Arcgis api for silverlight自定义一个Symbol

工作需要自定义个Arcgis的Symbol，后台代码中包含对项目DLL中Xaml文件读取，摘抄记录下。

参考：http://blog.csdn.net/leesmn/article/details/6882698

1. 用xaml写一个ControlTemplate。

<ControlTemplate  
    xmlns="http://schemas.microsoft.com/client/2007"   
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"   
    xmlns:sys="clr-namespace:System;assembly=mscorlib"    
    xmlns:vsm="clr-namespace:System.Windows;assembly=System.Windows"    >
    <Grid
        RenderTransformOrigin="0.5,0.5"        
        Height="50"        
        Width="50">
        <Grid.RenderTransform>
            <TransformGroup>
                <ScaleTransform x:Name="scale" ScaleX="1" ScaleY="1" />
                <TranslateTransform X="-25" Y="-25"/>
            </TransformGroup>
        </Grid.RenderTransform>

        <vsm:VisualStateManager.VisualStateGroups>
            <vsm:VisualStateGroup x:Name="CommonStates">
                <vsm:VisualState x:Name="Normal">
                    <Storyboard>
                        <DoubleAnimation BeginTime="0:0:0" Storyboard.TargetName="scale" Storyboard.TargetProperty="ScaleX" To="1" Duration="0:0:0.3" />
                        <DoubleAnimation BeginTime="0:0:0" Storyboard.TargetName="scale" Storyboard.TargetProperty="ScaleY" To="1" Duration="0:0:0.3" />
                    </Storyboard>
                </vsm:VisualState>
                <vsm:VisualState x:Name="MouseOver">
                    <Storyboard>
                        <DoubleAnimation BeginTime="0:0:0" Storyboard.TargetName="scale" Storyboard.TargetProperty="ScaleX" To="2" Duration="0:0:0.3" />
                        <DoubleAnimation BeginTime="0:0:0" Storyboard.TargetName="scale" Storyboard.TargetProperty="ScaleY" To="2" Duration="0:0:0.3" />
                    </Storyboard>
                </vsm:VisualState>
            </vsm:VisualStateGroup>
            <vsm:VisualStateGroup x:Name="SelectionStates">
                <vsm:VisualState x:Name="Selected" />
                <vsm:VisualState x:Name="Unselected" />
            </vsm:VisualStateGroup>
        </vsm:VisualStateManager.VisualStateGroups>
        <Image            
            HorizontalAlignment="Center"            
            VerticalAlignment="Center"            
            Height="16"            
            Width="16"            
            Source="Images/sym.png"   
            />
        <Image
            HorizontalAlignment="Center"            
            VerticalAlignment="Center"            
            Height="24"            
            Width="24"            
            Source="Images/symout.png"/>
        <TextBlock HorizontalAlignment="Center"            
            VerticalAlignment="Center"            
            Height="20"            
            Width="40"     
            Margin="0,0,0,30"
            FontWeight="Bold"
            Foreground="Purple"
            FontSize="9"
            Text="mynumb"/>
    </Grid>
</ControlTemplate>

2. 定义一个类OnSymbol继承自MarkerSymbol。

    public class OnSymbol : MarkerSymbol
    {
        public OnSymbol(string username)
            : base()
        {
            try
            {
                StreamResourceInfo info = App.GetResourceStream(new Uri("SilverlightApplication3;component/OnlineSymbol.xaml", UriKind.RelativeOrAbsolute));
                StreamReader sr = new StreamReader(info.Stream);                
                string template = sr.ReadToEnd();
                template = template.Replace("mynumb", username);
                this.ControlTemplate = (ControlTemplate)XamlReader.Load(template);
            }
            catch (Exception ex)
            {
                MainPage.add_to_logger(ex);
            }
        }
    }

3. 对于图层对象的Symbol就可以直接赋值OnSymbol 实例  

tmpGraphic.Symbol = new OnSymbol(mobileName);