.Net Core

At the same time as starting your own system, you always want to make the system more flexible, so that others can be easily involved. This requires a complete plug-in system, today, I am going to write an article in the plug-in framework series,

This problem occurs when the table is deleted in cascade mode. An error occurs when a primary key information is deleted. Because there are foreign key information, a trigger is used to delete all the information.  create trigger trigCategoryDelete (

  Recently, I used the Excel export function in the MVC project. I found some materials on the Internet and wrote a general generic class (ExcelResult ). Because it is directly inherited from the ActionResult abstract class, it is very convenient to

This period of time has been busy with projects, consisting of several layers of DAL + WCF + WinForm. MySQL + MySQL. Data. dll Driver used by the database. However, the following errors are often encountered during use:An error occurred while

  Differences between Application objects and Session objects The Application object is multi-session, multi-page The Session object is a single Session, multi-page The value stored in the Session object can be accessed throughout the user

  The previous sections introduce some basic features of the rest wcf Service. This section describes how to use the rest wcf Service Based on HTTP standard actions. The architectural style of RESTful services is based on the HTTP protocol, and its

  Demo of small value type and reference type   When we use a reference type, we are actually processing the type pointer, not the type itself. When we use the value type, we are using the value type itself. Sounds confused, right? The example is

  A small test project was created based on the PetShop architecture. reflection was used in the factory class. After the project was successfully generated, the website was run. when the project was run to the factory class, the system always

  ASP. NET provides three main methods for capturing and responding to errors when an error occurs: Page_Error event, Application_Error event, and application configuration file (Web. config ).   If you do not call Server. ClearError or capture an

  Currently, our Store Manager can be accessed by anyone. Let's restrict access to site management.Add AccountController and corresponding View In the full-featured ASP. NET MVC3 Wb application and empty ASP. the difference between the NET MVC3

Public partial class _ Default: System. Web. UI. Page { Protected string title = "Hello everyone"; // front-end Code Protected void Page_Load (object sender, EventArgs e) { DataSet ds = new DataSet (); String SQL = ConfigurationManager.

  When I recently used. net to develop an application, I reported "no such table error" when I connected to the sqlite database "!   It is observed that the application cannot find the sqlite database. Because my database address uses a relative

    Using System; Using System. Collections. Generic; Using System. Text; Using MyHRAdmin. Model; Using System. Data; Using System. Data. SqlClient; Namespace MyHRAdmin. DAL { Public class DBHelper { Private static SqlConnection connection;   Public

Using System;Using System. Collections. Generic;Using System. ComponentModel;Using System. Data;Using System. Drawing;Using System. Linq;Using System. Text;Using System. Windows. Forms;Using System. IO;Using System. Net;Using System.

1. Basic Graphics of WPF include the following (they are derived classes of the Shape class ): (1) Line: Line segment, which can be set to Stroke ); (2) Rectangle: a Rectangle with both strokes and fills ); (3) Ellipse: an elliptic with the same

  Continue with the memory fragments of ADO. NET (2 ).   DataAdapter class Data transmission is performed between data sources and DataSet. After commands are issued through the Command object, the obtained data can be placed into the DataSet object.

  Scenario Many websites require people to register before accessing the content or making comments. How can a website such as Niu Mao make people remember every website they have registered. During the registration process, you can send an email to

  When trying to deploy the MVC3 project on mono (2.10), we found two problems: one is that the entities from ModelBinder in all MVC3 actions are null, and the other is Lucene. net encountered the "UNC paths shocould be of the form \ server \ share"

    After writing so many articles, I believe that readers should have a certain understanding of dynamic controls. The following describes the forms commonly used by enterprises by dynamically generating controls. At present, the use of dynamic

  This article continues with the previous articles about the WCF development framework, and introduces some experience and knowledge about WCF. It mainly introduces the problems encountered during the use of WCF development and the solutions, mark