"Object reference not set to an instance of an object" 使用绑定时

Question

html:

<input @bind="title"/>

<div id="chat-bottom-button-right-row">                
  <button @onclick="(() => RunMovie(title))">Chat</button> //I'd like to use title from input
</div>

c#代码：

[Inject]
    public IJSRuntime Js { get; set; }
    private MovieDataDetail movieDetail = null;

    string title;
    private async Task RunMovie(string title)
    {
        movieDetail = await TmdbApi.GetAllMovieInfo(title); //Object reference not set to an instance of an object
        await Js.InvokeVoidAsync("kinX").AsTask();
    }

我想使用 input 的标题。

title 即使我写东西到 input

也总是 null

Answer 1

如果你想要双向绑定（即输入从变量填充并且变量由输入更新）然后使用：

<input @bind-value=@title />

"Object reference not set to an instance of an object" 使用绑定时

"Object reference not set to an instance of an object" while using bind

blazor

blazor-webassembly