Disclaimer: This was originally posted to the KendoUI forums, but has received no answers.
I'm trying to use conditional formatting of elements in my ListView's template. This partial view uses a shared DataSource to allow navigation via Pager, a two-card ListView, and the aforementioned template. Here's the relevant template code:
<script id="contact-template" type="text/x-kendo-template">
<div id="ContactCard" class="IsActive${IsActive}">
#if (Salutation === null || Salutation === '') {#<h4>#}else{#<h4>#=Salutation# #}##=FirstName# #=LastName#</h4>
#if (Title === null || Title === '') {##}else{#<p>#=Title#</p>#}#
<br />
#if (Email == 0 || Email === '') {##}else{#<p><a href='mailto:#=LastName#,%20#=FirstName#%20<#=Email#>'>#=Email#</a></p>#}#
#if (Phone === null || Phone === '') {##}else{#<p>#=Phone##if (Extension === null || Extension === '') {#</p>#}else{# ext. #=Extension#</p>#}##}#
</div>
I've tried several different ways of generating this code, including a simple if with inverted checks like if (Salutation != null && Salutation != '')
but to no avail. I think I'm missing something about how to reference a DataSource's data from within the #if section? I tried something like if (#=Salutation# != null && #=Salutation# != '')
but that threw a bad template error.
Here's the output:
Note: disregard the horrible formatting. This is pre-styling.
Here's the whole file, for reference:
@model int @* accountId *@
<article id="contactArticle">
<div id="contactList"></div>
<footer><span id="pagerTotal"></span><a href="#" class="k-link" id="pageLeft" onclick="pageLeftOne()"><</a><div id="pager"></div><a href="#" class="k-link" id="pageRight" onclick="pageRightOne()">></a></footer>
</article>
<script id="contact-template" type="text/x-kendo-template">
<div id="ContactCard" class="IsActive${IsActive}">
#if (Salutation === null || Salutation === '') {#<h4>#}else{#<h4>#=Salutation# #}##=FirstName# #=LastName#</h4>
#if (Title === null || Title === '') {##}else{#<p>#=Title#</p>#}#
<br />
#if (Email == 0 || Email === '') {##}else{#<p><a href='mailto:#=LastName#,%20#=FirstName#%20<#=Email#>'>#=Email#</a></p>#}#
#if (Phone === null || Phone === '') {##}else{#<p>#=Phone##if (Extension === null || Extension === '') {#</p>#}else{# ext. #=Extension#</p>#}##}#
</div>
</script>
<script type="text/javascript">
var currentPage = 1;
var pages;
var contactDataSource;
//SNIP//
$(document).ready(function() {
var init = 1;
contactDataSource = new kendo.data.DataSource({
transport: {
read: {
url: '@Url.Action("ContactPager", "Contact")',
dataType: "json",
type: "POST",
timeout: 2000,
data: {
accountId: @Model
}
}
},
schema: {
data: "data",
total: "total",
type: "json",
model: {
fields: {
Id: { type: "string"},
FirstName: { type: "string" },
LastName: { type: "string"},
Title: { type: "string", defaultValue: ''},
Salutation: { type: "string", defaultValue: ''},
Extension: { type: "string", defaultValue: ''},
Phone: { type: "string", defaultValue: ''},
Email: { type: "string", defaultValue: ''},
IsActive: {type: "boolean"} //,
//ReceivesDistributionEmails: {type: "boolean"}
}
}
},
pageSize: 2
});
contactDataSource.read();
contactDataSource.bind("change", function(e) {
if (init) {
init = 0;
if (contactDataSource.total() < 1) {
//SNIP
} else {
$("#pager").kendoPager({
dataSource: contactDataSource,
buttonCount: 5
});
//SNIP//
pages = $("#pager").data("kendoPager").dataSource.totalPages();
$("#contactList").kendoListView({
dataSource: contactDataSource,
pageable: true,
template: kendo.template($("#contact-template").html())
});
kendo.init($("#contactList"));
}
}
});
});
</script>
TL;DR: How do I get a Kendo template to build it's content based on the value of the datasource members?
Try wrapping the null in single quotes:
...
#if (Title != 'null' && Title != '') { #
<p>#=Title# </p>
# } #
...
This notation can be used as an alternative although the tags are left behind. It could work depending on what kind of format you are trying to achieve.
<p>${ Title != 'null' && Title != '' ? Title : ''} </p>