如何將用戶控件表單放置在VB.NET表單中？

Question

我希望能夠通過單擊一個按鈕來顯示用戶控制表單。 我無法使用.show（）顯示該表單，就像使用常規表單一樣。

問題：如何將用戶控件表單放置在VB.net表單中？

我應該改一下這個問題。 如何在表單中顯示用戶控件表單。 當我建立表格時，我並不完全確定這項工作是否可行。

碼：

Public Class Form1

    Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
        Dim MyDialog As New ColorDialog()
        ' Keeps the user from selecting a custom color.
        MyDialog.AllowFullOpen = True
        ' Allows the user to get help. (The default is false.)
        MyDialog.ShowHelp = True
        ' Sets the initial color select to the current text color,
        MyDialog.Color = TextBox1.ForeColor

        ' Update the text box color if the user clicks OK  
        If (MyDialog.ShowDialog() = Windows.Forms.DialogResult.OK) Then
            TextBox1.ForeColor = MyDialog.Color
        End If
    End Sub

    Private Sub Button5_Click(sender As System.Object, e As System.EventArgs) Handles Button5.Click
        Dim myCoolFile As String = "C:\Users\itpr13266\Desktop\test.txt" '// your file location.
        Dim tempStr As String = IO.File.ReadAllText(myCoolFile) '// read file into a String.
        Dim x As Integer = tempStr.Length - 1 '// get String length, Index based, starting at 0 not 1.
        Dim myArray(x) As String '// create your String Arrays.
        Dim i As Integer = 0 '// Integer used to increase Array #'s.

        For Each myChr As Char In tempStr '// loop thru each each character in the String.
            myArray(i) = myChr '// add values to each String Array.
            i += 1 '// increase count for next Array.
        Next

        For number As Integer = 1 To myArray.Length - 1 Step 1 'loops through the array by 1 and to 1 less the length
            Debug.Write(myArray(number)) 'write the value in the array to the debug window
        Next
    End Sub

    Private Sub Button6_Click(sender As System.Object, e As System.EventArgs) Handles Button6.Click
        UserControl1.Show()
    End Sub
End Class

Answer 1

這里有兩個解決方案。 一種方法是在您的項目中創建一個新Form ，並使其托管UserControl 。 然后，在Button6_Click方法中實例化Form （該代碼類似於Button1_Click方法中的ColorDialog代碼）。 另一個解決方案是直接在Button6_Click處理程序中實例化一個占位符表單，如下所示：

Private Sub Button6_Click(sender As System.Object, e As System.EventArgs) Handles Button6.Click
    Using UserControl1 As FooUserControl = New FooUserControl()
        Using tmpForm As Form = New Form()
            tmpForm.Width = UserControl1.Width
            tmpForm.Height = UserControl1.Height
            tmpForm.Controls.Add(UserControl1)
            tmpForm.ShowDialog()
        End Using
    End Using
End Sub

坦率地說，第一種方法是更清潔的方法，通過使用WinForms Designer作為宿主窗體，您將對如何呈現UserControl擁有更多的控制權。

Answer 2

嘗試在致電之前將可見性設置為True

UserControl1.Visible = True