X Axis

[prcunningham]

If I am using a datatable as my source, how do I identify the x axis. 

[TatianaG]

Please try the following code:

DataTable dt = new DataTable();DataColumn dc1 = new DataColumn();dc1.ColumnName = "X";dc1.DataType = Type.GetType("System.Int32");DataColumn dc2 = new DataColumn();dc2.ColumnName = "Y";dc2.DataType = Type.GetType("System.Int32");dt.Columns.Add(dc1);dt.Columns.Add(dc2);......

 DataTableProvider data = new ChartFX.WebForms.DataProviders. DataTableProvider (dt);

chart1.DataSourceSettings.Fields.Add( new FieldMap ( "X" , FieldUsage .XValue)); //Setting X axis

chart1.DataSourceSettings.Fields.Add( new FieldMap ( "Y" , FieldUsage .Value)); //Setting series chart1.DataSource = data;

 

[prcunningham]

that works but there is still a problem.  I have multiple series and I am using allowdrag.  when i do it your way if I drag values from any series other that the first series everything disappears except the point that I dragged.

[TatianaG]

Can you please send me a little sample code of how are you populating the chart? Because I also have AllowDrag activated and it doesn't seem to be any problem.

[prcunningham]

This my code. How do I attach a image?  I tried dragging on the default data thats loaded when the chart first comes up and it did the same thing. 

 

dt = New DataTable("Test")

Dim cols() As String = {"Total Time", "Time", "Bot Temp", "Pressure", "Top Temp", "MFC4", "Argon", "ArN2", "Vent"}For Each col As String In cols

dt.Columns.Add(col, Type.GetType(

"System.Single"))

Next

 

cfx.Series.Clear()

cfx.DataSourceSettings.Fields.Add(New FieldMap("Total Time", FieldUsage.XValue))

For Each dc As DataColumn In dt.ColumnsIf Not dc.ColumnName.Equals("Total Time") Then cfx.DataSourceSettings.Fields.Add(New FieldMap(dc.ColumnName, FieldUsage.Value))

Next

cfx.DataSourceSettings.DataSource =

New DataTableProvider(dt)

[prcunningham]

It only does it with the default data if it is set to gallery type X vs Y

[TatianaG]

The way to achieve what you want is by processing the DataChangedByUser event as follows:

private void chart1_DataChangedByUser (object sender,PointLabelEventArgs e)

{

  if (e.Axis == chart1.AxisX)

  e.Handled = true; // Prevent change of X-Axis values

}

Please try it and let me know if it works for you.

[prcunningham]

That was it.  Thank you very much.  For future reference where would I have found that information?