ERROR : Cross-thread operation not valid: Control 'listView1' accessed from a thread other than the thread it was created on. and i want a split a continuous charcet string into manually after 12...

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VB

Private Sub SMSPort_DataReceived(ByVal sender As Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles comPort.DataReceived

        Dim str As String = ""
        Dim temp As String = ""

        objCon.GetConnectionString()
        If e.EventType = SerialData.Chars Then

            SMSPort.DtrEnable = True
            System.Threading.Thread.Sleep(100)
            tempp = SMSPort.ReadExisting().Replace("", "").Trim()

// here i want to add th split charcters
        '   For i As Integer = 1 To tempp.Length Step 12
            '  Debug.Write(Mid(tempp, i, 12))

            If tempp <> "" Then
                objCon.GetConnectionString()
                objCon.GetConnection("Insert into tblAttended(Id,Status,Date,Time)values('" + tempp.ToString() + "','In','" + System.DateTime.Today.ToShortDateString() + "','" + DateTime.Now.ToShortTimeString() + "')")

                ListView1.Items.Add(tempp)  '<big>ERRORR</big>
                txtUniqueNumber.Text = tempp.Trim() ''<big>ERRORR</big>
                ListView1.AutoResizeColumns(ColumnHeaderAutoResizeStyle.ColumnContent)
            End If
            'Next i
            Control.CheckForIllegalCrossThreadCalls = False
End Sub

Posted 6-Dec-12 20:08pm

Amit.p30

Updated 6-Dec-12 20:13pm

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

v2

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2 solutions

Solution 3

Hello! Amit,

First, You have to declare one variable for every property your want to change at application level. so that u can access these variables in your primary thread as well as secondary thread.

Now, instead of updating the property directly, you have to update the property from secondary thread and access that variable in primary thread to update the desired property.

hope it helps,

mark as answer if helped..........

Posted 7-Dec-12 0:03am

AnkitGoel.com

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Rahul K Singh · Accepted Answer · 2012-12-06T20:19:00

Solution 1

HI,
You must be calling this method from delegate which send it to different thread and from different thread you cannot access the primary thread. what you should do is just update variables and access them from Primary thread.

I guess it may help you.

RKS

Posted 6-Dec-12 20:19pm

Rahul K Singh

Comments

Amit.p30 7-Dec-12 4:10am

Thank u so mch..... but i havent idea regarding update variables.. kindly explain with demo...