c# - Linq to SQL search for wildcard in double -

-

in linq sql trying search value of type double:

var q = in db.gettable<hkks_medlemmer>()             g in db.hkks_get_grader_kun_grad(convert.toint32(a.skif))             a.aktiv == true &&              (a.skif.tostring().startswith(searchvalue) ||              sqlmethods.like(a.navn, "%" + searchvalue + "%") ||               sqlmethods.like(a.mellemnavn, "%" + searchvalue + "%") ||               sqlmethods.like(a.efternavn, "%" + searchvalue + "%") ||               sqlmethods.like(a.adresse, "%" + searchvalue + "%") ||               sqlmethods.like(a.telefon, "%" + searchvalue + "%") ||               sqlmethods.like(a.mobil, "%" + searchvalue + "%") ||               sqlmethods.like(a.postnr, "%" + searchvalue + "%") ||               sqlmethods.like(a.town, "%" + searchvalue + "%") ||               sqlmethods.like(a.mail, "%" + searchvalue + "%"))             orderby a.navn select new             {                 grad = g.grad,                 skif = a.skif,                 navn = a.navn,                 mellemnavn = a.mellemnavn,                 efternavn = a.efternavn,                 adresse = a.adresse,                 telefon = a.telefon,                 mobil = a.mobil,                 postnr = a.postnr,                 town = a.town,                 mail = a.mail,                 picture = "http://www.hkks.dk/" + a.picture,                 age = db.fn_getage((a.cpr), datetime.now),                 cpr = a.cpr              };

i have tried this:

var u = in db.gettable<hkks_medlemmer>()                 g in db.hkks_get_grader_kun_grad(convert.toint32(a.skif))                 .where  (p => object.equals(a.skif, searchvalue))                 orderby a.navn                 select new                 {                     grad = g.grad,                     skif = a.skif,                     navn = a.navn,                     mellemnavn = a.mellemnavn,                     efternavn = a.efternavn,                     adresse = a.adresse,                     telefon = a.telefon,                     mobil = a.mobil,                     postnr = a.postnr,                     town = a.town,                     mail = a.mail,                     picture = "http://www.hkks.dk/" + a.picture,                     age = db.fn_getage((a.cpr), datetime.now),                     cpr = a.cpr                  };

but none of them giving me correct result, if searching 994 , expecting result give me record of 99469.

any suggestions?

from comment .startswith method generates following sql:

(convert(nvarchar(30), [t0].[skif], 2) @p11)

you can use following sql illustrate problem:

declare @val float set @val = 99469 select convert(nvarchar(30), @val, 2)

if run sql, you'll see output string not start "994":

9.946900000000000e+004

in order convert 99469 string without using e+ notation, can rewrite statement this:

convert.toint32(a.skif).tostring().startswith(searchvalue)

that generate following sql, should solve problem:

where (convert(nvarchar,convert(int,[t0].[skif]))) @p11

it nice if declare this:

a.skif.tostring("####").startswith(searchvalue)

but .tostring() method doesn't support in linq sql (i got method 'system.string tostring(system.string)' has no supported translation sql. error message when tried).

also, there may other workarounds. ef4 there may in sqlfunctions allows conversion in 1 step, without converting int (or bigint, if necessary). really, linq sql needs generate statement 0 last parameter, instead of 2 (i.e., convert(nvarchar(30), @val, 0)).

hope helps.


Comments

Post a Comment

Popular posts from this blog

java - Jmockit String final length method mocking Issue -

-
using jmockit 1.2 jar, trying mock string's length method getting unexpected invocation exception: failed: test java.lang.illegalstateexception: missing invocation mocked type @ point; please make sure such invocations appear after declaration of suitable mock field or parameter @ stringdemo.testa$1.<init>(testa.java:17) @ stringdemo.testa.test(testa.java:13) i using testng: @test public void test() throws exception { new expectations() { @mocked("length") string astring; { astring.length(); result = 2; } }; system.out.println(a.showa("test")); } } actual class a: public class { public static int showa(string str){ int a= str.length(); return a; } } this wrong way of recording expected results. shouldn't mock , record string's length() method, record showa() instead. here solution @suppresswarnings("unused...
Read more

What is the difference between data design and data model(ERD) -

-
i have google question , find answer in day. know, data design many many table have list column,and mark pk , fk. why er-diagram have find this? data design process of designing database. main output of data design detailed logical data model of database. some people data design includes of needed logical , physical design choices , physical storage parameters needed generate design in data definition language. technically, database analysis, database analysts (dbas) trained do. while person can both data design , database analysis, these 2 different tasks. data design models data. database analysis takes model , applies 1 or more database engines (relational, hierarchical, nosql). a logical data model 1 of main outputs of data design. data model represented entity relationship diagram, or er diagram.
Read more

ios - Can NSManagedObject conform to NSCoding -

-
i need transfer single object across device. right converting nsmanagedobject dictionary , archiving , sending nsdata. upon receiving unarchiving it. transfer nsmanagedobject archiving , unarchiving instead of creating intermediate data object. @interface test : nsmanagedobject<nscoding> @property (nonatomic, retain) nsstring * title; @end @implementation test @dynamic title; - (id)initwithcoder:(nscoder *)coder { self = [super init]; if (self) { self.title = [coder decodeobjectforkey:@"title"]; //<crash } return self; } - (void)encodewithcoder:(nscoder *)coder { [coder encodeobject:self.title forkey:@"title"]; } @end nsdata *archivedobjects = [nskeyedarchiver archiveddatawithrootobject:testobj]; nsdata *objectsdata = archivedobjects; if ([objectsdata length] > 0) { nsarray *objects = [nskeyedunarchiver unarchiveobjectwithdata:objectsdata]; } the problem above code is. crashes @ self.title in initwithcoder sa...
Read more