public IQueryable<T> ApplyFiltersAndSort<T>(DataTablesParam dtParameters, IQueryable<T> data, DataTablesPropertyInfo[] columns)
{
if (!String.IsNullOrEmpty(dtParameters.sSearch))
{
var parts = new List<string>();
var parameters = new List<object>();
for (var i = 0; i < dtParameters.iColumns; i++)
{
if (dtParameters.bSearchable[i])
{
try
{
parts.Add(GetFilterClause(dtParameters.sSearch, columns[i], parameters));
}
catch (Exception)
{
//if the clause doesn't work, skip it!
}
}
}
var values = parts.Where(p => p != null);
data = data.Where(string.Join(" or ", values), parameters.ToArray());
}
for (int i = 0; i < dtParameters.sSearchValues.Count; i++)
{
if (dtParameters.bSearchable[i])
{
var searchColumn = dtParameters.sSearchValues[i];
if (!string.IsNullOrWhiteSpace(searchColumn))
{
DataTablesPropertyInfo column = FindColumn(dtParameters, columns, i);
var parameters = new List<object>();
var filterClause = GetFilterClause(searchColumn, column, parameters);
if (string.IsNullOrWhiteSpace(filterClause) == false)
{
data = data.Where(filterClause, parameters.ToArray());
}
}
}
}
string sortString = "";
for (int i = 0; i < dtParameters.iSortingCols; i++)
{
int columnNumber = dtParameters.iSortCol[i];
DataTablesPropertyInfo column = FindColumn(dtParameters, columns, columnNumber);
string columnName = column.PropertyInfo.Name;
string sortDir = dtParameters.sSortDir[i];
if (i != 0)
sortString += ", ";
sortString += columnName + " " + sortDir;
}
if (string.IsNullOrWhiteSpace(sortString))
{
sortString = columns[0].PropertyInfo.Name;
}
data = data.OrderBy(sortString);
return data;
}
private DataTablesPropertyInfo FindColumn(DataTablesParam dtParameters, DataTablesPropertyInfo[] columns, int i)
{
if (dtParameters.sColumnNames.Any())
{
return columns.First(x => x.PropertyInfo.Name == dtParameters.sColumnNames[i]);
}
else
{
return columns[i];
}
}
