受保护的成员用户可见 [英] Protected member visible for user

问题描述

这将是我的第一个问题在这里，所以请手下留情。

It will be my first question here so please be lenient.

这怎么可能：

//there is a Form1 class which has a TableAdapter member generated by designer...
partial class Form1
{
    private void InitializeComponent()
    {
         this.SomeTableTableAdapter = new SomeDatabaseDataSetTableAdapters.SomeTableTableAdapter();
    }

    private SomeDatabaseDataSetTableAdapters.SomeTableTableAdapter SomeTableTableAdapter;
 }

//here is this TableAdapter class
//It has PROTECTED member called "Adapter"
public partial class SomeTableTableAdapter : global::System.ComponentModel.Component
{
    protected internal global::System.Data.SqlClient.SqlDataAdapter Adapter
    {
    }
}

//and in the constructor of Form1 class I can do something like this:
public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
        this.SomeTableTableAdapter.Adapter.InsertCommand.CommandText = @"INSERT INTO (...)";
    }
}

我怎么可以访问受保护的成员，因为Form1中不会从SomeTableTableAdapter继承？

How come I get access to protected member since Form1 do not inherit from SomeTableTableAdapter?

推荐答案

在适配器属性被声明为受保护的内部，这意味着它可以访问派生类（保护）和以班级在同一组件（内部）。由于 Form1中在同一个组件， SomeTableTableAdapter ，他们可以访问对方的内部成员。

The Adapter property is declared as protected internal, which means it is accessible to derived classes (protected) and to classes in the same assembly (internal). Since Form1 is in the same assembly as SomeTableTableAdapter, they can access each other's internal members.

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