Auto increment of employee id feature added.

Author: kiranshahi

EmployeeManagementSystem.Data/Employee.cs

@@ -10,25 +10,25 @@ public Employee()
         {
         }
 
-        public Employee(string id, string fullName, string address, string contact, string email, string designation, string department, string dateOfJoin,
+        public Employee(int id, string fullName, string address, string contact, string email, string designation, string department, string dateOfJoin,
             string wageRate, string workedHour)
         {
-            this.EmployeeID = id;
-            this.FullName = fullName;
-            this.Address = address;
-            this.Contact = contact;
-            this.Email = email;
-            this.Designation = designation;
-            this.Department = department;
-            this.DateOfJoin = string.IsNullOrEmpty(dateOfJoin) ? DateTime.Now.ToShortDateString() : dateOfJoin;
-            this.WageRate = wageRate;
-            this.WorkedHour = workedHour;
+            EmployeeID = id;
+            FullName = fullName;
+            Address = address;
+            Contact = contact;
+            Email = email;
+            Designation = designation;
+            Department = department;
+            DateOfJoin = string.IsNullOrEmpty(dateOfJoin) ? DateTime.Now.ToShortDateString() : dateOfJoin;
+            WageRate = wageRate;
+            WorkedHour = workedHour;
         }
 
         [Key]
         [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
         public Guid Id { get; set; }
-        public string EmployeeID { get; set; }
+        public int EmployeeID { get; set; }
         public string FullName { get; set; }
         public string Address { get; set; }
         public string Contact { get; set; }

EmployeeManagementSystem.Data/EmployeeManagementContext.cs

@@ -13,7 +13,7 @@ public EmployeeManagementContext()
 
         protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
         {
-            optionsBuilder.UseSqlServer(@"Server=kirans;Database=EmployeeManagement;Trusted_Connection=True;TrustServerCertificate=True;");            
+            optionsBuilder.UseSqlServer(@"Server=localhost;Database=EmployeeManagement;Trusted_Connection=True;TrustServerCertificate=True;");            
         }
     }
 }

EmployeeManagementSystem/AddEmployee.Designer.cs

@@ -22,11 +22,11 @@ public partial class AddEmployee : Form
         //Delegate has been added
         public delegate void IdentityHandler(object sender, IdentityEventArgs e);
 
-        
+
         //Event of the delegate type has been added. i.e. Object of delegate created
         public event IdentityHandler IdentityUpdated;
 
-        public AddEmployee()
+        public AddEmployee(int nextEmployeID)
         {
             InitializeComponent();
             comboBoxDepartment.Items.Add("Administrative");
@@ -35,6 +35,10 @@ public AddEmployee()
             comboBoxDepartment.Items.Add("Marketing");
             comboBoxDepartment.Items.Add("IT");
             comboBoxDepartment.SelectedIndex = 0;
+            if (nextEmployeID != 0)
+            {
+                txtIdNo.Text = nextEmployeID.ToString();
+            }
         }
 
         //This method will set the values on controls received from the selected row.
@@ -82,7 +86,7 @@ private void LblClose_Click(object sender, EventArgs e)
 
         private async void BtnSave_Click(object sender, EventArgs e)
         {
-            var id = txtIdNo.Text;
+            var id = int.TryParse(txtIdNo.Text, out int EmployeeNo);
             var name = txtFullName.Text;
             var address = txtAddress.Text;
             var contactNo = txtContact.Text;
@@ -95,13 +99,13 @@ private async void BtnSave_Click(object sender, EventArgs e)
 
             using (var context = new EmployeeManagementContext())
             {
-                var emp = new Employee(id, name, address, contactNo, email, desigination, department, dateOfJoin, wageRate, hourWorked);
+                var emp = new Employee(EmployeeNo, name, address, contactNo, email, desigination, department, dateOfJoin, wageRate, hourWorked);
                 context.Employees.Add(emp);
                 await context.SaveChangesAsync();
             }
 
             //instance event args and value has been passed 
-            var args = new IdentityEventArgs(id, name, address, contactNo, email, desigination, department, dateOfJoin, wageRate, hourWorked);
+            var args = new IdentityEventArgs(EmployeeNo, name, address, contactNo, email, desigination, department, dateOfJoin, wageRate, hourWorked);
 
             //Event has be raised with update arguments of delegate
             IdentityUpdated?.Invoke(this, args);

EmployeeManagementSystem/AddEmployee.cs

@@ -1,17 +1,17 @@
 <?xml version="1.0" encoding="utf-8"?>
 <root>
-  <!-- 
+  <!--
     Microsoft ResX Schema 
-    
+
     Version 2.0
-    
-    The primary goals of this format is to allow a simple XML format 
-    that is mostly human readable. The generation and parsing of the 
-    various data types are done through the TypeConverter classes 
+
+    The primary goals of this format is to allow a simple XML format
+    that is mostly human readable. The generation and parsing of the
+    various data types are done through the TypeConverter classes
     associated with the data types.
-    
+
     Example:
-    
+
     ... ado.net/XML headers & schema ...
     <resheader name="resmimetype">text/microsoft-resx</resheader>
     <resheader name="version">2.0</resheader>
@@ -26,36 +26,36 @@
         <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
         <comment>This is a comment</comment>
     </data>
-                
-    There are any number of "resheader" rows that contain simple 
+
+    There are any number of "resheader" rows that contain simple
     name/value pairs.
-    
-    Each data row contains a name, and value. The row also contains a 
-    type or mimetype. Type corresponds to a .NET class that support 
-    text/value conversion through the TypeConverter architecture. 
-    Classes that don't support this are serialized and stored with the 
+
+    Each data row contains a name, and value. The row also contains a
+    type or mimetype. Type corresponds to a .NET class that support
+    text/value conversion through the TypeConverter architecture.
+    Classes that don't support this are serialized and stored with the
     mimetype set.
-    
-    The mimetype is used for serialized objects, and tells the 
-    ResXResourceReader how to depersist the object. This is currently not 
+
+    The mimetype is used for serialized objects, and tells the
+    ResXResourceReader how to depersist the object. This is currently not
     extensible. For a given mimetype the value must be set accordingly:
-    
-    Note - application/x-microsoft.net.object.binary.base64 is the format 
-    that the ResXResourceWriter will generate, however the reader can 
+
+    Note - application/x-microsoft.net.object.binary.base64 is the format
+    that the ResXResourceWriter will generate, however the reader can
     read any of the formats listed below.
-    
+
     mimetype: application/x-microsoft.net.object.binary.base64
-    value   : The object must be serialized with 
+    value   : The object must be serialized with
             : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
             : and then encoded with base64 encoding.
     
     mimetype: application/x-microsoft.net.object.soap.base64
-    value   : The object must be serialized with 
+    value   : The object must be serialized with
             : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
             : and then encoded with base64 encoding.
 
     mimetype: application/x-microsoft.net.object.bytearray.base64
-    value   : The object must be serialized into a byte array 
+    value   : The object must be serialized into a byte array
             : using a System.ComponentModel.TypeConverter
             : and then encoded with base64 encoding.
     -->

EmployeeManagementSystem/AddEmployee.resx

@@ -61,7 +61,7 @@ private void OnMouseUp(object sender, MouseEventArgs e)
 
         private void AddEmployee_Click(object sender, EventArgs e)
         {
-            var addEmp = new AddEmployee();
+            var addEmp = new AddEmployee(GetHighestEmployeeID() + 1);
             addEmp.IdentityUpdated += SaveRecord;
             addEmp.ShowDialog();
         }
@@ -118,7 +118,7 @@ private void BtnEdit_Click(object sender, EventArgs e)
                 var hourWorked = Convert.ToString(dataGridView.Rows[row].Cells[9].Value);
 
 
-                var addEmp = new AddEmployee();
+                var addEmp = new AddEmployee(0);
                 addEmp.LoadData(id, name, address, contact, email, desigination, department, dateOfJoin, wageRate, hourWorked);
                 addEmp.IdentityUpdated += UpdateRecord;
                 addEmp.ShowDialog();
@@ -262,7 +262,8 @@ public async void ImportEmployeeFromCsv()
             {
                 using var context = new EmployeeManagementContext();
                 dataGridView.Rows.Add(value[0], value[1], value[2], value[3], value[4], value[5], value[6], value[7], value[8], value[9]);
-                var emp = new Employee(value[0], value[1], value[2], value[3], value[4], value[5], value[6], value[7], value[8], value[9]);
+                bool isParsable = int.TryParse(value[0], out int employeeNo);
+                var emp = new Employee(isParsable ? employeeNo : 0, value[1], value[2], value[3], value[4], value[5], value[6], value[7], value[8], value[9]);
                 context.Employees.Add(emp);
                 try
                 {
@@ -310,5 +311,18 @@ public void GetEmployees()
                 }
             }
         }
+        public int GetHighestEmployeeID()
+        {
+            int highestEmployeeID = 0;
+            foreach (DataGridViewRow item in dataGridView.Rows)
+            {
+                bool isParsable = int.TryParse(Convert.ToString(item.Cells[0].Value), out int employeeID);
+                if (isParsable)
+                {
+                    highestEmployeeID = employeeID > highestEmployeeID ? employeeID : highestEmployeeID;
+                }
+            }
+            return highestEmployeeID;
+        }
     }
 }

EmployeeManagementSystem/EmployeeDetails.cs

@@ -9,22 +9,22 @@ namespace EmployeeManagementSystem
      *******/
     public class IdentityEventArgs : EventArgs
     {
-        public IdentityEventArgs(string id, string fullName, string address, string contact, string email,
+        public IdentityEventArgs(int id, string fullName, string address, string contact, string email,
             string designation, string department,string dateOfJoin, string wageRate, string workedHour)
         {
-            this.Id = id;
-            this.FullName = fullName;
-            this.Address = address;
-            this.Contact = contact;
-            this.Email = email;
-            this.Designation = designation;
-            this.Department = department;
-            this.DateOfJoin = dateOfJoin;
-            this.WageRate = wageRate;
-            this.WorkedHour = workedHour;
+            Id = id;
+            FullName = fullName;
+            Address = address;
+            Contact = contact;
+            Email = email;
+            Designation = designation;
+            Department = department;
+            DateOfJoin = dateOfJoin;
+            WageRate = wageRate;
+            WorkedHour = workedHour;
         }
 
-        public string Id { get; }
+        public int Id { get; }
         public string FullName { get; }
         public string Address { get; }
         public string Contact { get; }