Question

Still really struggling with this and appear to be going round in circles.

I have the following code that is driving me nuts. It should populate a list of items to be used in an autocomplete text box:

public string[] GetAutoComplete(string prefixText, int count)
    {
            string memberid = HttpContext.Current.Session["MemberID"].ToString(); 
            string locationid = HttpContext.Current.Session["LocationID"].ToString();
            string inhouse = HttpContext.Current.Session["Inhouse"].ToString();
            string supplier = HttpContext.Current.Session["Supplier"].ToString();
            string groupw = HttpContext.Current.Session["Group"].ToString();
            string external = HttpContext.Current.Session["External"].ToString();

            MyEnts autocomplete = new MyEnts();

            var r = from p in autocomplete.tblAutoCompletes
                        where p.MemberId == memberid && p.LocationId == locationid && p.ACItem.Contains(prefixText)
                        select p.ACItem;

            if (inhouse == "Inhouse")
                r = r.Where(p => p == inhouse);

            if (supplier == "Supplier")
                r = r.Where(p => p == supplier);

            if (groupw == "Group")
                r = r.Where(p => p == groupw);

            if (external == "External")
                r = r.Where(p => p == external);

            r.OrderBy(p => p);

            return r.ToArray();

What I am trying to retrieve with the dynamic where clause along the lines of the following.

Should inhouse = “Inhouse”, then the list of items should include the word “Inhouse”. If inhouse != “Inhouse”, the word “Inhouse” should be excluded from the list.

This same logic should then be applied across the different where clauses i.e. Supplier, Group, External.

I genuinely have tried lots of different methods but I cannot for the life of me get the thing to work and it’s frustrating me somewhat.

If anyone can suggest a way of doing this, you will either get a big kiss or a big frosty beer should our paths ever cross.

Answer 1

Not exactly sure about your problem here but if you want to exclude then shouldn’t the code be something like

 if (inhouse == "Inhouse")
                r = r.Where(p => p == inhouse);
 else
                r = r.Where(p => p != inhouse);

Oh! if you want just exclusion then the code should be something like

if (inhouse != "Inhouse")
                    r = r.Where(p => p != inhouse);