如何为Blazor DevExpress dxComboBox设置属性及开启输入自动完成功能？

Hey there! I’ve worked with DevExpress’s Blazor components quite a bit, so let me clear this up for you—dxComboBox absolutely supports auto-complete matching when users type, it just doesn’t use a direct autocomplete property name. Instead, it uses a set of dedicated properties to configure this behavior. Here’s how to set it up:

Key Properties to Enable Auto-Complete #

• FilteringMode: This controls how the component matches user input against your data source. Choose from:
  • FilteringMode.StartsWith: Matches items that start with the typed text (great for precise prefix-based searches)
  • FilteringMode.Contains: Matches items that include the typed text anywhere in the value (more flexible for broad searches)
• ShowFilteringUI: Set this to true if you want a dedicated filter input box above the dropdown. If you prefer users to type directly into the combo box’s main input area to trigger filtering, you can set this to false (the dropdown will still auto-filter as they type).
• MinLength: Optional, but useful to prevent excessive filtering. Set the minimum number of characters a user must type before the component starts filtering results (e.g., MinLength="2").

Example Implementation #

Here’s a quick code snippet showing these properties in action:

<DxComboBox Data="@FruitOptions"
            @bind-Value="@SelectedFruit"
            FilteringMode="FilteringMode.Contains"
            MinLength="1"
            Placeholder="Type to find a fruit...">
</DxComboBox>

@code {
    private List<string> FruitOptions = new List<string> { 
        "Apple", "Banana", "Blueberry", "Cherry", "Date", "Elderberry", "Fig" 
    };
    private string SelectedFruit { get; set; }
}

How It Works #

In this example, as soon as the user types a single character, the dropdown will automatically show only the fruits that contain that character. If you switch FilteringMode to StartsWith, it’ll only show fruits starting with the typed text instead.

If you want a separate filter box (instead of typing directly into the combo box input), just add ShowFilteringUI="true" to the component—this adds a small input field above the dropdown list for filtering.

内容的提问来源于stack exchange，提问作者QuestionHelp