Question using progressbar

[ghassan_aljabiri]

hello

i build a form to do a search in a database

this form contains a progressbar with visible=false

if the user clicks the search button :
1- the progressbar should be visible
2- do the search
3- put the results counter in a label
4- the progressbar should be inVegetable (invisible)

I use this code

ProgressBar1.Visible = True
        Dim SQLString As String
        SQLString = ConstrutctSQL()
        Dim myConn As New System.Data.OleDb.OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\GS\GS\GDB.mdb")
        myConn.Open()
        Dim myComm As New System.Data.OleDb.OleDbCommand(SQLString, myConn)
        Dim dr As System.Data.OleDb.OleDbDataReader
        dr = myComm.ExecuteReader
        dr.Read()
        Label1.Text = dr.Item("numOfCases")
        Label3.Tag = SQLString
        Panel7.Visible = True
        System.Threading.Thread.Sleep(5000)

        ProgressBar1.Visible = False

but the progressbar do not appear while searching, while everything else is going fine

 

[Robert_Zenz]

You'll need a Control.Refresh Method (System.Windows.Forms), Application.DoEvents Method (System.Windows.Forms) or BackgroundWorker Class (System.ComponentModel) .

Bobby

 

[ghassan_aljabiri]

could you drop morre details pleaze

 

[formlesstree4]

Why are you having the thread stop for 5000ms?

Also, use a backgroundworker class. Its simple to report progress that way. The reason nothing is showing is because your programs' GUI thread is being utilized by the calls you're doing. If you make the code work in a BGW class, the program won't freeze up and you can have your progress bar work.

 

[ghassan_aljabiri]

I searched the net for a sample code

but all of them are complicated

is there any thing for dummies

 

[jmcilhinney]

[ame="http://www.vbforums.com/showthread.php?t=471889"]BackgroundWorker examples[/ame]