You can use the maxDisplayedTags property to limit the number of displayed tags. When the specified limit is exceeded, the tags are combined into a single multi-tag that displays the number of selected items. Use the showMultiTagOnly property to specify whether to display a multi-tag only or other tags as well. You can also use onMultiTagPreparing event handler to customize the multi-tag, as shown in the second example.
@model IEnumerable<DevExtreme.MVC.Demos.Models.ElectronicsItem>
<div class="dx-fieldset">
<div class="dx-field">
<div class="dx-field-label">
Multi-tag for several items
</div>
<div class="dx-field-value">
@(Html.DevExtreme().TagBox()
.DataSource(Model)
.Value(new[] { 1, 2, 3, 4 })
.DisplayExpr("Name")
.InputAttr("aria-label", "Product")
.ValueExpr("ID")
.ShowSelectionControls(true)
.MaxDisplayedTags(3)
)
</div>
</div>
<div class="dx-field">
<div class="dx-field-label">
Multi-tag for all items
</div>
<div class="dx-field-value">
@(Html.DevExtreme().TagBox()
.DataSource(Model.Take(5))
.Value(new[] { 1, 2, 3, 4, 5 })
.DisplayExpr("Name")
.InputAttr("aria-label", "Product")
.ValueExpr("ID")
.ShowSelectionControls(true)
.MaxDisplayedTags(3)
.OnMultiTagPreparing("OnMultiTagPreparing")
)
</div>
</div>
<div class="dx-field">
<div class="dx-field-label">
Multi-tag with ordinary tags
</div>
<div class="dx-field-value">
@(Html.DevExtreme().TagBox()
.DataSource(Model)
.Value(new[] { 1, 2, 3, 4, 5, 6, 7 })
.DisplayExpr("Name")
.ValueExpr("ID")
.InputAttr("aria-label", "Product")
.ShowSelectionControls(true)
.MaxDisplayedTags(2)
.ShowMultiTagOnly(false)
)
</div>
</div>
</div>
<script>
function OnMultiTagPreparing(args) {
var selectedItemsLength = args.selectedItems.length,
totalCount = 5;
if (selectedItemsLength < totalCount) {
args.cancel = true;
} else {
args.text = "All selected (" + selectedItemsLength + ")";
}
}
</script>
using DevExtreme.AspNet.Data;
using DevExtreme.AspNet.Mvc;
using DevExtreme.MVC.Demos.Models.SampleData;
using DevExtreme.MVC.Demos.ViewModels;
using System.Linq;
using System.Text.Json;
using System.Web.Mvc;
namespace DevExtreme.MVC.Demos.Controllers {
public class TagBoxController : Controller {
public ActionResult TagCountLimitation() {
return View(SampleData.Electronics);
}
}
}using System;
using System.Collections.Generic;
namespace DevExtreme.MVC.Demos.Models.SampleData {
public partial class SampleData {
public static readonly IEnumerable<ElectronicsItem> Electronics = new[] {
new ElectronicsItem {
ID = 1,
Name = "HD Video Player",
Price = 330,
CurrentInventory = 225,
Backorder = 0,
Manufacturing = 10,
Category = "Video Players",
ImageSrc = "../../Content/images/products/1-small.png",
IconSrc = "../../Content/images/icons/video-player.svg"
},
new ElectronicsItem {
ID = 2,
Name = "SuperHD Player",
Price = 400,
CurrentInventory = 150,
Backorder = 0,
Manufacturing = 25,
Category = "Video Players",
ImageSrc = "../../Content/images/products/2-small.png",
IconSrc = "../../Content/images/icons/video-player.svg"
},
new ElectronicsItem {
ID = 3,
Name = "SuperPlasma 50",
Price = 2400,
CurrentInventory = 0,
Backorder = 0,
Manufacturing = 0,
Category = "Televisions",
ImageSrc = "../../Content/images/products/3-small.png",
IconSrc = "../../Content/images/icons/tv.svg"
},
new ElectronicsItem {
ID = 4,
Name = "SuperLED 50",
Price = 1600,
CurrentInventory = 77,
Backorder = 0,
Manufacturing = 55,
Category = "Televisions",
ImageSrc = "../../Content/images/products/4-small.png",
IconSrc = "../../Content/images/icons/tv.svg"
},
new ElectronicsItem {
ID = 5,
Name = "SuperLED 42",
Price = 1450,
CurrentInventory = 445,
Backorder = 0,
Manufacturing = 0,
Category = "Televisions",
ImageSrc = "../../Content/images/products/5-small.png",
IconSrc = "../../Content/images/icons/tv.svg"
},
new ElectronicsItem {
ID = 6,
Name = "SuperLED 55",
Price = 1350,
CurrentInventory = 345,
Backorder = 0,
Manufacturing = 5,
Category = "Televisions",
ImageSrc = "../../Content/images/products/6-small.png",
IconSrc = "../../Content/images/icons/tv.svg"
},
new ElectronicsItem {
ID = 7,
Name = "SuperLCD 42",
Price = 1200,
CurrentInventory = 210,
Backorder = 0,
Manufacturing = 20,
Category = "Televisions",
ImageSrc = "../../Content/images/products/7-small.png",
IconSrc = "../../Content/images/icons/tv.svg"
},
new ElectronicsItem {
ID = 8,
Name = "SuperPlasma 65",
Price = 3500,
CurrentInventory = 0,
Backorder = 0,
Manufacturing = 0,
Category = "Televisions",
ImageSrc = "../../Content/images/products/8-small.png",
IconSrc = "../../Content/images/icons/tv.svg"
},
new ElectronicsItem {
ID = 9,
Name = "SuperLCD 70",
Price = 4000,
CurrentInventory = 95,
Backorder = 0,
Manufacturing = 5,
Category = "Televisions",
ImageSrc = "../../Content/images/products/9-small.png",
IconSrc = "../../Content/images/icons/tv.svg"
},
new ElectronicsItem {
ID = 10,
Name = "DesktopLED 21",
Price = 175,
CurrentInventory = 0,
Backorder = 425,
Manufacturing = 75,
Category = "Monitors",
ImageSrc = "../../Content/images/products/10-small.png",
IconSrc = "../../Content/images/icons/tv.svg"
},
new ElectronicsItem {
ID = 11,
Name = "DesktopLED 19",
Price = 165,
CurrentInventory = 425,
Backorder = 0,
Manufacturing = 110,
Category = "Monitors",
ImageSrc = "../../Content/images/products/11-small.png",
IconSrc = "../../Content/images/icons/tv.svg"
},
new ElectronicsItem {
ID = 12,
Name = "DesktopLCD 21",
Price = 170,
CurrentInventory = 210,
Backorder = 0,
Manufacturing = 60,
Category = "Monitors",
ImageSrc = "../../Content/images/products/12-small.png",
IconSrc = "../../Content/images/icons/tv.svg"
},
new ElectronicsItem {
ID = 13,
Name = "DesktopLCD 19",
Price = 160,
CurrentInventory = 150,
Backorder = 0,
Manufacturing = 210,
Category = "Monitors",
ImageSrc = "../../Content/images/products/13-small.png",
IconSrc = "../../Content/images/icons/tv.svg"
},
new ElectronicsItem {
ID = 14,
Name = "Projector Plus",
Price = 550,
CurrentInventory = 0,
Backorder = 55,
Manufacturing = 10,
Category = "Monitors",
ImageSrc = "../../Content/images/products/14-small.png",
IconSrc = "../../Content/images/icons/video-player.svg"
},
new ElectronicsItem {
ID = 15,
Name = "Projector PlusHD",
Price = 750,
CurrentInventory = 110,
Backorder = 0,
Manufacturing = 90,
Category = "Projectors",
ImageSrc = "../../Content/images/products/15-small.png",
IconSrc = "../../Content/images/icons/video-player.svg"
},
new ElectronicsItem {
ID = 16,
Name = "Projector PlusHT",
Price = 1050,
CurrentInventory = 0,
Backorder = 75,
Manufacturing = 57,
Category = "Projectors",
ImageSrc = "../../Content/images/products/16-small.png",
IconSrc = "../../Content/images/icons/video-player.svg"
},
new ElectronicsItem {
ID = 17,
Name = "ExcelRemote IR",
Price = 150,
CurrentInventory = 650,
Backorder = 0,
Manufacturing = 190,
Category = "Automation",
ImageSrc = "../../Content/images/products/17-small.png",
IconSrc = "../../Content/images/icons/video-player.svg"
},
new ElectronicsItem {
ID = 18,
Name = "ExcelRemote BT",
Price = 180,
CurrentInventory = 310,
Backorder = 0,
Manufacturing = 0,
Category = "Automation",
ImageSrc = "../../Content/images/products/18-small.png",
IconSrc = "../../Content/images/icons/video-player.svg"
},
new ElectronicsItem {
ID = 19,
Name = "ExcelRemote IP",
Price = 200,
CurrentInventory = 0,
Backorder = 325,
Manufacturing = 225,
Category = "Automation",
ImageSrc = "../../Content/images/products/19-small.png",
IconSrc = "../../Content/images/icons/video-player.svg"
}
};
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace DevExtreme.MVC.Demos.Models {
public class ElectronicsItem {
public int ID { get; set; }
public string Category { get; set; }
public string Name { get; set; }
public int CurrentInventory { get; set; }
public int Backorder { get; set; }
public int Manufacturing { get; set; }
public int Price { get; set; }
public string ImageSrc { get; set; }
public string IconSrc { get; set; }
}
}
.dx-field {
margin-bottom: 50px;
}