SharpMap——web 学习笔记

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开篇先说本次的开发环境吧。采用Vs2010，.Net Framework 4.0。

为了更好的调试程序，建议在IIS中进行调试及运行，个人非常不喜欢利用VS自己提供的WebServer去调试程序，而且很多在Web.config中的设置也需要在IIS中才能起到效果！

开发环境我就不要介绍了，先来说说SharpMap的组件要求吧。由于SharpMap的架构一直在变化和改进过程中，因此参考网络上别人的事例代码，你会发现都运行不起来，不是接口没了，就是命名空间变了，这点我也希望SharpMap早日稳定下来。

这次使用的SharpMap的版本是V1.1版本，官方意见提供最新稳定版的下载了，官方网址为：http://sharpmap.codeplex.com/

SharpMap 1.1版本的下载地址为：http://sharpmap.codeplex.com/downloads/get/792797，发布时间为2014年12月11日；该版本只是SharpMap的核心库(Core+UI),下载完后，为了Web开发还必须下载一个Web端的库，本人做完因为这一步走了好多弯路，网络上的教程也没有人写上着一点。在官网的DOWNLOADS节点下有个下载界面，需要下载SharpMap.Web这个组件。

OK!所需库完成后，下面进行Asp.Net的网站开发！你也可以不看下面的代码，直接下载整个网站。解决方案下载地址：http://pan.baidu.com/s/1i3vdUcd

打开VS2010,新建一个网站，新建一个WebForm，我这里命名为“Map.aspx”，下面贴代码：

Map.aspx:地图展示页面：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Map.aspx.cs" Inherits="Map" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head runat="server">    <title>SharpMap测试</title></head><body>    <form id="form1" runat="server">    <div>        <asp:RadioButtonList ID="rblMapTools" runat="server" RepeatDirection="Horizontal">            <asp:ListItem Value="0">Zoom in</asp:ListItem>            <asp:ListItem Value="1">Zoom out</asp:ListItem>            <asp:ListItem Value="2" Selected="True">Pan</asp:ListItem>        </asp:RadioButtonList>        <asp:ImageButton runat="server" Width="700" Height="400" ID="imgMap"             onclick="imgMap_Click" />    </div>    </form></body></html>

Map.aspx.cx:

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;public partial class Map : System.Web.UI.Page{    private SharpMap.Map myMap;    protected void Page_Load(object sender, EventArgs e)    {        myMap = MapHelper.InitializeMap(new System.Drawing.Size((int)imgMap.Width.Value, (int)imgMap.Height.Value));        //SharpMap.Map        if (this.IsPostBack)        {            myMap.Center = (GeoAPI.Geometries.Coordinate)ViewState["mapCenter"];            myMap.Zoom = (double)ViewState["mapZoom"];        }        else        {            this.generateMap();        }    }    protected void imgMap_Click(object sender, ImageClickEventArgs e)    {        myMap.Center = myMap.ImageToWorld(new System.Drawing.Point(e.X, e.Y));        //Set zoom value if any of the zoom tools were selected        if (rblMapTools.SelectedValue == "0") //Zoom in            myMap.Zoom = myMap.Zoom * 0.5;        else if (rblMapTools.SelectedValue == "1") //Zoom out            myMap.Zoom = myMap.Zoom * 2;        //Create the map        this.generateMap();    }    private void generateMap()    {        ViewState.Add("mapCenter", myMap.Center);        ViewState.Add("mapZoom", myMap.Zoom);        //myMap = MapHelper.InitializeMap(new System.Drawing.Size(256, 256));        System.Drawing.Image img = myMap.GetMap();        string imgID = SharpMap.Web.Caching.InsertIntoCache(1, img);        imgMap.ImageUrl = "getmap.aspx?ID=" + HttpUtility.UrlEncode(imgID);    }}

Web.Config配置文件，在.Net 4.0下配置文件

<?xml version="1.0"?><configuration>  <system.web>    <compilation debug="true" targetFramework="4.0" />  </system.web>  <system.webServer>     <modules runAllManagedModulesForAllRequests="true"/>      <handlers>          <add verb="*" name="test" path="GetMap.aspx" type="SharpMap.Web.HttpHandler" preCondition="integratedMode"/>      </handlers>      <validation validateIntegratedModeConfiguration="false" />  </system.webServer></configuration>

MapHelper.cs：

using System;using System.Collections.Generic;using System.Linq;using System.Web;using SharpMap;using System.Drawing;using SharpMap.Layers;using SharpMap.Data.Providers;using SharpMap.Styles;using System.Drawing.Text;using SharpMap.Rendering;using ColorBlend=SharpMap.Rendering.Thematics.ColorBlend;using Point=GeoAPI.Geometries.Coordinate;using System.Drawing.Drawing2D;/// <summary>/// Summary description for MapHelper/// </summary>public class MapHelper{    public MapHelper()    {    }    public static Map InitializeMap(Size size)    {        HttpContext.Current.Trace.Write("Initializing map...");        //Initialize a new map of size 'imagesize'        Map map = new Map(size);        //Set up the countries layer        VectorLayer layCountries = new VectorLayer("Countries");        //Set the datasource to a shapefile in the App_data folder        layCountries.DataSource = new ShapeFile(HttpContext.Current.Server.MapPath(@"~\App_data\countries.shp"), true);        //Set fill-style to green        layCountries.Style.Fill = new SolidBrush(Color.Green);        //Set the polygons to have a black outline        layCountries.Style.Outline = Pens.Black;        layCountries.Style.EnableOutline = true;        layCountries.SRID = 4326;        //Set up a river layer        VectorLayer layRivers = new VectorLayer("Rivers");        //Set the datasource to a shapefile in the App_data folder        layRivers.DataSource = new ShapeFile(HttpContext.Current.Server.MapPath(@"~\App_data\rivers.shp"), true);        //Define a blue 1px wide pen        layRivers.Style.Line = new Pen(Color.Blue, 1);        layRivers.SRID = 4326;        //Set up a river layer        VectorLayer layCities = new VectorLayer("Cities");        //Set the datasource to a shapefile in the App_data folder        layCities.DataSource = new ShapeFile(HttpContext.Current.Server.MapPath(@"~\App_data\cities.shp"), true);        //Define a blue 1px wide pen        //layCities.Style.Symbol = new Bitmap(HttpContext.Current.Server.MapPath(@"~\App_data\Taiyuan\icon.png"));        layCities.Style.SymbolScale = 0.8f;        layCities.MaxVisible = 40;        layCities.SRID = 4326;        //Set up a country label layer        LabelLayer layLabel = new LabelLayer("Country labels");        layLabel.DataSource = layCountries.DataSource;        layLabel.Enabled = true;        layLabel.LabelColumn = "Name";        layLabel.Style = new LabelStyle();        layLabel.Style.ForeColor = Color.White;        layLabel.Style.Font = new Font(FontFamily.GenericSerif, 12);        layLabel.Style.BackColor = new SolidBrush(Color.FromArgb(128, 255, 0, 0));        layLabel.MaxVisible = 90;        layLabel.MinVisible = 30;        layLabel.Style.HorizontalAlignment = LabelStyle.HorizontalAlignmentEnum.Center;        layLabel.SRID = 4326;        layLabel.MultipartGeometryBehaviour = LabelLayer.MultipartGeometryBehaviourEnum.Largest;        //Set up a city label layer        LabelLayer layCityLabel = new LabelLayer("City labels");        layCityLabel.DataSource = layCities.DataSource;        layCityLabel.Enabled = true;        layCityLabel.LabelColumn = "Name";        layCityLabel.Style = new LabelStyle();        layCityLabel.Style.ForeColor = Color.Black;        layCityLabel.Style.Font = new Font(FontFamily.GenericSerif, 11);        layCityLabel.MaxVisible = layLabel.MinVisible;        layCityLabel.Style.HorizontalAlignment = LabelStyle.HorizontalAlignmentEnum.Left;        layCityLabel.Style.VerticalAlignment = LabelStyle.VerticalAlignmentEnum.Bottom;        layCityLabel.Style.Offset = new PointF(3, 3);        layCityLabel.Style.Halo = new Pen(Color.Yellow, 2);        layCityLabel.TextRenderingHint = TextRenderingHint.AntiAlias;        layCityLabel.SmoothingMode = SmoothingMode.AntiAlias;        layCityLabel.SRID = 4326;        layCityLabel.LabelFilter = LabelCollisionDetection.ThoroughCollisionDetection;        layCityLabel.Style.CollisionDetection = true;        //Add the layers to the map object.        //The order we add them in are the order they are drawn, so we add the rivers last to put them on top        map.Layers.Add(layCountries);        map.Layers.Add(layRivers);        map.Layers.Add(layCities);        map.Layers.Add(layLabel);        map.Layers.Add(layCityLabel);        //limit the zoom to 360 degrees width        map.MaximumZoom = 360;        map.BackColor = Color.LightBlue;        map.Zoom = 360;        map.Center = new Point(0, 0);        HttpContext.Current.Trace.Write("Map initialized");        return map;    }    public static Map InitializeTaiyuanMap(Size size)    {        HttpContext.Current.Trace.Write("Initializing map...");        //Initialize a new map of size 'imagesize'        SharpMap.Map map = new SharpMap.Map(size);        //设置太原市区域图层        SharpMap.Layers.VectorLayer layTy = new SharpMap.Layers.VectorLayer("ty");        layTy.DataSource = new SharpMap.Data.Providers.ShapeFile(HttpContext.Current.Server.MapPath(@"~\App_data\Taiyuan\区县级行政区划R.shp"), true);        layTy.Style.Fill = new SolidBrush(Color.FromArgb(242, 239, 233));        layTy.Style.Outline = System.Drawing.Pens.Black;        layTy.Style.EnableOutline = true;        layTy.SRID = 4326;        //设置镇的图层        SharpMap.Layers.VectorLayer layZ = new SharpMap.Layers.VectorLayer("z");        layZ.DataSource = new SharpMap.Data.Providers.ShapeFile(HttpContext.Current.Server.MapPath(@"~\App_data\Taiyuan\镇.shp"), true);        layZ.Style.Fill = new SolidBrush(Color.FromArgb(191, 237, 245));        layZ.Style.Outline = System.Drawing.Pens.Black;        layZ.Style.EnableOutline = true;        layZ.SRID = 4326;        //设置河流的图层        SharpMap.Layers.VectorLayer layHl = new SharpMap.Layers.VectorLayer("Hl");        layHl.DataSource = new SharpMap.Data.Providers.ShapeFile(HttpContext.Current.Server.MapPath(@"~\App_data\Taiyuan\河流湖泊R.shp"), true);        layHl.Style.Fill = new SolidBrush(Color.FromArgb(151, 219, 242));        layHl.Style.Outline = System.Drawing.Pens.Black;        layHl.Style.EnableOutline = true;        layHl.SRID = 4326;        //设置国道的图层        SharpMap.Layers.VectorLayer layGd = new SharpMap.Layers.VectorLayer("gd");        layGd.DataSource = new SharpMap.Data.Providers.ShapeFile(HttpContext.Current.Server.MapPath(@"~\App_data\Taiyuan\国道L.shp"), true);        layGd.Style.Fill = new SolidBrush(Color.FromArgb(255, 254, 169));        layZ.Style.Outline = System.Drawing.Pens.Black;        layZ.Style.EnableOutline = true;        layGd.Style.Line = new Pen(Color.FromArgb(130, 130, 130), 1);        layGd.SRID = 4326;        //Set up the countries layer        SharpMap.Layers.VectorLayer laySd = new SharpMap.Layers.VectorLayer("sd");        //Set the datasource to a shapefile in the App_data folder        laySd.DataSource = new SharpMap.Data.Providers.ShapeFile(HttpContext.Current.Server.MapPath(@"~\App_data\Taiyuan\省道L.shp"), true);        //Set fill-style to green        laySd.Style.Fill = new SolidBrush(Color.FromArgb(255, 254, 169));        //Set the polygons to have a black outline        laySd.Style.Line = new Pen(Color.FromArgb(130, 130, 130), 1);        layZ.Style.Outline = System.Drawing.Pens.Gainsboro;        layZ.Style.EnableOutline = true;        laySd.SRID = 4326;        //Set up a river layer        SharpMap.Layers.VectorLayer layRivers = new SharpMap.Layers.VectorLayer("Rivers");        //Set the datasource to a shapefile in the App_data folder        layRivers.DataSource = new SharpMap.Data.Providers.ShapeFile(HttpContext.Current.Server.MapPath(@"~\App_data\Taiyuan\城市主干道L.shp"), true);        layRivers.Style.Fill = new SolidBrush(Color.FromArgb(255, 254, 169));        //Define a blue 1px wide pen        layRivers.Style.Line = new Pen(Color.FromArgb(130, 130, 130), 1);        layRivers.SRID = 4326;        //Set up a river layer        SharpMap.Layers.VectorLayer layCities = new SharpMap.Layers.VectorLayer("Cities");        //Set the datasource to a shapefile in the App_data folder        layCities.DataSource = new SharpMap.Data.Providers.ShapeFile(HttpContext.Current.Server.MapPath(@"~\App_data\Taiyuan\城市次干道L.shp"), true);        //Define a blue 1px wide pen        //layCities.Style.Symbol = new Bitmap(HttpContext.Current.Server.MapPath(@"~\App_data\Taiyuan\icon.png"));        layCities.Style.SymbolScale = 0.8f;        layCities.MaxVisible = 0.2;        layCities.SRID = 4326;        //Set up a river layer        SharpMap.Layers.VectorLayer layDb = new SharpMap.Layers.VectorLayer("db");        //Set the datasource to a shapefile in the App_data folder        layDb.DataSource = new SharpMap.Data.Providers.ShapeFile(HttpContext.Current.Server.MapPath(@"~\App_data\Taiyuan\基础地标.shp"), true);        //Define a blue 1px wide pen        //layCities.Style.Symbol = new Bitmap(HttpContext.Current.Server.MapPath(@"~\App_data\Taiyuan\icon.png"));        layDb.Style.SymbolScale = 0.8f;        layDb.MaxVisible = 0.05;        layDb.SRID = 4326;        //Set up a 镇 label layer        SharpMap.Layers.LabelLayer layZLabel = new SharpMap.Layers.LabelLayer("tyz labels");        layZLabel.DataSource = layZ.DataSource;        layZLabel.Enabled = true;        layZLabel.LabelColumn = "Name";        layZLabel.Style = new SharpMap.Styles.LabelStyle();        layZLabel.Style.ForeColor = Color.White;        layZLabel.Style.Font = new Font(FontFamily.GenericSerif, 12);        layZLabel.Style.BackColor = new System.Drawing.SolidBrush(Color.Black);        layZLabel.MaxVisible = 0.1;        layZLabel.MinVisible = 0.05;        layZLabel.Style.HorizontalAlignment = SharpMap.Styles.LabelStyle.HorizontalAlignmentEnum.Center;        layZLabel.SRID = 4326;        layZLabel.MultipartGeometryBehaviour = SharpMap.Layers.LabelLayer.MultipartGeometryBehaviourEnum.Largest;        //Set up a city label layer        SharpMap.Layers.LabelLayer layCityLabel = new SharpMap.Layers.LabelLayer("City labels");        layCityLabel.DataSource = layCities.DataSource;        layCityLabel.Enabled = true;        layCityLabel.LabelColumn = "Name";        layCityLabel.Style = new SharpMap.Styles.LabelStyle();        layCityLabel.Style.ForeColor = Color.Black;        layCityLabel.Style.Font = new Font(FontFamily.GenericSerif, 11);        layCityLabel.MaxVisible = layZLabel.MinVisible;        layCityLabel.Style.HorizontalAlignment = SharpMap.Styles.LabelStyle.HorizontalAlignmentEnum.Left;        layCityLabel.Style.VerticalAlignment = SharpMap.Styles.LabelStyle.VerticalAlignmentEnum.Bottom;        layCityLabel.Style.Offset = new PointF(3, 3);        layCityLabel.Style.Halo = new Pen(Color.Yellow, 2);        layCityLabel.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;        layCityLabel.SmoothingMode = SmoothingMode.AntiAlias;        layCityLabel.SRID = 4326;        layCityLabel.LabelFilter = SharpMap.Rendering.LabelCollisionDetection.ThoroughCollisionDetection;        layCityLabel.Style.CollisionDetection = true;        //Set up a city label layer        SharpMap.Layers.LabelLayer layDbLabel = new SharpMap.Layers.LabelLayer("Db labels");        layDbLabel.DataSource = layDb.DataSource;        layDbLabel.Enabled = true;        layDbLabel.LabelColumn = "Name";        layDbLabel.Style = new SharpMap.Styles.LabelStyle();        layDbLabel.Style.ForeColor = Color.Black;        layDbLabel.Style.Font = new Font(FontFamily.GenericSerif, 11);        layDbLabel.MaxVisible = layCityLabel.MinVisible;        layDbLabel.Style.HorizontalAlignment = SharpMap.Styles.LabelStyle.HorizontalAlignmentEnum.Left;        layDbLabel.Style.VerticalAlignment = SharpMap.Styles.LabelStyle.VerticalAlignmentEnum.Bottom;        layDbLabel.Style.Offset = new PointF(3, 3);        layDbLabel.Style.Halo = new Pen(Color.Yellow, 2);        layDbLabel.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;        layDbLabel.SmoothingMode = SmoothingMode.AntiAlias;        layDbLabel.SRID = 4326;        layDbLabel.LabelFilter = SharpMap.Rendering.LabelCollisionDetection.ThoroughCollisionDetection;        layCityLabel.Style.CollisionDetection = true;        //Add the layers to the map object.        //The order we add them in are the order they are drawn, so we add the rivers last to put them on top        map.Layers.Add(layTy);        map.Layers.Add(layHl);        map.Layers.Add(layGd);        map.Layers.Add(laySd);        map.Layers.Add(layRivers);        map.Layers.Add(layCities);        map.Layers.Add(layDb);        map.Layers.Add(layZLabel);        map.Layers.Add(layCityLabel);        map.Layers.Add(layDbLabel);        //limit the zoom to 360 degrees width        map.MaximumZoom = 4;        map.BackColor = Color.White;        map.Zoom = 4;        //map.Center = new SharpMap.Geometries.Point(0, 0);        map.Center = new Point(112.48, 37.86);        HttpContext.Current.Trace.Write("Map initialized");        return map;    }}

原文链接：http://www.cnblogs.com/cehui0303/archive/2015/01/14/4223089.html

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