在母版页系统中同时调用两个形式挂起 [英] calling two form same time in master page system getting hanging

问题描述

我正在使用Windows窗体应用程序，

i有两个窗口form.in两种形式我使用后台工作者和计时器..我的表单代码之一如下：

i am working on windows form application,,
i have two windows form.in both form i am using background worker and timer..one of the my form code like this:

sub filldgv
        Dim dt As New DataTable
        dt.Columns.Add("Tbarcode", GetType(String))
        dt.Columns.Add("PlateNo", GetType(String))
            dt.Columns.Add("Driver", GetType(String))
            dt.Columns.Add("KeyTime", GetType(Integer))
            dt.Columns.Add("DelTime", GetType(Integer))

        Dim bgw As New BackgroundWorker()
        AddHandler bgw.DoWork, Sub() Populate(dt)
            AddHandler bgw.RunWorkerCompleted, Sub()
            DGVReleased.AutoGenerateColumns = True
            DGVReleased.DataSource = dt
            DGVReleased.Columns(0).Width = 120
            DGVReleased.Columns(1).Width = 65
            DGVReleased.Columns(2).Width = 65
            DGVReleased.Columns(3).Width = 65
            DGVReleased.Columns(4).Width = 65
            Call changecolor()
            End Sub                          

        bgw.RunWorkerAsync()
end sub

Sub Populate(ByVal dt As DataTable

            Using reader As TextReader = File.OpenText("C:\Program Files\IBS\login.txt")
            txtvalue = Integer.Parse(reader.ReadLine())

        End Using
        Glocid = txtvalue
            Dim cmd = New SqlCommand("IBS_fetchreleasedinpodiumgrid")

        cmd.CommandType = CommandType.StoredProcedure
        cmd.Connection = con.connect
        cmd.Parameters.Add("@locid", SqlDbType.Int).Value = Glocid

        Dim dr = cmd.ExecuteReader
        While dr.Read
            DGVReleased.AutoGenerateColumns = True

                Dim o = {dr("TBarcode").ToString(),
                         dr("PlateNo").ToString(),
                         dr("DelEcode").ToString(),
                If(IsDBNull(dr("KRRT")), 0, dr("KRRT")),
                    If(IsDBNull(dr("DT")), 0, dr("DT"))}

                        dt.Rows.Add(o)
        End While


        dr.Close()
        con.disconnect()
End Sub

此表单名称为frmreleased ,,和另一个名称frmreq uested..this表格也有这样的代码..在表格大师我称之为两种形式..同时...就像这样：

this form name is frmreleased,,and another form name frmrequested..this form also having code like this..in form master i am calling this two forms..same time..like this:

  frm8= New frmreleased
 frm8.Location = New Point(375, 399)
frm8.MdiParent = Me
frm8.Show()

 frm9 = New frmrequested
frm9.Location = New Point(996, 399)
frm9.MdiParent = Me
frm9.Show()

但是在增加数据的同时网格视图我的系统挂起......我正在使用back grounder和timer两种形式..我可以运行我的应用程序而不需要挂起系统..

but while increasing data in the grid view my system is hanging...i am using back grounder and timer both forms..how i can run my application without hanging the system..

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