How to initiate a var which will store array of values with different datatypes? - entity-framework

Question

I have a dynamic expression built in .net, which works if the column type is string, however, if the column is date or int then i have to convert the input to the respective datatype before passing to the expression. How can I make it dynamic?
MemberExpression member = Expression.Property(param, filter.Name);
var propertyType = ((PropertyInfo)member.Member).PropertyType;
if (propertyType.GetType() == typeof(Int32))
{
var criteria = Array.ConvertAll(filter.Value, Int32.Parse);
}
else if (propertyType.GetType() == typeof(DateTime))
{
var criteria = Array.ConvertAll(filter.Value, DateTime.Parse);
}
else
{
var criteria = filter.Value;
}
criteria.Aggregate( // -- gives error here since criteria does not exist in current context
(Expression)Expression.Constant(false),
(acc, next) =>
Expression.MakeBinary(
ExpressionType.Or,
acc, Expression.Equal(member, Expression.Constant(next))));
I already tried defining
var criteria = null;
var criteria = object[];
dynamic criteria;
var criteria = new {};
Payload
{
"pageFilters": [
{
"name": "string",
"condition": "Equals",
"value": [
"string"
]
}
]
}