/// <summary>
/// This function takes the selected features in the map view, finds the first field of type string in the each feature class
/// and modifies the attribute value to a random string.
/// </summary>
/// <returns>Indicator if the edit operation was successful.</returns>
private async Task<bool> PerformAttributeChange()
{
try
{
// retrieve the currently selected features in the map view
var currentSelectedFeatures = await QueuedTask.Run(() =>
{
return MapView.Active.Map.GetSelection();
});
// for each of the map members in the selected layers
foreach (var mapMember in currentSelectedFeatures)
{
var featureLayer = mapMember.Key as BasicFeatureLayer;
// .. get the underlying table
var table = await QueuedTask.Run(() =>
{
return featureLayer.GetTable();
});
// retrieve the first field of type string
var stringField = table.GetFieldByTypeAsync(FieldType.String).Result;
var stringFieldName = stringField != null ? stringField.Name : String.Empty;
// check if the returned string of the field name actually contains something
// meaning if the current MapMember actually contains a field of type string
if (String.IsNullOrEmpty(stringFieldName))
continue;
#region Use edit operations for attribute changes
// create a new edit operation to encapsulate the string field modifications
var modifyStringsOperation = new EditOperation
{
Name = String.Format("Modify string field '{0}' in layer {1}.", stringFieldName, mapMember.Key.Name)
};
ICollection<long> oidSet = new List<long>();
var iCnt = 0;
// with each ObjectID of the selected feature
foreach (var oid in currentSelectedFeatures[mapMember.Key])
{
// set up a new dictionary with fields to modify
var modifiedAttributes = new Dictionary<string, object>
{
// add the name of the string field and the new attribute value to the dictionary
// in this example a random string is used
{stringFieldName, string.Format("Update {0} on: {1:s}", ++iCnt, DateTime.Now)}
};
// put the modify operation on the editor stack
modifyStringsOperation.Modify(mapMember.Key, oid, modifiedAttributes);
oidSet.Add(oid);
}
// execute the modify operation to apply the changes
await modifyStringsOperation.ExecuteAsync();
#endregion
#region Use the feature inspector for attribute changes
#if OrUseThis
// as an alternative approach
// use the feature inspector class
var featureInspector = new Inspector(true);
// fill the feature inspector with the oids from the feature layer
await featureInspector.LoadAsync(mapMember.Key, currentSelectedFeatures[mapMember.Key]);
// change the attribute value for the string field
featureInspector[stringFieldName] = Path.GetRandomFileName().Replace(".", "");
// app. the new values
await featureInspector.ApplyAsync();
#endif
#endregion
}
}
catch (Exception ex)
{
MessageBox.Show("An error occurred while updating attribute column data {0}", ex.ToString());
}
return true;
}
/// <summary>
/// This function takes the selected features in the map view, finds the first field of type string in the each feature class
/// and modifies the attribute value to a random string.
/// </summary>
/// <returns>Indicator if the edit operation was successful.</returns>
private async Task <bool> PerformAttributeChange()
{
try
{
// retrieve the currently selected features in the map view
var currentSelectedFeatures = await QueuedTask.Run(() =>
{
return(MapView.Active.Map.GetSelection());
});
// for each of the map members in the selected layers
foreach (var mapMember in currentSelectedFeatures)
{
var featureLayer = mapMember.Key as BasicFeatureLayer;
// .. get the underlying table
var table = await QueuedTask.Run(() =>
{
return(featureLayer.GetTable());
});
// retrieve the first field of type string
var stringField = table.GetFieldByTypeAsync(FieldType.String).Result;
var stringFieldName = stringField != null ? stringField.Name : String.Empty;
// check if the returned string of the field name actually contains something
// meaning if the current MapMember actually contains a field of type string
if (String.IsNullOrEmpty(stringFieldName))
{
continue;
}
#if notthis
#region Use edit operations for attribute changes
// create a new edit operation to encapsulate the string field modifications
var modifyStringsOperation = new EditOperation
{
Name = String.Format("Modify string field '{0}' in layer {1}.", stringFieldName, mapMember.Key.Name)
};
ICollection <long> oidSet = new List <long>();
var iCnt = 0;
// with each ObjectID of the selected feature
foreach (var oid in currentSelectedFeatures[mapMember.Key])
{
// set up a new dictionary with fields to modify
var modifiedAttributes = new Dictionary <string, object>
{
// add the name of the string field and the new attribute value to the dictionary
// in this example a random string is used
{ stringFieldName, string.Format("Update {0} on: {1:s}", ++iCnt, DateTime.Now) }
};
// put the modify operation on the editor stack
modifyStringsOperation.Modify(mapMember.Key, oid, modifiedAttributes);
oidSet.Add(oid);
}
// execute the modify operation to apply the changes
await modifyStringsOperation.ExecuteAsync();
#endregion
#endif
#region Use the feature inspector for attribute changes
//#if OrUseThis
// as an alternative approach
// use the feature inspector class
var featureInspector = new Inspector(true);
// fill the feature inspector with the oids from the feature layer
await featureInspector.LoadAsync(mapMember.Key, currentSelectedFeatures[mapMember.Key]);
// change the attribute value for the string field
featureInspector[stringFieldName] = Path.GetRandomFileName().Replace(".", "");
// app. the new values
await featureInspector.ApplyAsync();
//#endif
#endregion
}
}
catch (Exception ex)
{
ArcGIS.Desktop.Framework.Dialogs.MessageBox.Show("An error occurred while updating attribute column data {0}", ex.ToString());
}
return(true);
}
