//加载参与分析的点要素
public static void LoadNANetworkLocations(string strNAClassName,
IFeatureClass inputFC, INAContext m_NAContext, double snapTolerance)
{
//ITable b1 = inputFC as ITable;//将传入的要素类转化为一个Table对象，这个要素类如站点类、障碍点类等。
//int i1 = b1.RowCount(null);//获取行数
INAClass naClass;
INamedSet classes;
classes = m_NAContext.NAClasses; //上下文对象的有关网络分析类的对象集合NamedSet属性
naClass = classes.get_ItemByName(strNAClassName) as INAClass; //通过传入的名称参数，往classes中获取对应的NAClass
naClass.DeleteAllRows(); //删除naClass中的所有要素
INAClassLoader classLoader = new NAClassLoader(); //新建一个NAClassLoader对象
classLoader.Locator = m_NAContext.Locator; //将上下文对象的locator属性赋给classLoader，locator用于确定网络上要加载的要素的位置。
if (snapTolerance > 0)
{
classLoader.Locator.SnapTolerance = snapTolerance; //设置容差
}
classLoader.NAClass = naClass; //给classLoader对象的NAClass属性赋值
//设置字段映射
INAClassFieldMap fieldMap = null;
fieldMap = new NAClassFieldMap();
fieldMap.set_MappedField("FID", "FID"); //set_MappedField方法用于建立源数据到NAClass类的映射
classLoader.FieldMap = fieldMap; //给classLoader对象的FieldMap属性赋值
int rowsIn = 0;
int rowLocated = 0;
IFeatureCursor featureCursor = inputFC.Search(null, true);
classLoader.Load((ICursor)featureCursor, null, ref rowsIn, ref rowLocated);//ref类型关键字表示对于该参数，在函数过程中可以读也可以写，相当于引用传递。引用传递参数允许函数成员更改参数的值，并保持该更改。
((INAContextEdit)m_NAContext).ContextChanged();
}
/// <summary>
/// 加载参与分析的点要素
/// 按住Ctrl点击下行链接[Onclick]查看使用
/// <see cref="WhuGIS.ArcEngineTool.NetworkAnalysis.GetPathSolve.ShortPathSolveCommand.OnClick"/>
/// </summary>
/// <param name="strNAClassName"></param>
/// <param name="inputFC"></param>
/// <param name="m_NAContext"></param>
/// <param name="snapTolerance"></param>
public static void LoadNANetworkLocations(string strNAClassName, IFeatureClass inputFC, INAContext m_NAContext,
double snapTolerance)
{
ITable b1 = inputFC as ITable;
int i1 = b1.RowCount(null);
INAClass naClass;
INamedSet classes;
classes = m_NAContext.NAClasses;
naClass = classes.get_ItemByName(strNAClassName) as INAClass;
ITable b2 = naClass as ITable;
int i2 = b2.RowCount(null);
naClass.DeleteAllRows();
ITable b3 = naClass as ITable;
int i3 = b2.RowCount(null);
INAClassLoader classLoader = new NAClassLoader();
classLoader.Locator = m_NAContext.Locator;
if (snapTolerance > 0)
{
classLoader.Locator.SnapTolerance = snapTolerance; //设置容差
}
classLoader.NAClass = naClass;
//设置字段映射
INAClassFieldMap fieldMap = null;
fieldMap = new NAClassFieldMap();
fieldMap.set_MappedField("FID", "FID");
classLoader.FieldMap = fieldMap;
int rowsIn = 0;
int rowLocated = 0;
IFeatureCursor featureCursor = inputFC.Search(null, true);
classLoader.Load((ICursor)featureCursor, null, ref rowsIn, ref rowLocated);
INAClass na = classLoader.NAClass;
ITable b5 = na as ITable;
int i5 = b2.RowCount(null);
ITable b4 = inputFC as ITable;
int i4 = b1.RowCount(null);
((INAContextEdit)m_NAContext).ContextChanged();
}