LINQ 用法集锦一

绑定下拉菜单方法：<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

DepartmentsBusiness db = new DepartmentsBusiness();

IQueryable<COM_Departments> dp = db.GetDepartments("出版");

foreach(var a in dp)

{

ddlSearchDepartment.Items.Add(a.DepartmentName);

}

绑定DataList/DataGrid/GridView方法：

BargainDefineBusiness bdb = new BargainDefineBusiness();

var aa = bdb.GetBookInfoForView(str1);

//（GetBookInfoForView（）方法返回的是IQureable类型）

dlBookInfo.DataSource = aa;

dlBookInfo.DataBind();

删除数据的方法：

CCPressDataContext cp = new CCPressDataContext();

COM_BookInfoMaterial aa = cp.COM_BookInfoMaterial.Single(a => a.ID == id);

cp.COM_BookInfoMaterial.DeleteOnSubmit(aa);

cp.SubmitChanges();

在linq中，请问如何取得当前插入行的自增标识ID的值？

CCPressDataContext cp = new CCPressDataContext();

cp.PAY_BookExpensePerson.InsertOnSubmit(bookExpensePerson);

cp.SubmitChanges();

int a=bookExpensePerson.id;(即可取得自增长的id)。