create expression func c# for use in where clause code example
Example 1: create expression func c# for use in where clause
private Expression<Func<PageElement, bool>> ActiveLanguageCheck(byte lang) {
return pe => pe.PageElementLanguages.Where(
y => y.Active).Select(y => y.LanguageId).Contains(lang);
}
Example 2: create expression func c# for use in where clause
public static Expression<Func<T1, TResult>> ToSimpleFunc<T1, T2, TResult>(Expression<Func<T1, T2, TResult>> f, T2 value)
{
var invokeExpression = Expression.Invoke(f, f.Parameters[0], Expression.Constant(value));
return Expression.Lambda<Func<T1, TResult>>(invokeExpression, f.Parameters[0]);
}