Update the ListView on Updating a Data Source Item
Environment
| Product | Progress® Kendo UI® ListView for jQuery |
| Operating System | Windows 10 64bit |
| Visual Studio Version | Visual Studio 2017 |
| Preferred Language | JavaScript |
Description
How can I update the ListView when an update of a data source items occurs?
Solution
The ListView does not update the content dynamically on model field update.
To re-render the widget, manually trigger the change event of the dataSource after the model update. The following example demonstrates how to achieve this behavior.
<div id="example">
<div class="demo-section k-content wide">
<fieldset>
<dd>
ProductName (first data item):
</dd>
<dt>
<input data-bind="value: newProductName" />
<button data-bind="click: updateValue">Set</button>
</dt>
</fieldset>
<div>
<h4>Update a record</h4>
<div data-role="listview"
data-edit-template="edit-template"
data-template="template"
data-bind="source: products,
visible: isVisible,
events: {
save: onSave
}"
style="height: 300px; overflow: auto"></div>
</div>
</div>
<script type="text/x-kendo-tmpl" id="template">
<div class="product-view k-widget">
<dl>
<dt>Product Name</dt>
<dd>#:ProductName#</dd>
<dt>Unit Price</dt>
<dd>#:kendo.toString(UnitPrice, "c")#</dd>
<dt>Units In Stock</dt>
<dd>#:UnitsInStock#</dd>
<dt>Discontinued</dt>
<dd>#:Discontinued#</dd>
</dl>
<div class="edit-buttons">
<a role="button" class="k-button k-button-solid-base k-button-solid k-button-md k-rounded-md k-edit-button" href="\\#"><span class="k-icon k-i-edit"></span></a>
<a role="button" class="k-button k-button-solid-base k-button-solid k-button-md k-rounded-md k-delete-button" href="\\#"><span class="k-icon k-i-delete"></span></a>
</div>
</div>
</script>
<script type="text/x-kendo-tmpl" id="edit-template">
<div class="product-view k-widget">
<dl>
<dt>Product Name</dt>
<dd>
<span class="k-textbox k-input k-input-md k-rounded-md k-input-solid">
<input type="text" class="k-input-inner" data-bind="value:ProductName" name="ProductName" required="required" validationMessage="required" />
</span>
<span data-for="ProductName" class="k-invalid-msg"></span>
</dd>
<dt>Unit Price</dt>
<dd>
<input type="text" data-bind="value:UnitPrice" data-role="numerictextbox" data-type="number" name="UnitPrice" required="required" min="1" validationMessage="required" />
<span data-for="UnitPrice" class="k-invalid-msg"></span>
</dd>
<dt>Units In Stock</dt>
<dd>
<input type="text" data-bind="value:UnitsInStock" data-role="numerictextbox" name="UnitsInStock" required="required" data-type="number" min="0" validationMessage="required" />
<span data-for="UnitsInStock" class="k-invalid-msg"></span>
</dd>
<dt>Discontinued</dt>
<dd><input type="checkbox" class="k-checkbox k-checkbox-md k-rounded-md" name="Discontinued" data-bind="checked:Discontinued"></dd>
</dl>
<div class="edit-buttons">
<a role="button" class="k-button k-button-solid-base k-button-solid k-button-md k-rounded-md k-icon-button k-update-button" href="\\#"><span class="k-button-icon k-icon k-i-check"></span></a>
<a role="button" class="k-button k-button-solid-base k-button-solid k-button-md k-rounded-md k-icon-button k-cancel-button" href="\\#"><span class="k-button-icon k-icon k-i-cancel"></span></a>
</div>
</div>
</script>
<script>
var viewModel = kendo.observable({
newProductName: "test",
updateValue: function() {
this.products.at(0).set("ProductName", this.newProductName);
this.products.trigger("change");
},
isVisible: true,
onSave: function(e) {
},
products: new kendo.data.DataSource({
schema: {
model: {
id: "ProductID"
}
},
batch: true,
transport: {
read: {
url: "//demos.telerik.com/kendo-ui/service/products",
dataType: "jsonp"
},
update: {
url: "//demos.telerik.com/kendo-ui/service/products/update",
dataType: "jsonp"
},
destroy: {
url: "//demos.telerik.com/kendo-ui/service/products/create",
dataType: "jsonp"
},
parameterMap: function(options, operation) {
if (operation !== "read" && options.models) {
return {models: kendo.stringify(options.models)};
}
}
}
})
});
kendo.bind($("#example"), viewModel);
</script>
<style>
.product-view
{
float: left;
width: 50%;
height: 300px;
box-sizing: border-box;
border-top: 0;
position: relative;
}
.product-view:nth-child(even) {
border-left-width: 0;
}
.product-view dl
{
margin: 10px 10px 0;
padding: 0;
overflow: hidden;
}
.product-view dt, dd
{
margin: 0;
padding: 0;
width: 100%;
line-height: 24px;
font-size: 18px;
}
.product-view dt
{
font-size: 11px;
height: 16px;
line-height: 16px;
text-transform: uppercase;
opacity: 0.5;
}
.product-view dd
{
height: 46px;
overflow: hidden;
white-space: nowrap;
text-overflow: ellipsis;
}
.product-view dd .k-widget,
.product-view dd .k-textbox {
font-size: 14px;
}
.k-listview
{
border-width: 1px 1px 1px 0;
padding: 0;
overflow: hidden;
min-height: 298px;
}
.edit-buttons
{
position: absolute;
bottom: 0;
left: 0;
right: 0;
text-align: right;
padding: 5px;
background-color: rgba(0,0,0,0.1);
}
span.k-invalid-msg
{
position: absolute;
margin-left: 6px;
}
.k-add-button {
margin-bottom: 2em;
}
@media only screen and (max-width : 620px) {
.product-view
{
width: 100%;
}
.product-view:nth-child(even) {
border-left-width: 1px;
}
}
</style>
</div>