www.pudn.com > C sharp和MapObjects实现.rar > CEnvironment.cs
using System;
using System.Drawing;
namespace MainSystem
{
///
///
///
public struct LayerInfo
{
public string szName;
public string szLayerName;
public string szFileName;
public string szTableName;
public string szFieldName;
public string szType;
public string szSubType; //中类
public string szSubType2; //小类
public string szSubType3;
public bool bCanControl;
public bool bVisible; //可显示状态，只能通过图层控制来改变
public bool bSelected;
public bool bCanSelected; //可选择
public bool bBackground;
public bool bLable;
public double dScale;
public double dShowScale;
public int nCharacterIndex;
public string szFontName;
public int nFontSize;
public int nSymSize;
public uint nSymColor;
public MapObjects2.MapLayer layer;
public MapObjects2.Recordset rsSel;
};
public class MLine
{
public int nPointNumber;
public MPoint[] pPoint;
public MLine()
{
}
};
public class CloestPath
{
public MPoint pt1 = null;
public MPoint pt2 = null;
};
public class MPoint
{
public double x;
public double y;
public MPoint()
{
}
};
public class Buses
{
public int nNum;
public MPoint[] pts;
public Buses()
{
pts = new MPoint[200];
}
}
enum MapOpr {MO_NULL=0,MO_ZOOMIN,MO_ZOOMOUT,MO_ZOOMFULL,MO_PAN,MO_POINTSEL,MO_RECTSEL,MO_CIRCLESEL,MO_POLYGONSEL,MO_INFO,MO_LINEMEAS,MO_POLYMEAS,MO_SEACHBYDIST,MO_CLOSEST};
enum MapDisp {MO_ALL = 0,MO_SCHOOL = 1, MO_TOUR,MO_HOSPITAL,MO_SHOP,MO_HOTEL,MO_GAS,MO_BANK,MO_MOVIE,MO_RESTAURANT,MO_WS,MO_POST,MO_LIBRAY,MO_STATION}
public struct MapInfo
{
public string szName;
public string szMetaTable;
public string szIndexTable;
public string szType;
public MapObjects2.Rectangle rect;
};
public struct IndexInfo
{
public string szName;
public double dX;
public double dY;
public MapObjects2.Rectangle m_extent;
};
public class CEnvironment
{
//常量
public const string BUSLINE_LAYERNAME = "公交线路";
public const string BUSSTATION_LAYERNAME = "公交车站";
public const uint SYMBOL_COLOR_NONE = 9999;
public string m_szDBName = "";
public string m_szSDBPath = "";
public string m_AppPath = "";
public string m_szHelpPath = "";
public MapObjects2.DataConnection m_db = null;
public int m_nCurrMapIndex = -1;
public int m_nMapNum = -1;
public MapInfo[] m_mapInfos = null;
public int m_nLayerNum = -1;
public LayerInfo[] m_layerInfos = null;
public int m_nIndexNum = -1;
public IndexInfo[] m_indexInfos = null;
public MapObjects2.Symbol m_selSymbol = null;
public string m_szfntStation = "";
public char m_chStation = 'a';
public int m_nfntStation = 10;
// public string m_szFontName = "";
public System.Data.DataSet m_dataSet = null;
public long m_x,m_y;
public int m_MapOpr;
public CloestPath m_cloestPath = null;
public double m_dDistance; //最短距离查询
public object m_selectedFeature = null;
public MapObjects2.Symbol m_selectedSymbol = null;
public short m_selectedSymbolSize;
public double m_selectedScale;
public MLine[] m_drawLine = null;
public Buses m_buses = null;
public string m_szBusFilter = "";
public bool m_bPathInit = false;
public CPath m_path;
public string m_szPlaceName = "";
public MapObjects2.Rectangle m_shapeRect;
public MapObjects2.MapLayer m_layerRoad = null;
public CEnvironment()
{
m_MapOpr = (int)MapOpr.MO_NULL;
m_selSymbol = new MapObjects2.Symbol();
m_selSymbol.SymbolType = MapObjects2.SymbolTypeConstants.moPointSymbol;
m_selSymbol.Color = 0xff;
m_path = new CPath();
m_bPathInit = false;
m_cloestPath = new CloestPath();
}
public int GetMapIndex(string szMapName)
{
int nIndex = -1;
for (int i = 0; i < m_nMapNum; i ++)
{
if (szMapName.Equals(m_mapInfos[i].szName))
{
nIndex = i;
break;
}
}
return nIndex;
}
public int GetLayerIndexByName(string szName)
{
int nIndex = -1;
for (int i = 0; i < m_nLayerNum; i ++)
{
if (szName.Equals(this.m_layerInfos[i].szName))
{
nIndex = i;
break;
}
}
return nIndex;
}
///
/// 根据地名得到地名所在的图层名
///
/// string 地名名称
/// string 索引表名称
/// 图层名称
public string GetLayerName(string szName,string szTblName)
{
string szTableName = "";
string strConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + m_szDBName +
";Persist Security Info=False";
System.Data.OleDb.OleDbConnection myConnection = new System.Data.OleDb.OleDbConnection(strConnectionString);
myConnection.Open();
System.Data.DataSet dataSet = new System.Data.DataSet("临时库");
System.Data.OleDb.OleDbDataAdapter myDataAdapter;
string szSQL;
szSQL = "Select * From " + szTblName + " Where 名称 ='"+szName+"'";
myDataAdapter = new System.Data.OleDb.OleDbDataAdapter(szSQL,myConnection);
myDataAdapter.Fill(dataSet,"地名索引");
System.Data.DataTable indexTbl = dataSet.Tables["地名索引"];
System.Data.DataRow[] rowsType = indexTbl.Select();
if (0 == rowsType.Length)
return "";
szTableName = rowsType[0]["图层名"].ToString();
return szTableName;
}
public string GetFieldName(string szName)
{
string szTable = GetTableName(szName,"地名索引");
string szFieldName = "单位名称";
string strConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + m_szDBName +
";Persist Security Info=False";
System.Data.OleDb.OleDbConnection myConnection = new System.Data.OleDb.OleDbConnection(strConnectionString);
myConnection.Open();
System.Data.DataSet dataSet = new System.Data.DataSet("临时库");
System.Data.OleDb.OleDbDataAdapter myDataAdapter;
string szSQL;
szSQL = "Select * From "+ this.m_mapInfos[this.m_nCurrMapIndex].szMetaTable + " Where 属性表名 ='"+szTable+"'";
myDataAdapter = new System.Data.OleDb.OleDbDataAdapter(szSQL,myConnection);
myDataAdapter.Fill(dataSet,"索引");
System.Data.DataTable indexTbl = dataSet.Tables["索引"];
System.Data.DataRow[] rowsType = indexTbl.Select();
if (0 == rowsType.Length)
return szFieldName;
szFieldName = rowsType[0]["字段名"].ToString();
return szFieldName;
}
public string GetTableName(string szName, string szTbleName)
{
string szTableName = "";
string strConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + m_szDBName +
";Persist Security Info=False";
System.Data.OleDb.OleDbConnection myConnection = new System.Data.OleDb.OleDbConnection(strConnectionString);
myConnection.Open();
System.Data.DataSet dataSet = new System.Data.DataSet("临时库");
System.Data.OleDb.OleDbDataAdapter myDataAdapter;
string szSQL;
szSQL = "Select * From " + szTbleName + " Where 名称 ='"+szName+"'";
myDataAdapter = new System.Data.OleDb.OleDbDataAdapter(szSQL,myConnection);
myDataAdapter.Fill(dataSet,"地名索引");
System.Data.DataTable indexTbl = dataSet.Tables["地名索引"];
System.Data.DataRow[] rowsType = indexTbl.Select();
if (0 == rowsType.Length)
return szTableName;
szTableName = rowsType[0]["属性表名"].ToString();
return szTableName;
}
public void ExecuteSpatial(AxMapObjects2.AxMap map,object shape,MapObjects2.SearchMethodConstants sMode,bool bMPoint)
{
for (int i = 0; i < this.m_nLayerNum; i ++)
{
if (bMPoint)
{
double dScale = CalcScale(map);
if (dScale > 8000)
{
dScale = dScale/10000;
dScale = dScale / 5000;
}
else
{
dScale = dScale/10000;
dScale = dScale / 2500;
}
if (m_layerInfos[i].layer.Visible && m_layerInfos[i].bCanSelected)
m_layerInfos[i].rsSel = m_layerInfos[i].layer.SearchByDistance(shape, dScale,"");
else
m_layerInfos[i].rsSel = null;
}
else
{
if (m_layerInfos[i].layer.Visible && m_layerInfos[i].bCanSelected)
m_layerInfos[i].rsSel = m_layerInfos[i].layer.SearchShape(shape, sMode,"");
else
m_layerInfos[i].rsSel = null;
}
}
}
public void ClearSelRsts()
{
for (int i = 0; i < this.m_nLayerNum; i ++)
{
m_layerInfos[i].rsSel = null;
}
}
public void DrawRecordset(AxMapObjects2.AxMap map)
{
for (int i = 0; i < this.m_nLayerNum; i ++)
{
if (m_layerInfos[i].layer.Visible)
{
if (m_layerInfos[i].rsSel != null)
{
MapObjects2.Symbol sym = new MapObjects2.Symbol();
sym.SymbolType = m_layerInfos[i].layer.Symbol.SymbolType;
sym.Style = m_layerInfos[i].layer.Symbol.Style;
sym.Size = m_layerInfos[i].layer.Symbol.Size;
sym.Color = 0xff;
if (m_layerInfos[i].nCharacterIndex >= 0 && m_layerInfos[i].layer.shapeType == MapObjects2.ShapeTypeConstants.moShapeTypePoint )
{
// sym = m_layerInfos[i].layer.Symbol;
// sym.Color = 0xff;
sym.SymbolType = MapObjects2.SymbolTypeConstants.moPointSymbol;
sym.Font.Name = m_layerInfos[i].szFontName;
sym.Style = 4;
sym.Size = m_layerInfos[i].layer.Symbol.Size;
sym.CharacterIndex = (short)m_layerInfos[i].nCharacterIndex;
}
m_layerInfos[i].rsSel.MoveFirst();
while (!m_layerInfos[i].rsSel.EOF)
{
map.DrawShape(m_layerInfos[i].rsSel.Fields.Item("Shape").Value,sym);
m_layerInfos[i].rsSel.MoveNext();
}
}
}
}
}
public void DrawSelectedShape(AxMapObjects2.AxMap map, frmMain frm)
{
MapObjects2.Symbol sym = new MapObjects2.Symbol();
sym.Color = 0xff;
if (this.m_selectedSymbol == null)
map.DrawShape(m_selectedFeature,sym );
else
{
double dScale = this.CalcScale(map);
// if (m_selectedScale > dScale)
{
m_selectedSymbol.Size = frm.ReCalcFontSize(m_selectedSymbolSize,dScale);
map.DrawShape(m_selectedFeature,m_selectedSymbol );
}
}
}
///////////////////////////////////////////////////////////////////
/// 功能：判断图层是否可见
/// 参数：
/// 返回值：
/// ///////////////////////////////////////////////////////////////
public bool GetLayerVisible(int disp)
{
bool bVisible = true;
int nType = 2;
string szSubType = "";
switch ((MapDisp)disp)
{
case MapDisp.MO_ALL:
nType = 1;
break;
case MapDisp.MO_HOSPITAL:
szSubType = "医院";
break;
case MapDisp.MO_SCHOOL:
szSubType = "教育";
break;
case MapDisp.MO_SHOP:
szSubType = "零售";
break;
case MapDisp.MO_TOUR:
szSubType = "旅游";
break;
case MapDisp.MO_GAS:
break;
case MapDisp.MO_HOTEL:
szSubType = "住宿";
break;
case MapDisp.MO_LIBRAY:
szSubType = "图书馆";
nType = 3;
break;
case MapDisp.MO_MOVIE:
szSubType = "影剧院、音乐厅";
nType = 3;
break;
case MapDisp.MO_POST:
szSubType = "邮政";
break;
case MapDisp.MO_RESTAURANT:
szSubType = "餐饮";
break;
case MapDisp.MO_WS:
szSubType = "dddd";
break;
case MapDisp.MO_STATION:
szSubType = "站点";
nType = 4;
break;
}
int nCount = 0;
for (int i = 0; i < this.m_nLayerNum; i ++)
{
if (m_layerInfos[i].bCanControl)
{
switch (nType)
{
case 1:
nCount ++;
if (!m_layerInfos[i].bVisible)
{
return false;
}
break;
case 2:
if (szSubType == m_layerInfos[i].szSubType)
{
nCount ++;
if (!m_layerInfos[i].bVisible)
{
return false;
}
}
break;
case 3:
if (szSubType == m_layerInfos[i].szSubType2)
{
nCount ++;
if (!m_layerInfos[i].bVisible)
{
return false;
}
}
break;
case 4:
if (szSubType == m_layerInfos[i].szSubType3)
{
nCount ++;
if (!m_layerInfos[i].bVisible)
{
return false;
}
}
break;
}
}
}
if (0 == nCount)
bVisible = false;
return bVisible;
}
///////////////////////////////////////////////////////////////////
/// 功能：设置图层是否可见
/// 参数：
/// 返回值：
/// ///////////////////////////////////////////////////////////////
public void SetLayerVisible(int disp, bool bVisible, double dScale)
{
int nType = 2;
string szSubType = "";
switch ((MapDisp)disp)
{
case MapDisp.MO_ALL:
nType = 1;
break;
case MapDisp.MO_HOSPITAL:
szSubType = "医院";
break;
case MapDisp.MO_SCHOOL:
szSubType = "教育";
break;
case MapDisp.MO_SHOP:
szSubType = "零售";
break;
case MapDisp.MO_TOUR:
szSubType = "旅游";
break;
case MapDisp.MO_GAS:
break;
case MapDisp.MO_HOTEL:
szSubType = "住宿";
break;
case MapDisp.MO_LIBRAY:
szSubType = "图书馆";
nType = 3;
break;
case MapDisp.MO_MOVIE:
szSubType = "影剧院、音乐厅";
nType = 3;
break;
case MapDisp.MO_POST:
szSubType = "邮政";
break;
case MapDisp.MO_RESTAURANT:
szSubType = "餐饮";
break;
case MapDisp.MO_WS:
szSubType = "厕所";
break;
case MapDisp.MO_STATION:
szSubType = "站点";
nType = 4;
break;
}
for (int i = 0; i < this.m_nLayerNum; i ++)
{
if (m_layerInfos[i].bCanControl)
{
switch (nType)
{
case 1:
if (!bVisible)
{
m_layerInfos[i].bVisible = bVisible;
m_layerInfos[i].layer.Visible = m_layerInfos[i].bVisible;
}
else
{
m_layerInfos[i].bVisible = bVisible;
if (m_layerInfos[i].dScale > dScale)
m_layerInfos[i].layer.Visible = m_layerInfos[i].bVisible;
}
break;
case 2:
if (szSubType == m_layerInfos[i].szSubType)
{
if (!bVisible)
{
m_layerInfos[i].bVisible = bVisible;
m_layerInfos[i].layer.Visible = m_layerInfos[i].bVisible;
}
else
{
m_layerInfos[i].bVisible = bVisible;
if (m_layerInfos[i].dScale > dScale)
m_layerInfos[i].layer.Visible = m_layerInfos[i].bVisible;
}
}
break;
case 3:
if (szSubType == m_layerInfos[i].szSubType2)
{
if (!bVisible)
{
m_layerInfos[i].bVisible = bVisible;
m_layerInfos[i].layer.Visible = m_layerInfos[i].bVisible;
}
else
{
m_layerInfos[i].bVisible = bVisible;
if (m_layerInfos[i].dScale > dScale)
m_layerInfos[i].layer.Visible = m_layerInfos[i].bVisible;
}
}
break;
case 4:
if (szSubType == m_layerInfos[i].szSubType3)
{
if (!bVisible)
{
m_layerInfos[i].bVisible = bVisible;
m_layerInfos[i].layer.Visible = m_layerInfos[i].bVisible;
}
else
{
m_layerInfos[i].bVisible = bVisible;
if (m_layerInfos[i].dScale > dScale)
m_layerInfos[i].layer.Visible = m_layerInfos[i].bVisible;
}
}
break;
}
}
}
}
private void SubGussFs(ref double X,ref double Y,double B,double L,int nCenterLongi)
{
//高斯投影分带
int nzonenum;
if(nCenterLongi==0)
{
nzonenum = (int)L/6+1;
nCenterLongi = nzonenum*6-3;
}
else
nzonenum = (int)nCenterLongi/6+1;
//以弧度为单位的经纬度数值
double rB = B/180*3.1415926;
double rL = (L-nCenterLongi)/180*3.1415926; //同时计算了中央经线
//1980坐标系参数
const double a = 6378245.00; //长轴
const double b = 6356863.50; //短轴
// const double alpha = 0.0033523299; //扁率
double sqre1 = (a*a-b*b)/(a*a); //第一偏心率平方
// double sqre2 = (a*a-b*b)/(b*b); //第二偏心率平方
//B:纬度
//L:精度
//子午圈曲率半径
double sinb = Math.Sin(rB);
double cosb = Math.Cos(rB);
double M = a*(1-sqre1)/(1-sqre1*sinb*sinb)/Math.Sqrt(1-sqre1*sinb*sinb);
//卯酉圈曲率半径
double N = a/Math.Sqrt(1-sqre1*sinb*sinb);
double sqrita = N/M-1;
//该纬度点到赤道的子午线弧长
double s = a*(1-sqre1)*(1.00505117739*rB-0.00506237764/2*Math.Sin(2*rB)+
0.0000106245/4*Math.Sin(4*rB)-0.00000002081/6*Math.Sin(6*rB));
double tanb = Math.Tan(rB);
X = s+rL*rL*N/2*sinb*cosb+rL*rL*rL*rL*N/24*sinb*cosb*cosb*cosb*(5-tanb*tanb+9*sqrita*sqrita+4*sqrita);
Y = rL*N*cosb+rL*rL*rL*N/6*cosb*cosb*cosb*(1-tanb*tanb+sqrita)+
rL*rL*rL*rL*rL*N/120*cosb*cosb*cosb*cosb*cosb*(5-18*tanb*tanb+tanb*tanb*tanb*tanb);
Y = Y+500000+nzonenum*1.0e+6;
}
private void SubGussFs(double X,double Y,double L0,ref double B,ref double L)
{
double p=57.29577951472;
const double a=6.378245000e+06;
const double e2=0.00669342162297;
const double e12=0.00673852541468;
const double c0=0.157046064172e-06;
const double c1=0.005051773759;
const double c2=0.000029837302;
const double c3=0.000000238189;
double bf0=c0*X;
double bf0c=Math.Cos(bf0);
double bf0s=Math.Sin(bf0);
double bf=bf0+bf0c*(c1*bf0s-c2*Math.Pow(bf0s,3)+c3*Math.Pow(bf0s,5));
double bt=Math.Tan(bf);
double bc=Math.Cos(bf);
double bs=Math.Sin(bf);
double bi=e12*Math.Pow(bc,2);
double v2=1.0e+0+bi;
double bn=a/Math.Sqrt(1.0-e2*Math.Pow(bs,2));
double yn=Y/bn;
/*calculate lantitude b */
double b1=-v2*bt*Math.Pow(yn,2)/2.0;
double b2=-(5.0+3.0*Math.Pow(bt,2)+bi-9.0*bi*Math.Pow(bt,2))*b1*Math.Pow(yn,2)/12.0;
double b3=(61.0+90.0*Math.Pow(bt,2)+45.0*Math.Pow(bt,4))*b1*Math.Pow(yn,4)/360.0;
B = bf+b1+b2+b3;
B = B * p;
/* calculate the longitude l */
double l1=yn/bc;
double l2=-(1.0+2.0*Math.Pow(bt,2)+bi)*l1*Math.Pow(yn,2)/6.0;
double l3=(5.0+28.0*Math.Pow(bt,2)+24.0*Math.Pow(bt,4)+6.0*bi
+8.0*bi*Math.Pow(bt,2))*l1*Math.Pow(yn,4)/120.0;
L=l1+l2+l3;
L=L * p;
L=L + L0;
if(L > 360.0)
L=L - 360.0;
}
private void CalGuassToLB(double dX, double dY, ref double dLongitude, ref double dLatitude)
{
// TODO: Add your dispatch handler code here
double L0;
int nZoonNum;
nZoonNum = (int)(dY/(1.0E+6));
L0 = nZoonNum * 6-3;
dY = dY - nZoonNum*1.0E+6;
SubGussFs(dX,dY-500000,L0,ref dLatitude,ref dLongitude);
dLongitude = dLongitude + nZoonNum*6 - 3 ;
}
private void CalGuassFromLB(double dLongitude, double dLatitude, ref double dX, ref double dY, long nCenterL)
{
// TODO: Add your dispatch handler code here
int CenterL = (int)nCenterL;
SubGussFs(ref dX,ref dY,dLatitude,dLongitude,CenterL);
nCenterL = (long)CenterL;
}
private double CalcLenght(MPoint[] pt,int nSize)
{
double dLength = 0;
double x1=0,x2=0,y1=0,y2=0;
int nCenterL = ((int)(pt[0].x)/6+1)*6-3;
for(int i=0;i= this.CalcLenght(pts, 2))
{
if (bClosest)
{
//查找最近
string szTemp = rs.Fields.Item("名称").Value.ToString();
if (szTemp == "")
continue;
if (((dMinDist < 0) || (dMinDist > dDist)) && (!this.m_szPlaceName.Equals(szTemp)))
{
dMinDist = dDist;
szPlaceName = szTemp;
}
}
else
{
listBox.Items.Add(rs.Fields.Item("名称").Value.ToString());
}
}
rs.MoveNext();
}
if (bClosest && (szPlaceName != "") && (!this.m_szPlaceName.Equals(szPlaceName)) )
listBox.Items.Add(szPlaceName);
}
}
else
{
this.m_layerInfos[i].rsSel = null;
}
}
return listBox.Items.Count;
}
public bool IsImage(string szName)
{
string strConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + m_szDBName +
";Persist Security Info=False";
System.Data.OleDb.OleDbConnection myConnection = new System.Data.OleDb.OleDbConnection(strConnectionString);
myConnection.Open();
System.Data.DataSet dataSet = new System.Data.DataSet("临时库");
System.Data.OleDb.OleDbDataAdapter myDataAdapter;
string szSQL;
szSQL = "Select * From 多媒体索引 Where 名称 ='"+szName+"'";
myDataAdapter = new System.Data.OleDb.OleDbDataAdapter(szSQL,myConnection);
myDataAdapter.Fill(dataSet,"多媒体索引");
System.Data.DataTable indexTbl = dataSet.Tables["多媒体索引"];
System.Data.DataRow[] rowsType = indexTbl.Select();
if (0 == rowsType.Length)
return false;
return true;
}
public MLine CreateLine(MapObjects2.Line moline)
{
MLine line = new MLine();
MapObjects2.Points pts = (MapObjects2.Points)moline.Parts.Item(0);
line.nPointNumber = pts.Count;
line.pPoint = new MPoint[line.nPointNumber];
for (int i = 0; i < line.nPointNumber; i++)
{
MapObjects2.Point pt = (MapObjects2.Point)pts.Item(i);
line.pPoint[i] = new MPoint();
line.pPoint[i].x = pt.X;
line.pPoint[i].y = pt.Y;
}
return line;
}
public MapObjects2.Point GetPoint(string szName)
{
MapObjects2.Point pt = null;
string szLayer = GetLayerName(szName,"地名索引");
string szTable = GetTableName(szName,"地名索引");
if ("" == szTable)
{
return null;
}
int nIndex = GetLayerIndexByName(szTable);
if (nIndex < 0)
return null;
// if (!m_layerInfos[nIndex].layer.Visible)
// {
// return null;
// }
//
MapObjects2.Recordset rs;
rs = m_layerInfos[nIndex].layer.SearchExpression("名称 like '" + szName + "'");
if (rs != null)
{
rs.MoveFirst();
if (!rs.EOF)
{
switch (m_layerInfos[nIndex].layer.shapeType)
{
case MapObjects2.ShapeTypeConstants.moShapeTypePoint:
{
pt = (MapObjects2.Point)rs.Fields.Item("shape").Value;
}
break;
case MapObjects2.ShapeTypeConstants.moShapeTypeLine:
{
MapObjects2.Line line;
line = (MapObjects2.Line)(rs.Fields.Item("shape").Value);
pt = line.Extent.Center;
}
break;
case MapObjects2.ShapeTypeConstants.moShapeTypePolygon:
{
MapObjects2.Polygon poly;
poly = (MapObjects2.Polygon)(rs.Fields.Item("shape").Value);
pt = poly.Extent.Center;
}
break;
}
}
}
return pt;
}
public MapObjects2.Line GetLine(string szName)
{
MapObjects2.Line line = null;
string szLayer = GetLayerName(szName,"地名索引");
string szTable = GetTableName(szName,"地名索引");
if ("" == szTable)
{
return null;
}
int nIndex = GetLayerIndexByName(szTable);
if (nIndex < 0)
return null;
// if (!m_layerInfos[nIndex].layer.Visible)
// {
// return null;
// }
MapObjects2.Recordset rs;
rs = m_layerInfos[nIndex].layer.SearchExpression("名称 like '" + szName + "'");
if (rs != null)
{
rs.MoveFirst();
if (!rs.EOF)
{
switch (m_layerInfos[nIndex].layer.shapeType)
{
case MapObjects2.ShapeTypeConstants.moShapeTypePoint:
return line;
case MapObjects2.ShapeTypeConstants.moShapeTypeLine:
line = (MapObjects2.Line)(rs.Fields.Item("shape").Value);
break;
case MapObjects2.ShapeTypeConstants.moShapeTypePolygon:
return line;
default:
break;
}
}
}
return line;
}
public MPoint FromMapPoint(AxMapObjects2.AxMap map, double x,double y)
{
MPoint pt = new MPoint();
double dW = System.Math.Abs( map.Extent.Right - map.Extent.Left);
double dH = System.Math.Abs(map.Extent.Top-map.Extent.Bottom) ;
double dRatio = 1.0;
double dOrgX=0;
double dOrgY=0;
if(map.Width/dW>map.Height/dH) //横向居中
{
dRatio = map.Height /dH;
dOrgX = (map.Width-dW*dRatio)/2;
}
else if(map.Width/dW 0 车站顺序,否则失败
/// ////////////////////////////////////////////////////////////////////////////////////////////
public int GetStationOrder(string szLineName, string szStationName)
{
string strConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + m_szDBName +
";Persist Security Info=False";
System.Data.OleDb.OleDbConnection myConnection = new System.Data.OleDb.OleDbConnection(strConnectionString);
myConnection.Open();
System.Data.DataSet dataSet = new System.Data.DataSet("临时库");
System.Data.OleDb.OleDbDataAdapter myDataAdapter;
string szSQL;
szSQL = "Select * From 公交车站路线 " + " Where 线路名 ='"+szLineName+"' And 站名 ='"+szStationName+" '";
myDataAdapter = new System.Data.OleDb.OleDbDataAdapter(szSQL,myConnection);
myDataAdapter.Fill(dataSet,"索引");
System.Data.DataTable indexTbl = dataSet.Tables["索引"];
System.Data.DataRow[] rowsType = indexTbl.Select();
if (0 == rowsType.Length)
return -1;
return (int)rowsType[0]["顺序"];
}
}
}