ASP.NET MVC ColorGradient Overview
The Telerik UI ColorGradient HtmlHelper for ASP.NET MVC is a server-side wrapper for the Kendo UI ColorGradient widget.
The ColorGradient is a component that renders a gradient color palette. It has a hue and an alpha slider and provides an input that allows you to enter a color or copy the selected one.
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Initializing the ColorGradient
The ColorGradient is usually used as a color editor. The following example demonstrates how to define the ColorGradient.
@(Html.Kendo().ColorGradient()
.Name("colorGradient") // The name of the ColorGradient is mandatory. It specifies the "id" attribute.
.Value("#ff0000")
)
Basic Configuration
The ColorGradient provides default configuration options such as input, format, opacity, and so on.
The following example shows a basic implementation of the control.
@(Html.Kendo().ColorGradient()
.Name("colorGradient")
.Input(true)
.Format(ColorGradientFormat.Hex)
.Opacity(true)
.Value("#f16e0aff")
)
Functionality and Features
Events
You can subscribe to the change ColorGradient event, as is demonstrated in the following example.
@(Html.Kendo().ColorGradient()
.Name("colorGradient")
.Events(ev => ev.Change("colorgradient_change"))
)
<script>
function colorgradient_change(e) {
console.log("The newly selected color is ", e.value);
}
</script>
For a complete example, refer to the demo on using the events of the ColorGradient.
Referencing Existing Instances
To reference an existing Telerik UI ColorGradient instance, use the jQuery.data() configuration option. Once a reference is established, use the ColorGradient client-side API to control its behavior.
@(Html.Kendo().ColorGradient()
.Name("colorGradient")
)
//Get an instance of the ColorGradient by using its Name().
<script>
$(function() {
var colorGradientControl = $("#colorGradient").data("kendoColorGradient");
});
</script>