I'm creating a registration app where you can enter the student name, id and gpa and it will all be stored in a collection list. The label is showing as 0 even when students are registered. Here is the relevant code. Any help is appreciated.
namespace Lab09
{
class Student
{
string name;
int id;
int intNumber;
decimal gpa;
public Student(string Name, int Id, decimal Gpa)
{
name = Name;
id = Id;
gpa = Gpa;
}
public string Name
{
set { name = value; }
get
{
return name;
}
}
public int Id
{
get
{
return id;
}
}
public decimal Gpa
{
get
{
return gpa;
}
}
public int Number
{
get
{
return intNumber;
}
}
}
}
namespace Lab09
{
public partial class Form1 : Form
{
List<Student> listofStudents;
int intCurrentStudent = 0;
public Form1()
{
InitializeComponent();
listofStudents = new List<Student>();
}
private void btnRegister_Click(object sender, EventArgs e)
{
try
{
if (Decimal.Parse(txtGPA.Text) > 0 && Decimal.Parse(txtGPA.Text) <= 4)
{
if (txtName.Text != "")
{
listofStudents.Add(new Student(txtName.Text, Int32.Parse(txtID.Text), Decimal.Parse(txtGPA.Text)));
intCurrentStudent = listofStudents.Count - 1;
txtName.Enabled = false;
txtID.Enabled = false;
txtGPA.Enabled = false;
btnRegister.Enabled = false;
if (listofStudents.Count > 1)
{
btnPrevious.Enabled = true;
}
displayNumStudents();
}
}
else
{
MessageBox.Show("You must enter a name and GPA must be above 0 and less than or equal to 4");
}
}
catch
{
MessageBox.Show("ID and GPA need to be numbers");
}
}
private void displayNumStudents()
{
int NumOfStudents = 0;
foreach (Student aStudent in listofStudents)
{
NumOfStudents += aStudent.Number;
}
lblNum.Text = NumOfStudents.ToString();
}
you have field int intNumber that your Number property is returning, but you aren't ever setting it. And then you're using that number to count your students, which doesn't make sense.
I assume you want the registered student count:
private void displayNumStudents()
{
int NumOfStudents = listOfStudents.Count();
lblNum.Text = NumOfStudents.ToString();
}
The variable intNumber;
In your student class is never assigned and only returned via the Number property in your Student class.
public int Number
{
get
{
return intNumber;
}
}
You need to update this property when a new Student is added to the collection.
You could modify your Student constructor to take in this argument and assign it there:
public Student(string Name, int Id, decimal Gpa, int studentNumber)
{
name = Name;
id = Id;
gpa = Gpa;
intNumber = studentNumber;
}
You would then have to pass this to the new Student object when you create it and then add it to the list, for example:
string name = txtName.Text;
int id = Int32.Parse(txtID.Text);
decimal gpa = decimal.Parse(txtGPA.Text);
int studentNumber = listofStudents.Count() + 1;
Student student = new Student(name, id, gpa, studentNumber);
listofStudents.Add(student);
Related
I'm trying to use the keyword value in the set accessor and as long as the user entered value is greater than 0, I want to set it to the variable Quantity.
I can not seem to find what it is I am doing wrong. I keep getting a traceback error to for this Quantity = value;. Hoping someone can see what I don't. Thanks.
using System;
namespace Invoice
{
class MainClass
{
public static void Main(string[] args)
{
Console.WriteLine("How many parts would you like to " +
"enter into the system: ");
int newParts = int.Parse(Console.ReadLine());
Invoice[] invoice = new Invoice[newParts];
for (int i = 0; i < newParts; i++)
{
invoice[i] = new Invoice();
Console.WriteLine("Enter the part number: ");
invoice[i].PartNumber = Console.ReadLine();
Console.WriteLine("Enter description of item: ");
invoice[i].PartDescription = Console.ReadLine();
Console.WriteLine("Enter the quantity: ");
invoice[i].Quantity = int.Parse(Console.ReadLine());
Console.WriteLine("Enter in the price of the item: ");
invoice[i].PricePerItem = decimal.Parse(Console.ReadLine());
}
for (int i = 0; i < newParts; i++)
{
invoice[i].DisplayOrder();
}
}
}
}
using System;
namespace Invoice
{
public class Invoice
{
public string PartNumber { get; set; }
public string PartDescription { get; set; }
public int Quantity
{
get { return Quantity; }
set
{
if (value >= 0)
{
Quantity = value;
}
if (value <= 0)
{
Quantity = Quantity;
}
}
}
public decimal PricePerItem
{
get
{
return PricePerItem;
}
set
{
if(value >= 0.0m)
{
PricePerItem = value;
}
if (value <= 0.0m)
{
PricePerItem = PricePerItem;
}
}
}
public Invoice(String PartNumber, String PartDescription, int Quantity, decimal PricePerItem)
{
this.PartNumber = PartNumber;
this.PartDescription = PartDescription;
this.Quantity = Quantity;
this.PricePerItem = PricePerItem;
}
public Invoice()
{
}
public decimal GetInvoiceAmount(int numberOfItems, decimal priceOfItem)
{
return numberOfItems * priceOfItem;
}
public void DisplayOrder()
{
decimal total = GetInvoiceAmount(Quantity, PricePerItem);
// Display Receipt
Console.Write("\nOrder Receipt: ");
Console.WriteLine($"\nPart Number: {PartNumber}");
Console.WriteLine($"Unit Price: {PricePerItem:C}");
Console.WriteLine($"Quantity: {Quantity}");
Console.WriteLine($"Part Description: {PartDescription}");
Console.WriteLine($"Total price: {total:C}");
}
}
}
This makes no sense:
if (value >= 0)
{
Quantity = value;
}
if (value <= 0)
{
Quantity = Quantity;
}
Why would you set a property to itself? That can't achieve anything useful. You say that you want to set the property if and only if the assigned value is greater than zero, so why would you be checking value for anything but being greater than zero?
if (value > 0)
{
Quantity = value;
}
That's it, that's all.
That said, you also ought to be throwing an ArgumentOutOfRangeException if the value is not valid, rather than just silently not setting the property. The logical way to do that would be like so:
if (value <= 0)
{
throw new ArgumentOutOfRangeException(...);
}
Quantity = value;
Now the property value will only be set if an exception is not thrown.
I also just realised that you have no backing field for this property, so that's wrong. The whole thing should look like this:
private int quantity;
public int Quantity
{
get { return quantity; }
set
{
if (value <= 0)
{
throw new ArgumentOutOfRangeException(...);
}
quantity = value;
}
}
The error is because in your set {} you are invoking the same setter recursively.
private int quantity;
public int Quantity
{
get { return this.quantity; }
set
{
if (value >= 0)
{
this.quantity= value;
}
}
}
private decimal pricePerItem;
public decimal PricePerItem
{
get
{
return this.pricePerItem;
}
set
{
if(value >= 0.0m)
{
this.pricePerItem= value;
}
}
}
I need to create a class Person, that has fields:
name, surname and salary.
If the salary is lower than 0, I get the exception:
ArgumentOutOfRangeException. Use getter,setter
I tried with:
public class Employee
{
public string name { get; set; }
string surname { get; set; }
private int salary;
public int Salary
{
get
{
return salary;
}
set
{
if (salary < 0)
{
throw new ArgumentOutOfRangeException("salary", "wyplata ma byc wieksza niz 0");
}
else
{
salary = value;
}
}
}
}
in main:
Employee tmp = new Employee("michal", "jakowski", -1400);
In your code, when you check if (salary < 0), the field salary is not yet updated with value. So instead you need to check whether value is less than 0.
public int Salary
{
get
{
return salary;
}
set
{
if (value < 0)
{
throw new ArgumentOutOfRangeException("salary", "wyplata ma byc wieksza niz 0");
}
else
{
salary = value;
}
}
}
I'm having difficulty trying to pass information from one form in which a user inputs a lot of employee data and presses a Submit button and the information is to display as an added row to a datagridview table. What can I do to fix this issue?
The code I have at present:
Form1:
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void getEmployeedata(Manager manager)
{
int age;
int years;
int salary;
manager.FirstName = firstnameBox.Text;
manager.LastName = lastnameBox.Text;
manager.Gender = genderBox.Text;
manager.Title = titleBox.Text;
manager.Exempt = exemptBox.Text;
if (int.TryParse(ageBox.Text, out age))
{
manager.Age = age;
if (int.TryParse(yearsBox.Text, out years))
{
manager.Years = years;
if (int.TryParse(salaryBox.Text, out salary))
{
manager.Salary = salary;
}
else
{
MessageBox.Show("Wrong salary input");
}
}
else
{
MessageBox.Show("Wrong Years input");
}
}
else
{
MessageBox.Show("Wrong age input");
}
}
private void submitButton_Click(object sender, EventArgs e)
{
Manager manager = new Manager();
getEmployeedata(manager);
EmployeeListing form2 = new EmployeeListing(manager.FirstName, manager.LastName, manager.Gender, manager.Age, manager.Years, manager.Title, manager.Exempt, manager.Salary);
form2.Show();
}
private void clearButton_Click(object sender, EventArgs e)
{
firstnameBox.Text = "";
lastnameBox.Text = "";
genderBox.Text = "";
ageBox.Text = "";
yearsBox.Text = "";
titleBox.Text = "";
exemptBox.Text = "";
salaryBox.Text = "";
}
}
class Employee
{
private string firstName = "";
private string lastName = "";
private string gender = "";
private int age = 0;
private int years = 0;
public string FirstName
{
get { return firstName; }
set { firstName = value; }
}
public string LastName
{
get { return lastName; }
set { lastName = value; }
}
public string Gender
{
get { return gender; }
set { gender = value; }
}
public int Age
{
get { return age; }
set { age = value; }
}
public int Years
{
get { return years; }
set { years = value; }
}
} //end Employee class
class Manager : Employee
{
private string title = "";
private string exempt = "";
private int salary = 0;
public string Title
{
get { return title; }
set { title = value; }
}
public string Exempt
{
get { return exempt; }
set { exempt = value; }
}
public int Salary
{
get { return salary; }
set { salary = value; }
}
} //end Manager class
Form2:
public partial class EmployeeListing : Form
{
public EmployeeListing(string firstname, string lastname, string gender, int age, int years, string title, string exempt, int salary)
{
InitializeComponent();
employeeList.Rows.Add(firstname, lastname, gender, age, years, title, exempt, salary);
}
}
In your click handler, you are initializing a EmployeeListing form every time you click the button, and you probably only want to do this once.So, keep the instance of your EmployeeListing outside of the click handler and only create one instance of it so that you can access it on subsequent clicks. To keep adding data to the form, you could create a public method on the EmployeeListing form that adds the row data and then call this method from your click handler, using the instance of the form.
This is untested, but just to get you started...
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void getEmployeedata(Manager manager)
{
int age;
int years;
int salary;
EmployeeListing form2;
manager.FirstName = firstnameBox.Text;
manager.LastName = lastnameBox.Text;
manager.Gender = genderBox.Text;
manager.Title = titleBox.Text;
manager.Exempt = exemptBox.Text;
if (int.TryParse(ageBox.Text, out age))
{
manager.Age = age;
if (int.TryParse(yearsBox.Text, out years))
{
manager.Years = years;
if (int.TryParse(salaryBox.Text, out salary))
{
manager.Salary = salary;
}
else
{
MessageBox.Show("Wrong salary input");
}
}
else
{
MessageBox.Show("Wrong Years input");
}
}
else
{
MessageBox.Show("Wrong age input");
}
}
private void submitButton_Click(object sender, EventArgs e)
{
Manager manager = new Manager();
getEmployeedata(manager);
if (form2 == null)
{
EmployeeListing form2 = new EmployeeListing();
form2.Show();
}
form2.AddRowData(manager.FirstName, manager.LastName, manager.Gender, manager.Age, manager.Years, manager.Title, manager.Exempt, manager.Salary);
}
private void clearButton_Click(object sender, EventArgs e)
{
firstnameBox.Text = "";
lastnameBox.Text = "";
genderBox.Text = "";
ageBox.Text = "";
yearsBox.Text = "";
titleBox.Text = "";
exemptBox.Text = "";
salaryBox.Text = "";
}
}
class Employee
{
private string firstName = "";
private string lastName = "";
private string gender = "";
private int age = 0;
private int years = 0;
public string FirstName
{
get { return firstName; }
set { firstName = value; }
}
public string LastName
{
get { return lastName; }
set { lastName = value; }
}
public string Gender
{
get { return gender; }
set { gender = value; }
}
public int Age
{
get { return age; }
set { age = value; }
}
public int Years
{
get { return years; }
set { years = value; }
}
} //end Employee class
class Manager : Employee
{
private string title = "";
private string exempt = "";
private int salary = 0;
public string Title
{
get { return title; }
set { title = value; }
}
public string Exempt
{
get { return exempt; }
set { exempt = value; }
}
public int Salary
{
get { return salary; }
set { salary = value; }
}
} //end Manager class
public partial class EmployeeListing : Form
{
public EmployeeListing()
{
InitializeComponent();
}
public AddRowData(string firstname, string lastname, string gender, int age, int years, string title, string exempt, int salary)
{
employeeList.Rows.Add(firstname, lastname, gender, age, years, title, exempt, salary);
}
}
You can create a DataTable on the EmployeeListing() constructor and set the DataSource:
public EmployeeListing(string firstname, string lastname, string gender, int age, int years, string title, string exempt, int salary)
{
InitializeComponent();
//employeeList.Rows.Add(firstname, lastname, gender, age, years, title, exempt, salary);
DataTable dtSource = new DataTable();
dtSource.Columns.Add("firstname", typeof(string));
dtSource.Columns.Add("lastname", typeof(string));
dtSource.Columns.Add("gender", typeof(string));
dtSource.Columns.Add("age", typeof(string));
dtSource.Columns.Add("years", typeof(string));
dtSource.Columns.Add("title", typeof(string));
dtSource.Columns.Add("exempt", typeof(string));
dtSource.Columns.Add("salary", typeof(string));
DataRow dtRow;
dtRow = dtSource.NewRow();
dtRow[0] = firstname;
dtRow[1] = lastname;
dtRow[2] = gender;
dtRow[3] = age;
dtRow[4] = years;
dtRow[5] = Title;
dtRow[6] = exempt;
dtRow[7] = salary;
dtSource.Rows.Add(dtRow.ItemArray);
employeeList.DataSource = dtSource;
}
You should also out this in another function and not in the constructor if you will add rows to the gridview more than once.
I'm trying to figure out how to populate an array with an object with multiple variables. What I need is to create an array, not a list(I'm trying to learn arrays), and populate it with 5 different bourbons. Is it possible to populate the array and store the name, age, distillery in just one index? For example,
If I called index 0, it would display:
Name: Black Maple Hill
Distillery: CVI Brands, Inc
Age: 8 years
I have this so far, in which bourbon is a derived class from whiskey and call a method in the main class to prompt user for entry.
class Bourbon : Whiskey
{
private Bourbon[] bBottles = new Bourbon[5];
public void bourbon(string name, string distillery, int age)
{
Name = name;
Distillery = distillery;
Age = age;
}
public void PopulateBottles()
{
Console.WriteLine("Please enter the information for 5 bourbons:");
for (int runs = 0; runs < 5; runs ++)
{
}
}
}
In your code you haven't defined the value variable that you are using inside the for loop. You could create new instances of the class and then store them inside the array:
public void PopulateBottles()
{
Console.WriteLine("Please enter the information for 5 bourbons:");
for (int runs = 0; runs < 5; runs ++)
{
Console.WriteLine("Name:");
var name = Console.ReadLine();
Console.WriteLine("Distillery:");
var distillery = Console.ReadLine();
Console.WriteLine("Age:");
var age = int.Parse(Console.ReadLine());
var bourbon = new Bourbon(name, distillery, age);
bBottles[runs] = bourbon;
}
}
Also make sure you have defined the Bourbon class constructor properly:
public Bourbon(string name, string distillery, int age)
{
Name = name;
Distillery = distillery;
Age = age;
}
#Jonathan. Yes, it is possible, based on my interpretation. You can try making use of indexers.
Class Bourbon : Whiskey {
public Bourbon this[int index]
{
get {
return bBottles[index];
}
set {
bBottles[index] = value;
}
}
}
Check this Need to Create Property and One Constructor to achieve your requirement.
class Bourbon
{
private Bourbon[] bBottles = new Bourbon[5];
private string name;
public string Name
{
get { return name; }
set { name = value; }
}
private string distillery;
public string Distillery
{
get { return distillery; }
set { distillery = value; }
}
private int age;
public int Age
{
get { return age; }
set { age = value; }
}
public Bourbon(string name, string distillery, int age)
{
Name = name;
Distillery = distillery;
Age = age;
}
public void PopulateBottles()
{
Console.WriteLine("Please enter the information for 5 bourbons:");
for (int runs = 0; runs < 5; runs++)
{
Console.WriteLine("Name:");
var name = Console.ReadLine();
Console.WriteLine("Distillery:");
var distillery = Console.ReadLine();
Console.WriteLine("Age:");
var age = int.Parse(Console.ReadLine());
var bourbon = new Bourbon(name, distillery, age);
bBottles[runs] = bourbon;
}
}
}
I have a parent class which is essentially a glorified list. It's extended by several subclasses for various functionalities.
public class HierarchialItemList<ItemType> : IEnumerable<ItemType>
{
public ItemType this[String itemCode]
{
get
{
foreach (IHierarchialItem curItem in hierarchialItems)
{
if (curItem.Code.Equals(itemCode, StringComparison.CurrentCultureIgnoreCase))
{
return ((ItemType)curItem);
}
}
return (default(ItemType));
}
}
public ItemType this[Int32 index]
{
get
{
return (hierarchialItems[index]);
}
}
}
public class DatabaseList : HierarchialItemList<Database>
{
public DatabaseList this[CommonDatabaseType typeToFilter]
{
get
{
DatabaseList returnList = new DatabaseList();
foreach(Database curDatabase in this)
{
if (curDatabase.DatabaseType.Equals(typeToFilter))
{
returnList.Add(curDatabase);
}
}
return (returnList);
}
}
public DatabaseList this[Environments.RMSEnvironment environmentToFilter]
{
get
{
DatabaseList returnList = new DatabaseList();
foreach(Database curDatabase in this)
{
if (curDatabase.ParentEnvironment.Equals(environmentToFilter))
{
returnList.Add(curDatabase);
}
}
return (returnList);
}
}
}
The problem is that C# thinks that this:
Database testDatabase = sampleDatabaseList[0];
Is an error and that the indexer should be returning a DatabaseList, not a Database. You and I both know that's false. Any workarounds or do all indexers have to have the same return type?
Edit: I just figured out that it's because of using an enumeration as an indexer which is internally an integer. Still, any way to use both an enumeration and an integer?
Edit 2: As requested, here is some compiliable test code which demonstrates the problem.
using System;
using System.Collections.Generic;
namespace CSQT
{
class A<T>
{
List<T> temp;
public A()
{
temp = new List<T>();
}
public void AddItem(T itemToAdd)
{
temp.Add(itemToAdd);
}
public T this[String code]
{
get { return (temp[0]); }
}
public T this[Int32 index]
{
get { return (temp[index]); }
}
}
class B : A<String>
{
public B()
: base()
{
}
public B this[BTypes testType]
{
get
{
return (this);
}
}
}
enum BTypes { TEMP1, TEMP2 };
class C
{
public C()
{
B temp = new B();
//Compile error: Cannot implicitly convert type 'CSQT.B' to 'string'
String temp2 = temp[0];
//Compile error: Cannot convert type 'CSQT.B' to 'string'
String temp3 = (String)temp[0];
//This compiles and runs but instead of going to A.this[int32], it goes to B.this[BTypes testType]
B temp4 = temp[0];
}
}
}
Why do we know that to be false? The line
Database testDatabase = sampleDatabaseList[0];
invokes the indexer with the parameter 0 which is a int literal and therefore, seeing that DatabaseList inherits from HierarchialItemList<Database> will invoke the indexer defined by
public ItemType this[Int32 itemCode] { get; }
which is declared to return an ItemType. You haven't told us what ItemType is. We have no reason to know that an ItemType can be assigned to a variable of type Database.
Indexers do not have to return the same type. However, it is not possible to overload solely on the basis of return type. That is, this is legal
class IndexerTest {
public int this[int index] {
get {
return 0;
}
}
public string this[double index] {
get {
return "Hello, success!";
}
}
}
This is not
class IndexerTest {
public int this[int index] {
get {
return 0;
}
}
public string this[int index] {
get {
return "Hello, fail!";
}
}
}
Responding to your edit:
Edit: I just figured out that it's because of using an enumeration as an indexer which is internally an integer. Still, any way to use both an enumeration and an integer?
If you want to invoke the indexer that accepts an enum, invoke it like so:
sampleDatabaseList[Environments.RMSEnvironment.SomeEnumValue];
This is perfectly valid code.
class SomeClass { }
public class A<T> : IEnumerable<T>
{
public T this[int index]
{
get
{
return (this[index]);
}
}
public T this[String index]
{
get
{
return (this[index]);
}
}
}
public class B : A<SomeClass>
{
public B this[char typeToFilter]
{
get
{
return new B();
}
}
}
B classList = new B();
SomeClass test = classList[0];
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace TestNameSpace
{
public class Employee : Person
{
string id;
public string Id
{
get { return id; }
set { id = value; }
}
decimal salary;
public decimal Salary
{
get { return salary; }
set { salary = value; }
}
string password;
public string Password
{
set { password = value; }
}
int ichk = 1, schk = 1, pchk = 1;
public Employee()
: base()
{
Id = null;
Salary = Convert.ToDecimal("0.0");
Password = null;
}
public Employee(string n, char g, DateTime d, string empid, decimal sal, string pwd)
: base(n, g, d)
{
Id = empid;
Salary = sal;
Password = pwd;
}
public override void Accept()
{
base.Accept();
try
{
Console.Write("Enter the EMPID:");
Id = Console.ReadLine();
if (string.IsNullOrEmpty(Id) == true)
{
ichk = 0;
Console.WriteLine("No ID entered!");
}
string salcheck;
Console.Write("Enter the Salary:");
salcheck = Console.ReadLine();
if (string.IsNullOrEmpty(salcheck) == true)
{
schk = 0;
Console.WriteLine("Invalid Salary");
}
else
{
Salary = Convert.ToDecimal(salcheck);
if (Salary < 0)
{
schk = 0;
Console.WriteLine("Invalid Salary");
}
}
Console.Write("Enter Password:");
Password = Console.ReadLine();
if (string.IsNullOrEmpty(password) == true)
{
pchk = 0;
Console.WriteLine("Empty Password!");
}
else
{
string pwd;
int pchk = 0;
do
{
Console.Write("Re-Enter Password:");
pwd = Console.ReadLine();
if (string.IsNullOrEmpty(pwd) == true || pwd != password)
Console.WriteLine("Passwords don't match!");
else
pchk = 1;
} while (pchk == 0);
}
}
catch (Exception e)
{
Console.Write(e.Message);
}
}
public override void Print()
{
base.Print();
if (ichk == 1)
{
Console.WriteLine("EMPID:{0}", Id);
}
else
Console.WriteLine("No Id!");
if (schk == 1)
{
Console.WriteLine("Salary:{0}", Salary);
}
else
Console.WriteLine("Invalid Salary!");
}
}
}
------------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace TestNameSpace
{
public class Person
{
protected string name;
public string Name
{
get { return name; }
set { name = value; }
}
protected char gender;
public char Gender
{
get { return gender; }
set { gender = value; }
}
protected DateTime? dob;
public DateTime? Dob
{
get { return dob; }
set { dob = value; }
}
protected int age;
public int Age
{
get { return age; }
}
public Person()
{
Name = "Default";
Gender = 'M';
Dob = null;
age = 0;
}
public Person(string n, char g, DateTime d)
{
Name = n;
Gender = g;
Dob = d;
age = DateTime.Now.Year - Dob.Value.Year;
}
int nchk = 1, gchk = 0, dchk = 0;
string datetimecheck, gendercheck;
public virtual void Accept()
{
try
{
Console.Write("Enter the name:");
Name = Console.ReadLine();
if (string.IsNullOrEmpty(Name)==true)
{
nchk = 0;
Console.WriteLine("No name entered!");
}
Console.Write("Enter the Date of birth:");
datetimecheck = Console.ReadLine();
if (string.IsNullOrEmpty(datetimecheck) == true)
{
dchk = 0;
Console.WriteLine("No date entered!");
}
else
{
Dob = Convert.ToDateTime(datetimecheck);
age = DateTime.Now.Year - Dob.Value.Year;
dchk = 1;
}
Console.Write("Enter Gender:");
gendercheck = Console.ReadLine();
if (gendercheck != "m" && gendercheck != "M" && gendercheck != "f" && gendercheck != "F")
{
gchk = 0;
Console.WriteLine("Invalid Gender");
}
else
{
gchk = 1;
Gender = Convert.ToChar(gendercheck);
}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
public virtual void Print()
{
Console.WriteLine("\n\nThe Employee Details are:\n");
if (nchk == 1)
{
Console.WriteLine("Name:{0}", Name);
}
else
Console.WriteLine("No Name!");
if (gchk == 1)
{
Console.WriteLine("Gender:{0}", Gender);
}
else
Console.WriteLine("No Gender!");
if (dchk == 1)
{
Console.WriteLine("Date Of Birth:{0}", Dob);
Console.WriteLine("Age:{0}", Age);
}
else
Console.WriteLine("No Date Of Birth!");
}
}
}
After adding the necessary classes and attributes to get your code sample to compile, I was able to run this statement with no issues:
Database testDatabase = sampleDatabaseList[0];
If you're getting an error that sampleDatabaseList[0] returns a DatabaseList, please provide a compilable code sample that contains the statement DatabaseList testDatabase = sampleDatabaseList[0];
---TRIGGER--
CREATE TRIGGER TriggerTest
ON EMP
AFTER INSERT, UPDATE, DELETE
AS
BEGIN
declare #day varchar(10)
select #day=datename(dw,getdate())
declare #hour int
Select #hour=convert(varchar(2),getdate(),114)
if ( #hour < 9 OR #hour > 13 OR #day = 'Saturday' OR #day = 'Sunday')
BEGIN
if UPDATE(EMPID)
RAISERROR ('Error!',1,16)
rollback tran
END
END
Insert into EMP values(1003,'A','A')
drop trigger TriggerTest
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace TestNameSpace
{
public class Employee:Person
{
string id;
public string Id
{
get { return id; }
set { id = value; }
}
decimal salary;
public decimal Salary
{
get { return salary; }
set { salary = value; }
}
string password;
public string Password
{
set { password = value; }
}
int ichk = 1, schk = 1, pchk = 1;
public Employee()
: base()
{
Id = null;
Salary = Convert.ToDecimal("0.0");
Password = null;
}
public Employee(string n, char g, DateTime d, string empid, decimal sal, string pwd)
: base(n, g, d)
{
Id = empid;
Salary = sal;
Password = pwd;
}
public override void Accept()
{
base.Accept();
try
{
Console.Write("Enter the EMPID:");
Id = Console.ReadLine();
if (Id == null)
{
ichk = 0;
Console.WriteLine("No ID entered!");
}
Console.Write("Enter the Salary:");
Salary = Convert.ToDecimal(Console.ReadLine());
if (Salary < 0)
{
schk = 0;
Console.WriteLine("Invalid Salary");
}
Console.Write("Enter Password:");
Password = Convert.ToString(Console.ReadLine());
if (password == null)
{
pchk = 0;
Console.WriteLine("Empty Password!");
}
}
catch (Exception e)
{
Console.Write(e.Message);
}
}
public override void Print()
{
base.Print();
if (ichk == 1)
{
Console.WriteLine("EMPID:{0}", Id);
}
else
Console.WriteLine("No Id!");
if (schk == 1)
{
Console.WriteLine("Salary:{0}", Salary);
}
else
Console.WriteLine("Invalid Salary!");
}
}
}
-----PERSON-----
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace TestNameSpace
{
public class Person
{
protected string name;
public string Name
{
get { return name; }
set { name = value; }
}
protected char gender;
public char Gender
{
get { return gender; }
set { gender = value; }
}
protected DateTime dob;
public DateTime Dob
{
get { return dob; }
set { dob = value; }
}
protected int age;
public int Age
{
get { return age; }
}
public Person()
{
Name = "Default";
Gender = 'M';
Dob = Convert.ToDateTime("09 / 12 / 1990");
age = 0;
}
public Person(string n, char g, DateTime d)
{
Name = n;
Gender = g;
Dob = d;
age = DateTime.Now.Year - Dob.Year;
}
int nchk = 1, gchk = 1, dchk = 1;
public virtual void Accept()
{
try
{
Console.Write("Enter the name:");
Name = Console.ReadLine();
if(Name == null)
{
nchk = 0;
Console.WriteLine("No name entered!");
}
Console.Write("Enter the Date of birth:");
Dob = Convert.ToDateTime(Console.ReadLine());
if (Dob == null)
{
dchk = 0;
Console.WriteLine("No date entered!");
}
else
{
age = DateTime.Now.Year - Dob.Year;
}
Console.Write("Enter Gender:");
Gender = Convert.ToChar(Console.ReadLine());
if (Gender != 'm' && Gender != 'M' && Gender != 'F' && Gender != 'f')
{
gchk = 0;
Console.WriteLine("Invalid Gender");
}
}
catch (Exception e)
{
Console.Write(e.Message);
}
}
public virtual void Print()
{
Console.WriteLine("\n\nThe Employee Details are:\n");
if (nchk == 1)
{
Console.WriteLine("Name:{0}", Name);
}
else
Console.WriteLine("No Name!");
if (gchk == 1)
{
Console.WriteLine("Gender:{0}", Gender);
}
else
Console.WriteLine("No Gender!");
if (dchk == 1)
{
Console.WriteLine("Date Of Birth:{0}", Dob);
Console.WriteLine("Age:{0}", Age);
}
else
Console.WriteLine("No Date Of Birth!");
}
}
}