我正在使用VB从文本文件中搜索一些数据，然后填充到Excel中。它正在工作。问题是xl。visible=true使Excel工作表立即可见，然后值继续填充。我想隐藏Excel，直到数据填充完成。然后使一个按钮出现在窗体上，当单击时，将显示Excel文件。
请帮助。下面是我使用的代码：

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

    ' create an excel instance
    Dim xl = Microsoft.VisualBasic.CreateObject("Excel.Application")
    xl.Visible = False
    Dim wb = xl.Workbooks.Add()
    Dim sheet = wb.ActiveSheet

    ' find lines starting with any whitepace followed by MTV or MTB and capture
    ' the text after =
    Dim pattern = "(?<=\s*(MTV).*=).*"

    Dim i = 1
    Dim arg = {Microsoft.VisualBasic.ControlChars.CrLf, Microsoft.VisualBasic.ControlChars.Lf}

    If RichTextBox3.Text = "" Then
        MsgBox("No input. What will I process??")

        Else
        Timer1.Start()
            For Each line In File.ReadLines(RichTextBox3.Text)
                Dim match = Regex.Match(line, pattern)
                ' check each line and fill sheet

            If match.Success Then
                sheet.Cells(i, 1).Value = match.Value
                i += 1
            End If
        Next
    End If

    xl.Visible = True

End Sub