vb.net dynamic SQL String

Hi Experts,

I am trying to see if there is a way where I can complete this search via my VB.Net application, or SQL Server without having multiple if functions

The application has a selection criteria, however it is not compulsory that every item is filled out depending on the search they want to complete.

the SQL that would complete this is

select  w.WorkOrderNumber, w.WorkOrderType, r.result,
d.DeptDescription, u.UserID, w.DatetobeStarted, w.DatetobeFinished 
from WorkOrders.WorkOrders w 
left join Risks.RAM  r on r.RiskID = w.RiskID 
left join WorkOrders.Dept d on d.DeptID = w.DeptID 
left join Users.Users u on w.Assignedto = u.UserIDNumber 
where 
(u.UserIDNumber is null or (UserIDNUmber = 1003)) 
and (d.DeptID is null or(d.DeptID  = 1))
and (w.FaultID is null or (w.FaultID = 4))
and (r.Result  is null or (r.Result = 2))
and (w.Status is null or (w.Status = 9))
and (w.DatetobeStarted is null or (w.DatetobeStarted = '2014-03-04'))
and (w.DatetobeFinished is null or (w.DatetobeFinished = '2014-03-04'))

Select allOpen in new window

What I am trying to avoid is multiple if statements \ conditions for every possibility of the search

thanks
Simon