我如何从表单1中获取控件的值，并在VBnet winform应用程序中的表单2中使用它 [英] How I do get value of control from form 1 and using it in form 2 in VBnet winform application

问题描述

我如何从表单1获取控件的值并在VBnet winform应用程序中的表单2中使用它

How I do get value of control from form 1 and using it in form 2 in VBnet winform application

推荐答案

究竟如何取决于关于表格之间的关系。如果您考虑打开另一个表单作为父母打开孩子的表单，请查看以下内容：

在两种形式之间传递信息，第1部分：父母对儿童 [ ^ ]

在两种形式之间传递信息，第2部分：儿童到父母 [ ^ ]

在两种表格之间传递信息，第3部分：儿童与儿童 [ ^ ]

它们在C＃中，但原理在VB中完全相同。

Exactly how depends on the "relationship" between the forms. If you think about a form which opens another form as a Parent opening a Child, then have a look at these:
Transferring information between two forms, Part 1: Parent to Child[^]
Transferring information between two forms, Part 2: Child to Parent[^]
Transferring information between two forms, Part 3: Child to Child[^]
They are in C#, but the principle is exactly the same in VB.

假设你没有打开form2，你按一个按钮打开它



在form1中（示例目的）我有一个文本框和两个按钮。



按钮1将文本框中的文本保存到字符串属性中，

按钮2打开表单2

Let's say you don't have form2 open, and you press a button to open it

In form1 (example purposes) I have a text box and a two buttons.

Button 1 saves text from the textbox into a string property,
Button 2 opens Form 2

Public Class Form1
    Property TextFromForm1 As String
    
    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        TextFromForm1 = txtString.Text
    End Sub

    Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
        Me.Hide()
        Form2.Show()

    End Sub
End Class

加载表单2时，会出现一个文本框，显示从中传递的文本Form1

使用：

When Form 2 loads, there is a text box that shows the text passed across from Form1
using:

TextForForm2 = Form1.TextFromForm1
TextBox1.Text = TextForForm2

希望这有帮助......让我来吧知道如果我理解错误的问题（New Here）

Hope this helps... Let me know If I'm understanding the question wrong (New Here)

我通常选择一个有一些PUBLIC变量的小型处理表格。通常这是我的启动表单，我只是隐藏，直到我关闭实际的应用程序。所以代码如下：

I normally opt for a small handling form that has some PUBLIC varibles. Normally this is my startup form that I just hide till I close the actual application. So the code would be as follows.

Public Class Form1
    Public myInfo as string="" 'Going to pass this varible on the opening of the other form. 

Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
    myInfo="Hello World"
    Me.Hide()
    Form2.Show()
End Sub

End class

第二种表格会有此代码。

The second form would have this code.

Public Class Form2

Private Sub Form_Load(sender As Object, e As EventArgs) Handles Me.Load
   
    msgbox(myInfo) 'Display the information we just passed.

End Sub

End class

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