ComboBox for Blazor - Bind to an enumeration

This example demonstrates how to create a wrapper class that obtains enumeration values and passes them to the ComboBox component's Data property.

Overview

Follow the steps below to bind the ComboBox component to an enumeration:

1. Create a wrapper class with two properties that specify an enumeration value and a text string that the ComboBox displays.

   public class EducationDegree {
       // Specifies an enumeration value
       public EducationType Value { get; set; }
       // Specifies a text string
       public string DisplayName { get; set; }
   }

2. Create a generic extension method that gets the DisplayAttribute.Name property value from the enumeration's member.

3. Add the ComboBox component to your project and override the OnInitialized lifecycle method. This method creates a match between enumeration member integer and string values.

   @code {
       // ...
   
       protected override void OnInitialized() {
           //...
           EducationDegrees = Enum.GetValues(typeof(EducationType))
               .OfType<EducationType>()
               .Select(t => new EducationDegree()
               {
                   Value = t,
                   DisplayName = t.GetAttribute<DisplayAttribute>().Name
               }).ToList();
           base.OnInitialized();
       }
   }

Files to Review

• Combobox.razor
• Education.cs

Documentation

• DxComboBox - Bind to an Enumeration

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