Marked Zone Label TextBlock: Position Auto / BringToFront / MainColorOpacity

[Zarni Winlatt]

Hello

I am working on line graph and came across this issue which I could not resolve, hopefully someone can answer me on this

Referring to the attached part of my graph, i am trying to label the highest point using marked zone

However, depending on the dynamic value of my points, there will be situations where the label will be overlapped below the line

I tried:

• myMarkedZone.Label.TextBlock.BringToFront(), and radChart.save() failed
• myMarkedZone.Label.TextBlock.Appearance.FillStyle.MainColorOpacity = 50, and was told that this property is ReadOnly
• myMarkedZone.Label.TextBlock.Appearance.Position.Auto = true, and it appears to be positioned TopLeft

Can anyone enlighten me on how to resolve this issue?

Thanks!

[Ves]

Hello Zarni,

The marked zones will always appear behind the series. I would suggest using the ChartSeriesItem label. You can find the item with max value and hide the labels for the rest of the items, while leaving this one visible and customized. Here is an example:

void RadChart1_DataBound(object sender, EventArgs e)
    {
        var maxItem = RadChart1.Series[0].Items.Aggregate((a, b) => b.YValue > a.YValue ? b : a);
        foreach (var item in RadChart1.Series[0].Items)
        {
            if (item != maxItem)
                item.Label.Visible = false;
            else
                item.Label.TextBlock.Text = "My Max";
        }
    }

Best regards,
Ves
the Telerik team

[Zarni Winlatt]

Thanks for the suggestion, the solution worked!

However, it triggered another issue, where there seems to have truncated label with maximum character count on the label (see attached)

I tried setting LabelAppearance-Dimensions-AutoSize="false" and LabelAppearance-Dimensions-Width="500" but both does not work

Kindly enlighten me or whether this is a limitation?

Thanks!

[Ves]

Hello Zarni,

This is the default behavior for all text elements within RadChart. In this case it is controlled by the
ChartSeries.Appearance.TextAppearance.MaxLength property. The default value is 30, so the ellipsis points appear after the 30-th character. You can increase the value as per your needs.

Greetings,
Ves
the Telerik team