arcgis server 9.2代码阅读笔记一：在图层中增加一个点

代码来源 ARCGIS 9.2例子

// Copyright 2006 ESRI
//
// All rights reserved under the copyright laws of the United States
// and applicable international laws, treaties, and conventions.
//
// You may freely redistribute and use this sample code, with or
// without modification, provided you include the original copyright
// notice and use restrictions.
// AUTHER：糊涂虫 2007.9.19
// See use restrictions at /arcgis/developerkit/userestrictions.

using System;
using System.Data;
using System.Configuration;
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;
using ESRI.ArcGIS.ADF.Web.UI.WebControls.Tools;
using ESRI.ArcGIS.ADF.Web.UI.WebControls;
using ESRI.ArcGIS.ADF.ArcGISServer;
using ESRI.ArcGIS.Server;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Geometry;
using ESRI.ArcGIS.esriSystem;
using ESRI.ArcGIS.Display;
using System.Collections;
using ESRI.ArcGIS.ADF.Web.DataSources.ArcGISServer;

public class PointTool : IMapServerToolAction
{
public void ServerAction(ToolEventArgs args)
{
//获得图层控制
ESRI.ArcGIS.ADF.Web.UI.WebControls.Map mapctrl;
mapctrl = (ESRI.ArcGIS.ADF.Web.UI.WebControls.Map) args.Control;
//获得屏幕上点的集合
PointEventArgs pea = (PointEventArgs)args;
System.Drawing.Point screen_point = pea.ScreenPoint;
//获得图层的能力
MapFunctionality mf = (MapFunctionality) mapctrl.GetFunctionality(0);
//获得图层的描述
ESRI.ArcGIS.ADF.ArcGISServer.MapDescription mapDescription = mf.MapDescription;
//把屏幕上的点转换为ADF点
ESRI.ArcGIS.ADF.Web.Geometry.Point adf_map_point = ESRI.ArcGIS.ADF.Web.Geometry.Point.ToMapPoint(screen_point, mapctrl.Extent, mf.DisplaySettings.ImageDescriptor.Width, mf.DisplaySettings.ImageDescriptor.Height);
//定义点对象
PointN ags_map_point = ESRI.ArcGIS.ADF.Web.DataSources.ArcGISServer.Converter.FromAdfPoint(adf_map_point);
//设置点的颜色
ESRI.ArcGIS.ADF.ArcGISServer.RgbColor rgb = new ESRI.ArcGIS.ADF.ArcGISServer.RgbColor();
rgb.Red = 0;
rgb.Green = 255;
rgb.Blue = 0;
rgb.AlphaValue = 255;
//设置点的标识符
ESRI.ArcGIS.ADF.ArcGISServer.SimpleMarkerSymbol sms = new ESRI.ArcGIS.ADF.ArcGISServer.SimpleMarkerSymbol();
sms.Style = ESRI.ArcGIS.ADF.ArcGISServer.esriSimpleMarkerStyle.esriSMSDiamond;
sms.Color = rgb;
sms.Size = 20.0;
//设置点
ESRI.ArcGIS.ADF.ArcGISServer.MarkerElement marker = new ESRI.ArcGIS.ADF.ArcGISServer.MarkerElement();
marker.Symbol = sms;
marker.Point = ags_map_point;

if (mapDescription.CustomGraphics != null)
{
//获得该图层上的所有对象
GraphicElement[] oldges = mapDescription.CustomGraphics;
//对象的个数
int cnt = oldges.Length;
//对象个数加一，并把新的对象（点）放进去
GraphicElement[] newges = new GraphicElement[cnt + 1];
oldges.CopyTo(newges, 0);
newges[cnt] = marker;
mapDescription.CustomGraphics = newges;
}
else
{
GraphicElement[] ges = new GraphicElement[1];
ges[0] = marker;
mapDescription.CustomGraphics = ges;
}

mapctrl.Refresh();
}
}

这是一个在图层中添加点的例子，添加线段 图形和文字的代码基本上和这差不错，自己现在只是一个初学者，我在这里只是抛砖引玉，希望大家能发出更好的博客文章出来，同时支持原创。如有错误请交流jiyanliangcs@163.com。

本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/zhangjie_xiaoke/archive/2008/03/05/2150725.aspx