public static Expression <Func <T, bool> > And <T>(string[] keys, T t)
{
if (keys == null)
{
return(null);
}
var expression = EfUtils.True <T>();
for (int i = 0; i < keys.Length; i++)
{
var text = keys[i];
var expr = t.GetType().GetProperty(text);
var val = expr.GetValue(t, null).ToString();
var type = expr.ToString();
if (text.ToLower().Equals("datetime") || text.ToLower().Equals("clientdatetime"))
{
expression = expression.And(EfUtils.AndIndexOf <T>(type, text, val));
}
else
{
expression = expression.And(EfUtils.And <T>(type, text, val));
}
}
return(expression);
}
public static Expression <Func <T, bool> > AndByGuid <T>(string key, Guid val)
{
if (string.IsNullOrEmpty(key) || val == null)
{
return(null);
}
var expression = EfUtils.True <T>();
expression = expression.And(EfUtils.AndByGuid <T>("Guid", key, val));
return(expression);
}
public static Expression <Func <T, bool> > AndByGuid <T>(string[] keys, Guid val)
{
if (keys == null || val == null)
{
return(null);
}
var expression = EfUtils.True <T>();
for (int i = 0; i < keys.Length; i++)
{
var text = keys[i];
expression = expression.And(EfUtils.AndByGuid <T>("Guid", text, val));
}
return(expression);
}
public static Expression <Func <T, bool> > AndOr <T>(string[] keys, string orKey, T t)
{
if (keys == null)
{
return(null);
}
var expression = EfUtils.And <T>(keys, t);
if (!string.IsNullOrEmpty(orKey))
{
Expression <Func <T, bool> > exp_right = EfUtils.And <T>(new string[]
{
orKey
}, t);
expression = expression.Or(exp_right);
}
return(expression);
}