Question

我正在尝试在我的程序中创建删除功能。我按照this教程。但当我尝试删除此错误时，就出现了。

这是我从删除模型中的类。

        public bool deleteAccount(int Id) {
        using (SqlConnection conn = new SqlConnection(connectionString))
        using (SqlCommand comObj = new SqlCommand("", conn)) {
            comObj.CommandText = "DELETE FROM account WHERE userId = @userId";
            comObj.Parameters.AddWithValue("@userId", Id);
            conn.Open();
            int res = comObj.ExecuteNonQuery();
            if (res >= 1)
            {

                return true;

            }
            else
            {

                return false;
            }
        }
    }

我的删除操作控制器

public ActionResult deleteAccount()
    {
        return View();
    }

    public ActionResult deleteAccount(int id)
    {

        try
        {
            var databaseModel = new database();
            if (databaseModel.deleteAccount(id)) {
                ViewBag.AlertMsg = "Employee details deleted successfully";
            }
            return RedirectToAction("GetAllEmpDetails");
        }
        catch {
            return View();
        }

完整堆栈跟踪

[AmbiguousMatchException: The current request for action 'deleteAccount' on controller type 'accountController' is ambiguous between the following action methods: System.Web.Mvc.ActionResult deleteAccount() on type directory.Controllers.accountController System.Web.Mvc.ActionResult deleteAccount(Int32) on type directory.Controllers.accountController] System.Web.Mvc.ActionMethodSelectorBase.FindActionMethod(ControllerContext controllerContext, String actionName) +113 System.Web.Mvc.Async.ReflectedAsyncControllerDescriptor.FindAction(ControllerContext controllerContext, String actionName) +54 System.Web.Mvc.ControllerActionInvoker.FindAction(ControllerContext controllerContext, ControllerDescriptor controllerDescriptor, String actionName) +203 System.Web.Mvc.Async.AsyncControllerActionInvoker.BeginInvokeAction(ControllerContext controllerContext, String actionName, AsyncCallback callback, Object state) +136 System.Web.Mvc.Controller.<BeginExecuteCore>b__1c(AsyncCallback asyncCallback, Object asyncState, ExecuteCoreState innerState) +25 System.Web.Mvc.Async.WrappedAsyncVoid 1.CallBeginDelegate（AsyncCallback callback，Object callbackState）+30 System.Web.Mvc.Async.WrappedAsyncResultBase 1.Begin(AsyncCallback callback, Object state, Int32 timeout) +128 System.Web.Mvc.Controller.BeginExecuteCore(AsyncCallback callback, Object state) +465 System.Web.Mvc.Controller.<BeginExecute>b__14(AsyncCallback asyncCallback, Object callbackState, Controller controller) +18 System.Web.Mvc.Async.WrappedAsyncVoid 1.CallBeginDelegate（AsyncCallback callback，Object callbackState）+20 System.Web.Mvc.Async.WrappedAsyncResultBase 1.Begin(AsyncCallback callback, Object state, Int32 timeout) +128 System.Web.Mvc.Controller.BeginExecute(RequestContext requestContext, AsyncCallback callback, Object state) +374 System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.BeginExecute(RequestContext requestContext, AsyncCallback callback, Object state) +16 System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__4(AsyncCallback asyncCallback, Object asyncState, ProcessRequestState innerState) +52 System.Web.Mvc.Async.WrappedAsyncVoid 1.CallBeginDelegate（AsyncCallback callback，Object callbackState）+30 System.Web.Mvc.Async.WrappedAsyncResultBase 1.Begin(AsyncCallback callback, Object state, Int32 timeout) +128 System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContextBase httpContext, AsyncCallback callback, Object state) +384 System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContext httpContext, AsyncCallback callback, Object state) +48 System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.BeginProcessRequest(HttpContext context, AsyncCallback cb, Object extraData) +16 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +103 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155

希望有人可以帮助我。

|编辑|

我刚才尝试了其他教程。我也尝试添加[HttpPost]，但传递给URL的ID始终为0.所以我尝试显示我的userId

acc.userName = rdr["userId"].ToString();

我获得的每个ID都是0

Answer 1

请查看以下资源，希望它有所帮助，我认为您应该开始查看实体框架以进行数据访问。

您可以执行此示例中的操作

// GET: /Movies/Delete/5
public ActionResult Delete(int? id)
{
    if (id == null)
    {
        return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
    }
    Movie movie = db.Movies.Find(id);
    if (movie == null)
    {
        return HttpNotFound();
    }
    return View(movie);
}

// POST: /Movies/Delete/5
[HttpPost, ActionName("Delete")]
[ValidateAntiForgeryToken]
public ActionResult DeleteConfirmed(int id)
{
    Movie movie = db.Movies.Find(id);
    db.Movies.Remove(movie);
    db.SaveChanges();
    return RedirectToAction("Index");
}

https://docs.microsoft.com/en-us/aspnet/mvc/overview/getting-started/introduction/examining-the-details-and-delete-methods

Answer 2

第二个控制器必须具有以下请求方法：

    public ActionResult deleteAccount()
    {
        return View();
    }
    [HttpPost]
    public ActionResult deleteAccount(int id)
    {

        try
        {
            var databaseModel = new database();
            if (databaseModel.deleteAccount(id)) 
            {
                ViewBag.AlertMsg = "Employee details deleted successfully";
            }
            return RedirectToAction("GetAllEmpDetails");
        }
        catch 
        {
            return View();
        }
    }

Answer 3

默认情况下，如果我们没有明确指定获取或发布，则操作方法为获取，因此当您尝试调用一个最终混淆了哪个操作方法应该调用（带参数或没有参数），你需要指定哪个用于获取哪个用于发布像：

[HttpGet]
public ActionResult deleteAccount()
{
    return View();
}

[HttpPost]
public ActionResult deleteAccount(int id)
{

    try
    {
        var databaseModel = new database();
        if (databaseModel.deleteAccount(id)) {
            ViewBag.AlertMsg = "Employee details deleted successfully";
        }
        return RedirectToAction("GetAllEmpDetails");
    }
    catch {
        return View();
    }
}

希望它有所帮助！

Answer 4

对于相同的操作名称，您不能使用相同的HTTP谓词。换句话说，让HttpGet用于相同的动作名称，即使是过载，也是不可能的。

将一个或您的操作方法更改为其他HTTP操作动词...

[HttpGet]
public ActionResult deleteAccount()
{
    //..
}

[HttpPost]
public ActionResult deleteAccount(string country)
{
    //..
}

Answer 5

如果您使用的是WebAPI2，则可以指定路由前缀并将控制器名称设置为“删除”（不含DeleteXXX）

例如，

[RoutePrefix("api/Account")]
public class AccountController : ApiController
    {

        public IHttpActionResult Delete(Guid id)
        {
        }


        public IHttpActionResult Delete()
        {
        }    
   }

以下动作方法之间存在歧义

5 个答案: