📄 cenvironment.cs
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}
}
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<nSize-1;i++)
{
CalGuassFromLB(pt[i].x, pt[i].y, ref x1, ref y1, nCenterL);
CalGuassFromLB(pt[i+1].x, pt[i+1].y, ref x2, ref y2, nCenterL);
dLength += Math.Sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
}
return dLength;
}
private double CalcArea(MPoint[] pt,int nSize)
{
double dArea = 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<nSize-1;i++)
{
CalGuassFromLB(pt[i].x, pt[i].y, ref x1, ref y1, nCenterL);
CalGuassFromLB(pt[i+1].x, pt[i+1].y, ref x2, ref y2, nCenterL);
dArea += (x2-x1)*(y1+y2)/2;
}
if (dArea < 0)
dArea = 0 - dArea;
return dArea;
}
public double GetLineLength(MapObjects2.Line line)
{
MPoint[] pt;
int nPtCount;
// double dLength;
MapObjects2.Points pts;
pts = (MapObjects2.Points)line.Parts.Item(0);
nPtCount = pts.Count;
if (nPtCount < 2)
return 0.0;
pt = new MPoint[nPtCount];
for (int i = 0; i < nPtCount; i ++)
{
MapObjects2.Point point = (MapObjects2.Point)pts.Item(i);
pt[i] = new MPoint();
pt[i].x = point.X;
pt[i].y = point.Y;
}
return CalcLenght(pt, nPtCount);
}
public double GetPolygonLength(MapObjects2.Polygon poly)
{
MPoint[] pt;
int nPtCount;
MapObjects2.Points pts;
pts = (MapObjects2.Points)poly.Parts.Item(0);
nPtCount = pts.Count;
if (nPtCount < 2)
return 0.0;
pt = new MPoint[nPtCount+1];
for (int i = 0; i < nPtCount; i ++)
{
MapObjects2.Point point = (MapObjects2.Point)pts.Item(i);
pt[i] = new MPoint();
pt[i].x = point.X;
pt[i].y = point.Y;
}
pt[nPtCount] = new MPoint();
pt[nPtCount].x = pt[0].x;
pt[nPtCount].y = pt[0].y;
return CalcLenght(pt, nPtCount+1);
}
public double GetPolygonArea(MapObjects2.Polygon poly)
{
MPoint[] pt;
int nPtCount;
MapObjects2.Points pts;
pts = (MapObjects2.Points)poly.Parts.Item(0);
nPtCount = pts.Count;
if (nPtCount < 3)
return 0.0;
pt = new MPoint[nPtCount+1];
for (int i = 0; i < nPtCount; i ++)
{
MapObjects2.Point point = (MapObjects2.Point)pts.Item(i);
pt[i] = new MPoint();
pt[i].x = point.X;
pt[i].y = point.Y;
}
pt[nPtCount] = new MPoint();
pt[nPtCount].x = pt[0].x;
pt[nPtCount].y = pt[0].y;
return CalcArea(pt, nPtCount+1);
}
private void CreatePolygon(double dCenterX,double dCenterY,double dR,ref MPoint[] pPoints,ref int nSize)
{
long nCenterL = ((long)(dCenterX)/6+1)*6-3;
double ncx=0.0,ncy=0.0;
CalGuassFromLB(dCenterX, dCenterY, ref ncx, ref ncy, nCenterL);
const int nPointNumber = 20;
const double PI = 3.1415926;
pPoints = new MPoint[nPointNumber+1];
double x1,y1;
double x2=0.0,y2=0.0;
for(int i=0;i<nPointNumber;i++)
{
x1 = dCenterX + dR * Math.Cos(2*PI/nPointNumber*i);
y1 = dCenterY + dR * Math.Sin(2*PI/nPointNumber*i);
CalGuassToLB(x1, y1, ref x2, ref y2);
pPoints[i].x = x2;
pPoints[i].y = y2;
}
pPoints[nPointNumber] = pPoints[0];
nSize = nPointNumber + 1;
}
public void CreatePolygon(MapObjects2.Polygon poly, double x, double y, double dLength)
{
MPoint[] pts = null;
int nSize = 0;
CreatePolygon(x,y,dLength,ref pts,ref nSize);
poly.Parts.Count = 1;
MapObjects2.Points points = (MapObjects2.Points)poly.Parts.Item(0);
points.Count = nSize;
for (int i = 0; i < nSize; i ++)
{
points.Item(i).X = pts[i].x;
points.Item(i).Y = pts[i].y;
}
}
public long SearchByDistance(double dX, double dY,double dDistance, System.Windows.Forms.ListBox listBox)
{
bool bClosest = false;
if (dDistance <= 0.0)
{
bClosest = true;
dDistance = 1000000000;
}
listBox.DataSource = null;
listBox.Items.Clear();
for (int i = 0; i < this.m_nLayerNum; i ++)
{
if (this.m_layerInfos[i].bSelected
&& this.m_layerInfos[i].layer.shapeType == MapObjects2.ShapeTypeConstants.moShapeTypePoint)
{
MapObjects2.Recordset rs = null;
string szPlaceName = "";
double dMinDist = -1.0;
double dDist = 0.0;
rs = this.m_layerInfos[i].layer.Records;
if (rs != null)
{
rs.MoveFirst();
while (!rs.EOF)
{
MPoint[] pts=new MPoint[2];
MapObjects2.Point pt;
pt = (MapObjects2.Point)rs.Fields.Item("shape").Value;
pts[0] = new MPoint();
pts[0].x = dX;
pts[0].y = dY;
pts[1] = new MPoint();
pts[1].x = pt.X ;
pts[1].y = pt.Y;
dDist = this.CalcLenght(pts, 2);
if (dDistance >= 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";
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