Hide Legend for invisible Chartseries

[gisela]

Hi Syncfusion team,

i have a chart with 3 chartseries, sometimes the third series should not be displayed. How can i remove the third label in the legend:

Can i customize the legend with a template und when yes, can you give me an example?

Thanks in advance 

gisela

[Srihari Muthukaruppan]

Hi Gisela, 

 

We have analysed your query. From that, we would like to let you know that we can achieve your requirement by using name property in the chart. We have attached our demo sample link for your reference. Please find the below code snippet and screenshot. 

  

Sample:  https://www.syncfusion.com/downloads/support/directtrac/general/ze/LegendCustomization-1688206851.zip 

  

Code Snippet: 

 // add your additional code here  

     <ChartSeriesCollection> 

            <ChartSeries DataSource="@DataSource" XName="x" YName="y" Name="Vorjahr" Fill="Grey" Type="ChartSeriesType.Column"> 

            </ChartSeries> 

            <ChartSeries DataSource="@DataSource" XName="x" YName="y1" Name="lst" Fill="Green" Type="ChartSeriesType.Column"> 

            </ChartSeries> 

            <ChartSeries DataSource="@DataSource" XName="x" YName="y2" Type="ChartSeriesType.Column"> 

            </ChartSeries> 

        </ChartSeriesCollection> 

// add your additional code here 

  

Screenshot: 

   

 

Let us know if you have any concerns. 

 

Regards, 

Srihari M 

[gisela]

Hello Srihari,

thank you for your quick answer.

Your sample works, but is that logical?

I think it would be better if the legend for an invisible chartseries (property "visible = false) wasn't shown.

Thanks

Gisela

[Srihari Muthukaruppan]

Hi Gisela, 

 

We are sorry for the inconvenience. 

 

It’s the default behaviour to show a legend item in disabled state, when its appropriate series is not visible on the chart, so that whenever you dynamically click on that disabled legend item, you can get back that series visible on the chart (the legend item will also get changed to enabled mode). 

 

As per your requested scenario now, to hide that legend item from the UI, when its corresponding series visible property is set to false, it should be able to be handled via the LegendRender event for which we have logged an improvement task to support legend customization. And you can keep track of it from the below feedback portal link.    

 

Feedback Link: https://www.syncfusion.com/feedback/17461/need-to-provide-legendrender-event-support-to-the-chart-in-blazor 

 

This feature will be included in our upcoming Vol-3 main release and if you have any more specification/precise replication procedure or a scenario to be tested, you can add it as a comment in the portal. 

 

Please let us know, if you need any further assistance on this. 

 

Regards, 

Srihari M 

[Srihari Muthukaruppan]

Hi Gisela,  

  

Sorry for the inconvenience.  

   

Due to some technical difficulties, we couldn't include this in our volume 3 release. We will include this feature in our volume 4 release which is expected to be rolled out by the mid of December 2020. We appreciate your patience until then.  

   

Regards,  

Srihari 

[Srihari Muthukaruppan]

Hi Gisela, 

 

Sorry for the inconvenience.   

    

Due to complexity in implementation, we are unable include this feature in our volume 4 release. We will consider this feature in our volume 1 release which is expected to be rolled out by the end of March 2021. We appreciate your patience until then.   

    

Regards,   

Srihari 

[Durga Gopalakrishnan]

Hi Gisela, 

 

We regret for inconvenience caused. This feature will be available in our upcoming Volume 2 Main Release which is expected to be rolled out at end of June 2021. We appreciate your patience until then. 

 

Regards, 

Durga G

[Durga Gopalakrishnan]

Hi Gisela,

We are glad to announce that our Essential Studio 2022 Volume 4 release v20.4.0.38 is rolled out; we have included the reported requirement and is available for download under the following link.

https://www.syncfusion.com/forums/179561/essential-studio-2022-volume-4-main-release-v20-4-0-38-is-available-for-download

<SfChart>

    <ChartEvents OnLegendItemRender="LegendEvent"></ChartEvents>

</SfChart>

@code {

public void LegendEvent(LegendRenderEventArgs args)

    {

        Console.WriteLine(args.Text);

    }

}

Sample : https://www.syncfusion.com/downloads/support/directtrac/general/ze/ChartLegRender630302245.zip

We thank you for your support and appreciate your patience in waiting for this release. Please get in touch with us if you would require any further assistance.

Regards,          

Durga Gopalakrishnan.