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dear,
I have a problem need your help. I need display dynamic Chart after user choice, so I use session to save message which user have choiced.However,the session is null in page of TChart1.Import.LoadFromURL("example.aspx").I must get data from database by user's selected .Could you please teach me how to do?

Hi rock,

Have you looked at the ASP Server Examples included with TeeChart's installation? I'd recommend you to look at the first 3 examples and do an hybrid example between all them. First one for generating a live chart, second one for using a database and third one for passing a parameter.

Hope this helps!