如何将值从一个表单传递到另一个表单的动态创建的控件 [英] How to pass value from one form to another form's dynamically created control

问题描述

假设我有两个表单，即 Form1 和 Form2.Form1 包含动态创建的 DataGridView 控件，Form2 包含两个 Textbox 控件(Textbox1 和 Textbox2) 和一个 Button 控件.

当我 DoubleClick 在 DataGridView 的单元格上时，它将打开 Form2 并且当前选定单元格的数据传递到 Form2 的 Textbox1

代码如下:

我向动态创建的 DatagridView 添加了一个句柄，如下所示:

<前>AddHandler dg.CellMouseDoubleClick, AddressOf dg_DataGridEdit

<前>Private Sub dg_DataGridEdit(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellMouseEventArgs)Dim dgView As DataGridView = DirectCast(sender, DataGridView)Form2.TextBox1.Text = dgView.CurrentCell.Value.ToString()Form2.ShowDialog()结束子

当我单击 Form2 中的按钮时，当前选定单元格的值会像 Form2 中的 TextBox2 一样发生变化.但问题是我不能使用来自 From2 的 button1 中的代码，例如

<前>Form1.dgView.CurrentCell.Value = TextBox2.Text

如何将值从 textbox2 传递到当前选定的单元格?

解决方案

好的，我明白了.起初我创建了一个名为

的公共变量<前>公共 UpdateData As String = ""

然后更改代码-

<前>Private Sub dg_DataGridEdit(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellMouseEventArgs)Dim dgView As DataGridView = DirectCast(sender, DataGridView)Form2.TextBox1.Text = dgView.CurrentCell.Value.ToString()Form2.ShowDialog()dgView.CurrentCell.Value = 更新数据更新数据=""结束子

在form2中

<前>Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) 处理Button1.Clickform1.UpdateData = TextBox2.Text我.隐藏()结束子

Suppose I have two forms i.e Form1 and Form2. Form1 contains dynamically created DataGridView control and Form2 contains two Textbox controls (Textbox1 and Textbox2) and a Button control.

When I DoubleClick on the DataGridView's cell it will open Form2 and the data from current selected cell passes to Form2's Textbox1

Here is the code:

I Added a handlear to my dynamically created DatagridView like this:

    AddHandler dg.CellMouseDoubleClick, AddressOf dg_DataGridEdit

    Private Sub dg_DataGridEdit(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellMouseEventArgs)
                Dim dgView As DataGridView = DirectCast(sender, DataGridView)
        Form2.TextBox1.Text = dgView.CurrentCell.Value.ToString()
                Form2.ShowDialog()
    End Sub

When i click on the button from Form2, the value of current selected cell will change like TextBox2 from Form2 has. But the problem is i can't use the code from button1 from From2 like

    Form1.dgView.CurrentCell.Value = TextBox2.Text

How can i pass value from textbox2 to current selected cell?

解决方案

Ok I got it. At first i have created a public variable called

    Public UpdateData As String = ""

Then change the code-

    Private Sub dg_DataGridEdit(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellMouseEventArgs)

                Dim dgView As DataGridView = DirectCast(sender, DataGridView)
                Form2.TextBox1.Text = dgView.CurrentCell.Value.ToString()
                Form2.ShowDialog()
                dgView.CurrentCell.Value =UpdateData
                UpdateData=""
    End Sub

In form2

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        form1.UpdateData = TextBox2.Text
        Me.Hide()
    End Sub

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