I have a repeater in my page and i try to use a stepline with the repeater.
in the itemdatabound th bind the data to the chart by filtering. I checked the data after filter and i found all things are ok.
My problem is that the page display the stepline charts but the it repeat the same data in all the charts. I think that is a problem in the chart when it tries to generate the data.
Have you any idea why the chart does not display the data correctly?
Thank you in advance.
http://community.infragistics.com/forums/p/23774/87173.aspx#87173
This response does not resolve my problem. If you nedd more details or some code i can send you.
Some code will be good. Can you send me your page in which you are creating the charts?
I tried the same code with a ListBox and it works fine. But when i use a chart control it does not works.
Here is my code with a chart control.
******************In my page************************
<body> <form id="form1" runat="server"> <div> <asp:Repeater ID="Repeater1" runat="server" OnItemDataBound="Repeater1_ItemDataBound"> <HeaderTemplate> Liste des graphes </HeaderTemplate> <ItemTemplate> </BR> Region : <%# DataBinder.Eval(Container.DataItem, "Region") %> <igchart:UltraChart ID="UltraChart1" runat="server" EmptyChartText="Data Not Available." Version="8.3"> </igchart:UltraChart> </ItemTemplate> </asp:Repeater> </div> </form></body>
****************************************************
***********************In my code behind********************
using System.Configuration;using System.Collections;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;
using Infragistics.WebUI.UltraWebChart;using Infragistics.UltraChart.Shared.Styles;
namespace ChartsTutorials.Repeater{ public partial class StepLineRepeater : System.Web.UI.Page { DataSet ds = new DataSet(); DataTable dataTable;
protected void Page_Load(object sender, EventArgs e) { DataTable regionTable = ds.Tables.Add("Regiontbl");
regionTable.Columns.Add("RegionId", typeof(int)); regionTable.Columns.Add("Region", typeof(string)); regionTable.Rows.Add(1, "Laval"); regionTable.Rows.Add(2, "MTL"); regionTable.Rows.Add(3, "QC");
dataTable = ds.Tables.Add("Data"); DateTime today = DateTime.Now; dataTable.Columns.Add("DateTime", typeof(DateTime)); dataTable.Columns.Add("dt1", typeof(int)); dataTable.Columns.Add("RegionId", typeof(int)); dataTable.Columns.Add("Id", typeof(int)); dataTable.Rows.Add(today, 0, 1, 1); dataTable.Rows.Add(today.AddMinutes(5), 10, 1, 2); dataTable.Rows.Add(today.AddMinutes(10), -20, 1, 3); dataTable.Rows.Add(today.AddMinutes(15), null, 1, 4); dataTable.Rows.Add(today.AddMinutes(20), 40, 2, 5); dataTable.Rows.Add(today.AddMinutes(25), 110, 2, 6); dataTable.Rows.Add(today.AddMinutes(30), 120, 2, 7); dataTable.Rows.Add(today.AddMinutes(35), -130, 2, 8); dataTable.Rows.Add(today.AddMinutes(40), -140, 2, 9); dataTable.Rows.Add(today.AddMinutes(30), 10, 3, 7); dataTable.Rows.Add(today.AddMinutes(35), 20, 3, 8); dataTable.Rows.Add(today.AddMinutes(40), 60, 3, 9);
ds.Relations.Add("RegionWithData", regionTable.Columns["RegionId"], dataTable.Columns["RegionId"]);
Repeater1.DataSource = regionTable; Repeater1.DataBind();
}
protected void Repeater1_ItemDataBound(object sender, RepeaterItemEventArgs e) { if (e.Item.ItemType != ListItemType.Item && e.Item.ItemType != ListItemType.AlternatingItem) return;
DataTable dt = ds.Tables["Data"]; DataView dv = new DataView(); dv = dt.DefaultView; int value = (int)(((DataRowView)e.Item.DataItem).Row["RegionId"]); dv.RowFilter = "RegionId = " + value;
UltraChart uc = (UltraChart)e.Item.FindControl("UltraChart1");
uc.ChartType = ChartType.StepLineChart;
uc.Data.UseRowLabelsColumn = true; uc.Data.RowLabelsColumn = 0; uc.AreaChart.TreatDateTimeAsString = false;
uc.Axis.X.Labels.ItemFormatString = "<ITEM_LABEL:dd, yyyy,mm:ss:fff>"; uc.Axis.Y.Labels.ItemFormatString = "<DATA_VALUE:##.##>";
uc.Data.DataSource = dv; uc.Data.IncludeColumn(0, true); uc.Data.IncludeColumn(1, true); uc.Data.IncludeColumn(2, false); uc.Data.IncludeColumn(3, false); uc.DataBind();
} }}***************************************************************
I'm not really sure what is your logic, but try coping the data in an array before set it as data source to the Chart. Just try adding:
...
uc.Axis.Y.Labels.ItemFormatString = "<DATA_VALUE:##.##>";
object[] objData = new object[dv.Count];
dv.CopyTo(objData, 0);
uc.Data.DataSource = objData;
uc.Data.IncludeColumn(0, true);
Thank you for your response,
In our project the DataView contain a lot of data (more than 100 000 records). I would not to copy the data t o an array. I would like to know why the chart does not work with DataView when i use a repeater control.
I think the issue here is that for every chart the DataView is the same.
Try changing:
DataView dv = new DataView();
dv = dt.DefaultView;
to:
dv.Table = dt;
When i use this code :
******************
DataView dv = new DataView(); dv = dt.DefaultView; int regionValue = (int)(((DataRowView)e.Item.DataItem).Row["RegionId"]); dv.RowFilter = "RegionId = " + regionValue;
*****************
I checked the data for the regionValue and i found that it changes his value.. So i think that the dataview is not the same.
Anyway, it work fine with the code you have proposed.
Thank you.
Thank you for your responce.
It works like a charm.