表达式属性查询对话框（VC)

<P>BOOL CSELDLG::OnInitDialog()
{
CDialog::OnInitDialog();

// TOD Add extra initialization here
CMainFrame* pMainFrame;
pMainFrame=(CMainFrame*)AfxGetApp()->m_pMainWnd;
m_pView=(CMyFirstMapView*)pMainFrame->GetActiveView();
CMoLayers layers(m_pView->m_map1.GetLayers());
int count = layers.GetCount();
for(short i=count-1;i>-1;i--)
{
CMoMapLayer layer(layers.Item(COleVariant(i)));
m_map3.GetLayers().Add(layer);</P>
<P>m_layersel.AddString(layer.GetName());
}
m_layersel.SetWindowText("请选择图层 ");
m_fieldname.SetWindowText("请选择字段");
m_text.SetWindowText("请选择值");
m_oper.SetWindowText("请选择查询方法");
return TRUE; // return TRUE unless you set the focus to a control
// EXCEPTION: OCX Property Pages should return FALSE
}</P>
<P>void CSELDLG::OnSellayer()
{
// TOD Add your control notification handler code here


CString str,str1;
m_layersel.GetWindowText(str);
CMoLayers layers(m_map3.GetLayers());
CMoMapLayer layer(layers.Item(COleVariant(TEXT(str))));
m_sel.SetWindowText("您选择了"+str+"图层");
layername=str;
CMoRecordset recs(layer.GetRecords());
CMoTableDesc tdrecs(recs.GetTableDesc());
int n=tdrecs.GetFieldCount();
m_fieldname.ResetContent();
for(short i=0;i<n;i++)
{
if(tdrecs.GetFieldType(i)<20)
{
str1=tdrecs.GetFieldName(i);
m_fieldname.InsertString(i,str1);
}
}
m_fieldname.SelectString(-1,fieldname);
}</P>
<P>void CSELDLG::Comble3add()
{
m_text.ResetContent();

CString str1;
<A>file://m_fieldname.GetWindowText</A>(str);
CMoMapLayer layer(m_map3.GetLayers().Item(COleVariant(TEXT(layername))));
CMoRecordset recs(layer.GetRecords());
int i=0;
recs.MoveFirst();
while(!recs.GetEof())
{
<A>file://m_text.DeleteString</A>(i);
CString str1=recs.GetFields().Item(COleVariant(TEXT(fieldname))).GetValueAsString();
m_text.InsertString(i,str1);
recs.MoveNext();
i+=1;
}</P>
<P>}</P>
<P>void CSELDLG::OnCloseupFieldname()
{
// TOD Add your control notification handler code here
int nSel;
if((nSel=m_fieldname.GetCurSel())!=CB_ERR)
{
m_fieldname.GetLBText(nSel,fieldname);
}
else
{
m_fieldname.ResetContent();
m_fieldname.AddString(fieldname);
m_fieldname.SelectString(-1,fieldname);
}

Comble3add();
}</P>
<P>void CSELDLG::OnDropdownOper()
{
// TOD Add your control notification handler code here
m_oper.ResetContent();
m_oper.AddString(">");
m_oper.AddString(">=");
m_oper.AddString("=");
m_oper.AddString("<");
m_oper.AddString("<=");
m_oper.AddString("Like");
m_oper.SelectString(-1,opername);
}</P>
<P>void CSELDLG::OnCloseupText()
{
// TOD Add your control notification handler code here
int nSel;
if((nSel=m_text.GetCurSel())!=CB_ERR)
{
m_text.GetLBText(nSel,shujuname);
}
else
{
m_text.ResetContent();
m_text.AddString(shujuname);
m_text.SelectString(-1,shujuname);
}
}</P>
<P>
void CSELDLG::OnChaxun()
{
// TOD Add your control notification handler code here
if(layername=="")
{
MessageBox("select one layer please!");
return;
}
if(fieldname=="")
{
MessageBox("select one field please!");
return;
}

if(shujuname=="")
{
MessageBox("select one value please!");
return;
}
if(opername=="")
{
MessageBox("select one oper please!");
return;
}

CMoMapLayer layer(m_map3.GetLayers().Item(COleVariant(TEXT(layername))));
CMoRecordset recs(layer.GetRecords());
CMoFields fields(recs.GetFields());
afields=fields;
CMoField field(fields.Item(COleVariant(TEXT(fieldname))));
if(field.GetType()==8)
{
expression=fieldname + " " + opername + " " +"'"+shujuname+"'"+" ";
}
else
{
expression=fieldname+""+opername+""+shujuname;
}

CMoRecordset select(layer.SearchExpression(expression));
m_selection=select;
VARIANT va;
VariantInit(;va);
va.vt=VT_NULL;
CMoTrackingLayer tracklayer(m_map3.GetTrackingLayer());
tracklayer.Refresh(true,va);
}</P>
<P>BEGIN_EVENTSINK_MAP(CSELDLG, CDialog)
<A>file://{{</A>AFX_EVENTSINK_MAP(CSELDLG)
ON_EVENT(CSELDLG, IDC_MAP1, 4 /* AfterTrackingLayerDraw */, OnAfterTrackingLayerDrawMap1, VTS_I4)
<A>file://}}</A>AFX_EVENTSINK_MAP
END_EVENTSINK_MAP()</P>
<P>CSELDLG::CSELDLG(CView* pView)
{

}
BOOL CSELDLG::Create()
{
return CDialog::Create(CSELDLG::IDD);
}</P>
<P>
void CSELDLG::OnCloseupOper()
{
// TOD Add your control notification handler code here
int nSel;
if((nSel=m_oper.GetCurSel())!=CB_ERR)
{
m_oper.GetLBText(nSel,opername);
}
else
{
m_oper.ResetContent();
m_oper.AddString(opername);
m_oper.SelectString(-1,opername);
}
}</P>
<P>void CSELDLG::OnAfterTrackingLayerDrawMap1(long hDC)
{
// TOD Add your control notification handler code here
if(LPDISPATCH(m_selection)==0)
return;
CMoSymbol sym;
sym.CreateDispatch(TEXT("MapObjects2.Symbol"));
sym.SetColor(0xFF00FF);

m_selection.MoveFirst();
sym.SetSymbolType(2);
sym.SetStyle(8);
while(!m_selection.GetEof())
{
CMoFields fields1(m_selection.GetFields());
CMoField field1(fields1.Item(COleVariant(TEXT("Shape"))));
if(afields.Item(COleVariant(TEXT("Shape"))).GetType()==21)
{
CMoPoint point(field1.GetValue().pdispVal);
sym.SetSize(8);
sym.SetStyle(2);
<A>file://m_map3.FlashShape</A>(point,3);
m_map3.DrawShape(point,sym);
}
else if(afields.Item(COleVariant(TEXT("Shape"))).GetType()==23)
{ CMoPolygon shape(field1.GetValue().pdispVal);
<A>file://m_map3.FlashShape</A>(shape,3);
m_map3.DrawShape(shape,sym);
}
else
{
CMoLine line(field1.GetValue().pdispVal);
<A>file://m_map3.FlashShape</A>(line,3);
m_map3.DrawShape(line,sym);
}
m_selection.MoveNext();
}
m_selection=NULL;
}</P>
<P>void CSELDLG::OnChongzhi()
{
// TOD Add your control notification handler code here
m_fieldname.ResetContent();
m_oper.ResetContent();
m_text.ResetContent();
}
</P>

<P><img src="images/post/smile/dvbbs/em01.gif" /></P><P><img src="images/post/smile/dvbbs/em02.gif" /></P>

<img src="images/post/smile/dvbbs/em02.gif" /><img src="images/post/smile/dvbbs/em02.gif" />

<P>好东东啦</P><img src="images/post/smile/dvbbs/em01.gif" />

<img src="images/post/smile/dvbbs/em02.gif" />

有没有C#的啊  哭