/// <summary>
/// Add(): 입력
/// </summary>
public CategoryBase Add(CategoryBase model)
{
SqlConnection con = new SqlConnection();
con.ConnectionString = _connectionString;
con.Open();
SqlCommand cmd = new SqlCommand();
cmd.Connection = con;
cmd.CommandText = "Insert Into CategoryBases Values(@CategoryName);";
cmd.CommandType = CommandType.Text;
//[1] SqlParameter 클래스의 인스턴스 생성
SqlParameter categoryName =
new SqlParameter("@CategoryName", SqlDbType.NVarChar, 50);
//[2] Value 속성으로 값 지정
categoryName.Value = model.CategoryName;
//[3] 커멘트 개체에 매개 변수 추가
cmd.Parameters.Add(categoryName);
cmd.ExecuteNonQuery();
con.Close();
return(model);
}
/// <summary>
/// Edit(): 수정
/// </summary>
public bool Edit(CategoryBase model)
{
bool result = false;
string sql = @"
Update CategoryBases
Set CategoryName = @CategoryName
Where CategoryId = @CategoryId
";
using (SqlConnection con = new SqlConnection(_connectionString))
{
con.Open();
SqlCommand cmd = new SqlCommand(sql, con);
cmd.CommandType = CommandType.Text;
cmd.Parameters.AddWithValue("@CategoryName", model.CategoryName);
cmd.Parameters.AddWithValue("@CategoryId", model.CategoryId);
int count = cmd.ExecuteNonQuery(); // 영향받은 레코드 수 반환
if (count > 0)
{
result = true; // 업데이트 완료
}
}
return(result);
}
/// <summary>
/// Browse(): 상세
/// </summary>
public CategoryBase Browse(int id)
{
SqlConnection con = new SqlConnection();
con.ConnectionString = _connectionString;
con.Open();
SqlCommand cmd = new SqlCommand();
cmd.Connection = con;
cmd.CommandText = @"
Select CategoryId, CategoryName
From CategoryBases
Where CategoryId = @CategoryId
";
cmd.CommandType = CommandType.Text;
cmd.Parameters.AddWithValue("@CategoryId", id);
//[1] SqlDataReader 형식의 개체로 결괏값 받기
SqlDataReader dr = cmd.ExecuteReader();
//[2] Read() 메서드로 데이터 있는만큼 반복
CategoryBase category = null;
if (dr.Read())
{
var categoryId = dr.GetInt32(0);
var categoryName =
(dr["CategoryName"] == DBNull.Value) ? "" : dr.GetString(1);
// 개체 리터럴을 통해서 값 채우기
category = new CategoryBase
{
CategoryId = categoryId,
CategoryName = categoryName
};
}
//[3] Close() 메서드로 연결된 리더 개체 종료
dr.Close();
con.Close();
return(category);
}