private void FormXGIS_MouseClick(object sender, MouseEventArgs e)
{
if (layer.FeatureCount() == 0)
{
return;
}
XVertex onevertex = view.ToMapVertex(e.Location);
double mindistance = Double.MaxValue;
int findid = -1;
int index = 0;
foreach (XFeature feature in layer.Features)
{
double distance = feature.Distance(onevertex);
if (distance < mindistance)
{
mindistance = distance;
findid = index;
}
index++;
}
int ScreenDistance = view.ToScreenDistance(mindistance);
if (ScreenDistance < 5)
{
MessageBox.Show("找到的Feature的序号是" + findid);
}
}
void WriteFileHeader(XLayer layer, BinaryWriter bw)
{
MyFileHeader mfh = new MyFileHeader();
mfh.MinX = layer.Extent.GetMinX();
mfh.MinY = layer.Extent.GetMinY();
mfh.MaxX = layer.Extent.GetMaxX();
mfh.MaxY = layer.Extent.GetMaxY();
mfh.FeatureCount = layer.FeatureCount();
mfh.ShapeType = (int)(layer.ShapeType);
mfh.FieldCount = layer.Fields.Count;
bw.Write(XTools.ToBytes(mfh));
}
private void BReadMyFile_Click(object sender, EventArgs e)
{
OpenFileDialog openFileDialog = new OpenFileDialog();
if (openFileDialog.ShowDialog() != DialogResult.OK)
{
return;
}
XMyFile myFile = new XMyFile();
layer = myFile.ReadFile(openFileDialog.FileName);
MessageBox.Show("读入" + layer.FeatureCount() + "个实体");
view.UpdateExtent(layer.Extent);
UpdateMap();
}
public FormAttribute(XLayer _Layer)
{
InitializeComponent();
for (int i = 0; i < _Layer.Fields.Count; i++)
{
dgvAttribute.Columns.Add(_Layer.Fields[i].name, _Layer.Fields[i].name);
}
for (int i = 0; i < _Layer.FeatureCount(); i++)
{
dgvAttribute.Rows.Add();
for (int j = 0; j < _Layer.Fields.Count; j++)
{
dgvAttribute.Rows[i].Cells[j].Value = _Layer.GetFeature(i).GetAttribute(j);
}
}
}
private void BOpenShapeFile_Click(object sender, EventArgs e)
{
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.Filter = "Shapefile文件|*.shp";
openFileDialog.RestoreDirectory = false;
openFileDialog.FilterIndex = 1;
openFileDialog.Multiselect = false;
if (openFileDialog.ShowDialog() != DialogResult.OK)
{
return;
}
XShapeFile sf = new XShapeFile();
layer = sf.ReadShapefile(openFileDialog.FileName);
layer.DrawAttributeOrNot = false;
MessageBox.Show("读入" + layer.FeatureCount() + "个实体");
view.UpdateExtent(layer.Extent);
UpdateMap();
}