.Net Core

SQL query, =, IN, OR, index, sqlor SELECT c FROM t WHERE c = 1 SELECT c FROM t WHERE c in (1) Or SELECT c FROM t WHERE c = 1 OR c = 2 SELECT c FROM t WHERE c in (1, 2) IN the preceding SQL statements, the first (=, IN) and the second (=, OR, IN) use

Asp.net Callback technology callback learning notes and Callback learning notes . Aspx: No title page name: [/code]. aspx. cs [code] using System; using System. collections; using System. configuration; using System. data; using

AnimateWindows for MFC, mfcanimatewindowsAnimateWindow This function can have special effects when displaying and hiding windows. There are two types of animation effects: Scroll animation and slide animation.Function prototype: BOOL AnimateWindow

Prism 5.0 source code for reading Bootstrapper and bootstrapper The Prism framework needs to initialize the application when it starts. the Bootstrapper is used as the starting point. Bootstrapper mainly involves creating and configuring module

To solve the performance problem of EF hierarchical query, ef hierarchical Query In the past two years, I helped my friend develop an Internet cafe management software, which was generated using a dynamic, soft, three-tier architecture SQL statement.

ASP. NET controller and action method, asp.net controller action 1. What kind of class can become a controller? In ASP. net mvc, classes that directly or indirectly implement the IController interface are considered as controllers by the Mvc

Asp.net how to convert DataSet to josn and output the datasetjosn public class JsonUtil { public string ToJson(DataSet dataSet) { string jsonString = "{"; foreach (DataTable table in dataSet.Tables) { jsonString += """" + table.TableName + """:" +

[WinForm] sets the watermark text for TextBox, winformtextbox Key code: Using System; using System. runtime. interopServices; using System. windows. forms; namespace WinFormUtilHelpV2 {/// /// based on. NET 2.0 TextBox tool class // public static

Concepts required to understand the essence of a set 04-Binary Search Tree, 04-Binary Search Tree Unlike linked lists, stacks, and queues, the binary search tree is not a linear data structure, but a two-dimensional data structure. Each node

Use the encrypted database connection string and asp.net string in asp.net When we publish a website, encrypt web. config to effectively ensure the security of database users and passwords. The steps are as follows:1. Add a keyRun: C: \ WINDOWS \

1. Server. Transfer and Response. Redirect, response. redirect Today, when using ServerTransfer and Response. Redirect to locate the current page to refresh the page, we found some phenomena: 1. Use Response. Redirect to refresh the page, causing

Code First, Database First, Same Time difference, databasesame   Code First, Database First, and Same Time are the three models used in asp.net mvc that I understand to correspond to databases. They must be incomplete and narrow in understanding, in

[Reprinting] HTTP Error 500.19, reprinting 500.19 The following error occurs when ASP. NET is installed on IIS7 in windows 2008: HTTPError500.19-Internal Server Error The requested page cannot be accessed because the configuration data of the page

How to identify the visitor's country and the visitor's country During website construction, visitors in different countries may need to display different information. In particular, the international requirements for the language used by websites,

ASP. NET -- create a verification code We often encounter a verification code entry when logging on to the website, posting a blog or submitting a comment. At that time, we finally got in touch with niu Yi's news publishing system, here is a summary.

A stored procedure, several results, how to display, stored procedure, and display Some netizens on the Forum asked:"The stored procedure of the Three-table join query has three tables. How can I use the GridView to display the results? "No

Methods for clearing SQL logs using ASP. NET -- It is best to back up logs to restore data in the future... The following describes how to process logs: Generally, steps 4 and 6 are not recommended. Step 3 is not safe, and may damage the database or

Mvc learning Summary-using Ninject, CodeFirst, ninjectcodefirst 1. ninject is used to decouple the program, that is, programming the interface, rather than programming the implementation class; Understanding: BLL programming the IDAL, corresponding

Re-register the. NET Framework 2.0 command and Parameter Details on IIS,. netframework We may sometimes need to re-register. Net to IIS. You can use the following command line to operate.If you have already installed IIS on your computer and then

ASP. net mvc Model verification (3)Preface in the previous article, we talked about where the default Model verification is in the MVC Framework and the internal execution of the DefaultModelBinder type, we can see the specific method in which the