhancement,0. Directory C #6 Add feature catalog1. Use await in catch and finally Blocks Introduce a pair of keywords await/async in C #5 to support the new asynchronous programming model, the asynchronous programming model of C #

Also, Socket and Socket There are a large number of socket-related articles on the Internet, many of which are unclear. Recently, I sorted out socket-related knowledge and added a lotCode commentFirst look at the effect.                            

C # Study Notes-inherit basic knowledge, 1 namespace Inheritance 2 { 3 class Program 4 { 5 static void Main(string[] args) 6 { 7 Dog dog = new Dog(); 8 dog.Age = 10; 9 dog.Bite();10