Question

我从另一个子窗体（form1）打开一个子窗体（form2），并将MDI设置为父窗体。

以下是我如何从MainForm

打开form1作为MainForm的子窗体

public partial class MainForm : Form
{
    public MainForm()
    {
        InitializeComponent();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        form1 f1 = new form1();
        f1.MdiParent = this;
        f1.Show();
    }
}

以下是form2作为MainForm的另一个子表单的方式，来自form1，它也是MainForm的子表单

public partial class form1 : Form
{
    public form1()
    {
        InitializeComponent();
    }
    private void button1_Click(object sender, EventArgs e)
    {
        form2 f2 = new form2();
        f2.MdiParent = this.ParentForm;
        f2.Show();
    }
}

我如何将值从form1传递给form2？我尝试了将值传递给模态形式但我没做的

Form1中

public partial class form1 : Form
{
    public form1()
    {
        InitializeComponent();
    }
    private void button1_Click(object sender, EventArgs e)
    {
        form2  = new form2();
        f2.MdiParent = this.ParentForm;
        f2.name = textBox1.Text;
        f2.Show();   
    }
}

窗口2

public partial class form2 : Form
{
    public form2()
    {
        InitializeComponent();
    }
    private string NAME
    public string name
    {
        get { return NAME; }
        set { NAME = value; textBox1.Text = NAME; }
    }
}

Answer 1

我认为主要的问题是你用于按钮1点击Form1的事件处理程序，因为你在Form1中为button1发布了两个事件处理程序，但我尝试了这个并且它有效。将它放在按钮1的事件处理程序中，单击Form1

private void button1_Click(object sender, EventArgs e)
{
    //Create a new Instance of Form2
    Form2 f2 = new Form2();
    //Sets the MDI Property
    f2.MdiParent = this.ParentForm;
    //Shows the Form
    f2.Show();
    //Open the already created instance
    Form2 f = (Form2)Application.OpenForms["Form2"];
    //Update the Property
    f.name = textBox1.Text;
}

Answer 2

这对我有用，你没有InitializeComponent次调用的构造函数，而你的第二个代码发布没有分配给调用。

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

    private void button1_Click(object sender, EventArgs e)
    {
        Form2 form2 = new Form2();
        form2.MdiParent = this;
        form2.tb = textBox1.Text;
        form2.Show();
    }
}

public partial class Form2 : Form
{
    private string v;

    public Form2()
    {
        InitializeComponent();
    }

    public string tb
    {
        get { return textBox1.Text; }
        set { v = value; textBox1.Text = v; }
    }
}

Answer 3

当我将值从一个表单传递给另一个表单时，我通常会创建一个参数对象

public class FormParams
{
     public string Name {get; set;}
}

以接收参数的形式

public class Form2
{
   public FormParams Parameters {get; set;}
   ...
}

在进行通话的形式中，您可以执行类似

的操作

FormParams frmParams = new FormParams();
frmParams.Name = "KarlX"

Form2 form = new Form2();
form.Parameters = frmParams;
form.MdiParent = this;
form.Show();

如果要使用传递给表单的值，请使用

txtStackOverFlowName.Text = Parameters.Name;

Answer 4

您可以设置MdiParent，也可以拨打MdiParent

public partial class MainForm : Form // IsMdiContainer = true in Properties
{
    private void button1_Click(object sender, EventArgs e)
    {
        Form1 form1 = new Form1();
        form1.MdiParent = this;
        form1.Show();
    }
}

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

    private void button1_Click(object sender, EventArgs e)
    {
        Form2 form2 = new Form2();
        form2.MdiParent = this.MdiParent;
        form2.tb = textBox1.Text;
        form2.Show();
    }
}

public partial class Form2 : Form
{
    private string v;

    public Form2()
    {
        InitializeComponent();
    }

    public string tb
    {
        get { return textBox1.Text; }
        set { v = value; textBox1.Text = v; }
    }
}

将值从子表单传递到另一个子表单

4 个答案: