How to write dynamic where clause for join range varible

Question

I‘ve been working on a query using LINQ but I’ve run into a snag with a dynamic where clause. I want to check for a condition and if true then add that where to my query.

Answer 1

the problem is your order, at the select you are discarding all data not in the select statement, if you use a Inline if statement then you can easily do it in the first where clause or you can separate the select out after though you may have to convery from a Linq query to linq statments

var query = from project in db.ProjMasters
             join pd in db.ProjDetails on project.ProjMasterID equals pd.ProjMasterID
             join dc in db.DivCodes on project.DivisionCode equals dc.DivCode1
             join ec in db.EmpCodes on project.ProjManager equals ec.UserNm
             join ptc in db.ProjTypeCodes on pd.ProjTypeCode equals ptc.ProjTypeCode1
             join psc in db.ProjStatusCodes on pd.ProjStatusCode equals psc.ProjStatusCode1
             where pd.ProjDeleteDate == null
                && sProjType!= null ? ptc.TypeDesc==sProjType): true
             orderby project.Title
             select new
             {
                  project.ProjMasterID,
                  project.Title,
                  pd.ProjDesc,
                  pd.ContractNum,
                  pd.ProjDetailID,
                  dc.DivNm,
             }
             if (sTitle != null)
             {
                 query = query.Where(x => x.Title.Contains(sTitle));
             }