Column Chooser in Blazor DataGrid

14 Aug 202324 minutes to read

The column chooser has options to show or hide columns dynamically. It can be enabled by defining the ShowColumnChooser as true.

@using Syncfusion.Blazor.Grids

<SfGrid DataSource="@Employees" ShowColumnChooser="true" Toolbar=@ToolbarItems>
    <GridColumns>
        <GridColumn Field=@nameof(EmployeeData.EmployeeID) TextAlign="TextAlign.Center" HeaderText="Employee ID" Width="120"></GridColumn>
        <GridColumn Field=@nameof(EmployeeData.FirstName) HeaderText="First Name" ShowInColumnChooser="false" Width="130"></GridColumn>
        <GridColumn Field=@nameof(EmployeeData.LastName) HeaderText="Last Name" Width="130"></GridColumn>
        <GridColumn Field=@nameof(EmployeeData.Title) HeaderText="Title" Width="120"></GridColumn>
        <GridColumn Field=@nameof(EmployeeData.HireDate) HeaderText="Hire Date" Format="d" TextAlign="TextAlign.Right" Width="150"></GridColumn>
    </GridColumns>
</SfGrid>

@code{
    public string[] ToolbarItems = new string[] { "ColumnChooser" };

    public List<EmployeeData> Employees { get; set; }

    protected override void OnInitialized()
    {
        Employees = Enumerable.Range(1, 9).Select(x => new EmployeeData()
        {
            EmployeeID = x,
            FirstName = (new string[] { "Nancy", "Andrew", "Janet", "Margaret", "Steven" })[new Random().Next(5)],
            LastName = (new string[] { "Davolio", "Fuller", "Leverling", "Peacock", "Buchanan" })[new Random().Next(5)],
            Title = (new string[] { "Sales Representative", "Vice President, Sales", "Sales Manager",
                                    "Inside Sales Coordinator" })[new Random().Next(4)],
            HireDate = DateTime.Now.AddDays(-x),
        }).ToList();
    }

    public class EmployeeData
    {
        public int? EmployeeID { get; set; }
        public string FirstName { get; set; }
        public string LastName { get; set; }
        public string Title { get; set; }
        public DateTime? HireDate { get; set; }
    }
}

NOTE

You can hide the column names in column chooser by defining the ShowInColumnChooser property as false.

The following GIF represents the column chooser functionality in DataGrid

Open column chooser by external button

The column chooser has options to show or hide columns dynamically. It can be enabled by defining the ShowColumnChooser as true.

In this following example, we have opened column chooser using external button click.

@using Syncfusion.Blazor.Buttons
@using Syncfusion.Blazor.Grids

<SfButton OnClick="Show" CssClass="e-primary" IsPrimary="true" Content="Open column chooser"></SfButton>

<SfGrid @ref="DefaultGrid" DataSource="@Employees" ShowColumnChooser="true" Toolbar=@ToolbarItems>
    <GridColumns>
        <GridColumn Field=@nameof(EmployeeData.EmployeeID) TextAlign="TextAlign.Center" HeaderText="Employee ID" Width="120"></GridColumn>
        <GridColumn Field=@nameof(EmployeeData.FirstName) HeaderText="First Name" ShowInColumnChooser="false" Width="130"></GridColumn>
        <GridColumn Field=@nameof(EmployeeData.LastName) HeaderText="Last Name" Width="130"></GridColumn>
        <GridColumn Field=@nameof(EmployeeData.Title) HeaderText="Title" Width="120"></GridColumn>
        <GridColumn Field=@nameof(EmployeeData.HireDate) HeaderText="Hire Date" Format="d" TextAlign="TextAlign.Right" Width="150"></GridColumn>
    </GridColumns>
</SfGrid>

@code{
    private SfGrid<EmployeeData> DefaultGrid;

    public string[] ToolbarItems = new string[] { "ColumnChooser" };

    public List<EmployeeData> Employees { get; set; }

    protected override void OnInitialized()
    {
        Employees = Enumerable.Range(1, 9).Select(x => new EmployeeData()
        {
            EmployeeID = x,
            FirstName = (new string[] { "Nancy", "Andrew", "Janet", "Margaret", "Steven" })[new Random().Next(5)],
            LastName = (new string[] { "Davolio", "Fuller", "Leverling", "Peacock", "Buchanan" })[new Random().Next(5)],
            Title = (new string[] { "Sales Representative", "Vice President, Sales", "Sales Manager",
                                    "Inside Sales Coordinator" })[new Random().Next(4)],
            HireDate = DateTime.Now.AddDays(-x),
        }).ToList();
    }

    public void Show()
    {
        this.DefaultGrid.OpenColumnChooser(200, 50);
    }

    public class EmployeeData
    {
        public int? EmployeeID { get; set; }
        public string FirstName { get; set; }
        public string LastName { get; set; }
        public string Title { get; set; }
        public DateTime? HireDate { get; set; }
    }
}

The following GIF represents opening column chooser functionality in DataGrid using external button.

Column chooser template

Using the column chooser template, you can customize the column chooser dialog using Template and FooterTemplate of the GridColumnChooserSettings component. You can access the parameters passed to the templates using implicit parameter named context.

Customize the content of column chooser

The Template tag in the GridColumnChooserSettings component is used to customize the content in the column chooser dialog. You can type cast the context as ColumnChooserTemplateContext to get columns inside content template.

@using Syncfusion.Blazor.Grids;
@using Model

<SfGrid ID="Grid" @ref="Grid" AllowPaging="true" DataSource="@Orders" ShowColumnChooser="true" Toolbar="@ToolbarItems">
    <GridColumnChooserSettings>
        <Template>
                @{
                    var ContextData = context as ColumnChooserTemplateContext;
                    <CustomComponent @key="ContextData.Columns.Count" ColumnContext="ContextData"></CustomComponent>
                }
        </Template>
    </GridColumnChooserSettings>
    <GridColumns>
        <GridColumn Field=@nameof(Order.OrderID) HeaderText="Order ID" TextAlign="TextAlign.Right" Width="120"> </GridColumn>
        <GridColumn Field=@nameof(Order.CustomerID) HeaderText="Customer ID" Width="150"> </GridColumn>
        <GridColumn Field=@nameof(Order.OrderDate) HeaderText="Order Date" Visible="false" Format="d" Type="ColumnType.Date" TextAlign="TextAlign.Right" Width="130"></GridColumn>
        <GridColumn Field=@nameof(Order.Freight) Visible="false" HeaderText="Freight" Format="C2" TextAlign="TextAlign.Right" Width="120"></GridColumn>
        <GridColumn Field=@nameof(Order.EmployeeID) Visible="false" HeaderText="Employee ID" TextAlign="TextAlign.Right" Width="120"> </GridColumn>
        <GridColumn Field=@nameof(Order.FirstName) Visible="false" HeaderText="First Name" Width="150"> </GridColumn>
        <GridColumn Field=@nameof(Order.LastName) HeaderText="Last Name" Visible="false" Format="d" Type="ColumnType.Date" Width="130"> </GridColumn>
        <GridColumn Field=@nameof(Order.Title) HeaderText="Title" Visible="false"  Width="120"> </GridColumn>
        <GridColumn Field=@nameof(Order.HireDate) HeaderText="Hire Date" TextAlign="TextAlign.Right" Width="120"></GridColumn>
    </GridColumns>
</SfGrid>

<style>
    #Grid.e-grid .e-ccdlg .e-dlg-content {
        margin-top: 0px;
    }

    .e-list-item.e-level-1.e-checklist.e-focused {
        background-color: none;
    }

    #Grid_ccdlg .e-content {
        overflow-y: unset;
    }
</style>

@code
{
    public SfGrid<Order> Grid { get; set; }
    public string[] ToolbarItems = new string[] { "ColumnChooser" };
    public List<Order> Orders { get; set; }

    protected override void OnInitialized()
    {
        Orders = Enumerable.Range(1, 500).Select(x => new Order()
        {
            OrderID = 1000 + x,
            CustomerID = (new string[] { "ALFKI", "ANANTR", "ANTON", "BLONP", "BOLID" })[new Random().Next(5)],
            Freight = 2.1 * x,
            OrderDate = DateTime.Now.AddDays(-x),
            EmployeeID = x,
            FirstName = (new string[] { "Nancy", "Andrew", "Janet", "Margaret", "Steven" })[new Random().Next(5)],
            LastName = (new string[] { "Davolio", "Fuller", "Leverling", "Peacock", "Buchanan" })[new Random().Next(5)],
            Title = (new string[] { "Sales Representative", "Vice President, Sales", "Sales Manager", "Inside Sales Coordinator" })[new Random().Next(4)],
            HireDate = DateTime.Now.AddDays(-x),
        }).ToList();
    }
}

NOTE

• You can build reusable custom component based on your customization need as like above code example.
  
  * In the above example, Syncfusion ListView component is used as custom component in the content template to show/hide columns.

@using Syncfusion.Blazor.Lists;
@using Syncfusion.Blazor.Inputs;
@using Model

<div class="setMargin">
    <SfTextBox Placeholder="Search" Input="@OnInput"></SfTextBox>
</div>

<SfListView @ref="ListView" Height="100%" ShowCheckBox="true" DataSource="@CloneData">
    <ListViewFieldSettings TValue="DataModel" Id="Id" Text="Text" ></ListViewFieldSettings>
    <ListViewEvents Clicked="OnClicked" Created="@(()=>OnCreated(ColumnContext.Columns))" TValue="DataModel"></ListViewEvents>
</SfListView>

<style>
    .setMargin{
        margin-bottom: 10px;
    }
</style>

@code
{
    public List<DataModel> CloneData { get; set; } = new List<DataModel>();

    [CascadingParameter]
    public SfGrid<Order> Grid { get; set; }

    [Parameter]
    public ColumnChooserTemplateContext ColumnContext { get; set; }

    public SfListView<DataModel> ListView { get; set; }

    async Task OnInput(InputEventArgs eventArgs)
    {
        CloneData = DataSource.FindAll(e => e.Text.ToLower().StartsWith(eventArgs.Value.ToLower()));
        await Task.Delay(100);
        await Preselect();
    }

    protected override async Task OnInitializedAsync()
    {
        CloneData = DataSource;
        await Task.Delay(100);
        await Preselect();
    }

    List<DataModel> DataSource = new List<DataModel>
    {
        new DataModel() { Text = "Order ID", Id = "OrderID" },
        new DataModel() { Text = "Customer ID", Id ="CustomerID"},
        new DataModel() { Text = "Employee ID", Id = "EmployeeID" },
        new DataModel() { Text = "First Name", Id = "FirstName"},
        new DataModel() { Text = "Order Date", Id = "OrderDate" },
        new DataModel() { Text = "Last Name", Id = "LastName" },
        new DataModel() { Text = "Hire Date", Id = "HireDate"},
        new DataModel() { Text = "Title", Id = "Title"},
        new DataModel() { Text = "Freight", Id = "Freight"},
    };

    public async Task Preselect()
    {
        var cols = ColumnContext.Columns.FindAll(x => x.Visible == true).ToList();
        var selectlist = new List<DataModel>();
        foreach (var column in cols)
        {
            selectlist.Add(DataSource.Where(x => x.Text == column.HeaderText).FirstOrDefault());
        }
        if (selectlist.Count > 0)
        {
            if (ListView != null)
            {
                await ListView?.CheckItemsAsync(selectlist.AsEnumerable());
            }
        }
    }

    public async Task OnCreated(List<GridColumn> args)
    {
        await Preselect();
    }

    public async Task OnClicked(ClickEventArgs<DataModel> args)
    {
        if (args.IsChecked)
        {
            await Grid.HideColumnAsync(args.Text);
        }
        else
        {
            await Grid.ShowColumnAsync(args.Text);
        }
    }
}

NOTE

• The model class used in the above example is enclosed in the Model.cs file.

using System;

namespace Model
{
    public class DataModel
    {
        public string Id { get; set; }
        public string Text { get; set; }
        public string Type { get; set; }
    }

    public class Order
    {
        public int? OrderID { get; set; }
        public string CustomerID { get; set; }
        public DateTime? OrderDate { get; set; }
        public double? Freight { get; set; }
        public int? EmployeeID { get; set; }
        public string FirstName { get; set; }
        public string LastName { get; set; }
        public string Title { get; set; }
        public DateTime? HireDate { get; set; }
    }
}

Customize the footer of column chooser

The FooterTemplate tag in the GridColumnChooserSettings component is used to customize the footer in the column chooser dialog. You can type cast the context as ColumnChooserFooterTemplateContext to get columns inside FooterTemplate.

@using Syncfusion.Blazor.Grids
@using Syncfusion.Blazor.Buttons

<SfGrid @ref="grid" TValue="OrdersDetails" DataSource="@GridData" ShowColumnChooser="true" Toolbar="@( new List<string>() { "ColumnChooser"})" AllowPaging="true">
    <GridColumnChooserSettings>
        <FooterTemplate>
            @{
                var ContextData = context as ColumnChooserFooterTemplateContext;
                var visibles = ContextData.Columns.Where(x => x.Visible).Select(x => x.HeaderText).ToArray();
                var hiddens = ContextData.Columns.Where(x => !x.Visible).Select(x => x.HeaderText).ToArray();
            }
            <SfButton IsPrimary="true" OnClick="@(async () => {
            await grid.ShowColumnsAsync(visibles);
            await grid.HideColumnsAsync(hiddens); })">Submit</SfButton>
            <SfButton @onclick="@(async () => await ContextData.CancelAsync())">Abort</SfButton>
        </FooterTemplate>
    </GridColumnChooserSettings>
    <GridColumns>
        <GridColumn Field=@nameof(OrdersDetails.OrderID) HeaderText="Order ID" TextAlign="TextAlign.Right" IsPrimaryKey="true" Width="120"></GridColumn>
        <GridColumn Field=@nameof(OrdersDetails.CustomerID) HeaderText="Customer Name" Width="150"></GridColumn>
        <GridColumn Field=@nameof(OrdersDetails.OrderDate) HeaderText="Order Date" Format="d" Type="ColumnType.Date" TextAlign="TextAlign.Right" Width="130"></GridColumn>
        <GridColumn Field=@nameof(OrdersDetails.Freight) HeaderText="Freight" Format="C2" TextAlign="TextAlign.Right" Width="120"></GridColumn>
        <GridColumn Field=@nameof(OrdersDetails.ShippedDate) HeaderText="Shipped Date" Format="d" Type="ColumnType.Date" TextAlign="TextAlign.Right" Width="150"></GridColumn>
        <GridColumn Field=@nameof(OrdersDetails.ShipCountry) HeaderText="Ship Country" Visible="false" Width="150"></GridColumn>
        <GridColumn Field=@nameof(OrdersDetails.ShipCity) HeaderText="Ship City" Visible="false" Width="150"></GridColumn>
    </GridColumns>
</SfGrid>

@code{
    public List<OrdersDetails> GridData { get; set; }
    SfGrid<OrdersDetails> grid { get; set; }

    protected override void OnInitialized()
    {
        GridData = Enumerable.Range(1, 75).Select(x => new OrdersDetails()
        {
            OrderID = 1000 + x,
            CustomerID = (new string[] { "ALFKI", "ANANTR", "ANTON", "BLONP", "BOLID" })[new Random().Next(5)],
            Freight = 2.1 * x,
            OrderDate = DateTime.Now.AddDays(-x),
            ShippedDate = DateTime.Now.AddDays(+x),
            ShipCountry = (new string[] { "Denmark", "Brazil", "Germany", "Austria" })[new Random().Next(4)],
            ShipCity = (new string[] { "Berlin", "Madrid", "Marseille" })[new Random().Next(3)]
        }).ToList();
    }

    public class OrdersDetails
    {
        public int? OrderID { get; set; }
        public string CustomerID { get; set; }
        public DateTime? OrderDate { get; set; }
        public double? Freight { get; set; }
        public DateTime? ShippedDate { get; set; }
        public string ShipCountry { get; set; }
        public string ShipCity { get; set; }
    }
}

Customize column chooser dialog size

You can customize the height and width of the column chooser dialog by using the below CSS styles.

<style> 
    #Grid .e-dialog.e-ccdlg {         
        max-height: 600px !important; 
        width: 300px !important; 
    } 
    #Grid .e-ccdlg .e-cc-contentdiv { 
        height: 250px !important; 
        width: 250px !important;         
    } 
</style>

NOTE

Here, !important attribute is used to apply custom styles since the column chooser dialog position will be calculated dynamically based on content.

This can be demonstrated in the following sample:

@using Syncfusion.Blazor.Grids

<SfGrid DataSource="@Employees" ShowColumnChooser="true" Toolbar=@ToolbarItems ID="Grid">
    <GridColumns>
        <GridColumn Field=@nameof(EmployeeData.EmployeeID) TextAlign="TextAlign.Center" HeaderText="Employee ID" Width="120"></GridColumn>
        <GridColumn Field=@nameof(EmployeeData.FirstName) HeaderText="First Name" ShowInColumnChooser="false" Width="130"></GridColumn>
        <GridColumn Field=@nameof(EmployeeData.LastName) HeaderText="Last Name" Width="130"></GridColumn>
        <GridColumn Field=@nameof(EmployeeData.Title) HeaderText="Title" Width="120"></GridColumn>
        <GridColumn Field=@nameof(EmployeeData.HireDate) HeaderText="Hire Date" Format="d" TextAlign="TextAlign.Right" Width="150"></GridColumn>
    </GridColumns>
</SfGrid>

@code{
    public string[] ToolbarItems = new string[] { "ColumnChooser" };

    public List<EmployeeData> Employees { get; set; }

    protected override void OnInitialized()
    {
        Employees = Enumerable.Range(1, 9).Select(x => new EmployeeData()
        {
            EmployeeID = x,
            FirstName = (new string[] { "Nancy", "Andrew", "Janet", "Margaret", "Steven" })[new Random().Next(5)],
            LastName = (new string[] { "Davolio", "Fuller", "Leverling", "Peacock", "Buchanan" })[new Random().Next(5)],
            Title = (new string[] { "Sales Representative", "Vice President, Sales", "Sales Manager",
                                    "Inside Sales Coordinator" })[new Random().Next(4)],
            HireDate = DateTime.Now.AddDays(-x),
        }).ToList();
    }

    public class EmployeeData
    {
        public int? EmployeeID { get; set; }
        public string FirstName { get; set; }
        public string LastName { get; set; }
        public string Title { get; set; }
        public DateTime? HireDate { get; set; }
    }
}

<style> 
    #Grid .e-dialog.e-ccdlg {         
        max-height: 600px !important; 
        width: 300px !important; 
    } 
    #Grid .e-ccdlg .e-cc-contentdiv { 
        height: 250px !important; 
        width: 250px !important;         
    } 
</style>

Change default search operator of the column chooser

The default operator for the search box in the column chooser is StartsWith. It is possible to change the default operator using the Operator property of the GridColumnChooserSettings class.

In the following sample, the search box operator for the column chooser is set to Contains in the GridColumnChooserSettings class.

@using Syncfusion.Blazor
@using Syncfusion.Blazor.Grids

<SfGrid DataSource="@Employees" ShowColumnChooser="true" Toolbar=@ToolbarItems>
    <GridColumnChooserSettings Operator="Operator.Contains"></GridColumnChooserSettings>
    <GridColumns>
        <GridColumn Field=@nameof(EmployeeData.EmployeeID) TextAlign="TextAlign.Center" HeaderText="Employee ID" Width="120"></GridColumn>
        <GridColumn Field=@nameof(EmployeeData.FirstName) HeaderText="First Name" ShowInColumnChooser="false" Width="130"></GridColumn>
        <GridColumn Field=@nameof(EmployeeData.LastName) HeaderText="Last Name" Width="130"></GridColumn>
        <GridColumn Field=@nameof(EmployeeData.Title) HeaderText="Title" Width="120"></GridColumn>
        <GridColumn Field=@nameof(EmployeeData.HireDate) HeaderText="Hire Date" Format="d" TextAlign="TextAlign.Right" Width="150"></GridColumn>
    </GridColumns>
</SfGrid>

@code{
    public string[] ToolbarItems = new string[] { "ColumnChooser" };
    public List<EmployeeData> Employees { get; set; }

    protected override void OnInitialized()
    {
        Employees = Enumerable.Range(1, 9).Select(x => new EmployeeData()
        {
            EmployeeID = x,
            FirstName = (new string[] { "Nancy", "Andrew", "Janet", "Margaret", "Steven" })[new Random().Next(5)],
            LastName = (new string[] { "Davolio", "Fuller", "Leverling", "Peacock", "Buchanan" })[new Random().Next(5)],
            Title = (new string[] { "Sales Representative", "Vice President, Sales", "Sales Manager",
                                    "Inside Sales Coordinator" })[new Random().Next(4)],
            HireDate = DateTime.Now.AddDays(-x),
        }).ToList();
    }

    public class EmployeeData
    {
        public int? EmployeeID { get; set; }
        public string FirstName { get; set; }
        public string LastName { get; set; }
        public string Title { get; set; }
        public DateTime? HireDate { get; set; }
    }
}