将 DataReader 做为数据源绑定到 DataGrid 控件

显示结果

CategoryID	CategoryName	Description
1	Beverages	Soft drinks, coffees, teas, beers, and ales
2	Condiments	Sweet and savory sauces, relishes, spreads, and seasonings
3	Confections	Desserts, candies, and sweet breads
4	Dairy Products	Cheeses
5	Grains/Cereals	Breads, crackers, pasta, and cereal
6	Meat/Poultry	Prepared meats
7	Produce	Dried fruit and bean curd
8	Seafood	Seaweed and fish

源代码：

            SqlDataReader dr;
            
             void  Page_Load( object  sender, System.EventArgs e)
             {
                // 数据连接字符串及 SQL 语句
                string ConnStr = System.Configuration.ConfigurationSettings.AppSettings["ConnectionSqlServer"];
                string query = "SELECT * FROM Categories";

                // 创建并打开数据库连接
                SqlCommand myCommand = new SqlCommand(query, new SqlConnection(ConnStr));
                myCommand.Connection.Open();
                
                // 执行数据库操作并返回 DataReader 对象
                dr = myCommand.ExecuteReader();

                // 将 DataReader 做为数据源绑定到 DataGrid
                DataGrid1.DataSource = dr;
                DataGrid1.DataBind();

                // 关闭 DataReader 对象和数据库连接
                dr.Close();
                myCommand.Connection.Close();
            }