ArcGIS API for Silverlight 之ElementLayer使用及TextSymbol的模板使用



   

在开发中动态在地图上添加文字信息，可以使用TextSymbol添加文字

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1. //动态添加文本  
2. TextSymbol textSymbol = new TextSymbol()  
3. {  
4.         FontFamily = new System.Windows.Media.FontFamily("Microsoft YaHei"),  
5.         Foreground = new System.Windows.Media.solidColorBrush(Color.FromArgb(255, 255, 0, 0)),  
6.         FontSize = 14,  
7.         Text = item.ZDMC,  
8.         OffsetX = 12,  
9.         OffsetY = -5  
10. };  
11.   
12. Graphic graphicText1 = new Graphic()  
13. {  
14.          Geometry = mercator.FromGeographic(new MapPoint(double.Parse(item.Latitute.ToString().Trim(), System.Globalization.CultureInfo.InvariantCulture), double.Parse(item.Longitute.ToString().Trim(), System.Globalization.CultureInfo.InvariantCulture))),  
15.          Symbol = textSymbol  
16. };  
17.   
18. graphicText1.Attributes["TextYLZMC"] = item.ZDMC;  
19. graphicslayer1.Graphics.Add(graphicText1);  

//动态添加文本
TextSymbol textSymbol = new TextSymbol()
{
        FontFamily = new System.Windows.Media.FontFamily("Microsoft YaHei"),Foreground = new System.Windows.Media.solidColorBrush(Color.FromArgb(255,255,0)),FontSize = 14,Text = item.ZDMC,OffsetX = 12,OffsetY = -5
};

Graphic graphicText1 = new Graphic()
{
         Geometry = mercator.FromGeographic(new MapPoint(double.Parse(item.Latitute.ToString().Trim(),System.Globalization.CultureInfo.InvariantCulture),double.Parse(item.Longitute.ToString().Trim(),System.Globalization.CultureInfo.InvariantCulture))),Symbol = textSymbol
};

graphicText1.Attributes["TextYLZMC"] = item.ZDMC;
graphicslayer1.Graphics.Add(graphicText1);

 

如果要考虑给文字加背景颜色的话，该类就无法起作用了

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1. //动态添加带背景颜色的文字信息  
2.  Border b = new Border();  
3.  b.Background = new SolidColorBrush(Colors.Blue);  
4.  b.Height = 20;  
5.  b.CornerRadius = new CornerRadius(5);  
6.  TextBlock tb = new TextBlock();  
7.  tb.Text = item.ZDMC;  
8.  tb.Foreground = new SolidColorBrush(Colors.White);  
9.  tb.HorizontalAlignment = HorizontalAlignment.Center;  
10.  tb.FontSize = 15;  
11.  b.Child = tb;  
12.   
13.  ElementLayer.SetEnvelope(b, new Envelope(new MapPoint(double.Parse(item.Latitute.ToString().Trim(),new MapPoint(double.Parse(item.Latitute.ToString().Trim(), System.Globalization.CultureInfo.InvariantCulture))));  
14.  elementLayer.Children.Add(b);  

//动态添加带背景颜色的文字信息
 Border b = new Border();
 b.Background = new SolidColorBrush(Colors.Blue);
 b.Height = 20;
 b.CornerRadius = new CornerRadius(5);
 TextBlock tb = new TextBlock();
 tb.Text = item.ZDMC;
 tb.Foreground = new SolidColorBrush(Colors.White);
 tb.HorizontalAlignment = HorizontalAlignment.Center;
 tb.FontSize = 15;
 b.Child = tb;

 ElementLayer.SetEnvelope(b,new Envelope(new MapPoint(double.Parse(item.Latitute.ToString().Trim(),new MapPoint(double.Parse(item.Latitute.ToString().Trim(),System.Globalization.CultureInfo.InvariantCulture))));
 elementLayer.Children.Add(b);

效果如下

 

提供第二种方法，使用TextSymbol的模板使用：

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1. <esri:TextSymbol x:Key="SWZTextSymbol">  
2.       <esri:TextSymbol.ControlTemplate>  
3.           <ControlTemplate>  
4.               <Border Background="White" BorderBrush="Black" CornerRadius="5"  BorderThickness="1,1,1">  
5.                   <TextBlock  
6.                       Width="70"  
7.                       FontSize="14"   
8.                       Text="{Binding Attributes[TextSWZMC]}" //注意这里的TextSWZMC，和后台代码中要一致  
9.                       Foreground="Blue"  
10.                       FontFamily="Microsoft YaHei"  
11.                       HorizontalAlignment="Center" />  
12.               </Border>  
13.           </ControlTemplate>  
14.       </esri:TextSymbol.ControlTemplate>  
15.   </esri:TextSymbol>  

          <esri:TextSymbol x:Key="SWZTextSymbol">
                <esri:TextSymbol.ControlTemplate>
                    <ControlTemplate>
                        <Border Background="White" BorderBrush="Black" CornerRadius="5"  BorderThickness="1,1">
                            <TextBlock
                                Width="70"
                                FontSize="14" 
                                Text="{Binding Attributes[TextSWZMC]}" //注意这里的TextSWZMC，和后台代码中要一致
                                Foreground="Blue"
                                FontFamily="Microsoft YaHei"
                                HorizontalAlignment="Center" />
                        </Border>
                    </ControlTemplate>
                </esri:TextSymbol.ControlTemplate>
            </esri:TextSymbol>

 

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1. TextSymbol textSymbol = LayoutRoot.Resources["SWZTextSymbol"] as TextSymbol; //这里和模板的Key名称要一致  
2. textSymbol.OffsetX = 15;  
3. textSymbol.OffsetY = -15;  
4.   
5. Graphic graphicText = new Graphic()  
6.  {  
7.        Geometry = mercator.FromGeographic(new MapPoint(double.Parse(item.Latitute.ToString().Trim(),  
8.        Symbol = textSymbol  
9.  };  
10.  graphicText.Attributes["TextSWZMC"] = item.ZDMC; //注意这里的TextSWZMC，和前台xaml代码中要一致  

  TextSymbol textSymbol = LayoutRoot.Resources["SWZTextSymbol"] as TextSymbol; //这里和模板的Key名称要一致
  textSymbol.OffsetX = 15;
  textSymbol.OffsetY = -15;

  Graphic graphicText = new Graphic()
   {
         Geometry = mercator.FromGeographic(new MapPoint(double.Parse(item.Latitute.ToString().Trim(),Symbol = textSymbol
   };
   graphicText.Attributes["TextSWZMC"] = item.ZDMC; //注意这里的TextSWZMC，和前台xaml代码中要一致

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1. graphicslayer11.Graphics.Add(graphicText);  

@H_343_502@ graphicslayer11.Graphics.Add(graphicText);