将图层坐标系转化为当前MapControl中的现有图层坐标系

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);