c# 4.0 - JavaScript to choose droplist value not working in ASP .NET MVC4 with HTMLHelper and "All" -

-

i'm using javascript selected value of drop list in mvc 4 have issue think caused htmlhelper.

controller - populate droplist

private string populatestandard(object selectedvalue = null) {     var query = db.database                   .sqlquery<standardmodel>(                         "select * [dbo].[getstandards] ('" +                          user.identity.name + "', '" + datetime.utcnow + "')")                   .tolist();      viewbag.standard = new selectlist(query, "standard", "standard", selectedvalue);      try { return query[0].standard; }     catch { return ""; } }

view

the view has section drop list. please note inclusion of "all". think problem. puts first row atop drop list saying "all" null value. want that. far (so what)

@html.displaynamefor(m => m.standard) @html.dropdownlist("standard", "all")

javascript

it's long story, have other code requires me value of drop list using javascript, i'm doing this:

var e = document.getelementbyid("standard"); var sstandard = e.options[e.selectedindex].value;

problem

if no value chosen, should first row, "all" text or "" value. instead, i'm getting second row, first 1 data populated database.

is html helper causing me not first row? or javascript off?

edit - show viewsource on drop list

these first few lines of rendered list

<select id="standard" name="standard"><option value="">all</option> <option value="2s">2s</option> <option value="aero">aero</option>

@html.dropdownlist("standard", "all")

here "all" option label. not value.


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