//放大的代码：
private void MapZoomIn(NameValueCollection queryString)
{
mapObj map = Session["MapServer_MAP"] as mapObj;
PointF pointFLeftBottom = new PointF(float.Parse(queryString["Left"]), float.Parse(queryString["Bottom"]));
PointF pointFRightTop = new PointF(float.Parse(queryString["Right"]), float.Parse(queryString["Top"]));
rectObj rect = map.extent;
rectObj rbox = new rectObj(pointFLeftBottom.X,pointFLeftBottom.Y,pointFRightTop.X,pointFRightTop.Y,1);
map.zoomRectangle(rbox, map.width, map.height, rect, null);
Session.Remove("MapServer_MAP");
Session["MapServer_MAP"] = map;
}
//缩小的代码：
private void MapZoomOut(NameValueCollection queryString)
{
mapObj map = Session["MapServer_MAP"] as mapObj;
PointF pointFLeftBottom = new PointF(float.Parse(queryString["Left"]), float.Parse(queryString["Bottom"]));
PointF pointFRightTop = new PointF(float.Parse(queryString["Right"]), float.Parse(queryString["Top"]));
PointF pointFCenter = new PointF((pointFLeftBottom.X + pointFRightTop.X) / 2, (pointFLeftBottom.Y + pointFRightTop.Y) / 2);
double ratio = 0.0;
double ratioX = (pointFRightTop.X - pointFLeftBottom.X) * 1.0 / map.width;
double ratioY = (pointFLeftBottom.Y - pointFRightTop.Y) * 1.0 / map.height;
if (ratioX > ratioY)
{
ratio = ratioX;
}
else
{
ratio = ratioY;
}
map.zoomPoint(-((int)(1 / ratio)), new pointObj(pointFCenter.X, pointFCenter.Y, 0, 0), map.width, map.height, map.extent, null);
rectObj rectExtent = map.extent;
double mapNewCenterX=(pointFCenter.X - 0.0) / map.width * (rectExtent.maxx - rectExtent.minx) + rectExtent.minx;
double mapNewCenterY=(pointFCenter.Y - 0.0) / map.height * (rectExtent.maxy - rectExtent.miny) + rectExtent.miny;
double minx = mapNewCenterX - (rectExtent.maxx - rectExtent.minx) / ratio / 2;
double maxx = mapNewCenterX + (rectExtent.maxx - rectExtent.minx) / ratio / 2;
double miny = mapNewCenterY - (rectExtent.maxy - rectExtent.miny) / ratio / 2;
double maxy = mapNewCenterY + (rectExtent.maxy - rectExtent.miny) / ratio / 2;
rectObj rectNewExtent = new rectObj(minx, miny, maxx, maxy, 0);
Session.Remove("MapServer_MAP");
Session["MapServer_MAP"] = map;
}
//平移的代码：
private void MapPan(NameValueCollection queryString)
{
mapObj map = Session["MapServer_MAP"] as mapObj;
PointF pointFFirst = new PointF(float.Parse(queryString["FirstX"]), float.Parse(queryString["FirstY"]));
PointF pointFSecond = new PointF(float.Parse(queryString["SecondX"]), float.Parse(queryString["SecondY"]));
System.Drawing.PointF pointFCenter = new PointF(map.width / 2 - (pointFSecond.X - pointFFirst.X), map.height / 2 - (pointFSecond.Y - pointFFirst.Y));
map.zoomPoint(1, new pointObj(pointFCenter.X, pointFCenter.Y, 0, 0), map.width, map.height, map.extent, null);
Session.Remove("MapServer_MAP");
Session["MapServer_MAP"] = map;
}
//全图显示的代码：
private void MapFullExtent(NameValueCollection queryString)
{
mapObj map = Session["MapServer_MAP"] as mapObj;
rectObj rectOriginalExtent = Session["MapServer_OriginalExtent"] as rectObj;
map.extent = rectOriginalExtent;
Session.Remove("MapServer_MAP");
Session["MapServer_MAP"] = map;
}
//属性查询的代码：
private void MapAttributeQuery(NameValueCollection queryString, out string responseXML)
{
mapObj map = Session["MapServer_MAP"] as mapObj;
layerObj layer = null;
string layerName = queryString["LayerName"];
string value = queryString["Value"];
layer = map.getLayerByName(layerName);
String attributeQueryString = "((\"[NAME]\" == '" + value + "') AND (\"[SHAPE_Area]\" > " + "'10'" + "))";
Console.WriteLine("queryString="+queryString);
String path = Server.MapPath("");
Console.WriteLine("path: " + path);
layer.status = 1;
layer.queryByAttributes(map, "NAME", attributeQueryString, 1);
layer.open();
resultCacheObj resultCache = layer.getResults();
int numresults=resultCache.numresults;
string imagePath = GenerateMap();
StringBuilder resultsXML = new StringBuilder("");
resultsXML.Append("<?xml version=\"1.0\" encoding=\"utf-8\"?>");
resultsXML.Append("<map>");
resultsXML.Append("<mapInfo>");
resultsXML.Append("<mapPath>");
resultsXML.Append("<![CDATA[");
resultsXML.Append(imagePath);
resultsXML.Append("]]>");
resultsXML.Append("</mapPath>");
resultsXML.Append("</mapInfo>");
for(int j=0; j<numresults; j++)
{
resultCacheMemberObj resultCacheMember=resultCache.getResult(j);
resultCacheMember = layer.getResult(j);
layer.open();
shapeObj shapeResult = new shapeObj((int)MS_SHAPE_TYPE.MS_SHAPE_POLYGON);
layer.getShape(shapeResult, resultCacheMember.tileindex,resultCacheMember.shapeindex);
layer.open();
resultsXML.Append("<feature>");
resultsXML.Append("<objectID>");
resultsXML.Append("<![CDATA[");
resultsXML.Append(shapeResult.getValue(0));
resultsXML.Append("]]>");
resultsXML.Append("</objectID>");
resultsXML.Append("<name>");
resultsXML.Append("<![CDATA[");
resultsXML.Append(shapeResult.getValue(4));
resultsXML.Append("]]>");
resultsXML.Append("</name>");
resultsXML.Append("<area>");
resultsXML.Append("<![CDATA[");
resultsXML.Append(shapeResult.getValue(11));
resultsXML.Append("]]>");
resultsXML.Append("</area>");
resultsXML.Append("</feature>");
}
layer.close();
resultsXML.Append("</map>");
Session.Remove("MapServer_MAP");
Session["MapServer_MAP"] = map;
responseXML = resultsXML.ToString();
}
//空间查询的代码：
private void MapSpatialQuery(NameValueCollection queryString, out string responseXML)
{
mapObj map = Session["MapServer_MAP"] as mapObj;
layerObj layer = null;
for (int i = 0; i < map.numlayers; i++)
{
layer = map.getLayer(i);
layer.opacity = 100;
System.Diagnostics.Debug.WriteLine("LayerName= " + layer.name + " FeatureCount= " + layer.maxfeatures);
layer.status = (int)mapscript.MS_ON;
}
string layerName = queryString["LayerName"];
string value = queryString["Value"];
layer = map.getLayerByName(layerName);
PointF pointFLeftBottom = new PointF(float.Parse(queryString["Left"]), float.Parse(queryString["Bottom"]));
PointF pointFRightTop = new PointF(float.Parse(queryString["Right"]), float.Parse(queryString["Top"]));
pointObj pointMapLeftBottom = Pixel2Point(map, pointFLeftBottom.X, pointFLeftBottom.Y);
pointObj pointMapRightTop = Pixel2Point(map, pointFRightTop.X, pointFRightTop.Y);
rectObj rectSpatialQuery = new rectObj(pointMapLeftBottom.x, pointMapLeftBottom.y, pointMapRightTop.x, pointMapRightTop.y, 0);
layer.status = (int)mapscript.MS_ON;
layer.queryByRect(map, rectSpatialQuery);
layer.open();
resultCacheObj resultCache = layer.getResults();
int numresults = resultCache.numresults;
string imagePath = GenerateMap();
StringBuilder resultsXML = new StringBuilder("");
resultsXML.Append("<?xml version=\"1.0\" encoding=\"utf-8\"?>");
resultsXML.Append("<map>");
resultsXML.Append("<mapInfo>");
resultsXML.Append("<mapPath>");
resultsXML.Append("<![CDATA[");
resultsXML.Append(imagePath);
resultsXML.Append("]]>");
resultsXML.Append("</mapPath>");
resultsXML.Append("</mapInfo>");
for (int j = 0; j < numresults; j++)
{
resultCacheMemberObj resultCacheMember = resultCache.getResult(j);
resultCacheMember = layer.getResult(j);
layer.open();
shapeObj shapeResult = new shapeObj((int)MS_SHAPE_TYPE.MS_SHAPE_POLYGON);
layer.getShape(shapeResult, resultCacheMember.tileindex, resultCacheMember.shapeindex);
layer.open();
resultsXML.Append("<feature>");
resultsXML.Append("<objectID>");
resultsXML.Append("<![CDATA[");
resultsXML.Append(shapeResult.getValue(0));
resultsXML.Append("]]>");
resultsXML.Append("</objectID>");
resultsXML.Append("<name>");
resultsXML.Append("<![CDATA[");
resultsXML.Append(shapeResult.getValue(4));
resultsXML.Append("]]>");
resultsXML.Append("</name>");
resultsXML.Append("<area>");
resultsXML.Append("<![CDATA[");
resultsXML.Append(shapeResult.getValue(11));
resultsXML.Append("]]>");
resultsXML.Append("</area>");
resultsXML.Append("</feature>");
}
layer.close();
resultsXML.Append("</map>");
Session.Remove("MapServer_MAP");
Session["MapServer_MAP"] = map;
responseXML = resultsXML.ToString();
System.Diagnostics.Debug.WriteLine(responseXML);
}
