在ArcGlobe三维环境中进行数据查询（.net）

来源：互联网发布：移动网络波动怎么解决编辑：程序博客网时间：2024/05/21 04:24

最近在研究ArcGlobe开发，写了个小程序，其中有一个功能是在ArcGlobe中进行数据查询，现在把主要代码贴出来。

/// <summary>
        /// 查询功能
        /// </summary>
        /// <paramname=”sender”></param>
        /// <paramname=”e”></param>
        private void BtnOK_Click(objectsender, EventArgs e)
        {
            try
            {
               //图层名称
               String LayerName = this.CbxLayer.Text;
//查询条件
               String SearchText = this.TbxName.Text;
               if (SearchText == String.Empty)
               {

                   MessageBox.Show(“查询条件不允许为空！”, “错误”, MessageBoxButtons.OK, MessageBoxIcon.Error);
                   TbxName.Focus();
                   //清空数据列表
                   this.dg1.DataSource = null;
                   //跳出查询
                   return;
               }
//当前视图
               IScene scene = this.axGlobeControl1.Globe.GlobeDisplay.Scene;
//查询器
               IQueryFilter pQueryFilter = new QueryFilterClass();
               IActiveView pActiveView;
               pActiveView = (IActiveView)scene;
               //清空当前视图
               scene.ClearSelection();

               IFeatureLayer pFeatureLayer;

               pFeatureLayer = (IFeatureLayer)scene.get_Layer(GetLayerId(LayerName, scene));
               //判断要查询的图层
               if (LayerName == “堤防”)
               {
                   //查询条件
                   pQueryFilter.WhereClause = “XMMC like “%” + SearchText + “%”";

               }
               else if (LayerName == “险工险段”)
               {
                   //查询条件
                   pQueryFilter.WhereClause = “BZ like “%” + SearchText + “%”";

               }
               ……

               IFeatureCursor pFeatureCursor;
               //查询
               pFeatureCursor = pFeatureLayer.FeatureClass.Search(pQueryFilter, false);
               IFeature pFeature;
               pFeature = pFeatureCursor.NextFeature();
               IFields pFields = pFeatureCursor.Fields;

               int fieldIndex = 0;
               int fieldIndexName = 0;
               if (LayerName == “堤防”)
               {
                   fieldIndex = pFields.FindField(“NAME”);
                   fieldIndexName = pFields.FindField(“XMMC”);

               }
               else if (LayerName == “险工险段”)
               {
                   fieldIndex = pFields.FindField(“NAME”);
                   fieldIndexName = pFields.FindField(“BZ”);

               }
               ……
               pfeat = pFeature;

               if (pFeature == null)
               {
                   MessageBox.Show(“您所查询的结果不存在！”);
                   TbxName.Select();
                   TbxName.Focus();
                   this.dg1.DataSource = null;
                   return;
               }
               //绑定DataTable
               DataTable dt = new DataTable();
               DataColumn dc1 = new DataColumn();
               dc1.ColumnName = “工程代码”;
               DataColumn dc2 = new DataColumn();
               dc2.ColumnName = “工程名称”;

dt.Columns.Add(dc1);
dt.Columns.Add(dc2);

               string Code = String.Empty;
               string Name = String.Empty;
               while (pFeature != null)
               {
                   //scene.SelectFeature(pFeatureLayer, pFeature);

                   Code = pFeature.get_Value(fieldIndex) as string;
                   Name = pFeature.get_Value(fieldIndexName) as string;
                   DataRow dr = dt.NewRow();
                   dr[0] = Code;
                   dr[1] = Name;

                   dt.Rows.Add(dr);
                   pFeature = pFeatureCursor.NextFeature();
               }
               //绑定列表
               this.dg1.DataSource = dt.DefaultView;
            }
            catch
            {
               MessageBox.Show(“异常！”, “错误”, MessageBoxButtons.OK, MessageBoxIcon.Error);
               this.dg1.DataSource = null;


            }
        }

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