public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
{
IWindowsFormsEditorService edSvc = (IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService));
if (edSvc != null)
{
OpenFileDialog dlg = new OpenFileDialog();
dlg.Filter = "ESRI Prj File(*.prj)|*.prj";
if (dlg.ShowDialog() == DialogResult.OK)
{
ISpatialReference sf = SpatialReferenceFactory.GetSpatialReferenceByPrjFile(dlg.FileName);
if (sf == null)
{
MsgBox.ShowInfo("文件\"" + dlg.FileName + "\"不是标准的OGC WKT空间参考描述格式。");
return(value);
}
if (sf.ProjectionCoordSystem == null)
{
MsgBox.ShowInfo("您只能选择投影坐标系统。");
return(value);
}
MsgBox.ShowInfo("空间参考设置成功。\n要想生效请先保存地图配置文件(*.mcd),然后重新打开。");
return(sf);
}
}
return(value);
}
protected override void Init()
{
if (_reader == null)
{
BeginRead();
}
string prjFile = Path.Combine(Path.GetDirectoryName(_fileUrl),
Path.GetFileNameWithoutExtension(_fileUrl) + ".prj");
try
{
_spatialRef = SpatialReferenceFactory.GetSpatialReferenceByPrjFile(prjFile);
}
catch (Exception ex)
{
Log.WriterException(ex);
}
_fullEnvelope = _reader.Envelope.Clone() as Envelope;
AdjustZeroWidthEnvelope(_fullEnvelope);
_shapeType = _reader.ShapeType;
_coordType = _spatialRef != null && _spatialRef.ProjectionCoordSystem != null ? enumCoordinateType.Projection : enumCoordinateType.Geographic;
_gridStateIndicator = new GridStateIndicator(_fullEnvelope.Clone() as Envelope, _gridDefinition);
_fullGridCount = _gridStateIndicator.Width * _gridStateIndicator.Height;
_fields = _reader.Fields;
_isInited = true;
}
private void ParseProjectionInfo(string prjFile)
{
try
{
_spatialReference = SpatialReferenceFactory.GetSpatialReferenceByPrjFile(prjFile);
}
catch (Exception ex)
{
Log.WriterException("ShapeFileReader", "ParseProjectionInfo", ex);
}
}
