让用户通过按钮更改身份登录的背景？- Blazor

@page "/login"

<h3>Login</h3>

<div class="background" style="background-image: url('@backgroundImageUrl')">
    <!-- Background content -->
</div>

<button class="btn" @onclick="ChangeBackground">Change Background</button>

@code {
    private string backgroundImageUrl = "default.jpg";

    private void ChangeBackground()
    {
        // Logic to change the background image URL or style
        // You can use conditional statements or random selection to change the background

        // Example: Change background image URL
        if (backgroundImageUrl == "default.jpg")
        {
            backgroundImageUrl = "new-background.jpg";
        }
        else
        {
            backgroundImageUrl = "default.jpg";
        }
    }
}