然后,通过在内存数据库上调用 inMemoryDb.Database.CreateIfNotExists() 方法来创建数据库(如果不存在的话)。 代码语言:txt 复制 inMemoryDb.Database.CreateIfNotExists(); 现在,你可以使用内存数据库来执行增删改查操作了。例如,添加一个实体并保存更改: 代码语言:txt 复制 var entity = new MyEntity ...
string DbConnectStringSqlServer = "(localdb)\\mssqllocaldb;Database=DynamicContext;Trusted_Connection=True;"; DbConnectStringSqlServer = "server=127.0.0.1;database=DynamicContext;user=zy;password=zy;"; DbConnectStringSqlServer = "server=127.0.0.1;database=DynamicContext;user=sa;password=sa123;"; ...
{publicDateTime CreateDateTime {get;set; }//为了区分不同的表publicDbSet<Test> Tests {get;set; }//sqlserver连接字符串 Server=(localdb)\\mssqllocaldb;Database=DynamicContext;Trusted_Connection=True;//sqlserver连接字符串 server=127.0.0.1;database=DynamicContext;user=zy;password=zy;//oracle连接字...
{ [DependsOn(typeof(AbpZeroEntityFrameworkModule),typeof(reportCoreModule))]publicclassreportDataModule : AbpModule {publicoverridevoidPreInitialize() { Database.SetInitializer(newCreateDatabaseIfNotExists<reportDbContext>()); Configuration.DefaultNameOrConnectionString="Default"; }publicoverridevoidInitiali...
optionsBuilder.UseMySQL("Server=47.94.174.85;Database=testDb; User=testDb;Password=testDb;");//的你要安装<strong>MySql.Data.EntityFrameworkCore 这个UserMYSQL中MYSQL是大写的</strong> 三、在控制器里面写查询操作 1 2 3 4 DataContext context =newDataContext(); ...
Database.SetInitializer(newCreateDatabaseOnlyIfNotExists<ProductDbContext>()); //Recreates the DB if the model changes but doesn't insert seed data. Database.SetInitializer(newRecreateDatabaseIfModelChanges<ProductDbContext>()); //Always recreates the DB every time the app is run. ...
Provides a simple API surface for configuring DbContextOptions<TContext>. Databases (and other extensions) typically define extension methods on this object that allow you to configure the database connection (and other options) to be used for a co
Create the project To begin, we are going to create a new ABP Framework project via the command line. Since we are going to use the SQL instance as our default database, we will specify that in the command line: abp new MultipleDbContextDemo -t app -u mvc --mobile none --database...
Tread carefully when using this as it can create tricky issues and quickly lead to a maintenance nightmare.Sometimes, a service method may need to persist its changes to the underlying database regardless of the outcome of overall business transaction it may be part of. This would be the case...
InvalidOperationException: No database provider has been configured for this DbContext. A provider can be configured by overriding the DbContext.OnConfiguring method or by using AddDbContext on the application service provider. If AddDbContext is used, then also ensure that your DbContext type ...