Question

请问用C#怎样实现ArcGIS Engine中的撤销功能

//撤消编辑
public void MapUndoEdit(IMap pMap)
{
IEngineEditProperties ep = new EngineEditorClass();
ILayer pCurrentLayer = ep.TargetLayer;
if (pCurrentLayer == null) return;
IFeatureLayer pFeatureLayer = (IFeatureLayer)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)pMap;
pActiveView.Refresh();
}

// 重复
public void MapRedoEdit(IMap pMap)
{
IEngineEditProperties ep = new EngineEditorClass();
ILayer pCurrentLayer = ep.TargetLayer;
if (pCurrentLayer == null) return;
IFeatureLayer pFeatureLayer = (IFeatureLayer)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)pMap;
pActiveView.Refresh();
}
这个该怎么调用啊！

Answer 1

已经过时了，看最新的书吧，这个书做入门不太好，不建议，只能用来做参考书。

追问

难道你是来赚经验值的吗?怎么回答一样.

Answer 2

已经过时了，看最新的书吧，这个书做入门不太好，不建议，只能用来做参考书。

追问

能介绍一下是什么书吗?用这个方法改怎么调用,能告诉我吗?