[em23]各位大虾请帮忙看看添加临时图层的代码

<P>看我这段增加临时图层的代码，为什么一直提示说没有指定 FileSpec，临时图层不是不需要FileSpec吗？或者谁有添加临时图层的代码给我一份，谢谢</P>
<P>LayerInfo.SetType(miLayerInfoTypeTemp);
VARIANT ParamVt;
ParamVt.vt = VT_BSTR;
ParamVt.bstrVal = m_strRegionLayerName.AllocSysString();
LayerInfo.AddParameter(_T("name"),ParamVt);</P>
<P>CMapXLayer hideLayer = m_ctrlMapX.GetLayers().Item("layer1");</P>
<P>VARIANT Fields;
CMapXFields fields;
VARIANT vtLayer;
vtLayer.vt = VT_DISPATCH;
vtLayer.pdispVal = hideLayer.m_lpDispatch;
CMapXDataset ds = m_ctrlMapX.GetDatasets().Add(miDataSetLayer,vtLayer);
fields = ds.GetFields();
Fields.vt = VT_DISPATCH;
Fields.pdispVal = fields.m_lpDispatch;
LayerInfo.AddParameter(_T("Fields"),Fields);</P>
<P>VARIANT features;
CMapXFeatures newFS = hideLayer.AllFeatures().Clone();
features.vt = VT_DISPATCH;
features.pdispVal = newFS.m_lpDispatch;
LayerInfo.AddParameter(_T("FeatureS"),features);</P>
<P>ParamVt.vt = VT_BSTR;
ParamVt.bstrVal = CString("MemTable").AllocSysString();
LayerInfo.AddParameter(_T("TableStorageType"),ParamVt);</P>
<P>CMapXLayers lys = m_ctrlMapX.GetLayers();</P>
<P>BOOL b = LayerInfo.CreateDispatch(LayerInfo.GetClsid());
CMapXLayer lymem = lys.Add(LayerInfo.m_lpDispatch);
</P>