DashboardConfigurator.SetEFContextProvider(IEFContextProvider) Method
Configures the service that creates an EF Core context object within DashboardConfigurator
.
Namespace: DevExpress.DashboardWeb
Assembly: DevExpress.Dashboard.v24.1.Web.dll
NuGet Package: DevExpress.Web.Dashboard.Common
Declaration
Parameters
Name | Type | Description |
---|---|---|
efContextProvider | IEFContextProvider |
Remarks
You can resolve the appropriate Entity Framework Core context from the ASP.NET Core dependency injection container for dashboards bound to DashboardEFDataSource.
For this, implement a custom service that creates a EF Core context object for the specified data source. Register this service in IServiceCollection
to obtain the EF Core context from the DI container.
Example: Dashboard for ASP.NET Core - Resolve the Entity Framework Core Context from the DI Container
Implement the IEFContextProvider
interface (the CustomEFContextProvider
class in this example) to create a service that allows you to get the EF Core Context.
Call the IEFContextProvider.GetContext(String, Type) method to return the context for the specified data source.
using DevExpress.Data.Entity;
using Microsoft.EntityFrameworkCore;
using System;
namespace WebEFCoreApp {
public class CustomEFContextProvider : IEFContextProvider, IDisposable {
IServiceScope scope;
public CustomEFContextProvider(IServiceProvider provider) {
this.scope = provider.CreateScope();
}
public object GetContext(string connectionName, Type contextType) {
// Returns the context for the specified `EFDataSource.ConnectionName`.
if (connectionName == "EF Data Connection") {
return scope.ServiceProvider.GetRequiredService(contextType);
}
return null;
}
public void Dispose() {
scope.Dispose();
}
}
}
Call the AddDbContext method to register the context in the dependency injection container and specify the connection string in the WebApplicationBuilder
class.
using Microsoft.EntityFrameworkCore;
using DevExpress.DashboardWeb;
using DevExpress.AspNetCore;
using System;
var builder = WebApplication.CreateBuilder(args);
// ...
builder.Services.AddDbContext<OrdersContext>(options => options.UseSqlite("Data Source=file:Data/nwind.db"), ServiceLifetime.Transient);
var app = builder.Build();
// ...
In the WebApplicationBuilder
class, register the DashboardConfigurator service and configure it using the SetEFContextProvider(IEFContextProvider)
method.
using Microsoft.EntityFrameworkCore;
using DevExpress.DashboardWeb;
using DevExpress.AspNetCore;
using System;
// ...
builder.Services.AddScoped<DashboardConfigurator>((IServiceProvider serviceProvider) => {
DashboardConfigurator configurator = new DashboardConfigurator();
configurator.SetEFContextProvider(new CustomEFContextProvider(serviceProvider));
// ...
return configurator;
});