ASP Shopping CartForum & BBS
  - all for $20 from CodeToad Plus!
  Home || ASP | ASP.Net | C++/C# | DHTML | HTML | Java | Javascript | Perl | VB | XML || CodeToad Plus! || Forums || RAM 
Search Site:

Home » ASP » Article

ASP.NET Bar Chart Graph

Article by: Chris Goldfarb (4/8/2003)
Bookmark us now! Add to Favourites
Email a friend! Tell a friend
Sponsored by: FindMyHosting - Web Hosting Search
Summary: Complete source code to generate a horizontal bar chart graph in ASP.NET
Viewed: 20929 times Rating (29 votes): 
 4.6 out of 5
  Rate this Article   Read Comments   Post Comments

ASP.NET Bar Chart Graph

Online Demo

This script generates a series of horizontal bars in graph chart format, on an .aspx web page.

To run the graph script is very simple. First save the following code into a file called dotnetgraph.ascx

Select All Code

Then save the following in the same directory to a file called dotnetgraph.aspx

Select All Code

Within this aspx page you will see we set all the quantities and labels for the graph within the Page_Load function.

There is obviously plenty of scope for development in this section - for example, pulling these values directly from a database. But hopefully the elegant simplicity of these files will be a useful introduction to the concepts involved.

Added by the author

I was still a little new to .NET when I wrote this article two years ago , so there are a couple things I'd change if implementing now: 1. Use StringBuilder instead for the RenderItem method:
private String RenderItem (Int32 iVal, Int32 iMod, String sColor) {
StringBuilder sb = new StringBuilder();
sb.Append("<table border=0 bgcolor=" + sColor + " cellpadding=0 cellspacing=0><tr>");
sb.Append("<td align=center width=" + (iVal * iMod) + " nobr nowrap>");
sb.Append("<b>" + iVal + "</b>");
return sb.ToString();

StringBuilder is orders of magnitude faster than manipulating strings directly (strings are immutable).

CodeToad Experts

Can't find the answer?
Our Site experts are answering questions for free in the CodeToad forums
Rate this article:     Poor Excellent
View highlighted Comments
User Comments on 'ASP.NET Bar Chart Graph'
Posted by :  Archive Import (Jeremy Leppan) at 07:36 on Friday, September 05, 2003
Here however is something you could tweak

sql = "select count(login_id) as total_logins , user_name from valid_logins where ip_address <> '' and datediff('d',date_time,now()) < datepart('d',now()) + 1 group by user_name order by count(login_id) DESC ",dbconn)

while not rs.eof
redim preserve sItems(x_count)
redim preserve iValue(x_count)
sItems(x_count) = rs("user_name").value
iValue(x_count) = rs("total_logins").value
x_count = x_count + 1
end while
Posted by :  Archive Import (jeremy leppan) at 07:39 on Friday, September 05, 2003
Explaination of the above

You see the select - it select the total amount each user has logged into my system. But it does a little more than that.

It filters out the local address I use for testing. This could be replaced with a range if you like.

Then the date_diff thing. Its just a nice way to get all entries for this month.

You can not just to a datediff - 1 month. Cauase that would give you traffic for the last 30 days. You want traffic from the beginning of the month.

The group by, this is the part, that groups the logins to users.

then the loop.

Nothing fancy - just builds the instuctions for the graph
Posted by :  Archive Import (Yvonne) at 07:04 on Wednesday, September 17, 2003
how come we cant manage to run the bar chart even though we have implemented all the codings as accordingly??
Posted by :  Archive Import (TP) at 03:13 on Thursday, September 18, 2003
Is the code u provided above must be run in C# program? because we are using Visual Studio.Net - ASP.Net. However, the graph won't come out. can u send us the code for ASP.Net using vb language instead of c#.
Posted by :  csandvig at 12:24 on Friday, October 17, 2003
Excellent example - simple and it works! Thank you.
Posted by :  cüneyt at 19:38 on Saturday, February 28, 2004
Great, it works fine with static values.

I am trying to get the data from a database(MSDE), and
count the number of items and pass the result to iValue. I am using c#.

I have tried to use:
iValue = select count(BedID) from Wards;

but this returns a string not an Int32.

Please help?


To post comments you need to become a member. If you are already a member, please log in .


ASP Shopping Cart
by CodeToad Plus!
Complete source code and demo database(Access, though SQL compatible) to an ASP database driven e-commerce shopping basket, taking the user through from product selection to checkout. Available to CodeToad Plus! Members
Creating a Dynamic Reports using ASP and Excel
by Jeff Anderson
A simple way to generate Excel reports from a database using Excel.
ASP Format Date and Time Script
by Jeff Anderson
An ASP script showing the variety of date and time formats possible using the FormatDateTime Function.
Create an ASP SQL Stored Procedure
by Jeff Anderson
A beginners guide to setting up a stored procedure in SQL server and calling it from an ASP page.
Find Visitor Geographical location from IP address using ASP
by Per Soderlind
Where are your internet visitors coming from? Using simple ASP and the free GEOIP Database from Maxmind its quite easy to find out
The asp:checkbox and asp:checkboxlist control
by David Sussman, et al
Checkboxes are similar to radio buttons, and in HTML, they were used to allow multiple choices from a group of buttons.
Email validation using Regular Expression
by Jeff Anderson
Using regular expression syntax is an exellent way to thoroughly validate an email. It's possible in ASP.
Complete ASP Chat Application
by Brian Gillham
A bonus for codetoad regulars - this is a chat application implemented entirely in ASP and is ready to run immediately.
Creating an SQL Trigger
by Jeff Anderson
A beginners guide to creating a Trigger in SQL Server
ASP.NET Bar Chart Graph
by Chris Goldfarb
Complete source code to generate a horizontal bar chart graph in ASP.NET

Recent Forum Threads
•  ASP Shopping Cart Script
•  Exchange 2000 data
•  ASPX page not showing
•  Calling ASP from Stored procedure
•  DISTINCT Function with Date string
•  Overflow: Scroll - Back to Top
•  Sessions
•  page in a cell
•  Re: open excel file in html page

Recent Articles
ASP.NET Forum Source Code
Internal Search Engine
Javascript Growing Window
Simple date validation
Search engine friendly URLs using ASP.NET (C#.NET)
Function to Return Alpha Characters Only
The OSI Reference Model - A Clear and Concise Illustration !
Understanding Pointers to Functions in C
Application & Session Events in the Global.asax File
Socket Programming in Perl

Site Survey
Help us serve you better. Take a five minute survey. Click here!

© Copyright 2001-2004