qr code generator c# code project ChAPTER 14 in Visual C#

Draw QR-Code in Visual C# ChAPTER 14

870 ChAPTER 14
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Creating Websites with ASP.NET MVC 2
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<StringLength(60, ErrorMessage:="Address must be 60 characters or less")> _ Public Property Address As Object <RegularExpression("((\(\d{3}\) )|(\d{3}-)) \d{3}-\d{4}", _ ErrorMessage:="Phone number should be in the format, 123-123-1234.")> _ Public Property HomePhone As Object End Class Sample of C# Code using System.ComponentModel.DataAnnotations; namespace EmployeeMgrMvc.Models { [MetadataType(typeof(EmployeeMetadata))] public partial class Employee { } public partial class EmployeeMetadata { [Required(ErrorMessage = "Employee id is required.")] public object EmployeeID { get; set; } [Required(ErrorMessage = "First name is required.")] public object FirstName { get; set; } [Required(ErrorMessage = "Last name is required.")] public object LastName { get; set; } [StringLength(60, ErrorMessage="Address must be 60 characters or less")] public object Address { get; set; } [RegularExpression(@"((\(\d{3}\) )|(\d{3}-)) \d{3}-\d{4}", ErrorMessage = "Phone number should be in the format, 123-123-1234.")] public object HomePhone { get; set; } } }
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You now have your site and your model. You can build the code and even run the application to verify.
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E xErcIsE 2 Creating the Controller and Views
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In this exercise, you add the controller and related views to the ASP.NET MVC 2 application created in the previous exercise.
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1. 2.
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Continue editing the project created in the previous exercise. Alternatively, you can open the completed Lesson 2, Exercise 1 project in the samples installed from the CD. Right-click the Controllers folder and choose Add | Controller. Set the controller name to EmployeeController. Select the check box to create the default set of action methods.
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Lesson 2: Creating Models, Views, and Controllers
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ChAPTER 14
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Open the EmployeeController. Remove the Delete methods because this practice will not implement these. Add code to each action method to work with the model based on the action. This includes the Index method (which returns a list of Employees) and the Details, Create, and Edit methods. Assume that each of these pages will be created as a strongly typed view. Be sure to add a using (Imports in Visual Basic) statement for EmployeeMgrMvc.Models. The following code shows an example.
Sample of Visual Basic Code Namespace EmployeeMgrMvc Public Class EmployeeController Inherits System.Web.Mvc.Controller Function Index() As ActionResult Dim nw As New northwndEntities() Return View(nw.Employees) End Function Function Details(ByVal id As Integer) As ActionResult Return View(GetEmployee(id)) End Function Function Create() As ActionResult Return View() End Function <HttpPost()> _ Function Create(ByVal emp As Employee) As ActionResult Try Dim nw As New northwndEntities() nw.AddToEmployees(emp) nw.SaveChanges() Return RedirectToAction("Index") Catch Return View() End Try End Function Function Edit(ByVal id As Integer) As ActionResult Return View(GetEmployee(id)) End Function <HttpPost()> _ Function Edit(ByVal emp As Employee) As ActionResult Try Dim nw As New northwndEntities() Dim origEmp As Employee = GetEmployee(emp.EmployeeID) nw.Employees.Attach(emp) nw.ApplyOriginalValues("Employees", origEmp) nw.SaveChanges() Return RedirectToAction("Index") Catch Return View() End Try End Function
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<NonAction()> _ Function GetEmployee(ByVal id As Integer) As Employee Dim nw As New northwndEntities() Dim empQuery = From e In nw.Employees Where e.EmployeeID = id Select e Dim emp As Employee = empQuery.FirstOrDefault() Return emp End Function End Class End Namespace Sample of C# Code using using using using using using System; System.Collections.Generic; System.Linq; System.Web; System.Web.Mvc; EmployeeMgrMvc.Models;
namespace EmployeeMgrMvc.Controllers { public class EmployeeController : Controller { public ActionResult Index() { northwndEntities nw = new northwndEntities(); return View(nw.Employees); } public ActionResult Details(int id) { return View(GetEmployee(id)); } public ActionResult Create() { return View(); } [HttpPost] public ActionResult Create(Employee emp) { try { northwndEntities nw = new northwndEntities(); nw.AddToEmployees(emp); nw.SaveChanges(); return RedirectToAction("Index"); }
Lesson 2: Creating Models, Views, and Controllers
ChAPTER 14
catch { return View(); } } public ActionResult Edit(int id) { return View(GetEmployee(id)); } [HttpPost] public ActionResult Edit(Employee emp) { try { northwndEntities nw = new northwndEntities(); Employee origEmp = GetEmployee(emp.EmployeeID); nw.Employees.Attach(emp); nw.ApplyOriginalValues("Employees", origEmp); nw.SaveChanges(); return RedirectToAction("Index"); } catch { return View(); } } [NonAction] private Employee GetEmployee(int id) { northwndEntities nw = new northwndEntities(); var empQuery = from e in nw.Employees where e.EmployeeID == id select e; Employee emp = empQuery.FirstOrDefault(); return emp; } } }
4. 5.
Next, add a subfolder to the Views folder and name it Employee. Right-click the Employee folder and choose Add | View. Name this view page index. Check the Strongly Typed View check box. Select EmployeeMgrMvc.Models.Employee from the View Data Class list. Select List from the View Content list. Leave the other settings as defaults, and click Add. If you want, inside the Index.aspx page, remove some of the fields from the display grid to show only pertinent information.
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