Databind from LINQ

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  1. Henrique Duarte
    Henrique Duarte avatar
    106 posts
    Member since:
    Oct 2003

    Posted 05 Jan 2008 Link to this post

    Hi guys!

    It's my first time using radChart.
    I want to databing a line chart using a selecting event, but I don't know how to do it.

    Here is my query:

    var q = from f in dc.Faturas  
            where f.MesReferencia >= Convert.ToDateTime("01/01/2005")  
            && f.MesReferencia <= Convert.ToDateTime("01/05/2005")  
            group f by new 
            {  
                f.Conta.UnidadeGestora_link_Empresa.Empresa.TipoServico.NmTipoServico,  
                f.MesReferencia  
            } into g  
            orderby g.Key.NmTipoServico, g.Key.MesReferencia  
            select new 
            {  
                g.Key.NmTipoServico,  
                g.Key.MesReferencia,  
                Consumo = g.Sum(f => f.Consumo)  
            };  
     
    e.Result = q;  
     

    Here is the data returned from query:

     
    NmTipoServico MesReferencia Consumo
    Água e Esgoto 01/2005 87080
    Água e Esgoto 02/2005 82731
    Água e Esgoto 03/2005 94414
    Água e Esgoto 04/2005 87396
    Água e Esgoto 05/2005 87490
    Eletricidade 01/2005 53439474
    Eletricidade 02/2005 53415549
    Eletricidade 03/2005 54183221
    Eletricidade 04/2005 56598759
    Eletricidade 05/2005 55553372
    Gás 01/2005 23572
    Gás 02/2005 22319
    Gás 03/2005 19459
    Gás 04/2005 26683
    Gás 05/2005 32863
    Telefonia 01/2005 2123603
    Telefonia 02/2005 2111587
    Telefonia 03/2005 2015812
    Telefonia 04/2005 2071964
    Telefonia 05/2005 2079275


    Anyone can give me an example?

    Thx!

    Henrique
  3. Vlad
    Admin
    Vlad avatar
    11100 posts

    Posted 08 Jan 2008 Link to this post

    Hello Henrique,

    You can bind the chart using various techniques - please visit data-binding section in RadChart examples for more info. Here are few examples:

    Binding to complex objects using ObjectDataSource:
    http://www.telerik.com/DEMOS/ASPNET/Prometheus/Chart/Examples/DataBinding/Objects/DefaultCS.aspx

    Binding to arrays:
    http://www.telerik.com/DEMOS/ASPNET/Prometheus/Chart/Examples/DataBinding/Arrays/DefaultCS.aspx

    Binding to lists:
    http://www.telerik.com/DEMOS/ASPNET/Prometheus/Chart/Examples/DataBinding/Lists/DefaultCS.aspx

    Please visit also this example to know more about how to declare line chart:
    http://www.telerik.com/DEMOS/ASPNET/Prometheus/Chart/Examples/Skinning/Lines/DefaultCS.aspx

    Kind regards,
    Vlad
    the Telerik team

    Instantly find answers to your questions at the new Telerik Support Center
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