Initiate postback for textboxes

 I have 4 textboxes, 2 that you can write to and 2 you can't. The totalbox is a readonly and uses the data from the shipprcbox, taxbox, and subtotalbox to make its calculations. I'm currently using a click event initilize the money sub which works but i would like to be able to have the data just update right when it's entered and i can't seem to figure out why its not working (i have set the textboxes with autopostback="true").

 

     Public Sub money()            If IsNumeric(taxbox.Text) = True Then              taxbox.BackColor = Drawing.Color.White              POl.Tax = Convert.ToDecimal(taxbox.Text)          Else              taxbox.Text = "0.00"              POl.Tax = 0.0              taxbox.BackColor = Drawing.Color.Red          End If            If IsNumeric(shipprcbox.Text) = True Then              shipprcbox.BackColor = Drawing.Color.White              POl.Shipping = Convert.ToDecimal(shipprcbox.Text)          Else              shipprcbox.Text = "0.00"              POl.Shipping = 0.0              shipprcbox.BackColor = Drawing.Color.Red          End If              subtotalbox.Text = String.Format("{0:F2}", POl.SubTotal)          fintotalbox.Text = String.Format("{0:F2}", POl.Total)          taxbox.Text = String.Format("{0:F2}", POl.Tax)          shipprcbox.Text = String.Format("{0:F2}", POl.Shipping)    end sub

 


Read Full article Here.