ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Core.Data Namespace / QueryFilter Class / RowCount Property
Example Version

RowCount Property (QueryFilter)
Gets or sets the limit to the number of rows returned by the query.
Syntax
public int RowCount {get; set;}
Remarks

Some datastores support pagination only through an SQL postfix clause; in these cases, the PostfixClause property should be used in conjunction with RowCount.

In FSDB, if ObjectIDs property is set, the RowCount value will be ignored for the better performance.

Example
Pagination in QueryFilter
public void QueryFilterWithPagination(Table table, List<long> objectIDs)
{
    int rowsPerBatch = 100;
    int offset = 0;

    // Query filter
    // Some datastores support pagination only through an SQL postfix clause
    QueryFilter queryFilter = new QueryFilter()
    {
        ObjectIDs = objectIDs,
        PostfixClause = "ORDER BY OBJECTID"
    };

    // Fetch rows in a batch from a table
    for (int index = offset; index <= objectIDs.Count; index += rowsPerBatch)
    {
        // Set number of rows to return from a table
        queryFilter.RowCount = rowsPerBatch;

        // Set positional offset to skip number of rows from a table 
        queryFilter.Offset = index;

        using (RowCursor cursor = table.Search(queryFilter))
        {
            while (cursor.MoveNext())
            {
                using (Row row = cursor.Current)
                {
                    Console.WriteLine(row.GetObjectID());
                }
            }
        }
    }
}
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3.3 or higher.
See Also