/// <summary>
/// Occurs when this tool is created
/// </summary>
/// <param name="hook">Instance of the application</param>
public override void OnCreate(object hook)
{
try
{
m_hookHelper = new HookHelperClass();
m_hookHelper.Hook = hook;
if (m_hookHelper.ActiveView == null)
{
m_hookHelper = null;
}
}
catch
{
m_hookHelper = null;
}
if (m_hookHelper == null)
{
base.m_enabled = false;
}
else
{
base.m_enabled = true;
}
// TODO: Add other initialization code
pFWorkspace = NetWorkAnalysClass.MemoryWorkspace as IFeatureWorkspace;
//如果未建立FeatureClass 则创建
try
{
inputFClass = pFWorkspace.OpenFeatureClass("Stops");
}
catch (Exception e)
{
inputFClass = NetWorkAnalysClass.CreateFeatureClass(pFWorkspace, "Stops");
}
}
/// <summary>
/// Occurs when this command is clicked
/// </summary>
public override void OnClick()
{
// TODO: Add ShortPathSolveCommand.OnClick implementation
IFeatureWorkspace pFWorkspace = NetWorkAnalysClass.MemoryWorkspace as IFeatureWorkspace;
//networkDataset = NetWorkAnalysClass.OpenPathNetworkDataset("RouteNetwork", "BaseData");
networkDataset = NetWorkAnalysClass.NetWorkDataSet;
//通过网络数据集创建网络分析上下文
m_NAContext = NetWorkAnalysClass.CreatePathSolverContext(networkDataset);
//打开要素数据集
//如果这两个报异常 说明FeatureClass为空 新建
try
{
inputFClass = pFWorkspace.OpenFeatureClass("Stops");
}
catch (Exception e)
{
inputFClass = NetWorkAnalysClass.CreateFeatureClass(pFWorkspace, "Stops");
}
try
{
barriesFClass = pFWorkspace.OpenFeatureClass("Barries");
}
catch (Exception e)
{
barriesFClass = NetWorkAnalysClass.CreateFeatureClass(pFWorkspace, "Barries");
}
if (IfLayerExist("NetworkDataset") == false)
{
ILayer layer;
INetworkLayer networkLayer;
networkLayer = new NetworkLayerClass();
networkLayer.NetworkDataset = networkDataset;
layer = networkLayer as ILayer;
layer.Name = "NetworkDataset";
m_hookHelper.ActiveView.FocusMap.AddLayer(layer);
layer.Visible = false;
}
if (IfLayerExist(m_NAContext.Solver.DisplayName) == true)
{
for (int i = 0; i < m_hookHelper.FocusMap.LayerCount; i++)
{
if (m_hookHelper.FocusMap.get_Layer(i).Name == m_NAContext.Solver.DisplayName)
{
m_hookHelper.FocusMap.DeleteLayer(m_hookHelper.FocusMap.get_Layer(i));
}
}
}
INALayer naLayer = m_NAContext.Solver.CreateLayer(m_NAContext);
ILayer pLayer = naLayer as ILayer;
pLayer.Name = m_NAContext.Solver.DisplayName;
m_hookHelper.ActiveView.FocusMap.AddLayer(pLayer);
if (inputFClass.FeatureCount(null) < 2)
{
MessageBox.Show("站点数过少！");
return;
}
IGPMessages gpMessages = new GPMessagesClass();
//加载站点要素，并设置容差
NetWorkAnalysClass.LoadNANetworkLocations("Stops", inputFClass, m_NAContext, 80);
//加载障碍点要素，并设置容差
NetWorkAnalysClass.LoadNANetworkLocations("Barriers", barriesFClass, m_NAContext, 5);
//创建网络分析对象
INASolver naSolver = m_NAContext.Solver;
try
{
naSolver.Solve(m_NAContext, gpMessages, null);
}
catch (Exception ex)
{
MessageBox.Show("未能找到有效路径" + ex.Message, "提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Warning);
return;
}
for (int i = 0; i < m_hookHelper.FocusMap.LayerCount; i++)
{
if (m_hookHelper.FocusMap.get_Layer(i).Name == m_NAContext.Solver.DisplayName)
{
ICompositeLayer pCompositeLayer = m_hookHelper.FocusMap.get_Layer(i) as ICompositeLayer;
{
for (int t = 0; t < pCompositeLayer.Count; t++)
{
ILayer pResultLayer = pCompositeLayer.get_Layer(t);
if (pResultLayer.Name == "Stops" || pResultLayer.Name == "Barriers")
{
pResultLayer.Visible = false;
continue;
}
}
}
}
}
IGeoDataset geoDataset;
IEnvelope envelope;
geoDataset = m_NAContext.NAClasses.get_ItemByName("Routes") as IGeoDataset;
envelope = geoDataset.Extent;
if (!envelope.IsEmpty)
{
envelope.Expand(1.1, 1.1, true);
}
m_hookHelper.ActiveView.Extent = envelope;
m_hookHelper.ActiveView.Refresh();
}