topic Re: How to Create Dashed Line Border in a Dynamic Layer in ArcGIS API for Silverlight Questions

How to Create Dashed Line Border in a Dynamic Layer

TomRippetoe — Mon, 13 Jan 2014 22:24:53 GMT

Hello,

I am using the Silverlight 3.0 API and ArcGIS Server 10.1. I have a Dynamic Map Service Layer where i am trying to change polygon borders programmatically. I want to the ability to set the border to be a dashed line. Can this be done using any of the standard Symbol types, e.g. SimpleFillSymbol, and properties?

I have seen this example (http://forums.arcgis.com/threads/59645-How-to-create-Dash-Dot-Dot-Border-for-custom-fill-symbol) and this one (http://forums.arcgis.com/threads/59645-How-to-create-Dash-Dot-Dot-Border-for-custom-fill-symbol) but they seem to apply specificly to client side graphics - not the symbology within a dynamic layer.

I can set a dashed boundary using 'Symbol.FromJson' fairly easily but its not particularly easy nor elegant. Additionally, i haven't been able to locate any specs about the JSON in terms of what values are possible. For example, how can i control the dash pattern, or space between the dashes?

Thank you,

Re: How to Create Dashed Line Border in a Dynamic Layer

DominiqueBroux — Sun, 12 Dec 2021 16:38:00 GMT

No the standard SimpleFillSymbol doesn't support dashed lines.

The supported way to do it is to define your own serializable symbol.

The easiest but unsupported way is to use the internal ESRI.ArcGIS.Client.FeatureService.Symbols.SimpleFillSymbol.

Something like:

....
     xmlns:symbols="clr-namespace:ESRI.ArcGIS.Client.FeatureService.Symbols;assembly=ESRI.ArcGIS.Client">

......

<esri:LayerDrawingOptions.Renderer>
    <esri:SimpleRenderer>
        <esri:SimpleRenderer.Symbol>
            <symbols:SimpleFillSymbol BorderBrush="#74E01B" BorderThickness="1" Fill="#7074E01B" BorderStyle="DashDotDot"  />
        </esri:SimpleRenderer.Symbol>
    </esri:SimpleRenderer>
</esri:LayerDrawingOptions.Renderer>

Re: How to Create Dashed Line Border in a Dynamic Layer

TomRippetoe — Tue, 14 Jan 2014 15:11:25 GMT

Thank you for the suggestion. I will give that a try and let you know how it goes.

That's a nice little trick; why isn't it documented or 'supported'?

Re: How to Create Dashed Line Border in a Dynamic Layer

TomRippetoe — Tue, 14 Jan 2014 15:22:04 GMT

It works. Thanks again.