ArcObjects中的IGeometry转成Json

昨天发了将Json格式的描述转换为Web API中的Geometry，今天发一个将ArcObjects中的IGeometry转成Json。 private string Geometry2Json（IGeometry pGeo）
{ int wkid = pGeo.SpatialReference.FactoryCode;
ESRI.ArcGIS.Geometry.IPoint pPoint = null;
ESRI.ArcGIS.Geometry.IPointCollection pPoints = null;
double x, y;
StringBuilder sb = new StringBuilder（"{"）;
sb.Append（@"""geometries""" + ":{"）; switch （pGeo.GeometryType）
{
#region Point2Json
case ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPoint:
pPoint = pGeo as ESRI.ArcGIS.Geometry.IPoint;
pPoint.QueryCoords（out x, out y）;
string json = @"{""x"":" + x + @",""y"":" + y + @",""spatialReference"":" + @"{""wkid"":" + wkid + "}";
sb.Append（@"""point"":" + json）;

break;
#endregion #region Polyline2Json
case ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolyline:
pPoints = pGeo as ESRI.ArcGIS.Geometry.IPointCollection; IPolyline pPolyline = pGeo as IPolyline; IGeometryCollection pGeoetryCollection = pPolyline as IGeometryCollection; if （pGeoetryCollection.GeometryCount >= 1）
{
sb.Append（@"""paths"":["）;
for （int i = 0; i < pGeoetryCollection.GeometryCount; i++）
{
//paths可能有多个path，而每一个path是多个点，用两个for循环
if （pGeoetryCollection.get_Geometry（i） is IPath）
{
sb.Append（"["）;
pPoints = pGeoetryCollection.get_Geometry（i） as IPointCollection; for （int j = 0; j < pPoints.PointCount;j++ ）
{
pPoint = pPoints.get_Point（j）;
pPoint.QueryCoords（out x, out y）;
sb.Append（"[" + x + "," + y + "],"）;
}
sb.Remove（sb.Length - 1, 1）;
sb.Append（"]"）;
}
}
sb.Append（"]" + @",""spatialReference"":" + @"{""wkid"":" + wkid + "}"）;

}

break; #endregion #region Polygon2Json
case ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolygon:
pPoints = pGeo as ESRI.ArcGIS.Geometry.IPointCollection; IPolygon pPolygon = pGeo as IPolygon; //外环和内环？面的构造比较复杂，在AO中我们可以获取内环和外环，如果注意过在客户端API中的Rings数组，似乎看不出，所以这里我没采用外环和内环的构造方式，但是代码在后面附上。 IGeometryCollection pGeoetryCollection1 = pPolygon as IGeometryCollection; if （pGeoetryCollection1.GeometryCount >=1）
{
sb.Append（@"""rings"":["）;
for （int i = 0; i < pGeoetryCollection1.GeometryCount; i++）
{ if （pGeoetryCollection1.get_Geometry（i） is IRing）
{
sb.Append（"["）;
pPoints = pGeoetryCollection1.get_Geometry（i） as IPointCollection;
for （int j = 0; j < pPoints.PointCount;j++ ）
{

pPoint = pPoints.get_Point（j）;
pPoint.QueryCoords（out x, out y）;
sb.Append（"[" + x + "," + y + "],"）;
} sb.Remove（sb.Length - 1, 1）;
sb.Append（"]"）;
}
}
sb.Append（"]" + @",""spatialReference"":" + @"{""wkid"":" + wkid + "}"）;

}
break;
#endregion
} sb.Append（"}"）; //添加Geometry sb.Append（"}"）; return sb.ToString（）; }下面是获取面的内环和外环的坐标 public void PolygonToString（IPolygon4 polygon） { IGeometryBag exteriorRingGeometryBag = polygon.ExteriorRingBag; IGeometryCollection exteriorRingGeometryCollection = exteriorRingGeometryBag as IGeometryCollection; Trace.WriteLine（"polygon.ExteriorRingCount = "+ exteriorRingGeometryCollection.GeometryCount）; for（int i = 0; i < exteriorRingGeometryCollection.GeometryCount; i++） { Trace.WriteLine（"polygon.ExteriorRing["+ i +"]"）; IGeometry exteriorRingGeometry = exteriorRingGeometryCollection.get_Geometry（i）; IPointCollection exteriorRingPointCollection = exteriorRingGeometry as IPointCollection; for（int j = 0; j < exteriorRingPointCollection.PointCount; j++） { Trace.WriteLine（"Point["+ j +"] = "+ PointToString（exteriorRingPointCollection.get_Point（j）））; } IGeometryBag interiorRingGeometryBag = polygon.get_InteriorRingBag（exteriorRingGeometry as IRing）; IGeometryCollection interiorRingGeometryCollection = interiorRingGeometryBag as IGeometryCollection; Trace.WriteLine（"polygon.InteriorRingCount[exteriorRing"+ i +"] = "+ interiorRingGeometryCollection.GeometryCount）; for（int k = 0; k < interiorRingGeometryCollection.GeometryCount; k++） { Trace.WriteLine（"polygon.InteriorRing["+ k +"]"）; IGeometry interiorRingGeometry = interiorRingGeometryCollection.get_Geometry（k）; IPointCollection interiorRingPointCollection = interiorRingGeometry as IPointCollection; for（int m = 0; m < interiorRingPointCollection.PointCount; m++） { Trace.WriteLine（"Point["+ m +"] = "+ PointToString（interiorRingPointCollection.get_Point（m）））; } } } } private string PointToString（IPoint point） { return（point.X +", "+ point.Y +", "+ point.Z）; }推荐阅读：Struts中异步传送XML和JSON类型的数据 http://www.linuxidc.com/Linux/2013-08/88247.htmLinux下JSON库的编译及代码测试 http://www.linuxidc.com/Linux/2013-03/81607.htmjQuery 获取JSON数据[$.getJSON方法] http://www.linuxidc.com/Linux/2013-03/81673.htm用jQuery以及JSON包将表单数据转为JSON字符串 http://www.linuxidc.com/Linux/2013-01/77560.htm