CRUD Entity Framework C#

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Ejemplo Entity Framework CRUD

1. using System.Linq;  
2. using System.Web.Mvc;  
3. using ExampleCodeFirstApproch.Models;   
4. namespace ExampleCFA.Controllers  
5. {  
6.     public class StudentController : Controller  
7.     {  
8.        SchoolContext objContext;  
9.        public StudentController()  
10.         {  
11.             objContext = new SchoolContext();  
12.         }   
13.         #region List and Details Students   
14.         public ActionResult Index()  
15.         {  
16.             var studs = objContext.Students.ToList();  
17.             return View(studs);  
18.         }   
19.         public ViewResult Details(int id)  
20.         {  
21.             Student stud = objContext.Students.Where(x=>x.StudentId==id).SingleOrDefault();  
22.             return View(stud);  
23.         }   
24.         #endregion   
25.         #region Create Student   
26.         public ActionResult Create()  
27.         {  
28.             return View(new Student());  
29.         }   
30.         [HttpPost]  
31.         public ActionResult Create(Student stud)  
32.         {  
33.             objContext.Students.Add(stud);  
34.             objContext.SaveChanges();  
35.             return RedirectToAction("Index");  
36.         }   
37.         #endregion   
38.         #region Edit Student
39.         public ActionResult Edit(int id)  
40.         {  
41.             Student stud = objContext.Students.Where(x => x.StudentId == id).SingleOrDefault();  
42.             return View(stud);  
43.         }    
44.         [HttpPost]  
45.         public ActionResult Edit(Student model)  
46.         {  
47.             Student stud = objContext.Students.Where(x => x.StudentId == model.StudentId).SingleOrDefault();  
48.             if (stud != null)  
49.             {  
50.                 objContext.Entry(stud).CurrentValues.SetValues(model);  
51.                 objContext.SaveChanges();  
52.                 return RedirectToAction("Index");  
53.             }                
54.             return View(stud);  
55.         }   
56.        #endregion   
57.         #region Delete Student   
58.         public ActionResult Delete(int id)  
59.         {  
60.             Student stud = objContext.Students.Find(id);  
61.             return View(book);  
62.         }   
63.         [HttpPost]  
64.         public ActionResult Delete(int id, Student model)  
65.         {  
66.            var stud = objContext.Students.Where(x => x.StudentId == id).SingleOrDefault();  
67.            if (stud != null)  
68.             {  
69.                 objContext.Students.Remove(stud);  
70.                 objContext.SaveChanges();  
71.             }  
72.             return RedirectToAction("Index");  
73.         }  
74.         #endregion  
75.     }  
76. } 

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C# Trace a través de Event Viewer EventLog

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  using (EventLog eventLog = new EventLog("Application"))

            {

                eventLog.Source = "Application";

                eventLog.WriteEntry("Log message example", EventLogEntryType.Information, 101, 1);

            }

https://carldesouza.com/write-windows-event-viewer-c/

WRITE TO WINDOWS EVENT VIEWER FROM C#

October 18, 2017 1 Comment

First, create a new console app:

Next, add:

using System.Diagnostics;

Notice the Event Viewer in Windows has several areas:

• Windows Logs, which are:
  • Application
  • Security
  • Setup
  • System
  • Forwarded Events

And within each log, there are:

• Keywords
• Date and Time
• Source
• Event Id
• Task Category

To write to the application log, use the code:

        static void Main(string[] args)
        {
            string Event = "Application has started";

            using (EventLog eventLog = new EventLog("Application"))
            {
                eventLog.Source = "Application";
                eventLog.WriteEntry(Event, EventLogEntryType.Information);
            }
        }

This will write to the Application log. Note the event id is not found for the new application:

In order to create a new log in the event viewer, use the code below:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Diagnostics;
 
namespace Carl.EventViewerTest
{
    class Program
    {
        static void Main(string[] args)
        {
            string Event = "Application has started";
            string Source = "My App";
            string Log = "App";
 
            if (!EventLog.SourceExists(Source))
                EventLog.CreateEventSource(Source, Log);
 
            using (EventLog eventLog = new EventLog("App"))
            {
                eventLog.Source = "My App";
                eventLog.WriteEntry(Event, EventLogEntryType.Information);
            }
        }
    }
}

Notice there is a new log, “App” created under Applications and Service Logs:

 

THANKS FOR READING. BEFORE YOU LEAVE, I NEED YOUR HELP.