表单4中的按钮在表单1中不会触发

本文关键字：表单 按钮 | 更新日期: 2023-09-27 18:17:47

目标是单击FORM4中的Button1，然后允许WebBrowser1在FORM1中导航到该站点。

我一直得到这个错误:错误1 'NO1。Form4'不包含接受0个参数的构造函数

表格1 

    Form4 mForm;
    private void button92_Click(object sender, EventArgs e)
    {
          if (mForm == null) 
          {
          mForm = new Form4();
          mForm.FormClosed += new FormClosedEventHandler(mForm_FormClosed);
          mForm.Show();
             }
        else 
          {
         if (mForm.WindowState == FormWindowState.Minimized)
           mForm.WindowState = FormWindowState.Normal;
          mForm.Focus();
          }
}
void mForm_FormClosed(object sender, FormClosedEventArgs e)
{
  mForm = null;
}
4

形式

        public partial class Form4 : Form
        {
   private Form1 m_parent;
    public Form4(Form1 frm1)
    {
        InitializeComponent();
        m_parent = frm1;
    }

    private void button1_Click(object sender, EventArgs e)
    {
        m_parent.webBrowser1.Navigate("google.com");
    }
    private void Form4_Load(object sender, EventArgs e)
    {

    }
}

表单4中的按钮在表单1中不会触发

像这样更新你的函数(将this添加到构造函数中):

private void button92_Click(object sender, EventArgs e)
{
     if (mForm == null) 
     {
         mForm = new Form4(this);
         mForm.FormClosed += new FormClosedEventHandler(mForm_FormClosed);
         mForm.Show();
     }
     else 
     {
         if (mForm.WindowState == FormWindowState.Minimized)
             mForm.WindowState = FormWindowState.Normal;
          mForm.Focus();
     }
}

您的Form4类只有一个构造函数，并且有一个参数Form1。

根据它的外观，您希望在单击事件

中将Form1实例传递到Form4构造函数中。
if (mForm == null)
{
    mForm = new Form4(this);
    mForm.FormClosed += new FormClosedEventHandler(mForm_FormClosed);
    mForm.Show();
}
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