Improve company productivity with a Business Account.Sign Up

x
?
Solved

String.Format as percentage based on decimal places

Posted on 2006-06-23
6
Medium Priority
?
895 Views
Last Modified: 2012-06-21
I need to format some values in a gridview.  They all need to display as a percentage (0-100%), but only show the decimals if they exist:

i.e.
  99       -->   99%
  86.56  -->   86.56%
  75.2    -->   75.2%

Is there a way to do this automatically using string.format?  If not, what's the easiest way to achieve what I need??
0
Comment
Question by:Rouchie
  • 3
  • 2
6 Comments
 
LVL 10

Accepted Solution

by:
ibost earned 1000 total points
ID: 16971515
Here's an example - maybe not the most elegant:

        Dim i As Double
        i = 98.1234

   ' Find location of the decimal place, if it exists
        Dim decimalLocation As Integer = IIf(i.ToString.IndexOf(".") >= 0, i.ToString.IndexOf("."), -1)

   ' Create the format string for %... such as P0, P1, P4, etc
        Dim precision As String = IIf(decimalLocation = -1, "P0", "P" & Len(i.ToString.Substring(decimalLocation + 1)))

   ' Divide i by 100 so 98.1234 becomes .981234 and then format as percentage making it 98.1234%
        Dim s As String = (i / 100).ToString(precision)

        Response.Write(s)


Output:
98.1234 %
0
 
LVL 10

Expert Comment

by:ibost
ID: 16971528
Actually you don't need the first IIF

This:
Dim decimalLocation As Integer = IIf(i.ToString.IndexOf(".") >= 0, i.ToString.IndexOf("."), -1)

Can just be:
Dim decimalLocation = i.ToString.IndexOf(".")
0
 
LVL 12

Expert Comment

by:deanvanrooyen
ID: 16974052
does this work?

               <asp:TemplateField >
                    <ItemTemplate>
                       <asp:Label ID="lb" runat="server" Text='<%# Eval("percent") %>'></asp:Label>%
                    </ItemTemplate>
                </asp:TemplateField>
0
Upgrade your Question Security!

Your question, your audience. Choose who sees your identity—and your question—with question security.

 
LVL 25

Author Comment

by:Rouchie
ID: 16982301
ibost,
I've implemented your suggestion but it removes all decimal placing.  This isn't what I needed - I only wanted rid of the decimals if it was n.00% or n.50% for example.  Currently the value 98.27 is formatted on-screen as 99%.   Can what you've done be amended at all?
Here's my code:

Dim i As Double = e.Row.DataItem("SkillLevel")
Dim decimalLocation As Integer = i.ToString.IndexOf(".")
Dim precision As String = IIf(decimalLocation = -1, "P0", "P" & Len(i.ToString.Substring(decimalLocation + 1)))
Dim l As Label = CType(e.Row.FindControl("lbl_skillLevel"), Label)
l.Text = (i / 100).ToString(precision)

deanvanrooyen,
I believe that would just add a % sign to the end of the label, correct??  Not all entries actually have scores, so I only need formatting where a number exists.
0
 
LVL 10

Expert Comment

by:ibost
ID: 16985285
what is i equal to right after you assign it e.Row.DataItem("SkillLevel")  ?

Try to Response.Write(i.tostring()) and see what it's value is.  

The code I gave above works for me.  Assume the value is 99.234

the IndexOf the decimal is (decimalLocation) is 2.  It then sets a precision string equal to "P" + length of the substring beginning after the decimal.  In this case Len(i.ToString.SubString(decimalLocation + 1)) is equal to 3.  So precision should be P3.

Maybe try this?

Dim precision As String = IIf(decimalLocation = -1, "P0", "P" & Len(i.ToString.Substring(decimalLocation + 1)).ToString())
0
 
LVL 25

Author Comment

by:Rouchie
ID: 16985975
Sorry ibost, there was a slight error in my select statement which after tracing, showed that your first suggestion did work.

Thank you very much for your help.
0

Featured Post

Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Introduction This article shows how to use the open source plupload control to upload multiple images. The images are resized on the client side before uploading and the upload is done in chunks. Background I had to provide a way for user…
The article shows the basic steps of integrating an HTML theme template into an ASP.NET MVC project
Free Data Recovery software is an advanced solution from Kernel Tools to recover data and files such as documents, emails, database, media and pictures, etc. It supports recovery from physical & logical drive after a hard disk crash, accidental/inte…
Did you know PowerShell can save you time with SaaS platforms? Simply leverage RESTfulAPIs to build your own PowerShell modules. These will kill repetitive tickets and tabs, using the command Invoke-RestMethod. Tune into this webinar to learn how…

595 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