Pre-Selecting Item

This article provides an example that demonstrates how to pre-select an item for the end-user when the component initializes. The described approach allows you to pre-select an item only if it exists in the data source.

Pre-select item for the user

@* Pre-select an item. *@

Selected value: @selectedValue
<br />

<TelerikComboBox Data="@myComboData" TextField="MyTextField" ValueField="MyValueField" @bind-Value="selectedValue"
                 Placeholder="Select an item..." ShowClearButton="true" Filterable="true">
</TelerikComboBox>

@code {
    int selectedValue { get; set; }

    //Define a preselected value when the component initializes. 
    //Placeholder will not be shown as the selected value is defined.
    protected override void OnInitialized()
    {
        selectedValue = 3;
    }

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

    //in a real case, the model is usually in a separate file
    //the model type and value field type must be provided to the dropdpownlist
    public class MyDdlModel
    {
        public int MyValueField { get; set; }
        public string MyTextField { get; set; }
    }
}