Question

我遇到了这段代码的问题，我无法弄清楚原因。它第一次工作正常，但第二次在此行崩溃时出现“参数无效”错误：

Dim tbx As TextBox = New Windows.Forms.TextBox

完整代码如下：

Dim tbx As TextBox = New Windows.Forms.TextBox
tbx.Name = tbxName
tbx.Size = New System.Drawing.Size(55, 12)
tbx.BorderStyle = BorderStyle.None
tbx.TextAlign = HorizontalAlignment.Center
Using f As Font = tbx.Font
  tbx.Font = New Font(f.FontFamily, 8, FontStyle.Bold)
End Using
tbx.Location = New System.Drawing.Point(xCords, 44)
Select Case tbx.Name
  Case "tbxBulk01" : tbx.Text = Bulk01Label
  Case "tbxBulk02" : tbx.Text = Bulk02Label
End Select
Me.Controls.Add(tbx)

这是堆栈跟踪：

在System.Drawing.Font.GetHeight（图形图形）在System.Drawing.Font.GetHeight（）在System.Drawing.Font.get_Height（）在System.Windows.Forms.Control.get_FontHeight（）在System.Windows.Forms.TextBoxBase.get_PreferredHeight（）在System.Windows.Forms.TextBoxBase.get_DefaultSize（）在System.Windows.Forms.Control..ctor（Boolean autoInstallSyncContext）在System.Windows.Forms.TextBoxBase..ctor（）在System.Windows.Forms.TextBox..ctor（）

感谢任何帮助。

Answer 1

我知道这是一个老问题，但这是我的答案。

我怀疑

使用....结束使用部分。

我刚刚在反馈中读过，哦，好吧，没关系。

Public Class Form1

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        Dim xCoords As Integer = 80
        Dim myTextBox As TextBox = New TextBox

        For index As Integer = 1 To 2
            myTextBox = New TextBox
            myTextBox.Name = "MyTextBox" & index.ToString
            myTextBox.Size = New System.Drawing.Size(55, 12)
            myTextBox.BorderStyle = BorderStyle.None
            myTextBox.TextAlign = HorizontalAlignment.Center
            myTextBox.Font = New System.Drawing.Font(myTextBox.Font.FontFamily, 8, FontStyle.Bold)
            myTextBox.Location = New System.Drawing.Point(index * xCoords, 44)
            Select Case index
                Case 1 : myTextBox.Text = "Bulk01Label"
                Case 2 : myTextBox.Text = "Bulk02Label"
            End Select
            Me.Controls.Add(myTextBox)
        Next

    End Sub
End Class

无法创建第二个文本框

1 个答案: