[英]Using connection string from appsettings.json to startup.cs
目前在Startup中,我的sql server字符串如下所示:
public void ConfigureServices(IServiceCollection services)
{
var connection = @"Server=servername;Database=database;Trusted_Connection=True;MultipleActiveResultSets=true";
services.AddDbContext<CRAMSContext>(options => options.UseSqlServer(connection));
}
我如何使用appsettings.json中的內容:
{
"Data": {
"DefaultConnection": {
"ConnectionString": "Data Source=server;Initial Catalog=database;Trusted_Connection=True;MultipleActiveResultSets=true"
},
"Logging": {
"IncludeScopes": false,
"LogLevel": {
"Default": "Debug",
"System": "Information",
"Microsoft": "Information"
}
}
}
在新的ASP.NET 1.0 CORE新設置中看起來像這樣看起來像這樣參數化:
public void ConfigureServices(IServiceCollection services)
{
var connection2 = new SqlConnection connectionString;
services.AddDbContext<CRAMSContext>(options => options.UseSqlServer(connection2));
}
另外,如果我有一個不同的測試數據庫和qa,我如何知道ASP.NET應用程序是否為每個環境使用連接?
我的啟動類已經在根目錄中定義如下:
public Startup(IHostingEnvironment env)
{
var builder = new ConfigurationBuilder()
.SetBasePath(env.ContentRootPath)
.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
.AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true)
.AddEnvironmentVariables();
Configuration = builder.Build();
}
使用適當的連接字符串結構:
{
"ConnectionStrings": {
"DefaultConnection": "xxx"
}
}
在startup.cs中訪問:
services.AddDbContext<ApplicationDbContext>(options =>
options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));
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