public FeatureCursorV3(Dataset dataset, string layerName, IQueryFilter filter)
{
_dataSource = OSGeo_v3.OGR.Ogr.Open(dataset.ConnectionString, 0);
_layer = _dataSource.GetLayerByName(layerName);
if (_layer == null)
{
return;
}
if (filter is ISpatialFilter)
{
IEnvelope env = ((ISpatialFilter)filter).Geometry.Envelope;
_layer.SetSpatialFilterRect(env.minx, env.miny, env.maxx, env.maxy);
if (!String.IsNullOrEmpty(filter.WhereClause))
{
_layer.SetAttributeFilter(filter.WhereClause);
}
}
else
{
string where = filter.WhereClause;
if (String.IsNullOrEmpty(where))
{
where = null;
}
_layer.SetAttributeFilter(where);
}
}
private void btnTestConnecton_Click(object sender, EventArgs e)
{
OSGeo.Initializer.RegisterAll();
if (OSGeo.Initializer.InstalledVersion == OSGeo.GdalVersion.V1)
{
OSGeo_v1.OGR.DataSource dataSource = OSGeo_v1.OGR.Ogr.Open(this.ConnectionString, 0);
if (dataSource != null)
{
StringBuilder sb = new StringBuilder();
for (int i = 0; i < Math.Min(dataSource.GetLayerCount(), 20); i++)
{
OSGeo_v1.OGR.Layer ogrLayer = dataSource.GetLayerByIndex(i);
if (ogrLayer == null)
{
continue;
}
sb.Append("\n" + ogrLayer.GetName());
}
MessageBox.Show("Connection succeeded...\n" + sb.ToString(), "Test Connection", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else
{
MessageBox.Show("Connection failed...", "Test Connection", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
else if (OSGeo.Initializer.InstalledVersion == OSGeo.GdalVersion.V3)
{
OSGeo_v3.OGR.DataSource dataSource = OSGeo_v3.OGR.Ogr.Open(this.ConnectionString, 0);
if (dataSource != null)
{
StringBuilder sb = new StringBuilder();
for (int i = 0; i < Math.Min(dataSource.GetLayerCount(), 20); i++)
{
OSGeo_v3.OGR.Layer ogrLayer = dataSource.GetLayerByIndex(i);
if (ogrLayer == null)
{
continue;
}
sb.Append("\n" + ogrLayer.GetName());
}
MessageBox.Show("Connection succeeded...\n" + sb.ToString(), "Test Connection", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else
{
MessageBox.Show("Connection failed...", "Test Connection", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
}
public void Dispose()
{
try
{
if (_layer != null)
{
_layer.ResetReading();
_layer.Dispose();
_layer = null;
}
if (_dataSource != null)
{
_dataSource.Dispose();
_dataSource = null;
}
}
catch { }
}
