.Net Core Blazor发生类型错误，我尝试将其转换，但不起作用

Question

错误：

  

Microsoft.CSharp.RuntimeBinder.RuntimeBinderException：无法从用法中推断出方法'System.Threading.Tasks.Task.FromResult（TResult）'的类型参数。尝试显式指定类型参数。

返回 cmsProduct。计数= = 0 错误：当方法“系统”的类型参数时。线程。任务。任务。总是从用法中推断出FromResult（TResult）

代码：

    @foreach (var item in cmsProduct)
    {
     <li>
        <h4>@item.CategoryName</h4>
        <img src="@url" alt="@item.Title"><span>ProductName</span>
     </li>
    }

@code {
 private IList<dynamic> cmsProduct = new List<dynamic>();

 protected override async Task OnParametersSetAsync()
 {
    cmsProduct = await cmsProductService.GetShowProductList(Id);
 }
}



public Task<List<dynamic>> GetShowProductList(string id)
{
    using (var scope = _serviceScopeFactory.CreateScope())
    { 
        var context = scope.ServiceProvider.GetService<CmsContext>();
        DapperContext dapperContext = new DapperContext(context);

        string sql = "SELECT p.Id,p.Title,p.ImgUrl,p.Summary,nm.Url,pc.CategoryName FROM CmsProduct p LEFT JOIN CmsNavMenu nm ON (p.NavMenuId = nm.Id) LEFT JOIN CmsProductCategory pc ON (pc.NavMenuId=nm.Id) where p.Deleted='" + false + "' and p.NavMenuId='" + id + "'";

        IEnumerable<dynamic> dynamicResults = dapperContext.Query<dynamic>(sql);

        var result = dynamicResults.ToList();

        return Task.FromResult(result);
    }
}