// Method for inserting data into database
public bool Insert(ContactClass c)
{
// Create default type and set its value to false
bool isSuccess = false;
// 1. Connect to db
SqlConnection conn = new SqlConnection(myconnstrng);
try
{
// 2. Create Sql query to insert data into db
string sql = "INSERT INTO tbl_contact (FirstName, LastName, ContactNo, Address, Gender) VALUES (@FirstName, @LastName, @ContactNo, @Address, @Gender)";
// Create 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);
// Open connection
conn.Open();
int rows = cmd.ExecuteNonQuery();
// If the query runs successfuly then the value of rows will be > 0, else it will be = 0
if (rows > 0)
{
isSuccess = true;
}
else
{
isSuccess = false;
}
}
catch (Exception ex)
{
}
finally
{
conn.Close();
}
return(isSuccess);
}
// Method for updating data into database
public bool Update(ContactClass c)
{
// Create default return type and set its default value to false
bool isSuccess = false;
SqlConnection conn = new SqlConnection(myconnstrng);
try
{
// SQL to update data in our db
string sql = "UPDATE tbl_contact SET FirstName=@FirstName, LastName=@LastName, ContactNo=@ContactNo, Address=@Address, Gender=@Gender WHERE ContactID=@ContactID";
// Create SQL command
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.ContactID);
cmd.Parameters.AddWithValue("@Address", c.Address);
cmd.Parameters.AddWithValue("@Gender", c.Gender);
cmd.Parameters.AddWithValue("@ContactID", c.ContactID);
// Open DB connection
conn.Open();
int rows = cmd.ExecuteNonQuery();
// If the query runs successfuly then the value of rows will be > 0, else it will be = 0
if (rows > 0)
{
isSuccess = true;
}
else
{
isSuccess = false;
}
}
catch (Exception ex)
{
}
finally
{
conn.Close();
}
return(isSuccess);
}
// Method for deleting data from database
public bool Delete(ContactClass c)
{
// Create default return value and set its value to false
bool isSuccess = true;
// Create SQL connection
SqlConnection conn = new SqlConnection(myconnstrng);
try
{
// SQL to delete data
string sql = "DELETE FROM tbl_contact WHERE ContactID=@ContactID";
// Create SQL command
SqlCommand cmd = new SqlCommand(sql, conn);
cmd.Parameters.AddWithValue("@ContactID", c.ContactID);
// Open connection
conn.Open();
int rows = cmd.ExecuteNonQuery();
// If the query runs successfuly then the value of rows will be > 0, else it will be = 0
if (rows > 0)
{
isSuccess = true;
}
else
{
isSuccess = false;
}
}
catch (Exception ex)
{
}
finally
{
// Close connection
conn.Close();
}
return(isSuccess);
}