add database to asp net project

-contexttypename mvcmovie. Models. moviedbcontext2. Create the initial state: Add-migration initial3. automatically compare the differences to generate a migration class: Add-migration addratingmig4. migrate the application to the database: Update-DatabaseIn the actual project development or maintenance process, due to

Label:Catalog Index　 "Selfless sharing: ASP. NET CORE Project Combat" Catalog Index Introduction In this chapter we introduce the following ASP. NET Core using Codefirst to create databases and tables to modify the EF context object,

article, if not first put, have the opportunity to solve, and then update. Let's introduce today, just like Microsoft's Demo, context and migrations are all used under SRC\WKMVC (web): We open the folder where we want to add migrations (SRC\WKMVC), select this folder, Shift right-click, choose here to open Command Window (W) Input dotnet EF--help 　　 Here, the documentation is clear and we need to take a few steps: ① adding Microsoft.EntityFramework

directly download the SQL Server 2000 Northwind database and installation script from the Microsoft website. After the database is installed, go to the server resource manager in Visual Studio, right-click the Data Connection node, and select "Add Connection )". If you cannot see the server resource manager, go to View and click server resource manager, or press

create a lookupcodes table that returns the objects that are not materializedMyconnection.close ();}2. ExecuteScalar (): Execute SQL, (if SQL is query Select) returns the first column of the first row of the query result, if (if SQL is not a query select), returns the object not materialized because the object is not materialized, so the return result cannot be ToString (), cannot be equals (null), which means that the return result has no effect3, the ExecuteReader method executes SQL, (if SQL

Label: 1. Add a connection to the "ConnectionName" connectionstring= "server=.\sqlexpress;database=databasename; Userid=sa; Password=abc123 " Providername="System.Data.SqlClient"/> Or "ConnectionName" connectionstring= "server=.\sqlexpress; attachdbfilename=| Datadirectory|\\data.mdf; Integrated security=true "providername=" System.Data.SqlClient "/> Get the connection string in the Reference na

to add the defined values to the database. V. Layoutrenderer application according to the above operation and can not meet my current framework of the application, I need to direct the object, but directly ilog.info (T), and will not get the value, he will get to the null value. To do this, you need to customize the layoutrenderer. We can see that he is a generic method, so it is possible to insert objects

project has been built. The following is the project resource manager. After the project is created, you can see that many folders have been created by default. Here we will briefly describe the role of each folder. Content-stores some resource files, fragments, and CSS required by the application. Controllers -- stores the Controller class. Models --

Today, a colleague asked how to add a validation feature to the model when using the entity Framework's database frist or model first? Because the model at this time is how the VS tool is generated, it is too realistic and unreasonable to directly add attribute to the Modle class. A more reasonable approach is to use the buddy class approach to achieve.For exampl

(configurationmanager.connectionstrings["db2016connectionstring"]. Connectionstring.tostring ()); News Info=NewNews (); Info.content=TextBox1.Text; LqDB.news.InsertOnSubmit (info); Lqdb.submitchanges (); Page.ClientScript.RegisterStartupScript (GetType (),"","alert (' Publish Success '); Location.href= ' Default.aspx '",true); } } modifying data protected voidPage_Load (Objectsender, EventArgs e) {Linqdbdatacontext lqdb=NewLinqdbdatacontext (configurationmanager.connec

Insert (ADD) database data ):For example:Sqlcommand cmd = new sqlcommand ("insert into person values (@ PID, @ pname, @ resolve X)", con );Sqlparameter para = new sqlparameter ("@ PID", sqldbtype. varchar, 10); // describes the PID attributePara. value = P. PID; // PID value assignmentCmd. Parameters. Add (para); // Add