Create dual list using Blazor ListView Component
21 Mar 202514 minutes to read
The dual list implementation consists of two ListView components that enable moving items between lists using client-side events. This guide explains how to integrate the ListView component to create a dual list.
Use cases
- Stock exchanges of two different countries
- Job applications (skill set management)
Integration of Dual List
This setup involves using two ListView components to display items. A Blazor Button facilitates data transfer between ListViews, while a textbox provides a UI for filtering items.
The dual list supports:
- Move all items from one list to another.
- Move only the selected items between lists.
- Filtering the list by using a client-side typed character.
In the ListView component, sorting is enabled using the SortOrder property, and the Clicked event allows for enabling and disabling button states through item selection.
Manipulating data
Moving All Items from First to Second List (»)
By clicking the first button, all items from the first ListView are transferred to the second, and the first list is cleared. The button activates when the first ListView contains items.
Moving All Items from Second to First List («)
Similarly, the second button moves all items from the second ListView to the first. It is enabled when the second ListView has items.
Moving Selected Items (>) and (<)
When an item is clicked in a ListView, the Clicked event activates the corresponding button to move selected items between lists.
The following example demonstrates how to manipulate data between two ListView components:
@using Syncfusion.Blazor.Inputs
@using Syncfusion.Blazor.Lists
<div id="container">
<div class="sample flex">
<div class="flex">
<div class="padding">
<SfTextBox Placeholder="Filter" Input="@(e => OnInput(e, 1))"></SfTextBox>
<SfListView DataSource="@FirstData">
<ListViewFieldSettings TValue="ListDataModel" Id="Id" Text="Text"></ListViewFieldSettings>
<ListViewEvents TValue="ListDataModel" Clicked="@(e => OnSelected(e, 1))"></ListViewEvents>
</SfListView>
</div>
<div class="flex vertical vertical__center flex__center padding">
<div class="padding">
<button disabled="@(!FirstListData.Any())" class="e-btn" @onclick="@(e => OnButtonClick(1))">@(">>")</button>
</div>
<div class="padding">
<button disabled="@(FirstSelected == null)" class="e-btn" @onclick="@(e => OnButtonClick(2))">@(">")</button>
</div>
<div class="padding">
<button disabled="@(SecondSelected == null)" class="e-btn" @onclick="@(e => OnButtonClick(3))">@("<")</button>
</div>
<div class="padding">
<button disabled="@(!SecondListData.Any())" class="e-btn" @onclick="@(e => OnButtonClick(4))">@("<<")</button>
</div>
</div>
<div class="padding">
<SfTextBox Placeholder="Filter" Input="@(e => OnInput(e, 2))"></SfTextBox>
<SfListView DataSource="@SecondData">
<ListViewFieldSettings Id="Id" Text="Text" TValue="ListDataModel"></ListViewFieldSettings>
<ListViewEvents TValue="ListDataModel" Clicked="@(e => OnSelected(e, 2))"></ListViewEvents>
</SfListView>
</div>
</div>
</div>
</div>
@code
{
List<ListDataModel> FirstData;
List<ListDataModel> SecondData;
ListDataModel FirstSelected;
ListDataModel SecondSelected;
protected override void OnInitialized()
{
FirstData = new List<ListDataModel>(FirstListData);
SecondData = new List<ListDataModel>(SecondListData);
}
void OnButtonClick(int buttonIndex)
{
switch (buttonIndex)
{
case 1:
FirstListData.ForEach(e => SecondListData.Add(e));
FirstListData.Clear();
FirstData.Clear();
FirstData = new List<ListDataModel>(FirstListData);
SecondData = new List<ListDataModel>(SecondListData);
break;
case 2:
if (FirstSelected != null)
{
SecondListData.Add(FirstSelected);
FirstListData.RemoveAt(FirstListData.FindIndex(e => e.Id == FirstSelected.Id));
FirstData = new List<ListDataModel>(FirstListData);
SecondData = new List<ListDataModel>(SecondListData);
FirstSelected = null;
}
break;
case 3:
if (SecondSelected != null)
{
FirstListData.Add(SecondSelected);
SecondListData.RemoveAt(SecondListData.FindIndex(e => e.Id == SecondSelected.Id));
FirstData = new List<ListDataModel>(FirstListData);
SecondData = new List<ListDataModel>(SecondListData);
SecondSelected = null;
}
break;
case 4:
SecondListData.ForEach(e => FirstListData.Add(e));
SecondData.Clear();
SecondListData.Clear();
SecondData = new List<ListDataModel>(SecondListData);
FirstData = new List<ListDataModel>(FirstListData);
break;
default:
break;
}
}
void OnSelected(ClickEventArgs<ListDataModel> eventArgs, int listviewIndex)
{
if (listviewIndex == 1)
{
FirstSelected = eventArgs.ItemData;
}
else
{
SecondSelected = eventArgs.ItemData;
}
}
void OnInput(InputEventArgs eventArgs, int listviewIndex)
{
if (listviewIndex == 1)
{
FirstData = FirstListData.FindAll(e => e.Text.ToLower().Contains(eventArgs.Value.ToLower()));
}
else
{
SecondData = SecondListData.FindAll(e => e.Text.ToLower().Contains(eventArgs.Value.ToLower()));
}
}
List<ListDataModel> SecondListData = new List<ListDataModel>() {
new ListDataModel {
Text = "Aston Martin One- 77",
Id = "07"
},
new ListDataModel {
Text = "Jaguar XJ220",
Id = "08"
},
new ListDataModel {
Text = "McLaren P1",
Id = "09"
},
new ListDataModel {
Text = "Ferrari LaFerrari",
Id = "14"
},
};
List<ListDataModel> FirstListData = new List<ListDataModel>() {
new ListDataModel {
Text = "Hennessey Venom",
Id = "01"
},
new ListDataModel {
Text = "Bugatti Chiron",
Id = "02"
},
new ListDataModel {
Text = "Bugatti Veyron Super Sport",
Id = "03"
},
new ListDataModel {
Text = "SSC Ultimate Aero",
Id = "04"
},
new ListDataModel {
Text = "Koenigsegg CCR",
Id = "05"
},
new ListDataModel {
Text = "McLaren F1",
Id = "06"
}
};
public class ListDataModel
{
public string Id { get; set; }
public string Text { get; set; }
}
}
<style>
.e-listview.e-lib {
box-shadow: 0 1px 4px #ddd;
border-bottom: 1px solid #ddd;
width: 250px;
}
.sample {
justify-content: center;
min-height: 280px;
}
.padding {
padding: 4px;
}
.right__align {
text-align: right;
margin-right: 8px;
padding-right: 8px;
}
.left__align {
margin-left: 8px;
padding-left: 8px;
}
.content__container {
background-color: aliceblue;
}
.flex {
display: flex;
}
.flex__center {
justify-content: center;
}
.vertical__center {
align-items: center;
}
.vertical {
flex-direction: column;
}
.flex__order__1 {
order: 1;
}
.flex__order__2 {
order: 2;
}
.flex__1 {
flex: 1;
}
.flex__2 {
flex: 2;
}
.flex__3 {
flex: 3;
}
.flex__5 {
flex: 5;
}
.flex__8 {
flex: 8;
}
.bold {
font-weight: 500;
}
.margin {
margin: 10px;
}
.small__font {
font-size: 13px;
margin: 2px 0;
}
</style>