我有一个数据表zct（区域/多边形坐标表），其列定义为：
private void buildZoneDataTable()
{
// Add columns to the DataTable.
zct.Columns.Add("Zone Name", System.Type.GetType("System.String"));
zct.Columns.Add("X_Coordinate", System.Type.GetType("System.Double"));
zct.Columns.Add("Y_Coordinate", System.Type.GetType("System.Double"));
coordDGV.DataSource = zct;
foreach (DataGridViewColumn dgvcol in coordDGV.Columns)
{
dgvcol.SortMode = DataGridViewColumnSortMode.NotSortable;
}
zct的每一行都是我稍后将呈现的多边形顶点的坐标，但现在我的目标是拥有所有命名区域/多边形及其多边形坐标的嵌套列表。
到目前为止，我已经创建了一个polyzone：
private void BuildZoneList()
{
//iterate through all rows of the zct
for (int i = 0; i < zct.Rows.Count; i++)
{
//if first row, or row I has a different name start new zone
if(i == 0 || zct.Rows[i][0] != zct.Rows[i-1][0])
{
//create new polyzone named by the first column
PolyZone pZone = new PolyZone(zct.Rows[i][0].ToString());
}
}
}
下面是我的polyzone类的一个片段：
public class PolyZone
{
public string polyZoneName;
List<Point3D> pointList = new List<Point3D>(0);
Point3D polyCenter = new Point3D(0,0,0);
public PolyZone(string zoneName)
{
polyZoneName = zoneName;
}
public void add(Point3D point3D)
{
pointList.Append(point3D);
}
请尝试以下操作：
class Program
{
static void Main(string[] args)
{
DataTable zct = new DataTable();
zct.Columns.Add("Zone Name", System.Type.GetType("System.String"));
zct.Columns.Add("X_Coordinate", System.Type.GetType("System.Double"));
zct.Columns.Add("Y_Coordinate", System.Type.GetType("System.Double"));
zct.Columns.Add("Z_Coordinate", System.Type.GetType("System.Double"));
var zones = zct.AsEnumerable().GroupBy(x => x.Field<string>("Zone Name")).ToList();
List<PolyZone> polyZones = new List<PolyZone>();
foreach (var zone in zones)
{
PolyZone newZone = new PolyZone(zone.Key);
polyZones.Add(newZone);
foreach (DataRow row in zone)
{
double x = double.Parse(row.Field<string>("X_Coordinate"));
double y = double.Parse(row.Field<string>("Y_Coordinate"));
double z = double.Parse(row.Field<string>("Z_Coordinate"));
newZone.add(new Point3D(x, y, z));
}
}
}
}
public class PolyZone
{
public string polyZoneName;
List<Point3D> pointList = new List<Point3D>(0);
Point3D polyCenter = new Point3D(0, 0, 0);
public PolyZone(string zoneName)
{
polyZoneName = zoneName;
}
public void add(Point3D point3D)
{
pointList.Add(point3D);
}
}
