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refresh label

Posted on 2008-10-29
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1,431 Views
Last Modified: 2012-06-27
hello experts,
i have an application whereby a label is reading the content of a text file. i added a refresh button which should refresh the content of the label. what is the code for refreshing koz i already tried lblDisplay.refresh without success
-------------------------Reading-----------------------------  Private Sub mnuOpen_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuOpen.Click
 
 If lstDrafts.FocusedItem.Index = 0 Then
            Dim reader As StreamReader
            reader = File.OpenText("\Drafts\MessageNum0.txt")
            Dim contents As String = reader.ReadToEnd()
            lblDisplay.Text = contents
            lblDisplay.Visible = True
            reader.Close()
        End If
end sub
-------------------------Refreshing button------------------------------
    Private Sub mnuRefresh_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuRefresh.Click
        lblDisplay.Refresh()
        lblDisplay.Visible = False
    End Sub

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Question by:Alv45525
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6 Comments
 
LVL 8

Accepted Solution

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dampsey earned 125 total points
ID: 22838579
Refresh command, just redraws the current content of the label. It does not read the file again.

What you should do is, call the reading function again.
Private Sub mnuOpen_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuOpen.Click
 
 If lstDrafts.FocusedItem.Index = 0 Then
       lblDisplay.Text = ReadTheFileContent()
       lblDisplay.Visible = True
 End If
end sub
 
private function ReadTheFileContent() as string
Dim reader As StreamReader
            reader = File.OpenText("\Drafts\MessageNum0.txt")
            Dim contents As String = reader.ReadToEnd()
            reader.Close()
            return contents
end function
 
    Private Sub mnuRefresh_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuRefresh.Click
       lblDisplay.Text = ReadTheFileContent()
   End Sub

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Author Comment

by:Alv45525
ID: 22838778
hello dampsey, i tried it but still after reading the label does not get refresh
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LVL 8

Expert Comment

by:dampsey
ID: 22838793
are you sure you change the content of the correct file and save it before refreshing?
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Author Comment

by:Alv45525
ID: 22838804
look i have two txt files listed in a treeview. when the first 1 is selected,
label.visible= true and it displays content of txt 1

if button close(refresh) is selected, the label should clear its content, that is the txt1 and hide again.

when user select second txt file, label appears again and displays content of txt 2
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Author Comment

by:Alv45525
ID: 22838867
thx 4 ur help dampsey..but i've been able to do it...

it wrote

lblDisplay.text = nothing
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Author Closing Comment

by:Alv45525
ID: 31511558
Thx 4 ur help...i appreciate that u too the time 4 answering me
thX loads

tke care.N hpe to here frm u!
tke care
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