显示栅格图层和矢量图层的属性表（AE开发）

 

显示栅格图层和矢量图层的属性表

 

定义一个函数showAttributeTable（）用于显示栅格图层或矢量数据图层的属性表，其参数pLyr为要显示属性的图层，在程序中添加一个dataGridView控件用于显示属性表。该函数的代码如下：

        private void showAttributeTable(ILayer pLyr)

        {

            if (pLyr is IFeatureLayer)

            {

                DataTable pTable = new DataTable();

                IFeatureLayer pFealyr = pLyr as IFeatureLayer;

                IFeatureClass pFCls = pFealyr.FeatureClass;

                string shape = "";

                if (pFCls.ShapeType == esriGeometryType.esriGeometryPoint)

                    shape = "Point";

                else if (pFCls.ShapeType == esriGeometryType.esriGeometryPolyline)

                    shape = "Polyline";

                else if (pFCls.ShapeType == esriGeometryType.esriGeometryPolygon)

                    shape = "Polygon";

 

                for (int i = 0; i < pFCls.Fields.FieldCount; i++)

                {

                    pTable.Columns.Add(pFCls.Fields.get_Field(i).Name);

                }

                IFeatureCursor pCursor = pFCls.Search(null, false);

                int ishape = pFCls.Fields.FindField("Shape");

                IFeature pFea = pCursor.NextFeature();

                while (pFea != null)

                {

                    DataRow pRow = pTable.NewRow();

                    for (int i = 0; i < pFCls.Fields.FieldCount; i++)

                    {

                        if (i == ishape)

                        {

                            pRow[i] = shape;

                            continue;

                        }

                        pRow[i] = pFea.get_Value(i).ToString();

                    }

                    pTable.Rows.Add(pRow);

                    pFea = pCursor.NextFeature();

                }

                dataGridView1.DataSource = pTable;

            }

            else if (pLyr is IRasterLayer)

            {

                IRasterLayer pRlyr = pLyr as IRasterLayer;

                IRaster pRaster = pRlyr.Raster;

                IRasterProps pProp = pRaster as IRasterProps;

                pProp.PixelType = rstPixelType.PT_LONG;

                if (pProp.PixelType == rstPixelType.PT_LONG)

                {

                    IRasterBandCollection pBcol = pRaster as IRasterBandCollection;

                    IRasterBand pBand = pBcol.Item(0);

                    ITable pRTable = pBand.AttributeTable;

 

                    DataTable pTable = new DataTable();

                    for (int i = 0; i < pRTable.Fields.FieldCount; i++)

                        pTable.Columns.Add(pRTable.Fields.get_Field(i).Name);

 

                    ICursor pCursor = pRTable.Search(null, false);

                    IRow pRrow = pCursor.NextRow();

                    while (pRrow != null)

                    {

                        DataRow pRow = pTable.NewRow();

                        for (int i = 0; i < pRrow.Fields.FieldCount; i++)

                        {

                            pRow[i] = pRrow.get_Value(i).ToString();

                        }

                        pTable.Rows.Add(pRow);

                        pRrow = pCursor.NextRow();

                    }

                    dataGridView1.DataSource = pTable;

                }

            }

}