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

DataTable dt = new DataTable("AttributeTable");

ILayer layer = this.axMapControl1.get_Layer(0);
IFeatureLayer featureLayer = layer as IFeatureLayer;
IFeatureClass featureClass = featureLayer.FeatureClass;

for (int i = 0; i < featureClass.Fields.FieldCount; i++)
{
    DataColumn dc = new DataColumn();
    dc.ColumnName = featureClass.Fields.get_Field(i).AliasName;
    dt.Columns.Add(dc);
}

IQueryFilter filter = new QueryFilterClass();
filter.WhereClause = "";
IFeatureCursor featureCursor = featureClass.Search(filter, false);
IFeature feature = featureCursor.NextFeature();
while (feature != null)
{
    DataRow dr = dt.NewRow();
    for (int i = 0; i < feature.Fields.FieldCount; i++)
    {
        if (feature.Fields.get_Field(i).Type == esriFieldType.esriFieldTypeGeometry)
        {
            string geoType;
            switch (feature.Shape.GeometryType)
            {
                case ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPoint:
                    geoType = "点";
                    break;
                case ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolygon:
                    geoType = "面";
                    break;
                case ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolyline:
                    geoType = "线";
                    break;
                default:
                    geoType = "未知";
                    break;
            }
            dr[i] = geoType;
        }
        else
        {
            dr[i] = feature.get_Value(i);
        }
    }
    dt.Rows.Add(dr);

    feature = featureCursor.NextFeature();
}

this.dataGridView1.DataSource = dt;