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;
}
}
}