创建学生详细信息：- 逐步指南
创建 MVC4 Web 应用程序
选择“新建项目”
选择“Web 应用程序”，MVC 4，如下图所示
选择“基本应用程序”
点击“确定”按钮后，项目将创建完成。
首先，为应用程序创建一个空的控制器，如下所示：
步骤 1：- 现在需要在 App 文件夹中添加 XML 数据文件，如下图所示：
选择 XML 文件，然后按如下方式添加该文件，
我使用 ASP.NET MVC 4 构建了一个简单的计费应用程序，该应用程序对 XML 文件执行 CRUD 操作。通过 LINQ，我能够快速编写代码来更新 XML 文件中的节点。
仅选择 XML 文件。
创建注册表单所需的属性，如下所示：
我的应用程序如何工作
我的 ASP.NET MVC 4 计费应用程序使用 存储库模式 来访问数据。此模式的优点是它使我的方法更易于维护，并限制了数据访问层中的重复代码量。对于每个 CRUD 操作，我的存储库中都有一个相应的方法。
现在需要为模型值添加模型类，如下所示：
并按如下方式选择：
此代码用于 StudentRepository 获取数据
所有繁重的工作都由我的 StudentRepository.cs 类完成。
private List<StudentsModel> allStudents;
private XDocument StudentsData;
public StudentRepository()
{
try
{
allStudents = new List<StudentsModel>();
StudentsData = XDocument.Load(HttpContext.Current.Server.MapPath("~/App_Data/StudentData.xml"));
var Students = from t in StudentsData.Descendants("item")
select new StudentsModel(
(int)t.Element("id"),
t.Element("first_name").Value,
t.Element("last_name").Value,
t.Element("email_id").Value,
t.Element("password").Value,
t.Element("upload_img").Value,
(DateTime)t.Element("dob"),
t.Element("gender").Value,
t.Element("cell_number").Value,
t.Element("college").Value,
t.Element("adress").Value,
t.Element("city").Value,
t.Element("state").Value,
t.Element("pin").Value);
allStudents.AddRange(Students.ToList<StudentsModel>());
}
catch (Exception)
{
throw new NotImplementedException();
}
}
public IEnumerable<StudentsModel> GetStudents()
{
return allStudents;
}
public StudentsModel GetStudentByEmailPwd(string email, string pwd)
{
return allStudents.Find(t => t.Email_id == email && t.Password == pwd);
}
public StudentsModel GetStudentByID(int id)
{
return allStudents.Find(item => item.ID == id);
}
public void InsertStudentsModel(StudentsModel Student)
{
Student.ID = (int)(from S in StudentsData.Descendants("item") orderby (int)S.Element("id") descending select (int)S.Element("id")).FirstOrDefault() + 1;
StudentsData.Root.Add(new XElement("item", new XElement("id", Student.ID),
new XElement("first_name", Student.First_Name),
new XElement("last_name", Student.Last_Name),
new XElement("email_id", Student.Email_id),
new XElement("password", Student.Password),
new XElement("upload_img", Student.Upload_img),
new XElement("dob", Student.Dob.Date.ToShortDateString()),
new XElement("gender", Student.Gender),
new XElement("cell_number", Student.Cell_number),
new XElement("college", Student.College),
new XElement("adress", Student.Adress),
new XElement("city", Student.City),
new XElement("state", Student.State),
new XElement("pin", Student.Pin)));
StudentsData.Save(HttpContext.Current.Server.MapPath("~/App_Data/StudentData.xml"));
}
public void EditStudentsModel(StudentsModel Student)
{
try
{
XElement node = StudentsData.Root.Elements("item").Where(i => (int)i.Element("id") == Student.ID).FirstOrDefault();
node.SetElementValue("first_name", Student.First_Name);
node.SetElementValue("last_name", Student.Last_Name);
//node.SetElementValue("email_id", Student.Email_id);
//node.SetElementValue("password", Student.Password);
//node.SetElementValue("upload_img", Student.Upload_img);
node.SetElementValue("dob", Student.Dob.ToShortDateString());
node.SetElementValue("gender", Student.Gender);
node.SetElementValue("cell_number", Student.Cell_number);
node.SetElementValue("college", Student.College);
node.SetElementValue("adress", Student.Adress);
node.SetElementValue("city", Student.City);
node.SetElementValue("state", Student.State);
node.SetElementValue("pin", Student.Pin);
StudentsData.Save(HttpContext.Current.Server.MapPath("~/App_Data/StudentData.xml"));
}
catch (Exception)
{
throw new NotImplementedException();
}
}
public void DeleteStudentsModel(int id)
{
try
{
StudentsData.Root.Elements("item").Where(i => (int)i.Element("id") == id).Remove();
StudentsData.Save(HttpContext.Current.Server.MapPath("~/App_Data/StudentData.xml"));
}
catch (Exception)
{
throw new NotImplementedException();
}
}
现在，在模型中添加接口类以实现方法，如下所示：
public interface IStudentRepository
我的模型文件夹还包含我的接口 IStudentRepository.cs。
IEnumerable<StudentsModel> GetStudents();
List<string> Getemail();
StudentsModel GetStudentByID(int id);
StudentsModel GetStudentByEmailPwd(string email, string pwd);
void InsertStudentsModel(StudentsModel Student);
void DeleteStudentsModel(int id);
void EditStudentsModel(StudentsModel Student);
StudentModel 属性类
在我的 StudentModel.cs 类中，我使用了 System.ComponentModel.DataAnnotations 命名空间为我的模型属性添加验证。
public StudentsModel()
{
this.ID = 0;
this.First_Name = null;
this.Last_Name = null;
this.Email_id = null;
this.Password = null;
this.Upload_img = null;
this.Dob = DateTime.Now;
this.Gender = null;
this.Cell_number = null;
this.College = null;
this.Adress = null;
this.City = null;
this.State = null;
this.Pin = null;
}
public StudentsModel(int id, string first_Name, string last_Name, string email_id,string password, string upload_img, DateTime dob, string gender, string cell_number, String college,string adress, string city, string state, string pin)
{
this.ID = id;
this.First_Name = first_Name;
this.Last_Name = last_Name;
this.Email_id = email_id;
this.Password = password;
this.Upload_img = upload_img;
this.Dob = dob;
this.Gender = gender;
this.Cell_number = cell_number;
this.College = college;
this.Adress = adress;
this.City = city;
this.State = state;
this.Pin = pin;
}
public StudentsModel(string email_id, string pwd)
{
this.Email_id = email_id;
this.Password = pwd;
}
public int ID { get; set; }
[Required(ErrorMessage = "First name is required")]
public string First_Name { get; set; }
[Required(ErrorMessage = "First name is required")]
public string Last_Name { get; set; }
[Required(ErrorMessage = "Email name is required")]
[DataType(DataType.EmailAddress)]
public string Email_id { get; set; }
[Required(ErrorMessage = "Password is required")]
public string Password { get; set; }
[Required(ErrorMessage = "Profile pic is required")]
[DataType(DataType.Upload)]
public string Upload_img { get; set; }
[Required(ErrorMessage = "Date of birth is required")]
[DisplayFormat(DataFormatString = "{0:d MMM yyyy}")]
public DateTime Dob { get; set; }
[Required(ErrorMessage = "Plaese select required")]
public string Gender { get; set; }
[Required(ErrorMessage = "CellNo is required")]
[DataType(DataType.PhoneNumber)]
public string Cell_number { get; set; }
[Required(ErrorMessage = "College name is required")]
public string College { get; set; }
[Required(ErrorMessage = "Student adress is required")]
public string Adress { get; set; }
[Required(ErrorMessage = "Your city is required")]
public string City { get; set; }
[Required(ErrorMessage = "Your sate is required")]
public string State { get; set; }
[Required(ErrorMessage = "Postal code is required")]
[DataType(DataType.PostalCode)]
public string Pin { get; set; }
控制器 (Controller)
我有一个名为 HomeController.cs 的控制器，它与我的存储库交互，并包含用于执行 CRUD 操作的 get 和 post 请求。通过使用 ModelState.AddModelError() 方法，我能够在任何失败的 CRUD 操作中以红色字体显示异常错误消息。
现在是时候创建注册、更新、删除、登录首页、登出表单了，
1.如何创建注册表单
在您的控制器中添加 `CreateRegistration` 控制器方法，并附带如下图所示的上传图片代码。
#region Creating student registration
/// <summary>
/// CreatStudentRegistartion
/// </summary>
/// <returns></returns>
[HttpGet]
public ActionResult CreatStudentRegistartion()
{
return View();
}
[HttpPost]
public ActionResult CreatStudentRegistartion(StudentsModel students, HttpPostedFileBase file)
{
try
{
string ImageName = ""; if (file != null)
{
ImageName = Path.GetFileName(file.FileName);
var physicalPath = Path.Combine(Server.MapPath("~/StudentImg"), students.Email_id + ImageName);
students.Upload_img = students.Email_id + ImageName;
_StudentsRepository.InsertStudentsModel(students);
file.SaveAs(physicalPath);
}
TempData["mySesstion0"] = students.Email_id; TempData["mySesstion1"] = students.Password;
return RedirectToAction("../Home/Index");
}
catch (Exception)
{
throw new NotImplementedException();
}
}
#endregion
为控制器添加强类型视图，遵循以下步骤：
next
按如下方式选择：创建、编辑、删除，与下面相同
2.如何更新注册
在您的控制器中添加 `UpdateRegistration` 控制器方法，并附带如下图所示的不含上传图片的代码。
#region Update student registration
/// <summary>
/// CreatStudentRegistartion
/// </summary>
/// <returns></returns>
[HttpGet]
public ActionResult UpdateStudentRegistartion(int studentID)
{
try
{
return View(_StudentsRepository.GetStudents().Where(s => s.ID == studentID).ToList());
}
catch (Exception)
{
throw;
}
}
[HttpPost]
public ActionResult UpdateStudentRegistartion(StudentsModel students, HttpPostedFileBase file)
{
try
{
_StudentsRepository.EditStudentsModel(students);
TempData["Sucss"] = "You are record update successfully..";
TempData["mySesstion0"] = students.Email_id; TempData["mySesstion1"] = students.Password;
return RedirectToAction("../Home/Index");
}
catch (Exception)
{
throw new NotImplementedException();
}
}
#endregion
3.如何删除注册
在您的控制器中添加 `DeleteRegistration` 控制器方法，并附带如下图所示的代码。
#region Delete Selected Student Records
/// <summary>
/// Delete
/// </summary>
/// <param name="id"></param>
/// <returns></returns>
public ActionResult Delete(int id)
{
StudentsModel AllStudents = _StudentsRepository.GetStudentByID(id);
if (AllStudents == null)
return RedirectToAction("Index");
return View(AllStudents);
}
[HttpPost]
public ActionResult Delete(int id, FormCollection collection)
{
try
{
_StudentsRepository.DeleteStudentsModel(id);
return RedirectToAction("Index");
}
catch (Exception ex)
{
throw;
}
}
#endregion
4.如何创建登录页并通过匹配的电子邮件和密码获取学生信息
此处使用 sessions 和 temp data 来存储登录用户的数据到 session 中。
#region Login success are fails
/// <summary>
/// index
/// </summary>
/// <param name="Email_id"></param>
/// <param name="Password"></param>
/// <returns></returns>
public ActionResult Index(string Email_id, string Password)
{
try
{
List<StudentsModel> AllStudents = new List<StudentsModel>();
if (TempData["mySesstion0"] != null)
{
Email_id = TempData["mySesstion0"].ToString(); Password = TempData["mySesstion1"].ToString();
}
if (Email_id != null && Password != null)
{
AllStudents = _StudentsRepository.GetStudents().Where(s => s.Email_id == Email_id && s.Password == Password).ToList();
if (AllStudents.Count != 0)
{
Session["UserData"] = AllStudents;
TempData["Email"] = AllStudents[0].Email_id;
TempData["Pwd"] = AllStudents[0].Password;
TempData["MyID"] = AllStudents[0].ID;
return View(AllStudents);
}
else
{
TempData["ErrorLogin"] = "username or password you entered is incorrect...";
return View("../Home/LoginPage");
}
}
else
{
return View("../Home/LoginPage");
}
}
catch (Exception)
{
throw new NotImplementedException();
}
}
#endregion
5.登出
这可用于移除 session 中存储的数据。
#region session Log off controlle
/// <summary>
/// log - off session
/// </summary>
/// <returns></returns>
public ActionResult Signout()
{
Session.Clear();
Session.Abandon();
return RedirectToAction("Index");
}
#endregion
输出屏幕
1.登录屏幕
2.注册屏幕（带模型验证）
3.注册成功后
4.更新屏幕
