IFeatureClass pFeatCls = (IFeatureClass)node.Tag;

//统一坐标系

if (pFeatCls != null)

{

if (pMapControl.LayerCount != 0)

{

IGeoDataset feaGeoDs = null;

for (int i = 0; i < pMapControl.LayerCount; i++)

{

IFeatureLayer feaLayer = pMapControl.get_Layer(i) as IFeatureLayer;

if (feaLayer != null)

{

IFeatureClass feaClass = feaLayer.FeatureClass;

feaGeoDs = feaClass as IGeoDataset;

if (feaGeoDs != null)

{

break;

}

}

}

IGeoDataset pGeoDataset = pFeatCls as IGeoDataset;

IGeoDatasetSchemaEdit pGeoDatasetSchemaEdit = pGeoDataset as IGeoDatasetSchemaEdit;

pGeoDatasetSchemaEdit.AlterSpatialReference(feaGeoDs.SpatialReference);