网络分析系统设计 第2页

基于ARCGIS SERVER的网络分析功能实现及应用
资源配送的实现
资源分配问题，就是将数量一定的资源（如原材料、资金、机器设备、劳动力、食品等）恰当地分配给若干个使用者, 使总的路径值最优
 private void SolveSource()
    { try
        {     //取得网络分析服务
            using (NAServerProxy naServer = NAServerProxy.Create(SERVER_NAME, ROUTE_SERVICE_NAME, null))
            {        if (naServer == null)
throw (new System.Exception("Could not find the web service."));
                //取得网络分析参数
                string[] naLayers = naServer.GetNALayerNames(esriNAServerLayerType.esriNAServerRouteLayer);              NAServerSolverParams solverParams = naServer.GetSolverParameters(naLayers[0]) as NAServerSolverParams;
                //设置网络分析参数
NAServerRouteParams routeParams = solverParams as NAServerRouteParams;
……………
//对起点和终点地理编码
               LoadLocationsSource(solverParams);
                //查找路径
                NAServerSolverResults solverResults;
                solverResults = naServer.Solve(solverParams);
                //显示结果
                OutputSourceResults(solverResults);
            }
        }       
 
1.1.5  道路分析与建议
根据道路的统计数据分析各条道路的现状,以及给行人分析行走路线或者给政府部门进行各种整顿工作.
如下代码是显示道路数据的明细情况:
       string strQuery = "select * from streetculture ";
        DataSet ds = new DataSet();
        OleDbDataAdapter adapter = new OleDbDataAdapter();
        adapter.SelectCommand = new OleDbCommand(strQuery, conn);
        adapter.Fill(ds);
        this.GridView3.DataSource = ds;
        this.GridView3.DataBind();
如下代码是综合得分的代码:
      ………
        while (reader.Read())
        { score[i] = (int)100 - (int)reader.GetValue(1) * 2 - (int)reader.GetValue(2) * 3 - (int)reader.GetValue(3);
            name[i] = (string)reader.GetValue(0);
            i++;
        }
………
}
如下代码是给各个部门的建议:
       ………
string strQuery1 = "select * from streetculture where 堵车次数>10";
        OleDbCommand cmd = new OleDbCommand(strQuery1, conn);
        OleDbDataReader reader = cmd.ExecuteReader();
this.TextBox8.Text = "以下地方请政府部门注意，希望能够加强道路分流";
        while (reader.Read())
        { this.TextBox8.Text += (string)reader.GetValue(0) + ",";}
………
        reader.Close();
        conn.Close();
 
1.2  综合实例的实现
1.2.1  道路通之一：轿车助手
本实例是综合了最优路径查询与设置障碍点, 障碍点可以用户自己设置,可以增加也可以删除.系统默认有四个障碍,列在表中,当用户设置完成后,只要点击确定就可以找到最优路径.其核心代码如下:

 private void SolveCAR()
    {  try
        { //取得网络分析服务
            using (NAServerProxy naServer = NAServerProxy.Create(SERVER_NAME, ROUTE_SERVICE_NAME, null))
            {      if (naServer == null)
throw (new System.Exception("Could not find the web 751com.cn
                //取得网络分析参数
                string[] naLayers = naServer.GetNALayerNames(esriNAServerLayerType.esriNAServerRouteLayer);              NAServerSolverParams solverParams = naServer.GetSolverParameters(naLayers[0]) as NAServerSolverParams;
                //设置网络分析参数
                NAServerRouteParams routeParams = solverParams as NAServerRouteParams;
……………
                //对起点和终点地理编码
LoadLocationsCar(solverParams);
                //查找路径
                NAServerSolverResults solverResults;
                solverResults = naServer.Solve(solverParams);
                //显示结果
                OutputResults(solverResults);
            }
        }  

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