DevExpress.XtraGrid的使用(部分)

(三)

       XtraGrid的功能与GridView的功能相似,使用方法也类似,不过他的功能更加令人惊讶,看看下面的效果

//生成此效果的解决方案:
// 1.从数据库去出两张表,
//后台
    SqlConnManager.cs
    public Class SqlConnManager
   {
        string _strConn = string.Empty;
        SqlConnection _conn ;
        public SqlConnManager(string strConn)
        {
            _strConn = strConn;
            if (_conn == null)
                _conn = GetSqlConn;
        }
public System.Data.SqlClient.SqlConnection GetSqlConn
        {
            get
            {
                if (_conn == null||_conn.ConnectionString.Length==0)
                    _conn = new SqlConnection(strConn);
                if (_conn.State == ConnectionState.Closed)
                {
                    try
                    {
                        _conn.Open();
                    }
                    catch
                    {
                        return null;
                    }
                }
                return _conn;
            }
            set
            {
                _conn.Close();
            }
        }
   }
   TestXtraGrid.cs
   SqlConnManager dbManager = new SqlConnManager(System.Configuration.ConfigurationManager.AppSettings["ConnenctionString"].ToString());
   DataSet ds = new DataSet();  
    using(SqlDataAdapter adapter= new SqlDataAdapter ("select parent from Master",dbManager.GetSqlConn))
   {
        adapter.Fill(ds,"master");        
   }
//相同的方法过去子表的集合
//定义两个表之间的关系
System.Data.DataRelation relation = new System.Data.DataRelation("master-detail",ds.Tables[0].Columns["Master"],ds.Tables[1].Columns["Child"]);
 ds.Relations.Add(relation);
//最后将此数据集绑定到XtraGrid