.Net Core

UniqueAttribute uniqueness constraint-optimized version, special optimized version I have previously written an article "Implementing UniqueAttribute uniqueness constraints". Although it achieves uniqueness verification by calling the IsValid method,

Practice Pattern Matching in C #6, Pattern Matching is a very useful language feature in F. It is estimated that many people want to use this feature in C. In one sentence, pattern matching is: creating a function can accept and process

Mvc learning notes (4) and mvc learning notesI have introduced how to pass the values in the Controller to the view, but how is it passed? What is the principle? View page. cshtml is also compiled into a class during compilation. However, this class

The array in Sliverlight linq filters data in the database. What is linq first? The Language-Integrated Query (Language-Integrated Query) is a new feature that is Integrated into C # and Visual Basic. NET to provide data Query capabilities. It is an

WebAPI GET and POST requests: webapigetpost requests GET request 1. No parameter get request Generally, get requests can be written in either of the following ways:$. Get () is $. ajax ({type: "get "}),I personally prefer the latter. The following

Basic essentials for. NET Program Performance Optimization and. net Performance Optimization Bill Chiles (Program Manager of the Roslyn compiler) wrote an article titled "Essential Performance Facts and. NET Framework Tips, a well-known blogger Han

WPF learning 04: 2D drawing Shape, wpf042dshapeExample A removable white box: Xmlns = "http://schemas.microsoft.com/winfx/2006/xaml/presentation"Xmlns: x = "http://schemas.microsoft.com/winfx/2006/xaml" Background = "# 019aff"Title = "Shape" Height =

Step on a token: use the default parameter with caution, and use the parameter with caution. I always thought. net compiler will compile the default parameters into the reload mode for the main DLL call, until recently want to extend a method does

ASP. NET implements JS-SDK permission signature algorithm, asp. netjs-sdk The signature generation rules are as follows: The fields involved in the signature include noncestr (random string), valid jsapi_ticket, timestamp (timestamp), and url (the

Cainiao notes-multi-dimensional array and multi-dimensional array of notes 1. Two-dimensional array Equivalent to a table, Syntax: int [,] arr = new int [2, 3]; The access element is similar to accessing a cell, subscript [I, j]: [row,

C # Summary of several methods for intercepting strings (excerpt ), 1. Use split to intercept a single Separator For exampleString st = "GT123_1 ";   String [] sArray = st. split ("_"); You can get sArray [0] = "GT123", sArray [1] = "1 ";   2. Use

WinForm inheritance, winform In a Windows application, when you inherit from an existing form and view the design view of the child form, an error occurs: The System. Windows. Forms. Design. IEventHandlerService already exists in the service

[MVC] basics and mvc Basics 1: The master page is placed in View/Shared, and all View pages can use the master page. ** The application of the motherboard needs to use nesting, @ RenderBody (); to display all the content of other webpages here, it

Asp.net checks whether the file selected by FileUpload is an image, If the keleyi. aspx page contains a FileUpload control with the ID of fuHovertree, how does the C # Code determine whether the file selected by fuHovertree is an image?The Code is

When Razor uses Parse (), it is best to specify the "cache name", razorparseWhy? The title of this article clearly has a reminder. From 18 years of life experience, if you want to remind people what to do, don't do it. It is best to explain the

Windows window auto scaling and Window Scaling The automatic scaling function enables the Interface Designed on one computer to be properly displayed on another computer with different resolutions or system fonts. In this way, the form and its

Version Control for serialization and deserialization, serialization and deserialization of collection objects, and serialization of Sets When cross-process or even cross-domain data transmission is involved, we need to serialize and deserialize the

Notes for learning from linq into linear programming I have recently learned some basic knowledge about linq, read c # advanced programming, and read several excellent blog posts in the garden. I have some experience and I feel that I should record

[Original] Entity Framework query principle, entityframeworkPreface The full name of Entity Framework is ADO. NET Entity Framework, which is an ORM (Object/Relational Mapping) Framework developed by Microsoft Based on ADO. NET.Main features of

[Original] basic Extension Method usage, original extension method usagePreface First, let's take a look at the description above msdn: the extension method enables you to "add" methods to existing types without creating new derived types,