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Calculates and display gallons of water used and  total charged

Posted on 2011-03-21
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Last Modified: 2014-10-24
Code an application so that it calculates and displays the number of gallons of water used and the total charge for water. the charge for the water is $1.75 per 1000 gallons or .00175 per gallon. Make the calculations  only when the current meter reading is greater than or equal to the previous meter reading; other wise diplay an approiate message.Displya total charge with a dollar sign and two decimals. the text boxes should only accept numbers and th backspace key.Clear number of gallons used and the total charge when a change is made to contents. when a text box receives focus, select its exsisiting text.


I have attached the zip file of what I have so far  
Allenton-Solution.sln
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Question by:sweety53216
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LVL 51

Expert Comment

by:HainKurt
ID: 35181886
your attached file is not showing any code... you posted solution file by mistake instead of code file...
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Author Comment

by:sweety53216
ID: 35181982
ublic Class Form1

    Private Sub TextBox5_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs)

    End Sub

    Private Sub btnExit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExit.Click
        Me.Close()

This is what I have so far

    End Sub

    Private Sub bntCalc_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles bntCalc.Click
        'calculates total gallons and total charge

        lbltotalgallons.Text = Val(TxtCurrent.Text) - Val(Txtprevious.Text)
        lbltotalcharge.Text = Val(lbltotalgallons.Text) * 0.00175
        lbltotalcharge.Text = Format(lbltotalcharge.Text, "currency")
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LVL 51

Accepted Solution

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HainKurt earned 500 total points
ID: 35182160
use Convert.ToInt32

dim pRead as int = Convert.ToInt32(Txtprevious.Text)
dim cRead as int = Convert.ToInt32(TxtCurrent.Text)
dim totalCharge as double

if (pRead<cRead) then
  totalCharge  = (cRead-pRead) * 0.00175
  lbltotalcharge.Text = totalCharge.ToString("#,000.00")
end if

check here for more formatting options:

http://msdn.microsoft.com/en-us/library/kfsatb94.aspx
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