//Inserting Data into Database public bool Insert(contactClass c) { //Creating a default return type and setting its value to false bool isSuccess = false; //Step 1: Connect Database SqlConnection conn = new SqlConnection(myconnstrng); try { //Step 2: Create a SQL Qury to insert Data string sql = "INSERT INTO tbl_contact (FirstName, LastName, ContactNo, Address, Gender) VALUES (@FirstName, @LastName, @ContactNo, @Address, @Gender)"; //Creating cmd using sql and conn SqlCommand cmd = new SqlCommand(sql, conn); //Create Parameters to add data cmd.Parameters.AddWithValue("@FirstName", c.FirstName); cmd.Parameters.AddWithValue("@LastName", c.LastName); cmd.Parameters.AddWithValue("@ContactNo", c.ContactNo); cmd.Parameters.AddWithValue("@Address", c.Address); cmd.Parameters.AddWithValue("@Gender", c.Gender); //Connection Open Here conn.Open(); int rows = cmd.ExecuteNonQuery(); //If the Query runs successfully then the value of rows will //be greater than zero else its value will be 0 if (rows > 0) { isSuccess = true; } else { isSuccess = false; } } catch (Exception ex) { } finally { conn.Close(); } return(isSuccess); }
//Method to update fata in database from our application public bool Update(contactClass c) { //Create a default return type and set its default value to false bool isSuccess = false; SqlConnection conn = new SqlConnection(myconnstrng); try { //SQL to upate data in our Database string sql = "UPDATE tbl_contact SET FirstName=@FirstName, LastName=@LastName, ContactNo=@ContactNo, Address=@Address, Gender=@Gender"; //Creating SQL Command SqlCommand cmd = new SqlCommand(sql, conn); //Creating Parameters to add value cmd.Parameters.AddWithValue("@FirstName", c.FirstName); cmd.Parameters.AddWithValue("@LastName", c.LastName); cmd.Parameters.AddWithValue("@ContactNo", c.ContactNo); cmd.Parameters.AddWithValue("@Address", c.Address); cmd.Parameters.AddWithValue("@Gender", c.Gender); cmd.Parameters.AddWithValue("@ContactID", c.ContactID); //Open Database Connection conn.Open(); int rows = cmd.ExecuteNonQuery(); if (rows > 0) { isSuccess = true; } else { isSuccess = false; } } catch (Exception ex) { } finally { conn.Close(); } return(isSuccess); }
//Metod to Delete Data from Database public bool Delete(contactClass c) { //Create a default return value and set its value to false bool isSuccess = false; //Create SQL Connection SqlConnection conn = new SqlConnection(myconnstrng); try { //SQL to Delete Data string sql = "DELETE FROM tbl_contact WHERE ContactID=@ContactID"; //Creating SQL Command SqlCommand cmd = new SqlCommand(sql, conn); cmd.Parameters.AddWithValue("@ContactID", c.ContactID); //Open Connexction conn.Open(); int rows = cmd.ExecuteNonQuery(); //If the query run sucessfully then the value of is greter than zero else its value is 0 if (rows > 0) { isSuccess = true; } else { isSuccess = false; } } catch (Exception ex) { } finally { conn.Close(); } return(isSuccess); }