<P> hr = ipEnumGxObject->Reset();<BR> IFeatureLayerPtr ipFeatureLayer(CLSID_FeatureLayer);<BR> <BR> IGxObjectPtr ipObject;<BR> while(!ipEnumGxObject->Next(;ipGxObject))<BR> {<BR>  IGxDatasetPtr ipGxDataset(ipGxObject);<BR>  if(ipGxDataset !=0)<BR>  {<BR>   IDatasetPtr ipDataset;<BR>   hr = ipGxDataset->get_Dataset(;ipDataset);<BR>   if(FAILED(hr))<BR>    return;</P>
<P>   IfeatureClassPtr ipFeatureClass(ipDataset);<BR>   hr = ipFeatureLayer->featurefy_FeatureClass(ipFeatureClass);<BR>   if(FAILED(HR))<BR>    return;</P>
<P>   hr = ipFeatureLayer->put_Visible(VARIANT_TRUE);</P>
<P>   if(FALIED(HR))<BR>    return;</P>
<P>   ILayerPtr ipLayer(ipFeatureLayer);<BR>   hr = m_ipMap->AddLayer(ipLayer);<BR>   if(FALIED(HR))<BR>    return;</P>
<P>  }<BR> }<BR></P>

IEnumGxObjectPtr ipEnumGxObject;<BR> VARIANT_BOOL bResult;<BR> hr = ipGxDialog->DoModalOpen(0,;ipEnumGxObject,;bResult);<BR> if(FAILED(hr)) <BR>  return;

<P>9、代码如下：</P>
<P>HRESULT hr;<BR> IActiveViewPtr ipActiveView(m_ipMap);<BR> IDisplayPtr pDisp(ipActiveView);</P>
<P> IGxDialogPtr ipGxDialog(CLSID_GxDialog);<BR> IGxObjectFilterCollectionPtr pGxObjectFilterCollect(ipGxDialog);<BR> IGxObjectFilterPtr ipGxObjectFilter(CLSID_GxFilterDatasets);<BR> pGxObjectFilterCollect->AddFilter(ipGxObjectFilter,TRUE);<BR> IGxObjectFilterPtr pGxObjectFileter(CLSID_GxFilterFiles);<BR> pGxObjectFilterCollect->AddFilter(pGxObjectFileter,FALSE);<BR> ipGxDialog->put_AllowMultiSelect(VARIANT_TRUE);<BR> ipGxDialog->put_Title(CComBSTR("选择数据"));</P>

<P>7、添加openfile消息函数，在view类里响应就行</P>
<P>8、编辑这个函数代码</P>

<P>6、在OnInitialUpdate()中添加如下代码：</P>
<P>CWnd* pWndCal = GetDlgItem(IDC_MAPCONTROL1);<BR> LPUNKNOWN pUnk = pWndCal->GetControlUnknown();<BR> pUnk->QueryInterface(IID_IMapControl2,(LPVOID*);m_ipMapControl);<BR> m_ipMapControl->get_Map(;m_ipMap);</P>