/// <summary>
/// shortest_path����ʹ�õ���Dijkstra�㷨
/// �������ٸĽ����룬ѡ�в�ͬ���㷨ʱ��ʾ��ͬ�IJ������ý���
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnGetSPath_Click(object sender, EventArgs e)
{
string ftablename;
string tablename;
string geoColumn;
string algorithm;
ftablename = layerName + "_newlines";
geoColumn = "geom";
tablename = "";
string start = this.textBoxStartPoint.Text.Trim();
string end = this.textBoxEndPoint.Text.Trim();
algorithm = cbxAlgorithm.SelectedItem.ToString().Trim();
SetRoadLength(ftablename, geoColumn, "2345");
ShortestPath spath = new ShortestPath(postDB);
Timing timeRecorder = new Timing();
switch (algorithm)
{
case "Dijkstra":
timeRecorder.Start();
spath.ComputePath(algorithm,ftablename,start,end);
tablename = layerName + "_dijkstra";
timeRecorder.Stop();
TimeCost = timeRecorder.Result();
break;
case "Astar":
SetCoordinate(ftablename, geoColumn);
timeRecorder.Start();
spath.ComputePath(algorithm, ftablename, start, end);
tablename = layerName + "_astar";
timeRecorder.Stop();
TimeCost = timeRecorder.Result();
break;
case "BdDijkstra":
timeRecorder.Start();
spath.ComputePath(algorithm, ftablename, start, end);
tablename = layerName + "_bddijkstra";
timeRecorder.Stop();
TimeCost = timeRecorder.Result();
break;
case "BdAstar":
SetCoordinate(ftablename, geoColumn);
timeRecorder.Start();
spath.ComputePath(algorithm,ftablename,start,end);
tablename = layerName + "_bdastar";
timeRecorder.Stop();
TimeCost = timeRecorder.Result();
break;
default:
break;
/*
case "ShootingStar":
start = this.txtStartEdge.Text.ToString();
end = this.txtEndEdge.Text.ToString();
SetCoordinate(ftablename, geoColumn);
SetCostColumn(ftablename);
spath.ShootingStar(ftablename, start, end);
tablename = layerName + "_shootingstar";
UpdateShortestResult(ftablename, tablename);
break;
* */
}
this.txtCostTime.Text = TimeCost.ToString();
GvwData.DataSource = GetData(tablename);
}
//private void btnMetisPolygon_Click(object sender, EventArgs e)
//{
// //���ɷ����ĵ����������һ�ַ����Ķ���ν��жԱ�
// string sqlstr, tablename,metisColName,partitionNum,geomTxt,resultTable;
// DataTable tmpdt;
// int pNum;
// tablename=layerName+"_vertex_adjaction";
// metisColName="metispartition_" + algorithmName;
// //metisColName = "metispartition_rb";
// sqlstr = "select count(" + metisColName + ") from " + tablename;
// tmpdt=postDB.DoQueryEx(sqlstr);
// partitionNum = tmpdt.Rows[0]["count"].ToString();
// pNum = int.Parse(partitionNum);
// //��������Ƿ����
// resultTable = layerName + "_polygon_metis_" + algorithmName;
// //resultTable = layerName + "_polygon_metis_rb";
// //gid��Ϊ�����Ƶĵ�ķ������
// sqlstr = "create table " + resultTable + " " + "(gid integer,geom geometry)";
// postDB.CheckCreateTable(resultTable, sqlstr);
// for (int i = 0; i < pNum;i++ )
// {
// sqlstr = "select st_astext(st_convexhull(st_collect(geom))) as geom from " + tablename + " " + "where " + metisColName + "=" + i.ToString();
// tmpdt = postDB.DoQueryEx(sqlstr);
// geomTxt = tmpdt.Rows[0]["geom"].ToString();
// sqlstr = "INSERT INTO" + " " + resultTable + " " + "(gid,geom) values (" + i.ToString() + "," + "st_geomfromtext('" + geomTxt + "', 4326))";
// postDB.ExecNonQuery(sqlstr);
// }
// GvwData.DataSource = GetData(resultTable);
//}
private void btnHierarchyAlgorthm_Click(object sender, EventArgs e)
{
string ftablename, start, end, algorithm, tablename;
ftablename = layerName + "_newlines";
start = this.textBoxStartPoint.Text.Trim();
end = this.textBoxEndPoint.Text.Trim();
algorithm = cbxAlgorithm.SelectedItem.ToString().Trim();
tablename = "";
HierarchyAlgorithms ha = new HierarchyAlgorithms(postDB);
Timing timeRecorder = new Timing();
switch (algorithm)
{
case "Dijkstra":
timeRecorder.Start();
ha.Dijkstra(ftablename, start, end);
tablename = layerName + "_hierarchydijkstra";
timeRecorder.Stop();
TimeCost = timeRecorder.Result();
UpdateShortestResult(ftablename, tablename);
break;
case "Astar":
timeRecorder.Start();
ha.Astar(ftablename, start, end);
tablename = layerName + "_hierarchyastar";
timeRecorder.Stop();
TimeCost = timeRecorder.Result();
UpdateShortestResult(ftablename, tablename);
break;
default:
break;
}
this.txtCostTime.Text = TimeCost.ToString();
GvwData.DataSource = GetData(tablename);
}
private void btnBDAlgorithm_Click(object sender, EventArgs e)
{
string ftablename, start, end, algorithm, tablename, geoColumn;
ftablename = layerName + "_newlines";
start = this.textBoxStartPoint.Text.Trim();
end = this.textBoxEndPoint.Text.Trim();
algorithm = cbxBdAlgorithms.SelectedItem.ToString().Trim();
tablename = "";
geoColumn = "geom";
BiHiAlgorithms bh = new BiHiAlgorithms(postDB);
Timing timeRecorder = new Timing();
switch (algorithm)
{
case "BdDijkstra":
timeRecorder.Start();
bh.ComputePath(algorithm, ftablename, start, end);
tablename = layerName + "_hierarchy_bddijkstra";
timeRecorder.Stop();
TimeCost = timeRecorder.Result();
break;
case "BdAstar":
SetCoordinate(ftablename, geoColumn);
timeRecorder.Start();
bh.ComputePath(algorithm, ftablename, start, end);
tablename = layerName + "_hierarchy_bdastar";
timeRecorder.Stop();
TimeCost = timeRecorder.Result();
break;
default:
break;
}
this.txtCostTime.Text = TimeCost.ToString();
GvwData.DataSource = GetData(tablename);
}
