asp.net mvc - What are the rules for nesting @'s in Razor syntax? -



asp.net mvc - What are the rules for nesting @'s in Razor syntax? -

i've started razor (v3) , it's fine, don't understand rules behind when need utilize @ sign.

here illustration current project.

in code:

@if (viewbag.forcepublic == null && user.identity.getuserid() == @model.seller.id) { <h2>listing status</h2> switch (model.status) {

if set @ in front end of switch statement, runtime error saying don't need nest @ signs.

however, in code:

@if(!model.bizaddress.streetaddress.isempty()) { @html.displayfor(model => model.bizaddress.streetaddress); }

not not syntax error (as 1 expect, considering illustration above), if don't include @ sign in front end of html.displayfor, streetaddress not printed. instead silently fails!

i understand why happening can avoid subtle bugs might cause in future.

i suspect root cause has fact templating (i think) analogous preprocessor step, , scoping of c# code known @ runtime, these 2 examples structurally same after both steps take place (preprocess, compile , run).

@ in razor used 2 different purposes:

1- denote start of code block razor using @ character. <% %> in web forms.

2- inline expressions (variables , functions) start @ (for writing content on page). <%: %> or <% response.write() %> in web forms.

in code, @ character before if denotes start of code block. end of block end } of if block. don't need , not allowed utilize @ in between. but, @ before html.displayfor() used inline expression. in fact, should not set semi-colon @ end of line, otherwise semi-colon displayed after display name on page.

look @ quick reference more details.

asp.net-mvc razor

Comments

Post a Comment

Popular posts from this blog

xslt - DocBook 5 to PDF transform failing with error: "fo:flow" is missing child elements. Required content model: marker* -

xslt - DocBook 5 to PDF transform failing with error: "fo:flow" is missing child elements. Required content model: marker* - i've inherited doc publishing process takes docbook , builds html , pdf output, using apache fop both. project had been started, never completed. lots of tweaking, i've able of doc sets build (20+), except handful, , fail severe code 1 of these 2 conditions: "fo:flow" missing kid elements. required content model: marker* "fo:block" not valid kid of "fo:root" the xml output comes out of docbook , docbook-fop checks out well-formed. the fop error in 1 book, "endecagloss", example, points end of string: <fo:flow flow-name="xsl-region-body" start-indent="4pc" end-indent="0pt"/> here’s log output in case: [java] severe: javax.xml.transform.transformerexception: file:/scratch/publishing/hudson/jobs/build-main-endeca-documentation/workspace/serverdoc/w...
Read more

mediawiki - How do I insert tables inside infoboxes on Wikia pages? -

mediawiki - How do I insert tables inside infoboxes on Wikia pages? - i want insert tables in infoboxes. example, have proteinbox i've developed using infobox template (http://health-and-medicine.wikia.com/wiki/template:proteinbox), , fasta field big fit comfortably in proteinbox. hence collapsible table within box. this tried: {{infobox | row 1 = {| class = "mw-collapsible mw-collapsed wikitable" |- | <!-- table content --> |} }} your problem is, putting nested table within template. pipe characters ( | ) in table syntax collides pipe usage in templates. the commonly used hack around create template called template:! , containing pipe character, , utilize when need set tables, parser functions or other stuff using pipe characters, within templates. table (with every | replaced {{!}} ): {{{!}} {{!}}- {{!}} a1 {{!}} b1 {{!}}- {{!}} a2 {{!}} b2 {{!}}} ...the equivalent of {| |- | a1 | b1 |- | a2 | b2 |} furthermore, hav...
Read more

Local Service User Logged into Windows -

Local Service User Logged into Windows - i created windows service tracks app server user connected through load balancer. it retrieves user logged windows on machine, cross references active directory (ad) business relationship homecoming first name, lastly name , e-mail (for notification through website created project) there 1 scheme on network users remote system, vista system, reason returning values "local service" logged machine, it's weird , security guys impossible "local service" business relationship logged windows. here how user logged windows managementscope ms = new managementscope("\\\\.\\root\\cimv2"); objectquery query = new objectquery("select * win32_computersystem"); managementobjectsearcher searcher = new managementobjectsearcher(ms, query); foreach (managementobject mo in searcher.get()) { _username = mo["username"].tostring(); } // remove domain part username string[] usernameparts = _...
Read more