Jump to content
Software FX Community

Conditional Line Chart


skjhaveri
 Share

Recommended Posts

Hi,

 I am using ChartFx WPF 8.0 Beta release. I have collection contains two properties Date and Value

So i wanted to draw line chart where i am abble to plot each value in graph.

Now by default value which are passing from pastdate (date less or equal to today) should show as solid line, but any future date line should apply DashArray for line. Is it possible to achieve with single series in chart!!!

 Thanks

Shrenik

Link to comment
Share on other sites

>> Is it possible to achieve with single series in chart!!!

Yes, it is possible. There are 2 ways to accomplish this, manually user per-point attributes or using Conditional Attributes

1) Using per-point Attributes

The Points collection allows you to assign per-point attributes.

private void PageLoaded(object sender, EventArgs e)

{

  chart1.DataBound +=

new EventHandler(OnChartBound);

}void OnChartBound (object sender, EventArgs e)

{

 

// Find the first point that matches your criteria (date greater than today)

 

int firstPoint = 4;

  PointAttributes pointAttr = new PointAttributes();

  pointAttr.StrokeDashArray =

new DoubleCollection(new double[] { 1, 2});

 

int n = chart1.Data.Points;

  for (int i = firstPoint; i < n; i++)

  chart1.Points = pointAttr;

}

2-a) Using ConditionalAttributes in code

private void PageLoaded(object sender, EventArgs e)

{

 

ConditionalAttributes conditional = new ConditionalAttributes();

  conditional.StrokeDashArray =

new DoubleCollection(new double[] { 1, 2 });

 

RangeCondition rangeCondition = new RangeCondition();

  rangeCondition.From =

DateTime.Today;

  rangeCondition.BindingPath =

"X";

  conditional.Condition = rangeCondition;

  chart1.ConditionalAttributes.Add(conditional);

}

2-B) Or using ConditionalAttributes in XAML

<

cfx:Chart.ConditionalAttributes>

  <

cfx:ConditionalAttributes StrokeDashArray="1 2">

  <

cfx:ConditionalAttributes.Condition>

  <

cfx:RangeCondition From="{x:Static sys:DateTime.Today}" BindingPath="X"/>

  </

cfx:ConditionalAttributes.Condition>

  </

cfx:ConditionalAttributes>

</

cfx:Chart.ConditionalAttributes>

Where sys and cfx are defined in your root XAML node as follows

xmlns:sys="clr-namespace:System;assembly=mscorlib"

xmlns:cfx="clr-namespace:ChartFX.WPF;assembly=ChartFX.WPF"

Unfortunately we recently discovered (and fixed) an issue related to conditional attributes when using dates in the X axis, if you want to follow this approach please send an email to wpf at softwarefx dot com requesting an updated build.

Regards,

JuanC

Link to comment
Share on other sites

  • 5 weeks later...

Thanks

 I have achieved this by creating my own condition. following is code for that

/// <summary>

  /// Check Tomrrow is condition extension for validating dates which are greater than current date

  /// so graph should show data for those dates in Dash format.

  /// </summary>

  public sealed class CheckTomorrow : ConditionBase

  {

  /// <summary>

  /// Evaluates the specified cond value.

  /// </summary>

  /// <param name="condValue">The cond value.</param>

  /// <returns></returns>

  public override bool Evaluate(ConditionValue condValue)

  {

  Data data = condValue.DataItem as Data;

  if (null != data)

  {

  return ((Data)condValue.DataItem).Date > DateTime.Today;

  }

  return false;

  }

  }

 

Now can you help me for more issues??

1. How to constomise Legend in XAML. I didnt find any default style or template and not able to generate in Expression. Which type its targeting what can be datacontext of that???

2. If i create run time series than its adding two more series its own, no idea from where its come. any clue!!!

3. Can i create style of series attribute and apply thru my code???

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...