linq 获取数据库时间 或者执行其他带返回值的sql查询
using (LongXingDBDataContext db = new LongXingDBDataContext())
{
DeviceInfo di;
di = new DeviceInfo();
var a = db.ExecuteQuery<DateTime>("select getdate()",new object[] {});
di.CreateDate = a.First();
db.DeviceInfo.InsertOnSubmit(di);
db.SubmitChanges();
this.toolTip1.Show("保存完毕", this, ((Control)sender).Location, 2000);
}
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declare @XML XML
SET @XML='<root>
<OLDVALUE>
<H_Action id="1130">030</H_Action>
<D_Action>030</D_Action>
<OrderCompany>00220</OrderCompany>
<OrderNumber>10004035</OrderNumber> ......
在程序中我们可能经常会遇到这种情况,比如要取一个listbox里面的选择项,得到的结果可能是string ID="id1,id2,id3,id4",然后我们要把这些ID插入到数据库中,同时每个id对应的是要插入一条记录。实现的方法有很多,但是如果我们通过下面这个函数(RecurrentSplit)就能简单的达到 ......
源贴:http://topic.csdn.net/u/20100417/19/ebdc216a-acc9-4e04-80f3-dbada0b4f3fe.html?74846
数据类型:
Code char(6)
CreateTime datetime
Price float
Status bit
数据如下:
Code CreateTime Price Status
031002 2008-10-17 ......
采用预编译语句集,它内置了处理SQL注入的能力,只要使用它的setString方法传值即可:
String sql= "select * from users where username=? and password=?;
PreparedStatement preState = conn.prepare ......
1.连接数据库文件
<add name="LocalSqlServer" connectionString="Data Source=.\SQLExpress;Integrated Security=True;AttachDBFilename=|DataDirectory|TimeTracker.mdf;User Instance=true" />
SqlConnectionStringBuilder实例化时,要用到connectionString,如:SqlConnectionStringBuild builder = new SqlCon ......