Linq 修改表中單個字段的值及多個字段的值

一、修改單列的值

//這個方法是根據主鍵修改指定列的值。所以在傳值的時候

WEBSITEBOOKSERVICE item=new WEBSITEBOOKSERVICE();
item.ID=20;
item.ISAVAIL=1;

public int UpdateAny(WEBSITEBOOKSERVICE item)

{

    int result = 0;

    using (var context = new WebShieldSysEntities())

    {

        context.WEBSITEBOOKSERVICE.Attach(item); 

        //ISAVAIL是數據庫中的字段名字

       var stateEntry = ((IObjectContextAdapter)context).ObjectContext.ObjectStateManager.GetObjectStateEntry(item); stateEntry.SetModifiedProperty("ISAVAIL");

       result = context.SaveChanges();

   }

   return result;

}

二、修改多列值

public int UpdateState(RULE_ITEM item)
{
    int result = 0;
    using (var context = new WebShieldSysEntities())
    {
        result=context.ObjectContext.ExecuteStoreCommand("update rule_item set ison=:ison where id=:id",
                                                          new Oracle.DataAccess.Client.OracleParameter(":ison", item.ISON),
                                                          new Oracle.DataAccess.Client.OracleParameter(":id",item.ID));
    }
    return result;
}