为什么提交数据时老是提示:“未将对象引用设置到对象的实例”
我在WEB页中执行这个方法时就出错。
我的代码是这样的,请各位帮我看看:
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public void AddOrder(OrderClass newOrder)
{
//提交数据;
//Conn.Open();
Adapter.SelectCommand.CommandText = "Select * From Order";
Adapter.SelectCommand.Connection =Conn;
SqlCommandBuilder cb = new SqlCommandBuilder(Adapter);
Conn.Open();
ds = this.GetSelectData("Select * From Order");
DataRow dr = ds.Tables["Order"].NewRow();
dr["Order"] = newOrder.Order;
dr["Category"] = newOrder.Categoty;
dr["Date"] = newOrder.Date;
dr["Term"] = newOrder.Term;
ds.Tables["Order"].Rows.Add(dr);
Adapter.Update(ds,"Order");
}