我如何返回一个唯一的列表'listColl'我尝试使用底部的'Distinct9'和'return listColl;'但收到一个错误。但它没有工作。目前这返回一个重复的项目列表... [英] How would I return a unique list 'listColl' I tried using 'Distinct9' at the bottom with 'return listColl;' but received an error.but it didnt work. Currently this return a duplicate list of items...

问题描述

  public 列表< SPWeb> GetAllWebs（ string  webURL）
 {
  string  url = System.Web.HttpUtility .UrlDecode（WEBURL）; 
 
列表< SPWeb> webColl =  new 列表< SPWeb>（）; 
 尝试 
 {
 ClientContext clientContext =  new  ClientContext（url） ; 
 Web oWebsite = clientContext.Web; 
 
 clientContext.Load（oWebsite，
 website = >  website.Webs，
 website = >  website.Title，
 website = >  website.Id，
 website = >  website.ServerRelativeUrl 
）; 
 clientContext.ExecuteQuery（）; 
 
  foreach （Web oneWeb  in  oWebsite.Webs）
 { 
 webColl.Add（ new  SPWeb 
 {
 Title = oneWeb.Title，
 WebGUID = oneWeb.Id.ToString （），
 ServerRelativeUrl =（url + oneWeb.ServerRelativeUrl）.Replace（ @  \， ），
}）; 
} 
} 
  catch （例外情况）
 {
  //  错误日志 
  string  error = ex.Message + < span class =code-string>  GetAllWebs中的错误; 
} 
 返回 webColl; 
} 
 
  public 列表< SPList> GetAllLibraries（ string  webURL）
 {
  var  listColl =  new  List< SPList>（）; 
 ClientContext _ctx =  new  ClientContext（webURL）; 
 尝试 
 {
  var  currentWeb = _ctx.Web; 
  var  AllLists = currentWeb.Lists; 
 _ctx.Load（AllLists）; 
 _ctx.ExecuteQuery（）; 
  var  query = 来自 list   currentWeb.Lists 
  where  list.BaseType == BaseType.DocumentLibrary 
  select 列表; 
 
  var  listCollection = _ctx.LoadQuery（query.Include（myList = >  myList.Title，
 myList = >  myList.Id，
 myList = >  myList.RootFolder.ServerRelativeUrl，
 myList = >  myList.ParentWebUrl，
 myList = >  myList.Hidden，
 myList = >  myList.IsApplicationList））; 
 _ctx.ExecuteQuery（）; 
 
  //   / *  
 
 listColl。 AddRange（（ from  list  in  listCollection 
 其中！list.Hidden 
  select   new  SPList 
 {
 Title = list.Title，
 ListGUID = list.Id.ToString（），
 RootFolderServerRelativeUrl = list.RootFolder.ServerRelativeUrl，
 ParentWebUrl = list.ParentWebUrl 
  //  下面区分不工作 
}）。Distinct（））; 
 
  //  } * /  
  foreach （ var 项 in  listCollection）
 {
 listColl.Add（ new  SPList 
 {
 Title = Item.Title，
 RootFolderServerRelativeUrl = Item.RootFolder.ServerRelativeUrl， 
 ListGUID = Item.Id.ToString（）
}）; 
} 
} 
  catch （例外情况）
 {
  //  错误日志 
  string  error = ex.Message + < span class =code-string>  GetAllLibraries中的错误; 
} 
  //  返回错误 
  //   return listColl.Distinct（）;  
  return  listColl; 
} 
 

解决方案

嗨会员，



这样想吧 - Default Distinct 方法如何知道如何比较你的对象（类型 SPList ）然后决定哪些是不同的？ （它将使用默认的比较器，它不适合你 - 也许可以看到区别的msdn文档？）



只需使用重载列表。与IEqulaityComparere或为你的SPList类实现IEquatable。



http://msdn.microsoft.com/EN-US/library/bb348436（v = vs.110）的.aspx

public List<SPWeb> GetAllWebs(string webURL)
{
    string url = System.Web.HttpUtility.UrlDecode(webURL);

    List<SPWeb> webColl = new List<SPWeb>();
    try
    {
        ClientContext clientContext = new ClientContext(url);
        Web oWebsite = clientContext.Web;

        clientContext.Load(oWebsite,
            website => website.Webs,
            website => website.Title,
            website => website.Id,
            website => website.ServerRelativeUrl
            );
        clientContext.ExecuteQuery();

        foreach (Web oneWeb in oWebsite.Webs)
        {
            webColl.Add(new SPWeb
            {
                Title = oneWeb.Title,
                WebGUID = oneWeb.Id.ToString(),
                ServerRelativeUrl = (url + oneWeb.ServerRelativeUrl).Replace(@"\", ""),
            });
        }
    }
    catch (Exception ex)
    {
        // error log
        string error = ex.Message + " Error within GetAllWebs ";
    }
    return webColl;
}

public List<SPList> GetAllLibraries(string webURL)
{
    var listColl = new List<SPList>();
    ClientContext _ctx = new ClientContext(webURL);
    try
    {
        var currentWeb = _ctx.Web;
        var AllLists = currentWeb.Lists;
        _ctx.Load(AllLists);
        _ctx.ExecuteQuery();
        var query = from list in currentWeb.Lists
                    where list.BaseType == BaseType.DocumentLibrary
                    select list;

        var listCollection = _ctx.LoadQuery(query.Include(myList => myList.Title,
                                      myList => myList.Id,
                                      myList => myList.RootFolder.ServerRelativeUrl,
                                      myList => myList.ParentWebUrl,
                                      myList => myList.Hidden,
                                      myList => myList.IsApplicationList));
        _ctx.ExecuteQuery();

      //   /*

        listColl.AddRange( (from list in listCollection
                           where !list.Hidden
                           select new SPList
                           {
                               Title = list.Title,
                               ListGUID = list.Id.ToString(),
                               RootFolderServerRelativeUrl = list.RootFolder.ServerRelativeUrl,
                               ParentWebUrl = list.ParentWebUrl
                           //below Distinct not working
                           }).Distinct() );

   // } */
        foreach (var Item in listCollection)
        {
            listColl.Add(new SPList
            {
                Title = Item.Title,
                RootFolderServerRelativeUrl = Item.RootFolder.ServerRelativeUrl,
                ListGUID = Item.Id.ToString()
            });
        }
    }
    catch (Exception ex)
    {
        // error log
        string error = ex.Message + " Error within GetAllLibraries ";
    }
    //return error
    //return listColl.Distinct();
    return listColl;
}

解决方案

Hi Member,

Think it this way - how should the Default Distinct method "know" how to compare your objects (of type SPList) and then decide which are distinct? (it will use the Default comparer which will not work for you - maybe see the msdn documentation for Distinct?)

Just use the overload list.Distinct with an IEqulaityComparere or implement IEquatable for your SPList class.

http://msdn.microsoft.com/EN-US/library/bb348436(v=vs.110).aspx

这篇关于我如何返回一个唯一的列表'listColl'我尝试使用底部的'Distinct9'和'return listColl;'但收到一个错误。但它没有工作。目前这返回一个重复的项目列表...的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！