topic Re: How do I save a graphic selected from one feature layer to another feature layer in ArcGIS API for Silverlight Questions

How do I save a graphic selected from one feature layer to another feature layer

MuralidharMoka — Fri, 25 Mar 2011 15:46:32 GMT

Hi.

I have two similar feature layers f and fmh .
f has some features and fmh is empty.
Now I select a graphic from f and then want to add that to fmh.

I am doing it like this.
void f_MouseLeftButtonUp(object sender, ESRI.ArcGIS.Client.GraphicMouseButtonEventArgs e)

        {
            Graphic SelectedGraphic= e.Graphic;
               fmh.Graphics.Add(SelectedGraphic); //I get an error here
               fmh.Update();   //is this right
       }

I get an error like this
"Specified argument was out of the range of valid values.\r\nParameter name: Cannot add graphic to multiple graphiclayers"

Can any one help me with this.

Re: How do I save a graphic selected from one feature layer to another feature layer

DominiqueBroux — Sat, 11 Dec 2021 17:59:00 GMT

One graphic can't be added to 2 graphics layers.

So you have to create a new graphic.

Something like:

 
var newGraphic = new Graphic { Symbol = oldGraphic.Symbol, Geometry = Geometry.Clone(oldGraphic.Geometry), Attributes = oldGraphic.Attributes };

Re: How do I save a graphic selected from one feature layer to another feature layer

MuralidharMoka — Fri, 25 Mar 2011 16:56:16 GMT

Hi Dominique
Thank you for the reply.
I trying to write code like this

Graphic g= new Graphic()
                                  {
                                     Symbol = selectedGraphic.Symbol,
                                     Geometry = selectedGraphic.Geometry, //I did not find clone so is this right
                                    Attributes = selectedGraphic.Attributes //gives an error at compile time
                                  }

Error: Property or indexer 'Attributes' cannot be assigned to -- it is read only

Re: How do I save a graphic selected from one feature layer to another feature layer

DominiqueBroux — Sat, 11 Dec 2021 17:59:03 GMT

Error: Property or indexer 'Attributes' cannot be assigned to -- it is read only

You right. I forgot that.

You have to add the attribute one by one:

 
Graphic g= new Graphic()
{
Symbol = selectedGraphic.Symbol,
Geometry = selectedGraphic.Geometry, //I did not find clone so is this right
}

foreach (var kvp in selectedGraphic.Attributes)
{
        g.Attributes.Add(kvp);
}

Re: How do I save a graphic selected from one feature layer to another feature layer

MuralidharMoka — Fri, 25 Mar 2011 21:14:16 GMT

Thanks very much. This really helped me.
Great support.
Muralidhar Moka