定制 ArcEngine 要素编辑工具

来自：http://blog.sina.com.cn/s/blog_4d780fc10101d2d5.html

先初步了解到大概用到的下面的接口和类：

IEngineEditor

IEngineEditTask

IEngineEditLayers

IEngineEditEvents

IEngineEditProperties

ControlsEditingSketchToolClass

ControlsEditingEditToolClass

ControlsEditingCopyCommandClass

ControlsEditingPasteCommandClass

ControlsEditingClearCommandClass

现在使用 IEngineEditor、IEngineEditTask、IEngineEditLayers这三个接口，再加上Command命令和Tool可以是实现新建要素、复制、剪切、黏贴、删除、移动要素。

下面说明一下我实现新建图形功能的思路：

1、根据workspace和map开启编辑。

2、设置目标图层。

3、设置编辑操作的任务类型。

4、激活SletchTool，ControlsEditingSketchToolClass。

5、这时就可以在AxMapControl中画图形了。图形的点线面类型，SletchTool工具会根据目标图层的类型自动识别。

使用了全局变量IEngineEditor，保证在其他的模块该变量的值

private IEngineEditor m_EngineEditor = new EngineEditorClass();

private void btnNewFeature_Click(object sender, EventArgs e)

{

if(m_engineEditor.EditState==esriEngineEditState.esriEngineStateNotEditing)

{

//Start editing the workspace of the first feature layer found.

//设置编辑的WorkSpace和编辑对象图层

ILayer currentLayer = mMap.get_Layer(0);

if (currentLayer is IFeatureLayer)

{

IFeatureLayer featureLayer = currentLayer as IFeatureLayer;

IDataset dataset = featureLayer.FeatureClass as IDataset;

IWorkspace workspace = dataset.Workspace;

m_engineEditor.StartEditing(workspace, mMap.Map);

((IEngineEditLayers)m_engineEditor).SetTargetLayer(featureLayer, 0);

SetCurrentTask(ref   m_engineEditor,  "新建要素");

}

}

}

///

/// 设置编辑的任务类型

///

///

/// 自己命名的任务名称

public static void SetCurrentTask(ref IEngineEditor pEngineEditor, string taskName)

{

IEngineEditTask edittask;

if (pEngineEditor.EditState == esriEngineEditState.esriEngineStateEditing)

{

switch (taskName)

{

case "新建要素":

edittask = pEngineEditor.GetTaskByUniqueName("ControlToolsEditing_CreateNewFeatureTask");

if (edittask != null)

{

pEngineEditor.CurrentTask = edittask;

}

break;

case "修改图形":

edittask=pEngineEditor.GetTaskByUniqueName("ReshapePolylineEditTask_Reshape Polyline_CSharp");

if (edittask != null)

{

pEngineEditor.CurrentTask = edittask;

}

break;

case "修改要素":

edittask= pEngineEditor.GetTaskByUniqueName("ControlToolsEditing_ModifyFeatureTask");

if (edittask != null)

{

pEngineEditor.CurrentTask = edittask;

}

break;

}

}

}

删除、复制、黏贴的功能，将m_EngineEditor 置于开启编辑的状态后，直接调用下面的命令就好了

ControlsEditingEditToolClass  //用于选择要素对像

ControlsEditingCopyCommandClass

ControlsEditingPasteCommandClass

ControlsEditingClearCommandClass

撤销和重做的功能

///

/// 撒消编辑

///

/// IMap 地图对象

public void MapUndoEdit(IMap m_pMap)

{

IEngineEditProperties ep = new EngineEditorClass();

ILayer m_pCurrentLayer = ep.TargetLayer;

if (m_pCurrentLayer == null) return;

IFeatureLayer pFeatureLayer = (IFeatureLayer)m_pCurrentLayer;

IDataset pDataset = (IDataset)pFeatureLayer.FeatureClass;

if (pDataset == null) return;

IWorkspaceEdit pWorkspaceEdit = (IWorkspaceEdit)pDataset.Workspace;

bool bHasUndos = false;

pWorkspaceEdit.HasUndos(ref bHasUndos);

if (bHasUndos)

pWorkspaceEdit.UndoEditOperation();

IActiveView pActiveView = (IActiveView)m_pMap;

pActiveView.Refresh();

}

///

/// 重做

///

/// IMap 地图对象

public void MapRedoEdit(IMap m_pMap)

{

IEngineEditProperties ep = new EngineEditorClass();

ILayer m_pCurrentLayer = ep.TargetLayer;

if (m_pCurrentLayer == null) return;

IFeatureLayer pFeatureLayer = (IFeatureLayer)m_pCurrentLayer;

IDataset pDataset = (IDataset)pFeatureLayer.FeatureClass;

if (pDataset == null) return;

IWorkspaceEdit pWorkspaceEdit = (IWorkspaceEdit)pDataset.Workspace;

bool bHasUndos = false;

pWorkspaceEdit.HasUndos(ref bHasUndos);

if (bHasUndos)

pWorkspaceEdit.RedoEditOperation();

IActiveView pActiveView = (IActiveView)m_pMap;

pActiveView.Refresh();

}