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Backend API
@{
var directions = new[] {
"down-push", "down-stack", "up-push", "up-stack",
"left-push", "left-stack", "right-push", "right-stack"
};
var positions = new[] {
"top left", "top center", "top right",
"bottom left", "bottom center", "bottom right",
"left center", "center", "right center"
};
var radioGroupItems = new[] { "predefined", "coordinates" };
}
<div class="options">
<div>Position</div>
@(Html.DevExtreme().RadioGroup()
.Items(radioGroupItems)
.Value("predefined")
.Layout(Orientation.Horizontal)
.OnValueChanged("onRadioGroupValueChanged")
)
@(Html.DevExtreme().SelectBox()
.ID("position")
.Items(positions)
.InputAttr("aria-label", "Position")
.Value("bottom center")
.OnSelectionChanged("positionSelectionChanged")
)
<div class="section">
@(Html.DevExtreme().NumberBox()
.ID("positionTop")
.Value(null)
.Width("48%")
.Visible(false)
.ValueChangeEvent("keyup")
.Placeholder("top")
.InputAttr("aria-label", "Position Top")
.OnValueChanged("topNumberBoxValueChanged")
)
@(Html.DevExtreme().NumberBox()
.ID("positionBottom")
.Value(null)
.Width("48%")
.Visible(false)
.ValueChangeEvent("keyup")
.Placeholder("bottom")
.InputAttr("aria-label", "Position Bottom")
.OnValueChanged("bottomNumberBoxValueChanged")
)
</div>
<div class="section">
@(Html.DevExtreme().NumberBox()
.ID("positionLeft")
.Value(null)
.Width("48%")
.Visible(false)
.ValueChangeEvent("keyup")
.Placeholder("left")
.InputAttr("aria-label", "Position Left")
.OnValueChanged("leftNumberBoxValueChanged")
)
@(Html.DevExtreme().NumberBox()
.ID("positionRight")
.Value(null)
.Width("48%")
.Visible(false)
.ValueChangeEvent("keyup")
.Placeholder("right")
.InputAttr("aria-label", "Position Right")
.OnValueChanged("rightNumberBoxValueChanged")
)
</div>
<div>Direction</div>
@(Html.DevExtreme().SelectBox()
.ID("direction")
.Items(directions)
.InputAttr("aria-label", "Direction")
.Value("up-push")
.OnSelectionChanged("directionSelectionChanged")
)
<div class="section">
@(Html.DevExtreme().Button()
.Text("Show")
.Width("48%")
.OnClick("show")
)
@(Html.DevExtreme().Button()
.Text("Hide all")
.Width("48%")
.OnClick("hideAll")
)
</div>
</div>
<script>
let id = 1;
let position = "bottom center";
let direction = "up-push";
const types = ["error", "info", "success", "warning"];
const onRadioGroupValueChanged = ({ value }) => {
const predefinedSelected = value === "predefined";
const positionSelectBox = $("#position").dxSelectBox("instance");
const topNumberBox = $("#positionTop").dxNumberBox("instance");
const bottomNumberBox = $("#positionBottom").dxNumberBox("instance");
const leftNumberBox = $("#positionLeft").dxNumberBox("instance");
const rightNumberBox = $("#positionRight").dxNumberBox("instance");
positionSelectBox.option("visible", predefinedSelected);
topNumberBox.option("visible", !predefinedSelected);
bottomNumberBox.option("visible", !predefinedSelected);
leftNumberBox.option("visible", !predefinedSelected);
rightNumberBox.option("visible", !predefinedSelected);
position = predefinedSelected
? positionSelectBox.option("value")
: {
top: topNumberBox.option("value") || undefined,
left: leftNumberBox.option("value") || undefined,
bottom: bottomNumberBox.option("value") || undefined,
right: rightNumberBox.option("value") || undefined
};
}
const positionSelectionChanged = ({ selectedItem }) => position = selectedItem;
const directionSelectionChanged = ({ selectedItem }) => direction = selectedItem;
const numberBoxValueChange = (value, pos, componentToDisable) => {
position[pos] = value || undefined;
componentToDisable.option('disabled', !!value);
};
const topNumberBoxValueChanged = ({ value }) => {
numberBoxValueChange(value, 'top', $('#positionBottom').dxNumberBox('instance'));
};
const bottomNumberBoxValueChanged = ({ value }) => {
numberBoxValueChange(value, 'bottom', $('#positionTop').dxNumberBox('instance'));
};
const leftNumberBoxValueChanged = ({ value }) => {
numberBoxValueChange(value, 'left', $('#positionRight').dxNumberBox('instance'));
};
const rightNumberBoxValueChanged = ({ value }) => {
numberBoxValueChange(value, 'right', $('#positionLeft').dxNumberBox('instance'));
};
const show = () => {
DevExpress.ui.notify({
message: `Toast ${id}`,
height: 45,
width: 150,
minWidth: 150,
type: types[Math.floor(Math.random() * 4)],
displayTime: 3500,
animation: {
show: { type: "fade", duration: 400, from: 0, to: 1 },
hide: { type: "fade", duration: 40, to: 0 }
}
},
{
position,
direction
}
);
id++;
}
const hideAll = () => DevExpress.ui.hideToasts();
</script>
using DevExtreme.NETCore.Demos.Models.SampleData;
using Microsoft.AspNetCore.Mvc;
using System;
using System.Collections.Generic;
using System.Linq;
namespace DevExtreme.NETCore.Demos.Controllers {
public class ToastController : Controller {
public ActionResult Stack() {
return View();
}
}
}
.options {
padding: 20px;
background-color: rgba(191, 191, 191, 0.15);
position: absolute;
right: 0;
top: 0;
width: 260px;
display: flex;
flex-direction: column;
gap: 5px;
}
.section {
width: 100%;
display: flex;
justify-content: space-between;
}
Specify Position
You can set the position field to a string (select 'predefined' in the radio group) or an object (select 'coordinates' in the radio group). Note that if you use coordinates for the position field, you need to specify one vertical and one horizontal coordinate only. For example, if you specify 'top', the demo disables the 'bottom' field, and vice versa.
Specify Direction
The direction field specifies two options: which way the notification stack grows and whether new notifications appear at the end or at the beginning of the line. For this reason, the field's pull-down menu choices show pairs of values such as 'up-push' and 'up-stack'.
-
'up-push'
New toasts push the previous toasts upwards. -
'up-stack'
Toasts stack on top of each other.
Hide Toasts
To hide all toast messages, use the hideToasts method.