主题：逻辑有点乱，请大神帮忙间化一下

Dim r As Row = Tables("项目经理").Current
If r IsNot Nothing Then
    If Tables("项目经理").Current("证件图片") <> "" Then
        Dim result As dialogresult= MessageBox.show("是否替换证件?","提示",MessageBoxButtons.YesNo,MessageBoxIcon.Question)=DialogResult.Yes
        If result = DialogResult.No Then
            Return ""
        End If
    End If
    Dim dlg As new OpenFileDialog
    If dlg.ShowDialog = DialogResult.OK Then
        Dim name As String = r("专业") & r("证件名称") & "-" & r("姓名") & "." & FileSys.GetName(dlg.FileName).Split(".")(1)        '文件名格式
        If ftp1.Upload(dlg.FileName, "\证件管理\项目经理\" & name) = True Then
            r("证件图片") &= IIF(r.IsNull("证件图片"), "/证件管理/项目经理", vbcrlf) & "/" & name          '列显示路径
            Messagebox.show("上传完成!","提示",MessageBoxButtons.OK,MessageBoxIcon.Information)
        Else
            Messagebox.show("上传失败!","提示",MessageBoxButtons.OK,MessageBoxIcon.Information)
        End If
    End If
End If