protected decimal SumOf(DataGridColumn <TItem> column)
{
if (!ValidNumericTypes.Contains(column.GetValueType()))
{
return(0);
}
return((from item in Data
let value = column.GetValue(item)
select Convert.ToDecimal(value)).Sum());
}
/// <summary>
/// Average value of numeric value.
/// </summary>
public static object Average(IEnumerable <TItem> Data, DataGridColumn <TItem> column)
{
if (!ValidNumericTypes.Contains(column.GetValueType()))
{
return(0);
}
return((from item in Data
let value = column.GetValue(item)
select Convert.ToDecimal(value)).Average());
}
protected int FalseCountOf(DataGridColumn <TItem> column)
{
if (!ValidBooleanTypes.Contains(column.GetValueType()))
{
return(0);
}
return((from item in Data
let value = Convert.ToBoolean(column.GetValue(item))
where !value
select value).Count());
}
/// <summary>
/// Count all boolean values that are true.
/// </summary>
public static object TrueCount(IEnumerable <TItem> Data, DataGridColumn <TItem> column)
{
if (!ValidBooleanTypes.Contains(column.GetValueType()))
{
return(0);
}
return((from item in Data
let value = Convert.ToBoolean(column.GetValue(item))
where value
select value).Count());
}
