从编程创建的复选框中获取结果 [英] getting a result from a programatically created checkbox

问题描述

我创建了一个Windows窗体应用程序，并以编程方式添加了几个控件。每次添加的控件都不一样 - 它们是动态的，具体取决于我的数据。控件将是TextBox或CheckBox。

用户输入数据并单击提交后，我显然必须从我创建的控件中检索数据。  使用  Me.Controls.Item（a）.Text 从TextBox获取数据没有问题。

但是，我无法确定如何判断是否已检查CheckBox。

如果我使用 me.controls.item（a）.ToString 我得到" System.Windows.Forms.CheckBox，CheckState：1 " ;,但我想知道是否能访问该CheckState（或检查）而不必解析该字符串

解决方案

格雷琴，

这是一种常见的方式：

 Option Strict On 
选项显式在
选项推断关闭
 
公共类Form1 
私有子Form1_Load（发件人为System.Object，_ $ b $为As System.EventArgs）_ 
 Handles MyBase.Load 
 
 Dim cb As New CheckBox 
 
 with cb 
 .Name =" CheckBox1" 
 .Location = New Point（40,80）
 .Text =" Yes" 
结束与
 
 Me.Controls.Add（CB）
 
的AddHandler cb.CheckedChanged，AddressOf CheckBox_CheckedChanged 
 
结束子
 
  Private Sub _ 
        CheckBox_CheckedChanged（发件人为System.Object的，_ 
                  &NBSP ;           &NBSP，E作为System.EventArgs）
 
     &NBSP ; 如果TypeOf发件人是CheckBox那么            Dim cb As CheckBox = DirectCast（发件人，CheckBox）
 
            MessageBox.Show（的String.Format（QUOT;名称：{0} {1}经过：{2}" ;, _ 
         &NBSP ;                        &NBSP ;       cb.Name，vbCrLf，_ 
                                            cb.Checked））       结束如果
 
   结束次级
结束等级

如上所示，我有"停止"。这就像一个断点。当它到达那里时，将鼠标悬停在"cb"上。你可以访问它的所有属性。

我修改了一些，我展示了你想要的一些属性：

I have created a Windows Forms App and have programatically added several controls to it. The controls that are added are not the same every time - they are dynamic depending on my data. The controls will either be a TextBox or a CheckBox.

After the user enters the data and clicks Submit, I obviously have to retrieve the data from the controls I created.  I have no problem with getting the data from the TextBox, using Me.Controls.Item(a).Text.

However, I cannot figure our how to tell if the CheckBoxes have been checked.

If I use me.controls.item(a).ToString I get "System.Windows.Forms.CheckBox, CheckState: 1", but I am wondering if I can access that CheckState (or Checked) without having to parse that string?

解决方案

Gretchen,

This is a common way:

Option Strict On
Option Explicit On
Option Infer Off

Public Class Form1
    Private Sub Form1_Load(sender As System.Object, _
                           e As System.EventArgs) _
                           Handles MyBase.Load

        Dim cb As New CheckBox

        With cb
            .Name = "CheckBox1"
            .Location = New Point(40, 80)
            .Text = "Yes"
        End With

        Me.Controls.Add(cb)

        AddHandler cb.CheckedChanged, AddressOf CheckBox_CheckedChanged

    End Sub

     Private Sub _
        CheckBox_CheckedChanged(sender As System.Object, _
                                e As System.EventArgs)

        If TypeOf sender Is CheckBox Then
            Dim cb As CheckBox = DirectCast(sender, CheckBox)

            MessageBox.Show(String.Format("Name: {0}{1}Checked: {2}", _
                                          cb.Name, vbCrLf, _
                                          cb.Checked))
        End If

    End Sub
End Class

As you can see above, I have "Stop". That works like a breakpoint. When it gets there, hover your mouse over "cb" and you have access to all of its properties.

I have modified it some and I'm showing some of the properties you'll want:

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