Latest Contributions by MaxMax2

I've noticed that some items in the PROJECT pane has white text on mouse over while others has dark blue text. Looks like a bug.   Also, as you can see, items with dark blue text on hover have different rectangle of highlighting (it is smaller and has margin). Items with artifacts are Save, Save As, Options, Help, Exit. ... View more

Wiki page on the ArcGIS Pro SDK github states that all schema creation and modification operations such as creating tables and feature classes, creating and modifying fields, enabling attachments, and so on, need to be performed using the Geoprocessing API. Now let's imagine that you develop a tool that takes FGDB feature class, does some magic with its features and writes result to shapefile. But you want the output feature class will have exactly the same fields as the input one. OK, you are going to use Create Feature Class geoprocessing tool for that, passing the input feature class as template parameter. But if input fields contains those which name consist of more than 10 characters, you will get an error. Is it possible to take input fields, correct them (or do any other actions) and pass modified fields to the method that creates a feature class? The only workaround I see now is to create feature class without template and then add each field one by one with Add Field geoprocessing tool. But it is obviously bad solution since it is very slow when working with a lot of fields. It is sad to know that DDL in ArcGIS Pro SDK is much less flexible than in ArcObjects ... View more

There are no built-in methods in ArcObjects to perform grouping of rows/features. It is common task in table processing so it is strange to me that this functionality is missed. To implement grouping developers can use at now following approaches: IQueryFilterDefinition.PostfixClause IQueryFilter queryFilter = new QueryFilterClass {     PostfixClause = "GROUP BY SOME_FIELD" }; ICursor cursor = table.Search(queryFilter, true);‍‍‍‍‍‍‍‍‍‍‍‍ But: this works only for GDBs; you need manually determine where current group ends and starts another one (in other words, you need track changings of field's value while iterating by cursor); it is unable to perform custom grouping, for example, based on some spatial criteria. ITableSort You can sort rows with ITableSort and then iterate through records to form groups. But: ITableSort has some limitations: it can't be used to sort tables without an ObjectID field; it can't be used to perform custom sorting based on some spatial criteria. as with first approach you need track changings of field's value while iterating by cursor to determine end of each group. It would be great if you provide a way to group table data in ArcObjects with following key features: iterating by groups, so it will be easy to know their bounds; grouping by multiple fields; support for shapefiles and tables without an ObjectID field; ability to use custom grouping logic. It can be something like that: public class CustomTableGroup : ITableGroupCallBack {     public bool IsNewGroup(int[] fieldIndicies, object[] currentValues, object[] newValues)     {         // determine here if passed newValues start a new group     } } // ... ITableGroup tableGroup = new TableGroupClass {     Table = table,     Fields = "field1, field2, field3",     Group = new CustomTableGroup() }; // ... IGroupCursor groupCursor = null; try {     groupCursor = tableGroup.Group();     for (IGroup group; (group = groupCursor.NextGroup()) != null;)     {         // indices of the fields to group by         int[] fieldIndices = group.FieldIndices;         // values of the fields to group by for the current group         object[] fieldValues = group.FieldValues;         // iterate through the group         ICursor cursor = null;         try         {             cursor = group.Rows;             for (IRow row; (row = cursor.NextRow()) != null;)             {                 // do something             }         }         finally         {             if (cursor != null)                 Marshal.ReleaseComObject(cursor);         }     } } finally {     if (groupCursor != null)         Marshal.ReleaseComObject(groupCursor); } ‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ ... View more

In ArcObjects there is possibility to perform custom sorting using ITableSortCallBack: public class CustomTableSort : ITableSortCallBack {     public int Compare(object value1, object value2, int fieldIndex, int fieldSortIndex)     {         // Do something     } } ITableSort tableSort = new TableSortClass {     Table = ...,     Fields = ...,     Compare = new CustomTableSort() };‍‍‍‍‍‍‍‍‍‍‍‍‍‍ But unfortunately geometries are not passed to the Compare method. So now there is no easy way to perform custom sort by some spatial criteria out-of-the-box. Developers need write their own sorting algorithms since they cannot use built-in ITableSort interface in this case. It would be great if this limitation of the ITableSortCallBack will be removed. ... View more