/// <summary>
/// Updates aggregate results.
/// </summary>
/// <param name="grid">The grid control.</param>
/// <param name="aggregateResults">The aggregate result collection.</param>
/// <param name="aggregateDefinitions">The aggregate definition collection.</param>
public static void UpdateAggregates(
GridViewDataControl grid,
AggregateResultCollection aggregateResults,
IList<AggregateDefinition> aggregateDefinitions)
{
if (grid == null)
return;
ProcessAggregateResults(
grid, aggregateResults, aggregateDefinitions);
grid.CalculateAggregates();
}
/// <summary>
/// Adds new functions providing undefined value and invalidates existing functions.
/// </summary>
/// <param name="grid">The grid control.</param>
/// <param name="aggregateDefinitions">The aggregate definition collection.</param>
public static void AddOrInvalidateAggregateFunctions(GridViewDataControl grid, IList<AggregateDefinition> aggregateDefinitions)
{
var resultList = aggregateDefinitions.Select(
aggregateDefinition => new AggregateResult
{
ColumnName = aggregateDefinition.ColumnName,
SummaryType = aggregateDefinition.SummaryType,
Value = Constants.AggregateCalculatingPlaceHolder.ToString()
}).ToList();
var resultCollection = new AggregateResultCollection(resultList);
UpdateAggregates(grid, resultCollection, aggregateDefinitions);
}
/// <summary>
/// Takes an aggregate result and forms or updates the corresponding aggregate function.
/// </summary>
/// <param name="grid">The grid.</param>
/// <param name="resultCollection">The collection of aggregate results.</param>
/// <param name="aggregateDefinitions">The collection of aggregate definitions.</param>
private static void ProcessAggregateResults(GridViewDataControl grid, AggregateResultCollection resultCollection, IList<AggregateDefinition> aggregateDefinitions)
{
if (grid == null ||
resultCollection == null ||
aggregateDefinitions == null)
{
return;
}
foreach (var result in resultCollection)
{
var aggregateDefinition = aggregateDefinitions.FirstOrDefault(
x => x.ColumnName == result.ColumnName && x.SummaryType == result.SummaryType);
if (aggregateDefinition == null)
continue;
var context = grid.DataContext as IHasColumns;
if (context == null)
return;
var columnItem = context.Columns.Where(x => x.Property != null).FirstOrDefault(
x => string.IsNullOrEmpty(x.AdditionalDataPropertyName)
? x.Property.Name == result.ColumnName
: x.AdditionalDataPropertyName == result.ColumnName);
if (columnItem == null)
return;
var gridColumn = grid.Columns[columnItem.FullName];
UpdateAggregationResult(gridColumn, columnItem, aggregateDefinition, result);
}
}