小编use*_*165的帖子

我试图调用返回引用游标的Oracle存储过程,我需要从返回的数据生成树视图.我是新手,我有两个问题.

第一个问题是我无法调用该程序.我收到此错误:"调用'OBJECT_HIERARCHY'时参数的数量或类型错误"

而我的第二个问题是,当这个过程返回一个引用游标值时,我不明白我将如何获取该数据？该表中有超过5000条记录,我没有获得该数据,而是一个引用游标值.有人可以解释我如何使用ref游标值获取该数据.我没有使用Oracle的经验.

这是oracle中的过程定义:

CREATE OR REPLACE PROCEDURE SAD.object_hierarchy  
(nAppId IN NUMBER,
nParentId IN NUMBER DEFAULT -1, 
o_cRefCursor OUT SYS_REFCURSOR)
IS
BEGIN
IF NOT o_cRefCursor%ISOPEN THEN

  OPEN o_cRefCursor FOR 
     SELECT
        h.PARENT_ID, h.CHILD_ID, h.H_LEVEL,
        o.OBJECT_IDENTIFIER, o.OBJECT_TYPE_ID
     FROM
     (
        SELECT
           PARENT_ID, CHILD_ID, LEVEL AS H_LEVEL
        FROM OBJECT_RELATIONSHIPS
        START WITH PARENT_ID = nParentId --> -1 --= 60170
        CONNECT BY PRIOR CHILD_ID = PARENT_ID
     ) h
     INNER JOIN
        OBJECTS o
        ON
           o.OBJECT_ID = h.CHILD_ID AND
           O.APPLICATION_ID = nAppId;   
 END IF;
END object_hierarchy;

这些是表字段定义

Column …

我收到此错误"CS1928:

'System.Web.Mvc.HtmlHelper'不包含'DropDownListFor'的定义和最佳扩展方法重载'System.Web.Mvc.Html.SelectExtensions.DropDownListFor(System.Web.Mvc.HtmlHelper,System.Linq.Expressions) .Expression>,System.Collections.Generic.IEnumerable)'有一些无效的参数"

我的控制器看起来像这样

    public class IndexController : Controller
{
       public ActionResult Index()
       {
               EpfeSelectScreen model = new EpfeSelectScreen();

               var b = (from a in dbEntitiesErste.CONFIG_APPLICATIONS
                               orderby a.APPLICATION_ID
                               select new EPFE.CustomDataObjects.CustomObjects
                               {
                                   Text = a.APPLICATION_NAME,
                                   Value = a.APPLICATION_ID
                               });

               model.Application = b.OrderBy(x => x.Text).ToList();

               return View(model); 




       }
}

我的模特是这样的

    public class EpfeSelectScreen
{ 
    public string Search { get; set; }
    public string selectedApplication { get; set; }
    public List<SelectListItem> Country { get; set; }
    public List<CustomObjects> Application { get; set; …