Question

我有一个显示狗的应用程序。

“ HelloDogs”，一个“ dog.cs”类无法看到“ form1.cs”中的文本框

有人可以阐明这一点吗？

我正在尝试使用输入到文本框中的用户定义变量来创建一条新狗

就像我试图在DogChorus中使用Dog（）构造函数一样，但它不会接受textbox.Dog（int，string，string）的参数的文本内容，并且因为在form1.cs中而无法看到它们

在form1.designer.cs里面，我什至将textBox更改为public，但这也不起作用...

显示应用程序的屏幕截图

Screenshot showing application

显示我单击“获取狗”按钮时会发生什么的屏幕截图

Screenshot showing what happens when i click 'get dogs' button

显示我单击“创建狗”按钮时会发生什么的屏幕截图

Screenshot showing what happens when i click 'create dogs' button

namespace HelloDogs

我必须向您展示4个课程； Form1.cs，Form1.Designer.cs Dog.cs和DogChorus.cs

Form1.cs：

public partial class Form1 : Form
{
    DogChorus dogs;
    DogChorus dog;

    public Form1()
    {
        InitializeComponent();
        dogs = new DogChorus();
        dog = new DogChorus();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        dogDetailsRichTextBox.AppendText(dogs.GetOutput());
    }

    private void createDogsButton_Click(object sender, EventArgs e)
    {
        Dog newDog = new Dog(Convert.ToInt32(dogHeightTextBox.Text), dogColourTextBox.Text, dogBreedTextBox.Text);
        dogDetailsRichTextBox.AppendText(dog.GetMoreOutput());
    }
}

Form1.Designer.cs：

partial class Form1
{
    /// <summary>
    /// Required designer variable.
    /// </summary>
    private System.ComponentModel.IContainer components = null;

    /// <summary>
    /// Clean up any resources being used.
    /// </summary>
    /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
    protected override void Dispose(bool disposing)
    {
        if (disposing && (components != null))
        {
            components.Dispose();
        }
        base.Dispose(disposing);
    }

    #region Windows Form Designer generated code

    /// <summary>
    /// Required method for Designer support - do not modify
    /// the contents of this method with the code editor.
    /// </summary>
    private void InitializeComponent()
    {
        this.button1 = new System.Windows.Forms.Button();
        this.dogDetailsRichTextBox = new System.Windows.Forms.RichTextBox();
        this.dogBreedTextBox = new System.Windows.Forms.TextBox();
        this.dogHeightTextBox = new System.Windows.Forms.TextBox();
        this.dogColourTextBox = new System.Windows.Forms.TextBox();
        this.dogBarkSoundTextBox = new System.Windows.Forms.TextBox();
        this.createDogsButton = new System.Windows.Forms.Button();
        this.enterBreedLabel = new System.Windows.Forms.Label();
        this.enterDogHeightLabel = new System.Windows.Forms.Label();
        this.enterDogColourLabel = new System.Windows.Forms.Label();
        this.enterBarkSoundLabel = new System.Windows.Forms.Label();
        this.SuspendLayout();
        // 
        // button1
        // 
        this.button1.Location = new System.Drawing.Point(292, 119);
        this.button1.Name = "button1";
        this.button1.Size = new System.Drawing.Size(122, 23);
        this.button1.TabIndex = 0;
        this.button1.Text = "get dogs";
        this.button1.UseVisualStyleBackColor = true;
        this.button1.Click += new System.EventHandler(this.button1_Click);
        // 
        // dogDetailsRichTextBox
        // 
        this.dogDetailsRichTextBox.Location = new System.Drawing.Point(15, 148);
        this.dogDetailsRichTextBox.Name = "dogDetailsRichTextBox";
        this.dogDetailsRichTextBox.Size = new System.Drawing.Size(399, 328);
        this.dogDetailsRichTextBox.TabIndex = 1;
        this.dogDetailsRichTextBox.Text = "";
        // 
        // dogBreedTextBox
        // 
        this.dogBreedTextBox.Location = new System.Drawing.Point(156, 12);
        this.dogBreedTextBox.Name = "dogBreedTextBox";
        this.dogBreedTextBox.Size = new System.Drawing.Size(258, 20);
        this.dogBreedTextBox.TabIndex = 2;
        // 
        // dogHeightTextBox
        // 
        this.dogHeightTextBox.Location = new System.Drawing.Point(156, 39);
        this.dogHeightTextBox.Name = "dogHeightTextBox";
        this.dogHeightTextBox.Size = new System.Drawing.Size(258, 20);
        this.dogHeightTextBox.TabIndex = 3;
        // 
        // dogColourTextBox
        // 
        this.dogColourTextBox.Location = new System.Drawing.Point(156, 66);
        this.dogColourTextBox.Name = "dogColourTextBox";
        this.dogColourTextBox.Size = new System.Drawing.Size(258, 20);
        this.dogColourTextBox.TabIndex = 4;
        // 
        // dogBarkSoundTextBox
        // 
        this.dogBarkSoundTextBox.Location = new System.Drawing.Point(156, 93);
        this.dogBarkSoundTextBox.Name = "dogBarkSoundTextBox";
        this.dogBarkSoundTextBox.Size = new System.Drawing.Size(258, 20);
        this.dogBarkSoundTextBox.TabIndex = 5;
        // 
        // createDogsButton
        // 
        this.createDogsButton.Location = new System.Drawing.Point(156, 119);
        this.createDogsButton.Name = "createDogsButton";
        this.createDogsButton.Size = new System.Drawing.Size(130, 23);
        this.createDogsButton.TabIndex = 6;
        this.createDogsButton.Text = "Create Dogs";
        this.createDogsButton.UseVisualStyleBackColor = true;
        this.createDogsButton.Click += new System.EventHandler(this.createDogsButton_Click);
        // 
        // enterBreedLabel
        // 
        this.enterBreedLabel.AutoSize = true;
        this.enterBreedLabel.Location = new System.Drawing.Point(12, 19);
        this.enterBreedLabel.Name = "enterBreedLabel";
        this.enterBreedLabel.Size = new System.Drawing.Size(116, 13);
        this.enterBreedLabel.TabIndex = 7;
        this.enterBreedLabel.Text = "Enter the breed of dog:";
        // 
        // enterDogHeightLabel
        // 
        this.enterDogHeightLabel.AutoSize = true;
        this.enterDogHeightLabel.Location = new System.Drawing.Point(12, 46);
        this.enterDogHeightLabel.Name = "enterDogHeightLabel";
        this.enterDogHeightLabel.Size = new System.Drawing.Size(118, 13);
        this.enterDogHeightLabel.TabIndex = 8;
        this.enterDogHeightLabel.Text = "Enter the height of dog:";
        // 
        // enterDogColourLabel
        // 
        this.enterDogColourLabel.AutoSize = true;
        this.enterDogColourLabel.Location = new System.Drawing.Point(12, 73);
        this.enterDogColourLabel.Name = "enterDogColourLabel";
        this.enterDogColourLabel.Size = new System.Drawing.Size(118, 13);
        this.enterDogColourLabel.TabIndex = 9;
        this.enterDogColourLabel.Text = "Enter the colour of dog:";
        // 
        // enterBarkSoundLabel
        // 
        this.enterBarkSoundLabel.AutoSize = true;
        this.enterBarkSoundLabel.Location = new System.Drawing.Point(12, 96);
        this.enterBarkSoundLabel.Name = "enterBarkSoundLabel";
        this.enterBarkSoundLabel.Size = new System.Drawing.Size(142, 13);
        this.enterBarkSoundLabel.TabIndex = 10;
        this.enterBarkSoundLabel.Text = "Enter the bark sound of dog:";
        // 
        // Form1
        // 
        this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
        this.ClientSize = new System.Drawing.Size(431, 488);
        this.Controls.Add(this.enterBarkSoundLabel);
        this.Controls.Add(this.enterDogColourLabel);
        this.Controls.Add(this.enterDogHeightLabel);
        this.Controls.Add(this.enterBreedLabel);
        this.Controls.Add(this.createDogsButton);
        this.Controls.Add(this.dogBarkSoundTextBox);
        this.Controls.Add(this.dogColourTextBox);
        this.Controls.Add(this.dogHeightTextBox);
        this.Controls.Add(this.dogBreedTextBox);
        this.Controls.Add(this.dogDetailsRichTextBox);
        this.Controls.Add(this.button1);
        this.Name = "Form1";
        this.Text = "Form1";
        this.ResumeLayout(false);
        this.PerformLayout();

    }

    #endregion

    private System.Windows.Forms.Button button1;
    private System.Windows.Forms.RichTextBox dogDetailsRichTextBox;
    public System.Windows.Forms.TextBox dogBreedTextBox;
    public System.Windows.Forms.TextBox dogHeightTextBox;
    public System.Windows.Forms.TextBox dogColourTextBox;
    public System.Windows.Forms.TextBox dogBarkSoundTextBox;
    private System.Windows.Forms.Button createDogsButton;
    private System.Windows.Forms.Label enterBreedLabel;
    private System.Windows.Forms.Label enterDogHeightLabel;
    private System.Windows.Forms.Label enterDogColourLabel;
    private System.Windows.Forms.Label enterBarkSoundLabel;
}

Dog.cs：

class Dog
{
    private string barkSound;
    private string breed;
    private int dogHeight;
    private string dogColour;
    private static int noOfLegs;

    public string Breed
    {
        get { return breed; }
        set { breed = value; }
    }

    public int DogHeight { get => dogHeight; set => dogHeight = value; }
    public string DogColour { get => dogColour; set => dogColour = value; }
    public static int NoOfLegs { get => noOfLegs; set => noOfLegs = value; }

    private string dogSpeech;

    public Dog()
    {
        barkSound = "Woof!";
        breed = "cocker spaniel";
    }

    public Dog(int dogHeight, string dogColour, string breed)
    {
        this.dogHeight = dogHeight;
        this.dogColour = dogColour;
        this.breed = breed;
    }

    private bool IsBig(int number)
    {
        if (number < 50)
        {
            return false;
        }
        else
        {
            return true;
        }
    }

    public string GetSpeech()
    {
        if (IsBig(dogHeight))
        {
            dogSpeech = "Hello. I am a " + dogColour + " " + breed + ". I am a big dog, my height is " + dogHeight + " cm. " + barkSound;
        }
        else
        {
            dogSpeech = "Hello. I am a " + dogColour + " " + breed + ". I am not a big dog, my height is " + dogHeight + " cm. " + barkSound;
        }
        return dogSpeech;
    }
    public void SetSound(String barkSound)
    {
        this.barkSound = barkSound;
    } 

}

DogChorus.cs：

class DogChorus 
{
    Dog lady;        
    Dog tramp;
    Dog chief;
    Dog bingo;
    Dog newDog;

    public DogChorus() {
        lady = new Dog();        
        tramp = new Dog();
        tramp.SetSound("Ruff!");
        chief = new Dog(55, "blue", "bulldog");
        bingo = new Dog(45, "red", "boxer");
        newDog = new Dog(0,"","");
    }

    public string GetOutput(){
        return lady.GetSpeech() + " I have " + Dog.NoOfLegs + " legs \n " + tramp.GetSpeech() + " I have " + Dog.NoOfLegs + " legs \n " + chief.GetSpeech() + " I have " + Dog.NoOfLegs + " legs \n " + bingo.GetSpeech() + " I have " + Dog.NoOfLegs + " legs \n";
    }

    public string GetMoreOutput()
    {
        return newDog.GetSpeech() + " I have " + Dog.NoOfLegs + "legs \n ";
    }
}

Answer 1

根据您提出的问题，我没有阅读您所有的代码，我认为您需要将Form1的实例（通过构造函数）传递给您的{{3} }类。
请在下面的示例中的代码内查看我的评论：

Form1：

public partial class Form1 : Form
{

    public Form1()
    {
        InitializeComponent();
    }

    // global variable of Dogs Class instance - pass it a Form1 instance
    public Dogs _Dogs;

    private void Form1_Load(object sender, EventArgs e)
    {
        // initilize Dogs class and pass this Form1 instance
        _Dogs = new Dogs(this);
    }

    private void button1_Click(object sender, EventArgs e)
    {
        // show textbox1 text from Dogs class
        _Dogs.showTextBox1Text();
        // you can also just pass the value of textbox1 to Dogs instance
        _Dogs.passedTextFromForm1(textBox1.Text);
    }
}

狗类：

public class Dogs
{
    // global variable to hold form1
    public Form1 MyForm1;
    public Dogs(Form1 form1Istance)
    {
        this.MyForm1 = form1Istance;
    }

    public void showTextBox1Text()
    {
         // do not forget to set the access modifier of TextBox1 to public (you can do it in the Designer, the propery is "Modifier")
        System.Windows.Forms.MessageBox.Show("showTextBox1Text(): " + this.MyForm1.textBox1.Text);
    }

    public void passedTextFromForm1(string txtfromtextbox1)
    {
        // another way to share data between instances
        System.Windows.Forms.MessageBox.Show("passedTextFromForm1(): " + txtfromtextbox1);
    }
}

TextBox控件的访问修饰符可以在此处更改（公开以与其他类共享）：

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