System.Data.Entity.Infrastructure.DbUpdateConcurrencyException HResult=0x80131501 Message=Store update, insert, or delete statement affected an unexpected number of rows (0).

Phạm Thanh Lam 0 Reputation points
2024-11-18T17:56:30.2966667+00:00

using System;

using System.Collections.Generic;

using System.Data;

using System.Data.Entity;

using System.Data.Entity.Infrastructure;

using System.IO;

using System.Linq;

using System.Net;

using System.Web;

using System.Web.Mvc;

using WebApplication1.Models;

namespace WebApplication1.Controllers

{

public class DestinationsController : Controller

{

    private DBDuLich2Entities db = new DBDuLich2Entities();

    // GET: Destinations

    [Authorize(Roles = "Admin")]

    public ActionResult Index()

    {

        var destinations = db.Destinations.Include(d => d.Map);

        return View(destinations.ToList());

    }

    // GET: Destinations/Details/5

    [Authorize(Roles = "Admin")]

    public ActionResult Details(int? id)

    {

        if (id == null)

        {

            return new HttpStatusCodeResult(HttpStatusCode.BadRequest);

        }

        Destination destination = db.Destinations.Find(id);

        if (destination == null)

        {

            return HttpNotFound();

        }

        return View(destination);

    }

    // GET: Destinations/Create

    [Authorize(Roles = "Admin")]

    public ActionResult Create()

    {

        ViewBag.destination_id = new SelectList(db.Maps, "Map_Id", "Destination_Name");

        return View();

    }

    // POST: Destinations/Create

    [HttpPost]

    [ValidateAntiForgeryToken]

    [Authorize(Roles = "Admin")]

    public ActionResult Create([Bind(Include = "destination_name,description,imageDes")] Destination destination, HttpPostedFileBase imageDes)

    {

        if (ModelState.IsValid)

        {

            // Xử lý ảnh (nếu có)

            if (imageDes != null && imageDes.ContentLength > 0)

            {

                var fileName = Path.GetFileName(imageDes.FileName);

                var path = Path.Combine(Server.MapPath("~/Content/Images"), fileName);

                imageDes.SaveAs(path);

                destination.imageDes = fileName; // Lưu tên tệp vào thuộc tính imageDes

            }

            // Thêm mới destination vào cơ sở dữ liệu

            db.Destinations.Add(destination);

            db.SaveChanges();

            // Chuyển hướng về Index sau khi lưu thành công

            return RedirectToAction("Index");

        }

        // Nếu ModelState không hợp lệ, trả lại dữ liệu về View

        ViewBag.destination_id = new SelectList(db.Maps, "Map_Id", "Destination_Name", destination.destination_id);

        return View(destination);

    }

    // GET: Destinations/Edit/5

    [Authorize(Roles = "Admin")]

    public ActionResult Edit(int? id)

    {

        if (id == null)

        {

            return new HttpStatusCodeResult(HttpStatusCode.BadRequest);

        }

        // Tìm đối tượng trong cơ sở dữ liệu theo id

        Destination destination = db.Destinations.Find(id);

        if (destination == null)

        {

            return HttpNotFound();

        }

        // Truyền thông tin của destination vào View

        ViewBag.destination_id = new SelectList(db.Maps, "Map_Id", "Destination_Name", destination.destination_id);

        return View(destination);

    }

    // POST: Destinations/Edit/5

    [HttpPost]

    [ValidateAntiForgeryToken]

    [Authorize(Roles = "Admin")]

    public ActionResult Edit([Bind(Include = "destination_id,destination_name,description,imageDes")] Destination destination)

    {

        if (ModelState.IsValid)

        {

            db.Entry(destination).State = EntityState.Modified;

            db.SaveChanges();

            return RedirectToAction("Index");

        }

        ViewBag.destination_id = new SelectList(db.Maps, "Map_Id", "Destination_Name", destination.destination_id);

        return View(destination);

    }

    // GET: Destinations/Delete/5

    [Authorize(Roles = "Admin")]

    public ActionResult Delete(int? id)

    {

        if (id == null)

        {

            return new HttpStatusCodeResult(HttpStatusCode.BadRequest);

        }

        Destination destination = db.Destinations.Find(id);

        if (destination == null)

        {

            return HttpNotFound();

        }

        return View(destination);

    }

    // POST: Destinations/Delete/5

    [HttpPost, ActionName("Delete")]

    [ValidateAntiForgeryToken]

    [Authorize(Roles = "Admin")]

    public ActionResult DeleteConfirmed(int id)

    {

        Destination destination = db.Destinations.Find(id);

        if (destination == null)

        {

            return HttpNotFound();

        }

        db.Destinations.Remove(destination);

        db.SaveChanges();

        return RedirectToAction("Index");

    }

    public ActionResult DestinationList()

    {

        var des = db.Destinations.Include(p => p.Trips);

        return View(des.ToList());

    }

    protected override void Dispose(bool disposing)

    {

        if (disposing)

        {

            db.Dispose();

        }

        base.Dispose(disposing);

    }

}
```}

System.Data.Entity.Infrastructure.DbUpdateConcurrencyException

  HResult=0x80131501

  Message=Store update, insert, or delete statement affected an unexpected number of rows (0). Entities may have been modified or deleted since entities were loaded. See [http://go.microsoft.com/fwlink/?LinkId=472540]() for information on understanding and handling optimistic concurrency exceptions.

  Source=EntityFramework

  StackTrace:

   at System.Data.Entity.Internal.InternalContext.SaveChanges()

   at WebApplication1.Controllers.DestinationsController.Edit(Destination destination) in D:\Agodaa\WebApplication1\Controllers\DestinationsController.cs:line 112

   at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters)

   at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c.<BeginInvokeSynchronousActionMethod>b__9_0(IAsyncResult asyncResult, ActionInvocation innerInvokeState)

   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`2.CallEndDelegate(IAsyncResult asyncResult)

   at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult)

   at System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvocationWithFilters.<>c__DisplayClass11_0.<InvokeActionMethodFilterAsynchronouslyRecursive>b__0()

   at System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvocationWithFilters.<>c__DisplayClass11_2.<InvokeActionMethodFilterAsynchronouslyRecursive>b__2()

  This exception was originally thrown at this call stack:

[External Code]


OptimisticConcurrencyException: Store update, insert, or delete statement affected an unexpected number of rows (0). Entities may have been modified or deleted since entities were loaded. See [http://go.microsoft.com/fwlink/?LinkId=472540]() for information on understanding and handling optimistic concurrency exceptions.

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  1. Hongrui Yu-MSFT 3,015 Reputation points Microsoft Vendor
    2024-11-19T05:51:22.5266667+00:00

    Hi,@Phạm Thanh Lam. Welcome to Microsoft Q&A. 

    According to your error message, you seem to have encountered a concurrency error when saving data into the database.

    GUID and Timestamp are concurrency tokens used to detect whether the system has concurrency errors. When a concurrency error occurs, a DbUpdateConcurrencyException exception is thrown.

    You could catch the exception and decide which value to store in the database. You could refer to the following writing.

        try
        {
            db.SaveChanges();
        }
    
        catch (DbUpdateConcurrencyException ex)
        {
            foreach (var entry in ex.Entries)
            {
                if (entry.Entity is Destination)
                {
                    var proposedValues = entry.CurrentValues;
                    var databaseValues = entry.GetDatabaseValues();
    
                    foreach (var property in proposedValues.Properties)
                    {
                        var proposedValue = proposedValues[property];
                        var databaseValue = databaseValues[property];
     
     // TODO: decide which value should be written to database 
     // proposedValues[property] = proposedValue;
                    }
    
     
                    // Refresh original values to bypass next concurrency check
                    entry.OriginalValues.SetValues(databaseValues);
                    // db.SaveChanges();
                }
                else
                {
                    throw new NotSupportedException(
                        "Don't know how to handle concurrency conflicts for "
                        + entry.Metadata.Name);
                }
            }
        }
    

    For more detailed information on how to handle concurrency conflicts when using Entity Framework Core, please refer to the official documentation.


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