Generate Charts In Serverside Excel Dynamically, Advisable?
I have a new approach to saving charts from server-side Excel when ASP pages are processed. The charts show weather data that is updated every 15 minutes in a database, and instead of just automating the chart production so that every chart is generated every 15 minutes, 24 hrs/day, it seems smarter to generate up to date charts when people want to look at them. But I'm not sure if this is the best approach.
This is what I can do from an ASP page to dynamically chart data:
- run Excel on the server
- open a Worksheet that has a customized chart for a range of cells.
- insert new data in the charted range of cells (chart auto-updates).
- save the chart to a gif file.
- insert the gif into the html page viewed by the client.
Using this approach is convenient because I can customize charts to look exactly as I want without having to find the documentation to automate the chart formatting.
Is it possible to run Excel once on the server, and let all requests for charts use this one running instance of Excel? The alternative is that Excel will run once for each chart request, this seems like it could get out of hand pretty quickly if a lot of people are trying to look at charts at the same time.
Are there better ways to generate charts dynamically on the server?
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There are two files here.. TEST_CHART_RUN.HTM calls the second file. Please copy and paste these files as needed to htm and asp files.
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I have found a Help and Support for How To Use Server-Side Charting to Generate Charts Dynamically in MSDN;
http://support.microsoft.com/default...b;en-us;244049
I have generated Bar, Line and Pie charts using the MSOWC.DLL and its fantastic.
The ONLY problem I have encountered is when generating Pie charts it shows the quntities of each piece inside the Pie chart and its very hard to read. But in Excel it shows outside the Pie chart. So, I want to find out a solution for this.
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'this is path to notepad in win2k
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