Android Question load to application start application .csv file

[fgh3966]

Hello Everybody

I want to load a file for example csv file, that are into the directory Téléchargement and use it as if it had been supported by this sub.

Private Sub HandleLoadResult(Result As LoadResult)
    If Result.Success Then
        Try
            Dim Reader As TextReader
            Reader.Initialize(File.OpenInput(Result.Dir, Result.FileName))
'             Dim line As String
            line = Reader.ReadLine
'            stringList.Add(line)
            Do While line <> Null
                line = Reader.ReadLine
                stringList.Add(line)
                increm = increm +1        ' nombre lignes dans le CSV
            Loop
            Reader.Close
    '        chainetexte = File.ReadString(Result.Dir, Result.FileName)
            toast.Show($"File '${Result.RealName}' loaded"$)
        Catch
            chainetexte = "Error loading file"
            'Log(LastException)
        End Try
    End If
'    LoadGTR2
    Log ("nbre lignes  "&increm)
'    txtField.Text = chainetexte   
End Sub

It is possible ?

Thanks.

 

[Erel]

Use StringUtils.LoadCSV or CSVParser: [B4X] CSVParser - CSV parser and generator

 

[fgh3966]

Hello all

Excuse my bad English

The process around Reader is difficult to understand.
When starting application, Reader should load with a csv file and the file name and path would be indicated by variables.
I think that i need two variables : One for the path and another for the file name.

I wrote the code below: it is executed but Reader did not load the csv file

Private Sub HandleGO '(Result) ' As LoadResult)
Dim ffile, ppath As String
ppath = "Download"
ffile = "file2023.csv"

        Try
            Dim Reader As TextReader
            Reader.Initialize(File.OpenInput(ppath, ffile))
            
            etc ...

End Sub

Any help please ?

 

[DonManfred]

Any help please ?

remove the try catch block and watch out for errors.

 

[fgh3966]

in red color debugger say >>> Caused by: java.io.FileNotFoundException: Download/file2023.csv (No such file or directory)
It's android 8.01
How to know path into android with b4a ? I think the ls -l command is not working?

 

[teddybear]

in red color debugger say >>> Caused by: java.io.FileNotFoundException: Download/file2023.csv (No such file or directory)
It's android 8.01
How to know path into android with b4a ? I think the ls -l command is not working?

Why do you use the Download directory? do you know its absolute path? where is the file2023.csv from?

 

[fgh3966]

I use the Download folder because it seems simple for users, maybe the documents folder?
If you recommend other places I'm willing to try.
I would like to code an app that is easy to use and if possible not too complicated to program .

file2023.csv are into download directory

 

[teddybear]

I use the Download folder because it seems simple for users, maybe the documents folder?
If you recommend other places I'm willing to try.
I would like to code an app that is easy to use and if possible not too complicated to program .

file2023.csv are into download directory

Where is the file2023.csv from, third App? see your post#1, you are using contentchooser to get file, the directory is contentDir

 

[fgh3966]

I use using contentchooser to get file because this function are coded into an example (I don't really understand how it works)
New i want to load a csv file into Reader object or variable by specifying the path and name of the csv file

file2023.csv file are into Download directory

 

[DonManfred]

by specifying the path and name of the csv file

both are available in the ContentChooser Result event.

    Wait For CC_Result (Success As Boolean, Dir As String, FileName As String)

You can use Dir and Filename in this Event

 

[teddybear]

both are available in the ContentChooser Result event.

    Wait For CC_Result (Success As Boolean, Dir As String, FileName As String)

You can use Dir and Filename in this Event

The example in post #1 it can read text file using CC, I don't know why to read file2023.csv by specified Download path in Post #3? so I asked where the file2023.csv is from.

 

[fgh3966]

Into filehandler i copy and rename Load As ResumableSub and disable cc.Show("text/*", "Choose text file")

Public Sub StartLoad As ResumableSub
    Dim cc As ContentChooser
    cc.Initialize("cc")
'    cc.Show("text/*", "Choose text file")
    Wait For CC_Result (Success As Boolean, Dir As String, FileName As String)
    Dim res As LoadResult = CreateLoadResult(Success, Dir, FileName)
    If res.Success Then ExtractInformationFromURI(res.FileName, res)
    Return res
End Sub

Public Sub Load As ResumableSub
    Dim cc As ContentChooser
    cc.Initialize("cc")
    cc.Show("text/*", "Choose text file")
    Wait For CC_Result (Success As Boolean, Dir As String, FileName As String)
    Dim res As LoadResult = CreateLoadResult(Success, Dir, FileName)
    If res.Success Then ExtractInformationFromURI(res.FileName, res)
    Return res
End Sub

and into B4Xmainpage i copy btnload_clik sub

Private Sub BtnLoad_Click 
    #if B4A
    Wait For (FileHandler1.Load) Complete (Result As LoadResult)
    #else if B4i
    Wait For (FileHandler1.Load(Me, B4XPages.GetNativeParent(Me).TopRightButtons.Get(1))) Complete (Result As LoadResult)
    #end if
    'txtField.textfield.enabled = True
    HandleLoadResult(Result)
End Sub

private Sub StartBtnLoad 
    #if B4A
    Wait For (FileHandler1.StartLoad) Complete (Result As LoadResult)
    #else if B4i
    Wait For (FileHandler1.Load(Me, B4XPages.GetNativeParent(Me).TopRightButtons.Get(1))) Complete (Result As LoadResult)
    #end if
    'txtField.textfield.enabled = True
    HandleLoadResult(Result)
End Sub

Now I have to pass variables between sub and classes.