DbContext 建構函式

定義

命名空間:

Microsoft.EntityFrameworkCore

組件:

Microsoft.EntityFrameworkCore.dll

套件:

Microsoft.EntityFrameworkCore v9.0.0

多載

DbContext()	初始化 DbContext 類別的新執行個體。 OnConfiguring(DbContextOptionsBuilder)系統會呼叫 方法，以設定資料庫 (和其他選項，) 用於此內容。
DbContext(DbContextOptions)	使用指定的選項， DbContext 初始化 類別的新實例。 OnConfiguring(DbContextOptionsBuilder)仍然會呼叫 方法，以允許進一步設定選項。

DbContext()

來源:

DbContext.cs

初始化 DbContext 類別的新執行個體。 OnConfiguring(DbContextOptionsBuilder)系統會呼叫 方法，以設定資料庫 (和其他選項，) 用於此內容。

[System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("EF Core isn't fully compatible with trimming, and running the application may generate unexpected runtime failures. Some specific coding pattern are usually required to make trimming work properly, see https://aka.ms/efcore-docs-trimming for more details.")]
[System.Diagnostics.CodeAnalysis.RequiresDynamicCode("EF Core isn't fully compatible with NativeAOT, and running the application may generate unexpected runtime failures.")]
protected DbContext ();

Protected Sub New ()

屬性

RequiresUnreferencedCodeAttribute RequiresDynamicCodeAttribute

備註

如需詳細資訊 和範例，請參閱 DbCoNtext 存留期、組態和初始化 。

DbContext(DbContextOptions)

來源:

DbContext.cs

使用指定的選項， DbContext 初始化 類別的新實例。 OnConfiguring(DbContextOptionsBuilder)仍然會呼叫 方法，以允許進一步設定選項。

[System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("EF Core isn't fully compatible with trimming, and running the application may generate unexpected runtime failures. Some specific coding pattern are usually required to make trimming work properly, see https://aka.ms/efcore-docs-trimming for more details.")]
[System.Diagnostics.CodeAnalysis.RequiresDynamicCode("EF Core isn't fully compatible with NativeAOT, and running the application may generate unexpected runtime failures.")]
public DbContext (Microsoft.EntityFrameworkCore.DbContextOptions options);

[<System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("EF Core isn't fully compatible with trimming, and running the application may generate unexpected runtime failures. Some specific coding pattern are usually required to make trimming work properly, see https://aka.ms/efcore-docs-trimming for more details.")>]
[<System.Diagnostics.CodeAnalysis.RequiresDynamicCode("EF Core isn't fully compatible with NativeAOT, and running the application may generate unexpected runtime failures.")>]
new Microsoft.EntityFrameworkCore.DbContext : Microsoft.EntityFrameworkCore.DbContextOptions -> Microsoft.EntityFrameworkCore.DbContext

Public Sub New (options As DbContextOptions)

參數

options

DbContextOptions

此內容的選項。

屬性

RequiresUnreferencedCodeAttribute RequiresDynamicCodeAttribute

備註

如需詳細資訊 和範例，請參閱 DbCoNtext 存留期、組態和初始化 和使用 DbCoNtextOptions 。