将 TextBox 的名称键入 TextBox，然后能够检索命名 TextBox 的内容

Question

例如，我想根据我在框中写的内容来声明文本框。如果我写 textbox1。如果我输入 textbox2.text 那么它将是 textbox2.text

Dim txt As TextBox = TextBox2.Text.ToString
Dim txt As String = TextBox2.Text

none 个方法有效

Answer 1

你的措辞虽然令人困惑，但看起来你想将 TextBox 的名称键入 TextBox，然后能够检索指定 TextBox 的内容。如果这是正确的，您可能正在寻找具有递归选项的 Controls.Find()：

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    Dim txtBoxName As String = TextBox1.Text.Trim
    If txtBoxName.Length > 0 Then
        Dim ctl As Control = Me.Controls.Find(txtBoxName, True).FirstOrDefault
        If Not IsNothing(ctl) AndAlso TypeOf (ctl) Is TextBox Then
            Dim tb As TextBox = DirectCast(ctl, TextBox)
            ' ... do something with "tb" ...
            Dim value As String = tb.Text
            MessageBox.Show(value)
        Else
            MessageBox.Show("Control not found, or incorrect type!")
        End If
    End If
End Sub

将 TextBox 的名称键入 TextBox，然后能够检索命名 TextBox 的内容

type the NAME of a TextBox into a TextBox and then be able to retrieve the contents of the named TextBox

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