Right now im using foreach loop to loop through all the items and update each item.Is there any way out using LINQ statement to do this so that i can avoid foreach loop.Thanks in Advance.All replies (3)Saturday,
下面是我用来创建客户端数据库的代码：SELECT substr(sys_connect_by_path(dutywork, ';'), 2) ...
还不如回到手动sql拼接的年代,但是技术总是向前发展的,终归还是要在linq上解决这一问题...,无意在网上发现一个还算比较简单的办法,分享一下: void ShowData() { using (DBDataContext db = new DBDataContext(...item.F_Money.ToString() + ""); } } } //得到合同金额大于6000,或合同名称中包含...
Console.WriteLine(item.AcNo); } // 调用自定义直接查询语句 IEnumerable list1 = db.ExecuteQuery(typeof(customer),"select * from customer where AcNo={0}",newobject[] {"6666"}); foreach(customer iteminlist1) { Console.WriteLine(item.Name); } IEnumerable<customer> list2 = db.ExecuteQuery<cu...
var results = GetData() // Large collection of data .AsParallel() .Select(item => Compute(item)) .ToList(); 说明:通过引入 ,LINQ 查询可以跨多个线程并行执行,从而可能显著提高 CPU 密集型操作的性能。但是,在使用此方法时,必须考虑线程安全性和并行化的开销。AsParallel() 通过批处理 高效处理大型...
If you know it's duplicated, then why are you trying to do anything with a duplicated item? in collection?All the items are not duplicate. The purpose is to identify all duplicated records, based on the columns selected, there is no primary key tor the list. The Linq query I provided ...
{//增加订单,使用循环方式添加一个foreach(variteminorderList) {varentity =dbContext.Insert(item); } } dbContext.SaveChanges(); } } 这里展示一个code,是我在一个多次插入的例子,还有很多是批量删除,批量更新都是用了foreach的方式 后来想,ef这么强大的工具不能就这样吧,所以开始 百度 ...
要创建这些 LINQ to SQL 类,最简单的方法是右键单击 Models 文件夹,选择Add,New Item,选择 LINQ to SQL Classes 模板,将类命名为 Movie.dbml,然后单击Add 按钮(如图 4 所示)。 图4:创建 LINQ to SQL 类(单击查看大图) 创建Movie LINQ to SQL 类之后,Object Relational Designer 将立即出现。可以将数据库...
LinqDataSourceUpdateEventArgs LinqDataSourceValidationException LinqDataSourceView ListBox ListControl ListItem ListItemCollection ListItemControlBuilder ListItemType ListSelectionMode ListView ListViewCancelEventArgs ListViewCancelMode ListViewCommandEventArgs ListViewDataItem ListViewDeletedEventArgs ListViewDeleteEventArgs List...
LinqDataSourceUpdateEventArgs LinqDataSourceValidationException LinqDataSourceView ListBox ListControl ListItem ListItemCollection ListItemControlBuilder ListItemType ListSelectionMode ListView ListViewCancelEventArgs ListViewCancelMode ListViewCommandEventArgs ListViewDataItem ListViewDeletedEventArgs ListViewDeleteEventArgs ...