Syntax substring sqlit

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public ActionResult GetRegion(string countryCode)
        {
            if (!string.IsNullOrWhiteSpace(countryCode))
            {
          List<Lsite> Lsites = db.Site.Where(t => t.Nom.Substring(1,5) == countryCode)
                                     .Select(x => new Lsite
                                     {
                                         CountryCode = x.code,
                                         Name = x.Nom
                                     }).ToList();
                return Json(Lsites, JsonRequestBehavior.AllowGet);
            }
            return null;
        }

What I have tried:

I want to know the good syntax.
This one in not correct

Posted 19-Dec-19 5:17am

Member 14663996

Updated 19-Dec-19 6:49am

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Comments

Richard Deeming 19-Dec-19 11:39am

You're going to need to explain why this one is "not correct". Remember, we can't see your data, and we don't know what you're expecting this code to do.

NB: One obvious problem would be if a site's name didn't have at least six characters. Or perhaps the country code starts at the first character, so you should be using Substring(0, 5)?

Member 14663996 19-Dec-19 12:45pm

Substring(0, 5) he is the good syntax. thank

Richard Deeming 19-Dec-19 12:46pm

In that case, it would probably be better to use StartsWith. That way, you won't get an exception if the name is too short.

ZurdoDev 19-Dec-19 12:28pm

Reply to the comment so that the person who made the comment is notified.

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Richard Deeming · Accepted Answer · 2019-12-19T06:50:00

As discussed in the comments, either use Substring(0, 5):

C#

db.Site.Where(t => t.Nom.Substring(0, 5) == countryCode)

or StartsWith:

C#

db.Site.Where(t => t.Nom.StartsWith(countryCode))

Substring will throw an exception if the name is not at least five characters long.

StartsWith can return true even if the countryCode is not exactly five characters long.