我在.razor中有如下代码。在我拿起文件后，输入字段不会立即显示路径。但如果我再次单击按钮，路径会突然显示。我如何更改代码？

<div>

    <label for="inputdata">Input Data:</label>
    <input type="text" name="inputdata" value="@filePath" />
    <button @onclick="OpenFileAsync">Open</button>

</div>

@code {

    private string filePath;

    public async void OpenFileAsync()
    {
        var customFileType = new FilePickerFileType(
            new Dictionary<DevicePlatform, IEnumerable<string>>
                {
                { DevicePlatform.WinUI, new[] { "jpg" } },
                }
        );

        PickOptions options = new()
        {
            PickerTitle = "Please select a comic file",
            FileTypes = customFileType,
        };
        var result = await FilePicker.Default.PickAsync(options);
        if (result != null)
        {
            filePath = result.FullPath;
        }
    }
}

字符串