asp.net core select list to show value if text is empty

Marius Vasile

I have a select that takes UserName as value and FirstName + LastName as Text. User is not required to enter first and last namem so I want the select to show UserName (which is the email use for registration) if FirstName and LastName are empty. I tried the below variant but is not working properly, it either gives only UserName for all or empty spaces

MemberList = await _context.UsersData.Where(s => s.OrgID == orgid).Select(s => new
       SelectListItem
       {
         Value = s.UserName,
         Text = s.FirstName + " " + s.LastName == null ? s.UserName : s.FirstName + " " + s.LastName
       }).ToListAsync();

8 Replies

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Sachin Singh5y ago
No, sir
Your answer is absolutely correct, and will always produce the correct answer.
+2
Marius Vasile5y ago
Thank you Sachin. I already have a condition on user updating their first and last names, it will not allow one of it to be empty on post, either all entered or both empty. Therefore
Text = (s.FirstName == null ? s.UserName : s.FirstName) + " " + (s.LastName == null ? "" : (s.LastName))
gives the result I am looking for. I wanted to know if is a clean one, I mean, can it give errors later on?
+2
Marius Vasile5y ago
Thank you Rijwan, I don't mind the extra space in the view, the value stored in the database will be Value = s.UserName anyway
+2
Sachin Singh5y ago
I find this cleaner
Text =
(s.FirstName = = null && s.LastName !=null)? s.UserName+""+s.LastName : (s.FirstName!=null && s.LastName==null) ? s.FirstName : s.UserName;
+3
Rijwan Ansari5y ago
Hi,

do it in this way.
Text = (s.FirstName == null ? s.UserName : s.FirstName) + (s.LastName == null ? "" : (" " + s.LastName))
Otherwise one extra " " will be there if last name is missing.
+3
Marius Vasile5y ago
It is working with
Text = (s.FirstName == null ? s.UserName : s.FirstName) + " " + (s.LastName == null ? "" : (s.LastName))
but is it a "clean" solution?
+3
Marius Vasile5y ago
It partially works, but it shows FirstName twice when is not null
+2
Sachin Singh5y ago
test this
MemberList = await _context.UsersData.Where(s => s.OrgID == orgid).Select(s => new
       SelectListItem
       {
         Value = s.UserName,
         Text = s.FirstName + " " + (s.LastName == null ? s.UserName : s.FirstName + " " + s.LastName)
       }).ToListAsync();
+3