There are multiple pages . On each page dynamic checkboxes. I check some checkboxes on first page i go to next page & check 2 more checkboxes . so when i return back to first page the checked checkboxes becomes unchecked. So how do i avoid this ?

with thans and regards,
Kaushik Chandra Pulpa

Add some code so that when a check box is ticked set a variable.
On return to the page if the variable is set then fill in the tick on the page


Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
   If Session("CheckBox1IsChecked") = "Y" Then
     CheckBox1.Checked = True
   End If
End Sub


Protected Sub CheckBox1_CheckedChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles CheckBox1.CheckedChanged
    If CheckBox1.Checked = True Then
       Session("CheckBox1IsChecked") = "Y"
    End If
End Sub


Make sure that to start with the Session("CheckBox1IsChecked") is set to something other than "Y"

hi kaushik,
this is Shakti.

just set the viewstate property of that checkbox to true,
now every time the page goes to server the state of that control is maintained in its viewstate property.
so no need to write any code.

reply ur comments.