如何将文本从动态生成的用户控件传输到文本框

我有一个Windows窗体，其中一个按钮1，当点击一个用户控件动态添加代码就是这个

int c = 0; private void button1_Click(object sender, EventArgs e) { int v; v = c++; panel1.VerticalScroll.Value = VerticalScroll.Minimum; UserControl1 us = new UserControl1(); us.Name = "us" + v; us.Location = new Point(50, 5 + (30 * v)); us.Tag = btn; panel1.Controls.Add(us); } 

usercontrol包含4个控件2个combobox和2个文本框

即combobox1 combobox2 textbox1 textbox2

有4个文本框，它们是相同的forms

still-textbox1，still-textbox2，still-textbox3，still-textbox4

还有一个button2 ，它会将文本传输到combobox和texboxes，这是oldcombobox1 oldcombobox2 oldtextbox1 old textbox2

当button1单击两次时，它将在我希望以此格式传输文本的表单中添加两个usercontrol

oldcombobox1.text = still-textbox1.text +“，”+ combobox1.text（动态生成）+“，”+ combobox1.text（动态生成）等来自用户控件的动态添加的所有combobox1）

oldcombobox2.text = still-textbox2.text +“，”+ combobox2.text（动态生成）+“，”+ combobox2.text（动态生成）等来自用户控件的动态添加的所有combobox2）

oldtextbox1.text = still-textbox3 +“，”+ textboox1.text（动态生成）+“，”+ textbox1.text（动态生成）等所有动态添加的用户控件的textbox1）

表示当still-textbox1.text = first时和动态usercontrol添加三次时它将包含3次combobox1然后

oldcombobox1应该包含

最前一页，combobox1.text，combobox1.text，combobox1.text

我已经制作了这段代码，但它不起作用

  foreach (Control ctrl in panel1.Controls) { if (ctrl is UserControl) { UserControl1 myCrl = ctrl as UserControl1; oldcombobox1.text = still-textbox1.text + "," + myCrl.comboBox1.Text; oldcombobox2.Text =still-textbox2.text + "," + myCrl.comboBox2.Text; oldtextbox1.Text = still-textbox3.text + "," + myCrl.textBox1.Text; oldtextbox2.Text.Text = still-textbox4.text + "," + myCrl.textBox2.Text; } } 

Answer 1

你应该为你想从另一个对象访问的每个字符串添加你的类UserControl1 （伟大名称btw ;-)）这样的东西，在这种情况下是textBox1的字符串：

 public String FirstTextBoxText { get { return this.textBox1.Text; } } 

然后你可以在你的Form类中说：

  if (ctrl is UserControl) { UserControl1 myCrl = ctrl as UserControl1; // ... oldtextbox1.Text = still-textbox3.text + "," + myCrl.FirstTextBoxText; } 

它仍然是可怕的代码，但它会工作。

Answer 2

我会用事件来做这件事。

创建一个inheritance自EventArgs的类:(我更喜欢VB，你可以进行traslate）

 Public Class ControlEventArgs Inherits EventArgs Public Property Value1 As String = String.Empty Public Property Value2 As String = String.Empty Public Property Value3 As String = String.Empty Public Property Value4 As String = String.Empty End Class 

然后在您的Control中添加事件：

 Public Event ValueSubmittal As EventHandler(Of ControlEventArgs) 

在你的Button2_Click处理程序中：

 RaiseEvent ValueSubmittal(me, new ControlEventArgs With {.Value1=comboBox1.Text, .Value2 = comboBox2.Text, .Value3 = textBox1.Text, .Value4 = textBox2.Text} 

在您动态创建控件的表单中，您需要连接事件处理程序：

 AddHandler myNewControl.ValueSubmittal, AddressOf ValueSubmittalHandler 

和ValueSubmittalHandler：

 Private Sub ValueSubmittalHandler(sender as Object, e As ControlEventArgs) formControl1.Text = e.Value1 formControl2.Text = e.Value2 ' etc... End Sub 

Answer 3

您可以创建一个类级变量：

  private UserControl1 us1; private UserControl1 us2; private void button1_Click(object sender, EventArgs e) { int v; v = c++; panel1.VerticalScroll.Value = VerticalScroll.Minimum; if(us == null) { //this is the first time the control is created us1 = new UserControl1(); us1.Name = "us" + v; us1.Location = new Point(50, 5 + (30 * v)); us1.Tag = btn; panel1.Controls.Add(us1); } else if(us2 ==null) { us2 = new UserControl1(); //whatever code you want to execute to change second one //you can access first control as us1.xxx panel1.Controls.Add(us2); } else { //3rd 4th etc... } }