文本框对象参考

问题描述

如何在 form1.cs 文件中的另一个自定义类中引用 TextBox 对象(比如 textBox1)?

How can I reference a TextBox object(say textBox1) in another custom class in form1.cs file?

在myclass 中，我写了textBox1，但是intelliSense 没有向我推荐它.将私有更改为公共并不能解决问题.

In myclass, I've written textBox1, but intelliSense didn't suggest it to me. Changing private to public doesn't solve it.

这里是form1.cs的示例代码

Here is the sample code of form1.cs

namespace Calculator {
    public partial class Form1: Form {
        public Form1() {
            // InitializeComponent(); 
        }

        class myclass {
            // What can I do to make texbox1 show up in intelliSense here? 
            // textBox1
        }

        public System.Windows.Forms.TextBox textBox1;
    }
}

推荐答案

如果你想在 myClass 的范围内直接引用它，那么将它声明为静态的.

If you want to reference it directly in the scope of myClass, then declare it as static.

或者你需要一个 Form1 的实例，但是这不允许你在类定义范围内声明对它的引用，你需要实例化 Form1 的实例code> 在构造函数(或类型初始值设定项)中，您可以将其分配给 myClass 的成员.

Or you would need an instance of Form1, but that won't allow you declare a reference to it in the class definition scope, you need to instantiate the instance of Form1 in constructor(or type initializer) that you can assign it to the member of myClass.

namespace Calculator {
    public partial class Form1: Form {
        public Form1() {
            InitializeComponent(); 
        }

        class myclass {
            TextBox textBox3=Form1.textBox1;
            TextBox textBox4;
            Form1 form1;

            public myclass() {
                form1=new Form1();
                textBox4=form1.textBox2;
            }
        }

        static public System.Windows.Forms.TextBox textBox1;
        public System.Windows.Forms.TextBox textBox2;
    }
}

<小时>

更新:

关于Form1的当前实例，下面是在实例化myclass时传递当前实例的多种方式之一

namespace Calculator {
    public partial class Form1: Form {
        public Form1() {
            InitializeComponent();

            textBox1=textBox2; // demonstration for "static make sense"

            var x=new Form1.myclass {
                form1=this
            };

            // now x.textBox3 is reference to textBox2
        }

        public class myclass {
            TextBox textBox3=Form1.textBox1;
            TextBox textBox4;
            internal Form1 form1;

            public myclass() {
                // form1=new Form1();
                textBox4=form1.textBox2;
            }
        }

        static public System.Windows.Forms.TextBox textBox1;
        public System.Windows.Forms.TextBox textBox2;
    }
}