[DevExpress Support Team: CLONED FROM T295902: ASPxFileManager - FileManagerItem.Id property returns Name and not Id when binding a control to a data source]
Dear Sirs,
sorry - but the hotfix is not working -
for example:
Public Overrides Function GetLastWriteTime(ByVal file As FileManagerFile) As DateTime
file.folder.id '< wrong…
End Function
The file contains the property folder. the folder.id is not the id but the path…
Kind Regards…
ASPxFileManager - FileManagerItem.Id property returns Name and not Id when binding the control to a custom provider
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Answers approved by DevExpress Support
created 9 years ago
(modified 8 years ago)
We have fixed the issue described in this ticket and will include the fix in our next maintenance update. To apply this solution before the official update, request a hotfix by clicking the corresponding link for product versions you require.
Note: Hotfixes may be unavailable for beta versions and updates that are about to be released.
Additional information:
We have fixed this issue in the next version of our controls: starting with version 15.1.10, the FileManagerItem.ID property will contain a folder identifier. However, there is still one important detail that should be implemented in your project.
ASPxFileManager doesn't provide the ID value for a root folder of the custom file system because the control cannot determine the root folder in a custom file system. So, it is necessary to explicitly identify the root folder in the arguments of the FileSystemProvider using an empty relative name as shown below:
Visual BasicProtected Function FindFolderItem(ByVal folder As FileManagerFolder) As FileSystemData
If String.IsNullOrEmpty(folder.RelativeName) Then
Return GetRootFolder()
End If
Dim folders = DataSource.Where(Function(x) x.IsFolder)
Return ( _
From item In folders _
Where item.IsFolder AndAlso item.Id.ToString = folder.Id _
Select item).FirstOrDefault()
End Function
C#protected FileSystemData FindFolderItem(FileManagerFolder folder) {
if (string.IsNullOrEmpty(folder.RelativeName)) {
return GetRootFolder();
}
var folders = DataSource.Where(x => x.IsFolder);
return (from item in folders where item.IsFolder && item.Id.ToString() == folder.Id select item).FirstOrDefault();
}
I have attached the modified project to my answer.
- v15.2.5Download Official Update
- v15.1.10Download Official Update
In this scenario, the Id property value should be manually passed in the FileSystemProviderBase.GetFiles / FileSystemProviderBase.GetFolders method using the corresponding overloads:
FileManagerFolder(FileSystemProviderBase provider, FileManagerFolder parentFolder, string name, string id)
FileManagerFile(FileSystemProviderBase provider, FileManagerFolder parentFolder, string fileName, string id)
I've attached a sample and a video illustrating this approach in action.
If your scenario is different, feel free to modify the attached sample or send us your own runnable project where the problem exists.
Thanks,
Artem
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Hello,
I was able to reproduce the issue, and it appears that not all the FileManagerItems have a correct Id. For example, when a FileManagerFile instance is created, its Folder object is created again (instead of assigning the reference to the FileManagerFolder object passed in the constructor parameter). That is why in certain scenarios (when you have files in a folder, this folder cannot be found in the FindFileItem method), you get the NullReference error.
Taking this into account, I have found why ASPxFileManager was not working: the root folder has the Id = "" (empty string). I suggest you update the FindFolderItem method in order to run your application:
C#Protected Function FindFolderItem(ByVal folder As FileManagerFolder) As FileSystemData
Dim folders = DataSource.Where(Function(x) x.IsFolder)
If folder.Id = "" Then
Return folders.First()
End If
Return ( _
From item In folders _
Where item.IsFolder AndAlso item.Id.ToString = folder.Id _
Select item).FirstOrDefault()
End Function
The main issue is the FindFileItem method. Here, the following line returns Nothing:
C#Protected Function FindFileItem(ByVal file As FileManagerFile) As FileSystemData
Dim folderItem As FileSystemData = FindFolderItem(file.Folder)
This happens because the file.Folder does not reference the custom folder you created, but references the base class folder with an auto-generated Id that is a relative path to the file.
I suggest you change this method, so that you can pass a new FileManagerFolder instance (with your custom Id) and not the file.Folder reference into the FindFolderItem method.
I have passed this ticket to our developers for further research. We will update this ticket as soon as we get any results.
BK
9 years ago
HI,
It seems I have same problem, FindFileItem function return null coz relativename from FileManager contain more path,ie:
rootParentFolder\ChildFolder\SubchildFolder\filename.extension
Meanwhile, GetRelativeName function called by FindFolderItem return not complete as from FileManager properties
It's always return \ChildFolder\SubchildFolder\filename.extention
Hello,
If you are using a version older than 15.1.10, I suggest that you upgrade our components to v15.1.10 or to v15.2.9 (if you are using the 15.2 build). These versions contain fixes for this issue. If the problem persists, please create a new ticket dedicated to the issue and describe it in greater detail. We will also appreciate it if you attach a test project for research.