ArcGIS Engine 10 开发手册(7-10)ArcGIS Engine中简单图的调用

本文介绍使用ArcGIS Engine生成简单图的方法。

ArcGIS Engine生成简单图示例代码

代码如下：

public class SimpleRender

{

  public SimpleRender (AxMapControl pMapcontrol, IFeatureLayer pFtLayer, String Field)

  {

    IGeoFeatureLayer pGeolayer;
    IActiveView pActiveView;

    pGeolayer = pFtLayer as IGeoFeatureLayer;
    pActiveView = pMapcontrol.ActiveView;
    IFillSymbol pFillSymbol;

    ILineSymbol pLineSymbol;

    pFillSymbol = new SimpleFillSymbolClass ();
    pFillSymbol.Color = GetRGBColor (220, 110, 200);
    pLineSymbol = new SimpleLineSymbolClass ();
    pLineSymbol.Color = GetRGBColor (255, 120, 105);
    pLineSymbol.Width = 2;

    pFillSymbol.Outline = pLineSymbol;
    ISimpleRenderer pSimpleRender; //用什么符号渲染 
    pSimpleRender = new SimpleRendererClass ();
    pSimpleRender.Symbol = pFillSymbol as ISymbol;
    pSimpleRender.Description = "China";
    pSimpleRender.Label = "SimpleRender";

    ITransparencyRenderer pTrans;

    pTrans = pSimpleRender as ITransparencyRenderer;
    pTrans.TransparencyField = Field;
    pGeolayer.Renderer = pTrans as IFeatureRenderer;

    pActiveView.PartialRefresh (esriViewDrawPhase.esriViewGeography, null, null);

    //地理图层的渲染对象是一个要素渲染对象,而这个对象是由一些相关对象组成的。

    //属性也是一个对象,说明大对象是由小对象组成的。

  }

  private IRgbColor GetRGBColor (int R, int G, int B) //子类赋给父类

  {

    IRgbColor pRGB;

    pRGB = new RgbColorClass ();
    pRGB.Red = R;

    pRGB.Green = G;
    pRGB.Green = B;
    return pRGB;

  }

}

效果如图

ArcGIS Engine 10 开发手册全集

ArcGIS Engine 10 开发手册全集： ArcGIS Engine 10 开发手册