Solved

help on error message

Posted on 2008-10-02
4
184 Views
Last Modified: 2010-04-21
i got this code that when i get to put a value in room service the whole thing stop working and tell me Conversion from string "" to type 'Double' is not valid."}. my code is suppose to calculate subtotal which is telephoneChg + RoomService + Laundry my code is the follow please help
If TextBox4.Text.Length = 0 AndAlso TextBox5.Text.Length = 0 AndAlso TextBox6.Text.Length Then Exit Sub
If Not IsNumeric(TextBox4.Text) OrElse Not IsNumeric(TextBox5.Text) AndAlso TextBox6.Text.Length Then Exit Sub
 
        dblRoomService = CDbl(TextBox5.Text)
        dblTelephone = CDbl(TextBox4.Text)
        dblLaundry = CDbl(TextBox6.Text)
        Subtotal = dblRoomService + dblTelephone + dblLaundry
        TextBox7.Text = CStr(Subtotal)
        TextBox7.Text = Format(Subtotal, "$#,##0.00")
    End Sub

Open in new window

0
Comment
Question by:elrayiss
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
4 Comments
 
LVL 44

Accepted Solution

by:
Arthur_Wood earned 400 total points
ID: 22628330
you missed a value at the end of the first line:

If TextBox4.Text.Length = 0 AndAlso TextBox5.Text.Length = 0 AndAlso TextBox6.Text.Length Then Exit Sub
If Not IsNumeric(TextBox4.Text) OrElse Not IsNumeric(TextBox5.Text) AndAlso TextBox6.Text.Length Then Exit Sub
 

should read
If TextBox4.Text.Length = 0 AndAlso TextBox5.Text.Length = 0 AndAlso TextBox6.Text.Length = 0 Then Exit Sub
If Not IsNumeric(TextBox4.Text) OrElse Not IsNumeric(TextBox5.Text) AndAlso TextBox6.Text.Length Then Exit Sub
 
notice the = 0 after TextBox6.Text.Length
 

Open in new window

0
 
LVL 44

Expert Comment

by:Arthur_Wood
ID: 22628347
also, the second line should read:
If Not IsNumeric(TextBox4.Text) OrElse Not IsNumeric(TextBox5.Text) OrElse Not IsNumeric(TextBox6.Text) Then Exit Sub
 

Open in new window

0
 

Author Closing Comment

by:elrayiss
ID: 31502485
excellent thank you
0
 
LVL 44

Expert Comment

by:Arthur_Wood
ID: 22645844
Glad to be of assistance.

AW
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

The purpose of this article is to demonstrate how we can use conditional statements using Python.
Since upgrading to Office 2013 or higher installing the Smart Indenter addin will fail. This article will explain how to install it so it will work regardless of the Office version installed.
The viewer will learn additional member functions of the vector class. Specifically, the capacity and swap member functions will be introduced.
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.

630 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question