ArcEngine查询属性数据表

1实现原理

        使用要素类（IFeatureClass）查询获取游标（IFeatureCursor），遍历游标装载数据到数据表（DataTable）中。

2涉及接口

       IFeatureClass、IFeatureCursor、IQueryfilter

3具体实现

 1 DataTable dt = new DataTable("AttributeTable");
 2 
 3 ILayer layer = this.axMapControl1.get_Layer(0);
 4 IFeatureLayer featureLayer = layer as IFeatureLayer;
 5 IFeatureClass featureClass = featureLayer.FeatureClass;
 6 
 7 for (int i = 0; i < featureClass.Fields.FieldCount; i++)
 8 {
 9     DataColumn dc = new DataColumn();
10     dc.ColumnName = featureClass.Fields.get_Field(i).AliasName;
11     dt.Columns.Add(dc);
12 }
13 
14 IQueryFilter filter = new QueryFilterClass();
15 filter.WhereClause = "";
16 IFeatureCursor featureCursor = featureClass.Search(filter, false);
17 IFeature feature = featureCursor.NextFeature();
18 while (feature != null)
19 {
20     DataRow dr = dt.NewRow();
21     for (int i = 0; i < feature.Fields.FieldCount; i++)
22     {
23         if (feature.Fields.get_Field(i).Type == esriFieldType.esriFieldTypeGeometry)
24         {
25             string geoType;
26             switch (feature.Shape.GeometryType)
27             {
28                 case ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPoint:
29                     geoType = "点";
30                     break;
31                 case ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolygon:
32                     geoType = "面";
33                     break;
34                 case ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolyline:
35                     geoType = "线";
36                     break;
37                 default:
38                     geoType = "未知";
39                     break;
40             }
41             dr[i] = geoType;
42         }
43         else
44         {
45             dr[i] = feature.get_Value(i);
46         }
47     }
48     dt.Rows.Add(dr);
49 
50     feature = featureCursor.NextFeature();
51 }
52 
53 this.dataGridView1.DataSource = dt;