1. 我的指令表如下:
orderid, clientid, [columns for order details] ...
然后,我用数据GridView向特定客户显示这一表格。 页: 1 但是,由于<代码>orderid是自动编号的主要钥匙,clientid是固定的。
不幸的是,在数据Grid意见中添加新行时,这些新行并不坚持到数据库中。 我认为,这是因为,每当数据GridView插入新行时,orderid到<-1>>和/或clientid到null的缺省,但由于这些栏目隐藏在用户手中,无法更改。
如果插入新的行文,我如何能够自动选择<代码>clientid/code>对目前展示的客户违约?
看来,我可以把用户“Add子”活动捉trap见肘,人工确定正确的价值:
private void myDataGridView_UserAddedRow(object sender, DataGridViewRowEventArgs e)
{
myDataGridView[clientidColumn.Index, e.Row.Index - 1].Value = clientid;
}
现在,这种新订单一直维持在数据库中,尽管似乎只是一种比照的黑体(需要打e.Row.Index - 1?)。 难道没有办法规定新行各栏的缺省值?
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