Appearance Settings

You can control the appearance of the MultiColumnComboBox by setting the following attributes:

• Size
• Rounded
• FillMode

Size

You can increase or decrease the size of the MultiColumnComboBox by setting the Size attribute to a member of the Telerik.Blazor.ThemeConstants.ComboBox.Size class:

Class members	Manual declarations
Small	sm
Medium	md
Large	lg

The built-in sizes

@{
    var fields = typeof(Telerik.Blazor.ThemeConstants.ComboBox.Size)
        .GetFields(System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Static
        | System.Reflection.BindingFlags.FlattenHierarchy)
        .Where(field => field.IsLiteral && !field.IsInitOnly).ToList();

    foreach (var field in fields)
    {
        string size = field.GetValue(null).ToString();

        <div style="float:left; margin: 20px;">
            <TelerikMultiColumnComboBox Data="@myComboData"
                                Size="@size"
                                TextField="MyTextField"
                                ValueField="MyValueField"
                                    @bind-Value="selectedValue"
                                Placeholder="Select an item..."
                                ClearButton="true"
                                Filterable="true">
                <MultiColumnComboBoxColumns>
                    <MultiColumnComboBoxColumn Field="@nameof(MyDdlModel.MyTextField)"></MultiColumnComboBoxColumn>
                    <MultiColumnComboBoxColumn Field="@nameof(MyDdlModel.MyValueField)"></MultiColumnComboBoxColumn>
                </MultiColumnComboBoxColumns>
            </TelerikMultiColumnComboBox>
        </div>
    }
}

@code {
    IEnumerable<MyDdlModel> myComboData = Enumerable.Range(1, 20).Select(x => new MyDdlModel { MyTextField = "item " + x, MyValueField = x });

    int selectedValue { get; set; }

    protected override void OnInitialized()
    {
        selectedValue = 3;
    }

    public class MyDdlModel
    {
        public int MyValueField { get; set; }
        public string MyTextField { get; set; }
    }
}

Rounded

The Rounded attribute applies the border-radius CSS rule to the MultiColumnComboBox to achieve curving of the edges. You can set it to a member of the Telerik.Blazor.ThemeConstants.ComboBox.Rounded class:

Class members	Manual declarations
Small	sm
Medium	md
Large	lg
Full	full

The built-in values of the Rounded attribute

@* The built-in values of the Rounded attribute.  *@

@{
    var fields = typeof(Telerik.Blazor.ThemeConstants.ComboBox.Rounded)
        .GetFields(System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Static
        | System.Reflection.BindingFlags.FlattenHierarchy)
        .Where(field => field.IsLiteral && !field.IsInitOnly).ToList();

    foreach (var field in fields)
    {
        string rounded = field.GetValue(null).ToString();

        <div style="float:left; margin: 20px;">
            <TelerikMultiColumnComboBox Data="@myComboData"
                                Rounded="@rounded"
                                TextField="MyTextField"
                                ValueField="MyValueField"
                                @bind-Value="selectedValue"
                                Placeholder="Select an item..."
                                ClearButton="true"
                                Filterable="true">
                <MultiColumnComboBoxColumns>
                    <MultiColumnComboBoxColumn Field="@nameof(MyDdlModel.MyTextField)"></MultiColumnComboBoxColumn>
                    <MultiColumnComboBoxColumn Field="@nameof(MyDdlModel.MyValueField)"></MultiColumnComboBoxColumn>
                </MultiColumnComboBoxColumns>
            </TelerikMultiColumnComboBox>
        </div>
    }
}

@code {
    IEnumerable<MyDdlModel> myComboData = Enumerable.Range(1, 20).Select(x => new MyDdlModel { MyTextField = "item " + x, MyValueField = x });

    int selectedValue { get; set; }

    protected override void OnInitialized()
    {
        selectedValue = 3;
    }

    public class MyDdlModel
    {
        public int MyValueField { get; set; }
        public string MyTextField { get; set; }
    }
}

FillMode

The FillMode controls how the TelerikMultiColumnComboBox is filled. You can set it to a member of the Telerik.Blazor.ThemeConstants.ComboBox.FillMode class:

Class members	Result
Solid default value	solid
Flat	flat
Outline	outline

The built-in Fill modes

@* These are all built-in fill modes *@

@{
    var fields = typeof(Telerik.Blazor.ThemeConstants.ComboBox.FillMode)
        .GetFields(System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Static
        | System.Reflection.BindingFlags.FlattenHierarchy)
        .Where(field => field.IsLiteral && !field.IsInitOnly).ToList();

    foreach (var field in fields)
    {
        string fillMode = field.GetValue(null).ToString();

        <div style="float:left; margin: 20px;">
            <TelerikMultiColumnComboBox Data="@myComboData"
                                FillMode="@fillMode"
                                TextField="MyTextField"
                                ValueField="MyValueField"
                                @bind-Value="selectedValue"
                                Placeholder="Select an item..."
                                ClearButton="true"
                                Filterable="true">
                <MultiColumnComboBoxColumns>
                    <MultiColumnComboBoxColumn Field="@nameof(MyDdlModel.MyTextField)"></MultiColumnComboBoxColumn>
                    <MultiColumnComboBoxColumn Field="@nameof(MyDdlModel.MyValueField)"></MultiColumnComboBoxColumn>
                </MultiColumnComboBoxColumns>
            </TelerikMultiColumnComboBox>
        </div>
    }
}

@code {
    IEnumerable<MyDdlModel> myComboData = Enumerable.Range(1, 20).Select(x => new MyDdlModel { MyTextField = "item " + x, MyValueField = x });

    int selectedValue { get; set; }

    protected override void OnInitialized()
    {
        selectedValue = 3;
    }

    public class MyDdlModel
    {
        public int MyValueField { get; set; }
        public string MyTextField { get; set; }
    }
}

ThemeBuilder

To take full control over the appearance of the Telerik UI for Blazor components, you can create your own styles by using ThemeBuilder.

ThemeBuilder is a web application that enables you to create new themes and customize existing ones. Every change that you make is visualized almost instantly. Once you are done styling the UI components, you can export a ZIP file with the styles for your theme and use them in your Blazor app.