Concat Max Value to an int32 using Linq











up vote
0
down vote

favorite












I'm new in using Linq and I'm having a problem on how to Concat a max value in my database to be used as unique attribute using linq. I have found a solution but it is written in SQL query



(select ISNULL(MAX(PersonID + 1), 100000) as nn from Persons)



and tried it and the max personId is 80 so the output becomes 100081 Thanks



EDIT: so i stand corrected, it only acts as Case, sorry guys i feel so dumb :(






c# sql linq







share|improve this question
























  • If the max personId is 80, from this query it will return 81. Also I don't understand 100000 part, why you would set to 100000 if your id does not exist in that table?
    – SeM
    Nov 22 at 6:43












  • @SeM no sir it will return 100081 because of the 100000 that is being concat
    – Enrique Gil
    Nov 22 at 6:45






  • 1




    Where do you see Concat here? It will check if PersonId is null then it will SELECT 100000 if it is not - MAX(PersonID + 1).
    – SeM
    Nov 22 at 6:47










  • could you run this command and check output (select ISNULL(MAX(PersonID + 1), 999999999) as nn from Persons)
    – Ehsan.Saradar
    Nov 22 at 6:47






  • 1




    @EnriqueGil It is the same with: var maxId = context.Persons.Max(p => (int?)p.PersonID); maxId = maxId != null ? maxId+1 : 100000;
    – SeM
    Nov 22 at 7:28















up vote
0
down vote

favorite












I'm new in using Linq and I'm having a problem on how to Concat a max value in my database to be used as unique attribute using linq. I have found a solution but it is written in SQL query



(select ISNULL(MAX(PersonID + 1), 100000) as nn from Persons)



and tried it and the max personId is 80 so the output becomes 100081 Thanks



EDIT: so i stand corrected, it only acts as Case, sorry guys i feel so dumb :(






c# sql linq







share|improve this question
























  • If the max personId is 80, from this query it will return 81. Also I don't understand 100000 part, why you would set to 100000 if your id does not exist in that table?
    – SeM
    Nov 22 at 6:43












  • @SeM no sir it will return 100081 because of the 100000 that is being concat
    – Enrique Gil
    Nov 22 at 6:45






  • 1




    Where do you see Concat here? It will check if PersonId is null then it will SELECT 100000 if it is not - MAX(PersonID + 1).
    – SeM
    Nov 22 at 6:47










  • could you run this command and check output (select ISNULL(MAX(PersonID + 1), 999999999) as nn from Persons)
    – Ehsan.Saradar
    Nov 22 at 6:47






  • 1




    @EnriqueGil It is the same with: var maxId = context.Persons.Max(p => (int?)p.PersonID); maxId = maxId != null ? maxId+1 : 100000;
    – SeM
    Nov 22 at 7:28













up vote
0
down vote

favorite









up vote
0
down vote

favorite











I'm new in using Linq and I'm having a problem on how to Concat a max value in my database to be used as unique attribute using linq. I have found a solution but it is written in SQL query



(select ISNULL(MAX(PersonID + 1), 100000) as nn from Persons)



and tried it and the max personId is 80 so the output becomes 100081 Thanks



EDIT: so i stand corrected, it only acts as Case, sorry guys i feel so dumb :(






c# sql linq







share|improve this question















I'm new in using Linq and I'm having a problem on how to Concat a max value in my database to be used as unique attribute using linq. I have found a solution but it is written in SQL query



(select ISNULL(MAX(PersonID + 1), 100000) as nn from Persons)



and tried it and the max personId is 80 so the output becomes 100081 Thanks



EDIT: so i stand corrected, it only acts as Case, sorry guys i feel so dumb :(






c# sql linq




c# sql linq






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 22 at 6:57

























asked Nov 22 at 6:38









Enrique Gil

36021135




36021135












  • If the max personId is 80, from this query it will return 81. Also I don't understand 100000 part, why you would set to 100000 if your id does not exist in that table?
    – SeM
    Nov 22 at 6:43












  • @SeM no sir it will return 100081 because of the 100000 that is being concat
    – Enrique Gil
    Nov 22 at 6:45






  • 1




    Where do you see Concat here? It will check if PersonId is null then it will SELECT 100000 if it is not - MAX(PersonID + 1).
    – SeM
    Nov 22 at 6:47










  • could you run this command and check output (select ISNULL(MAX(PersonID + 1), 999999999) as nn from Persons)
    – Ehsan.Saradar
    Nov 22 at 6:47






  • 1




    @EnriqueGil It is the same with: var maxId = context.Persons.Max(p => (int?)p.PersonID); maxId = maxId != null ? maxId+1 : 100000;
    – SeM
    Nov 22 at 7:28


















  • If the max personId is 80, from this query it will return 81. Also I don't understand 100000 part, why you would set to 100000 if your id does not exist in that table?
    – SeM
    Nov 22 at 6:43












  • @SeM no sir it will return 100081 because of the 100000 that is being concat
    – Enrique Gil
    Nov 22 at 6:45






  • 1




    Where do you see Concat here? It will check if PersonId is null then it will SELECT 100000 if it is not - MAX(PersonID + 1).
    – SeM
    Nov 22 at 6:47










  • could you run this command and check output (select ISNULL(MAX(PersonID + 1), 999999999) as nn from Persons)
    – Ehsan.Saradar
    Nov 22 at 6:47






  • 1




    @EnriqueGil It is the same with: var maxId = context.Persons.Max(p => (int?)p.PersonID); maxId = maxId != null ? maxId+1 : 100000;
    – SeM
    Nov 22 at 7:28
















If the max personId is 80, from this query it will return 81. Also I don't understand 100000 part, why you would set to 100000 if your id does not exist in that table?
– SeM
Nov 22 at 6:43






If the max personId is 80, from this query it will return 81. Also I don't understand 100000 part, why you would set to 100000 if your id does not exist in that table?
– SeM
Nov 22 at 6:43














@SeM no sir it will return 100081 because of the 100000 that is being concat
– Enrique Gil
Nov 22 at 6:45




@SeM no sir it will return 100081 because of the 100000 that is being concat
– Enrique Gil
Nov 22 at 6:45




1




1




Where do you see Concat here? It will check if PersonId is null then it will SELECT 100000 if it is not - MAX(PersonID + 1).
– SeM
Nov 22 at 6:47




Where do you see Concat here? It will check if PersonId is null then it will SELECT 100000 if it is not - MAX(PersonID + 1).
– SeM
Nov 22 at 6:47












could you run this command and check output (select ISNULL(MAX(PersonID + 1), 999999999) as nn from Persons)
– Ehsan.Saradar
Nov 22 at 6:47




could you run this command and check output (select ISNULL(MAX(PersonID + 1), 999999999) as nn from Persons)
– Ehsan.Saradar
Nov 22 at 6:47




1




1




@EnriqueGil It is the same with: var maxId = context.Persons.Max(p => (int?)p.PersonID); maxId = maxId != null ? maxId+1 : 100000;
– SeM
Nov 22 at 7:28




@EnriqueGil It is the same with: var maxId = context.Persons.Max(p => (int?)p.PersonID); maxId = maxId != null ? maxId+1 : 100000;
– SeM
Nov 22 at 7:28

















active

oldest

votes











Your Answer






StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");

StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});

function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});


}
});














draft saved

draft discarded


















StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53425158%2fconcat-max-value-to-an-int32-using-linq%23new-answer', 'question_page');
}
);

Post as a guest















Required, but never shown






























active

oldest

votes













active

oldest

votes









active

oldest

votes






active

oldest

votes
















draft saved

draft discarded




















































Thanks for contributing an answer to Stack Overflow!


  • Please be sure to answer the question. Provide details and share your research!

But avoid …



  • Asking for help, clarification, or responding to other answers.

  • Making statements based on opinion; back them up with references or personal experience.


To learn more, see our tips on writing great answers.





Some of your past answers have not been well-received, and you're in danger of being blocked from answering.


Please pay close attention to the following guidance:


  • Please be sure to answer the question. Provide details and share your research!

But avoid …



  • Asking for help, clarification, or responding to other answers.

  • Making statements based on opinion; back them up with references or personal experience.


To learn more, see our tips on writing great answers.




draft saved


draft discarded














StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53425158%2fconcat-max-value-to-an-int32-using-linq%23new-answer', 'question_page');
}
);

Post as a guest















Required, but never shown





















































Required, but never shown














Required, but never shown












Required, but never shown







Required, but never shown

































Required, but never shown














Required, but never shown












Required, but never shown







Required, but never shown







-

Popular posts from this blog

What visual should I use to simply compare current year value vs last year in Power BI desktop

Image
0 I have column SubToBind that shows current year ratio and column PY SubToBind which shows previous year ratio. How can I simply create a card that would be displaying them both in a nice way? Something like that: I cannot achieve that with regular card, I also tried Card with States by OKViz but also unable to see both values. In KPI visual - I dont like the word "Goal", it will confuse end users. Are there any cards or other visuals that would do the job? Thanks powerbi dax powerbi-embedded share | improve this question edited Jun 11 '18 at 20:11 Oleg ...
Read more

How to ignore python UserWarning in pytest?

Image
up vote 1 down vote favorite I am using openpyxl for parsing .xlsm files, and pytest for testing. When I open a file, I get the: OpenPyxl -> UserWarning: Data Validation extension is not supported and will be removed That is not really a problem bcs. program works and I can't change the .xlsm file to fix that. But... When I run pytest with something like: def test_wrong_file_format(): assert check_excel(open_excel('file.xlsm')) == True I will get the warning i mentioned altought check_excel(open_excel('file.xlsm')) returns True and the test should suceed... Is there a nice way to tell the pytest that "It's not a bug it's a feature" and tests should pass even when they get this warning? Is there other way than using something like: with pytest.warns(UserWarning): ...
Read more

Alexandru Averescu

Image
Alexandre Averescu Alexandru Averescu Naissance 3 avril 1859 Babele, Ismail  (ro) près de Izmaïl (principauté de Moldavie) Décès 2 octobre 1938 (à 79 ans) [ 1 ] Bucarest Origine   Roumanie Arme cavalerie Grade Maréchal Années de service 1901-1917 Commandement chef d'état-major général 2 e  armée 3 e  armée Groupe d'armée sud armée du Danube Conflits Guerre russo-turque de 1877-1878 Deuxième guerre balkanique Première Guerre mondiale Faits d'armes Bataille de Turtucaia/Tutrakan Bataille de Mărăști Distinctions Autres fonctions 3 fois président du Conseil des ministres ministre des Affaires étrangères ministre sans portefeuille conseiller de la Couronne modifier   Alexandre Averescu (en roumain : Alexandru Averescu .mw-parser-output .prononciation>a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/8/8a/Loudspeaker.svg/11px-Loudspeaker.svg.png")center ...
Read more