//method to update 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 update in our database
string sql = "UPDATE tbl_contact SET FirstName=@FirstName, LastName=@LastName, ContactNo=@ContactNo, Address=@Address, Gender=@Gender WHERE ContactID=@ContactID";
//create sql commande
SqlCommand cmd = new SqlCommand(sql, conn);
//create parameters to add value
cmd.Parameters.AddWithValue("@FirstName", c.FirstName);
cmd.Parameters.AddWithValue("@LastName", c.LastName);
cmd.Parameters.AddWithValue("@ContactNo", c.ConstactNo);
cmd.Parameters.AddWithValue("@Address", c.Address);
cmd.Parameters.AddWithValue("@Gender", c.Gender);
cmd.Parameters.AddWithValue("ContactID", c.ContactID);
//oen database connection
conn.Open();
int rows = cmd.ExecuteNonQuery();
//if the query runs succesfuly then the value will be grearer than zero else its value will be 0
if (rows > 0)
{
isSuccess = true;
}
else
{
isSuccess = false;
}
}
catch (Exception e)
{
}
finally
{
conn.Close();
}
return(isSuccess);
}
//inserting data into database
public bool Insert(ContactClass c)
{
//creating a default type and setting its value to false
bool isSuccess = false;
//step 1 connect database
SqlConnection conn = new SqlConnection(myconnstrng);
try
{
//step 2 create a slq query to insert data
string sql = "INSERT INTO tbl_contact (FirstName, LastName, ContactNo, Address, Gender) VALUES (@FirstName, @LastName, @ContactNo, @Address, @Gender)";
//creating sql command using sql and conn
SqlCommand cmd = new SqlCommand(sql, conn);
//creating parameters to add data
cmd.Parameters.AddWithValue("@FirstName", c.FirstName);
cmd.Parameters.AddWithValue("@LastName", c.LastName);
cmd.Parameters.AddWithValue("@ContactNo", c.ConstactNo);
cmd.Parameters.AddWithValue("@Address", c.Address);
cmd.Parameters.AddWithValue("@Gender", c.Gender);
//conection open here
conn.Open();
int rows = cmd.ExecuteNonQuery();
//if the query runs succesfuly then the value of rows will be generate than zero else its value will be 0
if (rows > 0)
{
isSuccess = true;
}
else
{
isSuccess = false;
}
}
catch (Exception e)
{
}
finally
{
conn.Close();
}
return(isSuccess);
}