发生js调用错误

[starrysky1211]

我使用的是.net core 3.1，根据教程安装后，在razor中试图调用时报错：
Microsoft.JSInterop.JSException: Could not find '$' in 'window'.

[starrysky1211]

可以用如下方式复现：
安装.net core 3.1
创建serverside Blazor新应用
按照教程安装BootStrapBlazor
在razor中调用</>
以下是我出错的Razor组件

@page "/hello"
@inject IModalService Modal

<h3>PLCProcess</h3>
<p>Status:    @controller_result</p>
<hr />
    <button @onclick="connect">connect</button>
    <button @onclick="refresh">refresh</button>
    <button @onclick="refresh">update</button>
    <form method="post">
        <table class="table">
            <thead>
                <tr>
                    <th>Node Name</th>
                    <th>Real-time Value</th>
                    <th>Update Target</th>
                </tr>
            </thead>
            <tbody>
                <tr>
                    <td>ActualPosition</td>
                    <td>@opcStatus.ActualPosition</td>
                    <td>
                        <BootstrapInput TItem="string" placeholder="@opcStatus.ActualPosition" @bind-Value="@ActualPositionTarget"></BootstrapInput>
                    </td>
                </tr>
                <tr>
                    <td>DeviceStatus</td>
                    <td>@opcStatus.DeviceStatus</td>
                    <td>
                        <!--<BootstrapInput TItem="string" placeholder="@opcStatus.DeviceStatus" @bind-Value="@DeviceStatusTarget">
    </BootstrapInput>-->
                    </td>
                </tr>
                <tr>
                    <td>MotionStatus</td>
                    <td>@opcStatus.MotionStatus</td>
                    <td>
                        <!--<BootstrapInput TItem="string" placeholder="@opcStatus.MotionStatus" @bind-Value="@MotionStatusTarget">
    </BootstrapInput>-->
                    </td>
                </tr>
                <tr>
                    <td>PosSet</td>
                    <td>@opcStatus.PosSet</td>
                    <td>
                        <!--<BootstrapInput TItem="string" placeholder="@opcStatus.PosSet" @bind-Value="@PosSetTarget">
    </BootstrapInput>-->
                    </td>
                </tr>
                <tr>
                    <td>Start</td>
                    <td>@opcStatus.Start.ToString()</td>
                    <td>
                        <!--<Radio Items="StartItems" OnStateChanged="@handleSelect"></Radio>-->
                    </td>
                </tr>
            </tbody>
        </table>
    </form>
<hr />

@code {
    private string controller_result = "unconnected";
    private Controller.opcController opcuaTest = new Controller.opcController();
    public volatile Models.opcStatus opcStatus = new Models.opcStatus();
    private bool isConnected = false;
    // update date holder
    private string ActualPositionTarget;
    private string DeviceStatusTarget;
    private string MotionStatusTarget;
    private string PosSetTarget;
    private bool StartTarget;
    private List<SelectedItem> StartItems = new List<SelectedItem>
    {
        new SelectedItem{Text="True", Value="True", Active=true},
        new SelectedItem{Text="False", Value="False"}
    };

    protected override void OnAfterRender(bool firstRender)
    {
        if (firstRender)
        {
            controller_result = "connecting...";
            connect();
            update();
        }
    }

    private void handleSelect(CheckboxState state, SelectedItem item)
    {

    }

    async private void connect()
    {
        controller_result = "connecting...";
        await InvokeAsync(() =>
        {
            base.StateHasChanged();
        });
        isConnected = opcuaTest.Connect("");
        if (isConnected)
        {
            controller_result = "connected";
        }
        else
        {
            controller_result = "Connect Failed";
        }
    }
    async private void refresh()
    {
        try
        {
            if (isConnected)
            {
                opcStatus = opcuaTest.getStatus(opcStatus);
                await InvokeAsync(() =>
                {
                    base.StateHasChanged();
                });
            }
            else
            {
                var parameters = new ModalParameters();
                string error = "Error";
                string failstring = "Not connected to OPC";
                //parameters.Add(nameof(error), error);
                parameters.Add(nameof(failstring), failstring);
                Modal.Show<InfoModal>("Error1", parameters);
            }
        }
        catch (Exception e)
        {
            Console.WriteLine(e.Message);
        }
    }
    private void update()
    {
        Task.Run(() =>
        {
            while (true)
            {
                refresh();
                Thread.Sleep(1000);
            }
        });
    }
}

[ArgoZhang]

增加jQuery的引用

[starrysky1211]

增加jQuery的引用

我需要在razor文件中也添加jQuery的引用吗？
我是在_Host.html里面添加了貌似不行

[ArgoZhang]

你看看我的示例网站