I want to read xml elements if elements not null

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C#

var q = from b in okuyucu.Descendants("ARAC")
                           select new
                           {
                               userName= (string)b.Element("userName"),
                               login= (string)b.Element("login"),
                               password= (string)b.Element("password")
                           }

I write a xml document from two different windows form. And I read this xml from another windows form.
My problem is that
My first form don't write "login". When I read xml it's occurs because there is'nt any element which is name "login";
I want to write like that
if login is exist then login= (string)b.Element("login") else login=""
How can I do it in "select new{}"

Posted 7-Apr-15 23:54pm

amagitech

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Comments

Sinisa Hajnal 8-Apr-15 6:39am

Exactly as you wrote: if b.Element("login") != null "do something" else "do something else"

amagitech 8-Apr-15 6:45am

if(b.Element("Login")!=null){Login=(string)b.Element("login")}else{Login=""},
Error 259 'Tarayici2c_SUZ.Surregate.SigortaTipi' is a 'type' but is used like a 'variable' C:\crm\Crm2C\crm2C\Tarayici2c_SUZ\MainForm.cs 243 33 Tarayici2c_SUZ

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Mario Z · Accepted Answer · 2015-04-08T01:28:00

Solution 1

Use null-coalescing operator (?? operator):

C#

var q = from b in okuyucu.Descendants("ARAC")
        select new
        {
            userName = (string)b.Element("userName"),
            login = (string)b.Element("login") ?? string.Empty,
            password = (string)b.Element("password")
        };

Posted 8-Apr-15 1:28am

Mario Z

Comments

amagitech 8-Apr-15 9:45am

thank you.

Mario Z 8-Apr-15 9:52am

you're welcome

Maciej Los 8-Apr-15 10:44am

+5!