这就是我所拥有的
我有一个视图组件
DescriptorExtractor_create()控制器为
public class TestViewComponent : ViewComponent
{
public async Task<IViewComponentResult> InvokeAsync(int param1, int param2)
{
return Content(param1.ToString() + param2);
}
}
当我拨打第一个public class HomeController : Controller
{
private Dictionary<string, object> _dict = new Dictionary<string, object>();
public IActionResult Index()
{
_dict = new Dictionary<string, object>() { ["param1"] = 100, ["param2"] = 200 };
return ViewComponent("Test", _dict)
}
public IActionResult Index1()
{
var obj = new { param1 = 100, param2 = 200 };
var objString = JsonConvert.SerializeObject(obj);
_dict = JsonConvert.DeserializeObject<Dictionary<string, object>>(objString);
return ViewComponent("Test", _dict);
}
}
动作时，一切都很好。它按预期工作，但当我调用Index操作时，我得到一个错误，其中包含以下堆栈跟踪
Index1反序列化后似乎存在一些问题。甚至在调用视图组件的System.InvalidCastException: Unable to cast object of type 'System.Int64' to type 'System.Int32'.
at lambda_method(Closure , Object , Object[] )
at Microsoft.AspNetCore.Mvc.ViewComponents.DefaultViewComponentInvoker.<InvokeAsyncCore>d__6.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.AspNetCore.Mvc.ViewComponents.DefaultViewComponentInvoker.<InvokeAsync>d__5.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.AspNetCore.Mvc.ViewComponents.DefaultViewComponentHelper.<InvokeCoreAsync>d__12.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.AspNetCore.Mvc.ViewFeatures.Internal.ViewComponentResultExecutor.<ExecuteAsync>d__6.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.<InvokeResultAsync>d__30.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.<InvokeNextResultFilterAsync>d__28.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.Rethrow(ResultExecutedContext context)
at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.<InvokeNextResourceFilter>d__22.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.Rethrow(ResourceExecutedContext context)
at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.<InvokeAsync>d__20.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.AspNetCore.Builder.RouterMiddleware.<Invoke>d__4.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.<Invoke>d__6.MoveNext()
方法之前抛出异常。
我被困在这一段时间了。任何帮助将非常感激。
感谢。
答案 0 :(得分：0)
错误信息几乎可以说明这里发生了什么。反序列化字典中的实际object是Int64 s，ViewComponent所期望的参数为Int32（在C＃中也称为int。< / p>