WmsClient.aspx.cs
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上传日期:2013-11-09
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文件大小:4k
- using System;
- using System.Data;
- using System.Drawing;
- using System.Configuration;
- using System.Collections;
- using System.Web;
- using System.Web.Security;
- using System.Web.UI;
- using System.Web.UI.WebControls;
- using System.Web.UI.WebControls.WebParts;
- using System.Web.UI.HtmlControls;
- public partial class WmsClient : System.Web.UI.Page
- {
- private double Zoom;
- private SharpMap.Geometries.Point Center;
- protected void Page_Load(object sender, EventArgs e)
- {
- if (Page.IsPostBack)
- {
- //Page is post back. Restore center and zoom-values from viewstate
- Center = (SharpMap.Geometries.Point)ViewState["mapCenter"];
- Zoom = (double)ViewState["mapZoom"];
- }
- else
- {
- Center = new SharpMap.Geometries.Point(0,0);
- Zoom = 360;
- //Create the map
- GenerateMap();
- }
- PrintWmsInfo();
- }
- private void PrintWmsInfo()
- {
-
- SharpMap.Layers.WmsLayer layWms = MapHelper.GetWmsLayer();
- //Get request url for WMS
- hlWmsImage.NavigateUrl = layWms.GetRequestUrl(
- new SharpMap.Geometries.BoundingBox(Center.X - Zoom * 0.5, Center.Y - Zoom * 0.25,
- Center.X + Zoom * 0.5, Center.Y + Zoom * 0.25), new Size((int)imgMap.Width.Value, (int)imgMap.Height.Value));
- litLayers.Text = "<p><b>WMS Title</b>: " + layWms.ServiceDescription.Title + "<br/>Abstract: <i>"+layWms.ServiceDescription.Abstract + "</i>";
- litLayers.Text += "<br/><b>WMS Layers:</b><br/>";
-
- foreach (SharpMap.Web.Wms.Client.WmsServerLayer layer in layWms.RootLayer.ChildLayers)
- PrintLayers(layer, layWms);
- litLayers.Text += "</ul></p>";
- }
- /// <summary>
- /// Recursive function for retriving layer names
- /// </summary>
- /// <param name="layer"></param>
- /// <param name="layWms"></param>
- private void PrintLayers(SharpMap.Web.Wms.Client.WmsServerLayer layer, SharpMap.Layers.WmsLayer layWms)
- {
- litLayers.Text += "<li>" + layer.Name;
- if (layWms.LayerList.Contains(layer.Name))
- litLayers.Text += " (Enabled)";
- litLayers.Text += "</li>";
- if (layer.ChildLayers != null && layer.ChildLayers.Length > 0)
- {
- litLayers.Text += "<ul>";
- foreach (SharpMap.Web.Wms.Client.WmsServerLayer childlayer in layer.ChildLayers)
- PrintLayers(childlayer,layWms);
- litLayers.Text += "</ul>";
- }
- }
- protected void imgMap_Click(object sender, ImageClickEventArgs e)
- {
- //Set center of the map to where the client clicked
- //We set up a simple empty map so we can use the ImageToWorld() method for easy conversion from Image to World coordinates
- SharpMap.Map myMap = new SharpMap.Map(new Size(Convert.ToInt32(imgMap.Width.Value), Convert.ToInt32(imgMap.Height.Value)));
- myMap.Center = Center; myMap.Zoom = Zoom;
- 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
- Zoom = Zoom * 0.5;
- else if (rblMapTools.SelectedValue == "1") //Zoom out
- Zoom = Zoom * 2;
- //Create the map
- GenerateMap();
- }
-
- /// <summary>
- /// Creates the map, inserts it into the cache and sets the ImageButton Url
- /// </summary>
- private void GenerateMap()
- {
- //Save the current mapcenter and zoom in the viewstate
- ViewState.Add("mapCenter", Center);
- ViewState.Add("mapZoom", Zoom);
- string ResponseFormat = "maphandler.ashx?MAP=WmsClient&Width=[WIDTH]&Height=[HEIGHT]&Zoom=[ZOOM]&X=[X]&Y=[Y]";
- System.Globalization.NumberFormatInfo numberFormat_EnUS = new System.Globalization.CultureInfo("en-US", false).NumberFormat;
- imgMap.ImageUrl = ResponseFormat.Replace("[WIDTH]", imgMap.Width.Value.ToString()).
- Replace("[HEIGHT]", imgMap.Height.Value.ToString()).
- Replace("[ZOOM]", Zoom.ToString(numberFormat_EnUS)).
- Replace("[X]", Center.X.ToString(numberFormat_EnUS)).
- Replace("[Y]", Center.Y.ToString(numberFormat_EnUS));
- hlCurrentImage.NavigateUrl = imgMap.ImageUrl;
- }
- }