private void GridViewParts_OnGrouping(object sender, GridViewGroupingEventArgs e)
{
if (e.Action == GroupingEventAction.Place)
{
e.Cancel = true;
var c = (ColumnGroupDescriptor)e.GroupDescriptor;
CountFunction f = new CountFunction();
f.Caption = "Count: ";
GroupDescriptor descriptor = new GroupDescriptor();
descriptor.Member = c.Column.UniqueName;
descriptor.DisplayContent = c.DisplayContent;
descriptor.AggregateFunctions.Add(f);
this.GridViewParts.GroupDescriptors.Add(descriptor);
}
}
public static string GetStringValue(this CountFunction countFunction)
{
switch (countFunction)
{
case CountFunction.Count:
return("count");
case CountFunction.HighCount:
return("high_count");
case CountFunction.LowCount:
return("low_count");
default:
throw new ArgumentOutOfRangeException(nameof(countFunction), countFunction, null);
}
}
public static IEnumerable <decimal> Count(decimal start, decimal step = 1.0m)
{
return(CountFunction.Count(start, x => x + step));
}
public static IEnumerable <double> Count(double start, double step = 1d)
{
return(CountFunction.Count(start, x => x + step));
}
public static IEnumerable <float> Count(float start, float step = 1f)
{
return(CountFunction.Count(start, x => x + step));
}
public static IEnumerable <int> Count(int start, int step = 1)
{
return(CountFunction.Count(start, x => x + step));
}
protected CountDetectorBase(CountFunction function) : base(function.GetStringValue())
{
}
public CountDetectorDescriptor(CountFunction function) : base(function.GetStringValue())
{
}
public void SettingAliasTest(CountFunction column, string expectedAlias) => column.Alias.Should().Be(expectedAlias);
public object Evaluate(CountFunction funcExp, object data, IEnumerable <object> parameters = null)
{
var paramValues = _GetParameterValues(funcExp, data, parameters);
return(((IEnumerable <object>)paramValues[0]).Count());
}
public string ToSQL(CountFunction funcExp)
{
return(_FunctionToSQL(funcExp, "COUNT"));
}
