/// <summary>
/// Conditionally modify attributes as searched in a single pass via client supplied callback.
/// </summary>
/// <param name="sr">ShapeSource for this feature source</param>
/// <param name="envelope">The envelope for vector filtering.</param>
/// <param name="chunkSize">Number of shapes to request from the ShapeSource in each chunk</param>
/// <param name="featureEditCallback">Callback on each feature</param>
protected void SearchAndModifyAttributes(IShapeSource sr, Envelope envelope, int chunkSize, FeatureSourceRowEditEvent featureEditCallback)
{
var samp = new ShapefileFeatureSourceSearchAndModifyAttributeParameters(featureEditCallback);
AttributeTable at = null;
int startIndex = 0;
do
{
samp.CurrentSearchAndModifyAttributeshapes = sr.GetShapes(ref startIndex, chunkSize, envelope);
if (samp.CurrentSearchAndModifyAttributeshapes.Count > 0)
{
if (null == at)
{
at = GetAttributeTable(Filename);
}
at.Edit(samp.CurrentSearchAndModifyAttributeshapes.Keys, samp.OnRowEditEvent);
}
} while (samp.CurrentSearchAndModifyAttributeshapes.Count == chunkSize);
}
/// <summary>
/// Conditionally modify attributes as searched in a single pass via client supplied callback.
/// </summary>
/// <param name="sr">ShapeSource for this feature source</param>
/// <param name="envelope">The envelope for vector filtering.</param>
/// <param name="chunkSize">Number of shapes to request from the ShapeSource in each chunk</param>
/// <param name="featureEditCallback">Callback on each feature</param>
protected void SearchAndModifyAttributes(IShapeSource sr, IEnvelope envelope, int chunkSize, FeatureSourceRowEditEvent featureEditCallback)
{
var samp = new ShapefileFeatureSourceSearchAndModifyAttributeParameters(featureEditCallback);
AttributeTable at = null;
int startIndex = 0;
do
{
samp.CurrentSearchAndModifyAttributeshapes = sr.GetShapes(ref startIndex, chunkSize, envelope);
if (samp.CurrentSearchAndModifyAttributeshapes.Count > 0)
{
if (null == at)
at = GetAttributeTable(Filename);
at.Edit(samp.CurrentSearchAndModifyAttributeshapes.Keys, samp.OnRowEditEvent);
}
} while (samp.CurrentSearchAndModifyAttributeshapes.Count == chunkSize);
}