I have initialized a general list and I want to save all Files and Folders from Sharepoint.

List<object> filesAndFolders = new List<object>();

I have loaded all files and folders from SharePoint and added them to the list and now I want to access FieldValues, but when I try to iterate through the list I can't access the file or folder because is being saved as an object{Microsoft.Sharepoint.Client.File} or Folder.

foreach(var item in filesAndFolders){
      //getFiledValues here
      item.ListItemAllFields.FiledValues .. 
}

I have an error saying that item.ListItemAllFields.FiledValues doesn't exist. How can I solve this and be able to save Files and Folders in one List? Thank you!

CodePudding user response：

You can check the type of object at run-time like this:

            List<object> filesAndFolders = new List<object>();
            foreach (var item in filesAndFolders)
            {
                if (item is Microsoft.Sharepoint.Client.File)
                {
                    var fileItem = item as Microsoft.Sharepoint.Client.File;
                    // do stuff with fileItem
                }
                else if (item is Microsoft.Sharepoint.Client.Folder)
                {
                    var folderItem = item as Microsoft.Sharepoint.Client.Folder;
                    // do stuff with folderItem
                }
                else
                {
                    // Oops, some other object type
                }
            }

Althogh I can't access @Fildor's fiddle due to company firewall, I believe he or she is suggesting one of the following more compact forms:

        foreach (var item in filesAndFolders)
            {
                if (item is Microsoft.Sharepoint.Client.File fileItem)
                {
                    // do stuff with fileItem
                }
                else if (item is Microsoft.Sharepoint.Client.Folder folderItem)
                {
                    // do stuff with folderItem
                }
                else
                {
                    // Oops, some other object type
                }
            }

or this

foreach (var item in filesAndFolders)
            {
                switch (item)
                {
                    case File fileItem:
                        // do stuff with fileItem
                        break;
                    case Folder folderItem:
                        // do stuff with folderItem
                        break;
                    default:
                        // Oops, some other object type
                        break;
                }
            }

which became possible in c# version 7.0.

CodePudding user response：

Use the ClientObject as a type in your list.

using Microsoft.SharePoint.Client.ClientObject;

List<ClientObject> filesAndFolders = new List<ClientObject>();

foreach(var item in filesAndFolders){
    //getFiledValues here
}