如何在Xtracharts devexpress中设置日期时间限制

Question

I am using a devexpress xtrachart in which in x-axis there is date. Now, the date in x-axis I am binding from database as: y-axis has values

chartControl1.DataSource=dt;//used datatable
chartControl1.SeriesDataMember = "VariableName";
chartControl1.SeriesTemplate.ArgumentDataMember = "LastTime";
chartControl1.SeriesTemplate.ValueDataMembers.AddRange(new string[] { "LastValue" });
chartControl1.SeriesTemplate.ChangeView(ViewType.Line);
((DevExpress.XtraCharts.XYDiagram)(chartControl1.Diagram)).AxisX.Label.DateTimeOptions.Format = DateTimeFormat.General;

Now, the datetime in database is for today date and different hours like

but in chart its showing like below only one datetime:

How can i fix this, I just want it to show today's datetime(and time not as 00:00:00) That is if for today range in x-axis must be like: startdate in x-axis one hour before current datetime and enddate in x-axis one hour after current datetime or one hour difference

example if current datetime is 2014-10-11 10:00:00 in x-axis it show like 2014-10-11 09:00:00 , 2014-10-11 10:00:00 , 2014-10-11 11:00:00 ..

I tried VisualRange and WholeRange too but its not working.

Answer 1

It's two step process show date and time in the scale:

1. Set the Axis.DateTimeOptions.Format property to DateTimeFormat.General .

2. Then Axis.DateTimeScaleOptions property with custom settings.

    (XYDiagram)chartControl1.Diagram).AxisX.DateTimeOptions.Format = DateTimeFormat.General; (XYDiagram)chartControl1.Diagram).AxisX.DateTimeScaleOptions.GridAlignment = DevExpress.XtraCharts.DateTimeGridAlignment.Minute; (XYDiagram)chartControl1.Diagram).AxisX.DateTimeScaleOptions.MeasureUnit = DevExpress.XtraCharts.DateTimeMeasureUnit.Minute; 

Currently Axis.DataTimeScaleOptions.GridAlignment and MeaureUnit property by default set to Day, so you are able to see the single data data with Aggregation operation(Sum etc).

Refer:
devexpress xtracharts showing date only

I just want it to show today's datetime(and time not as 00:00:00) That is if for today range in x-axis must be like: startdate in x-axis one hour before current datetime and enddate in x-axis one hour after current date time or one hour difference

Try to tweak with Range properties, below is the just example snippet:

DateTime start = DateTime.Today;
XYDiagram diagram = (XYDiagram)chartEditor.Diagram;

diagram.AxisX.WholeRange.Auto = false;
diagram.AxisX.VisualRange.SetMinMaxValues(start.AddHours(0), start.AddHours(24));