Visual Basic

Eddy Vluggen18-Dec-16 1:16

18-Dec-16 1:16

Alienoiz wrote:
ok.. but is there a condition that i can use so that when it finds no table it "do nothing" for eg.

You are now using "ds.Tables(0)", without checking if there is a table at that index.

And yes, that would probably be too cryptic if you don't understand what the code is doing.

Alienoiz wrote:
and can you show me how to dispose the XMLReader considering the code i have.

xmlFile.Dispose()

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User 989707418-Dec-16 7:41

18-Dec-16 7:41

ok..so how can i check if there is a table for this case?

Thanks!

modified 7-Jan-19 21:02pm.

User 989707419-Dec-16 1:57

19-Dec-16 1:57

I believe that my code is almost ready..i just need to fix the table thing and it seems that the xmlfile.Dispose() it is only working when the code is inside a button click instance!
I was trying to use the MonthCalendar data change so that when i select a date in it, it automatically shows the Memo for that date...it works but then it conflicts again with the saving!

modified 7-Jan-19 21:02pm.

Eddy Vluggen19-Dec-16 5:15

19-Dec-16 5:15

Alienoiz wrote:
i just need to fix the table thing

You may need a bit more, but yes, you should check the length of the array before using it.

Alienoiz wrote:
it seems that the xmlfile.Dispose() it is only working when the code is inside a button click instance!

Only works when the variable is in scope.

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User 989707419-Dec-16 5:18

19-Dec-16 5:18

ok..can you show me the code to fix both things? or at least the table thing!!???
I am not able to fix it by myself!!!

modified 7-Jan-19 21:02pm.

Eddy Vluggen19-Dec-16 5:23

19-Dec-16 5:23

Alienoiz wrote:
ok..can you show me the code to fix both things

I could, but then I'd be fixing the next issues also. I'll gladly help, but you seriously need to learn some of the basics before attempting projects.

MessageBox.Show(ds.Tables.Count)

That would show you how many tables are in the dataset. You need to do "nothing" if there are 0 tables there. So, something along the lines of "Ff (ds.Tables.Count = 0) Then"..

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User 989707419-Dec-16 5:50

19-Dec-16 5:50

ok..i guess i solved the table problem..just do not know how to close the xmlfile.reader so it allows me to save at will!

modified 7-Jan-19 21:02pm.

Eddy Vluggen19-Dec-16 7:34

19-Dec-16 7:34

Alienoiz wrote:
just do not know how to close the xmlfile.reader so it allows me to save at will!

If you create a reader (or a writer) object, then it needs to be disposed - in the same method where you are creating it.

The simpeler option is to wrap the reader in a using statement.

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User 989707419-Dec-16 7:36

19-Dec-16 7:36

yes i saw something about Using and End Using, but i do not know how to apply in my code : )

modified 7-Jan-19 21:02pm.

Eddy Vluggen19-Dec-16 7:58

19-Dec-16 7:58

That's why we have documentation, examples and tutorials. The syntax for a using-statement is not complicated.

If you want to modify code, you'll have to learn those things Smile | :)

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User 989707419-Dec-16 8:10

19-Dec-16 8:10

i usually learn better with examples..when i apply something here and there i memorize and i know how to do later for other code..i also keep some records of code to use when i need : )
Thats why i started this project by trying the .ini method...i was already familiarized with it : )
..you said for me to change into xml..i did and i already learn a lot of new code ehe

Thanks... at least my gadget is evoluting... i would like to solve the issue about the saving!

modified 7-Jan-19 21:02pm.

Eddy Vluggen19-Dec-16 8:32

19-Dec-16 8:32

Alienoiz wrote:
i usually learn better with examples.

We all learn in a similar way, and yes, examples help a lot. That's why the documentation on MSDN contains an example for most classes and methods. It also contains the syntax, which explains which construction the compiler expects.

Alienoiz wrote:
when i apply something here and there i memorize and i know how to do later for other code

Sorry, but that's not going to work, since the thing you may remember may be required in a slightly different way, or needs to modified a tiny bit, or extended a tiny bit. Get a book, learn basics, and get in the habit of looking up every statement that you don't understand on MSDN.

Alienoiz wrote:
Thats why i started this project by trying the .ini method...i was already familiarized with it : )

The problem there would be that initialization files are outdated, and they were never meant as a data-store.

Alienoiz wrote:
..you said for me to change into xml..i did and i already learn a lot of new code ehe

Yup, that's true; and you seem willing enough to learn and try.

Alienoiz wrote:
i would like to solve the issue about the saving!

Type the word "using" as the first word on the line below in your code, and see what happens;

xmlFile = XmlReader.Create(filePath, New XmlReaderSettings())

I'll leave it up to you to figure out where to end the using Smile | :)

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User 989707419-Dec-16 8:50

19-Dec-16 8:50

it is not working..i tried to "end using" before than every "end if" and it is not working in any place Frown | :(

modified 7-Jan-19 21:02pm.

Eddy Vluggen19-Dec-16 9:01

19-Dec-16 9:01

The "end using" is placed usually after the last time (the last line of code) you actually need the object you're using. After the end-using the object is no longer valid. Depending on your code, that may be the last line of the method.

Alienoiz wrote:
and it is not working in any place

What does "not working" mean? I know you got a message from the compiler, but which one?

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User 989707419-Dec-16 9:10

19-Dec-16 9:10

this is my code..!

Private Sub MonthCalendar1_DateChanged(sender As Object, e As DateRangeEventArgs) Handles MonthCalendar1.DateChanged
    TextBox1.Text = MonthCalendar1.SelectionRange.Start.ToShortDateString()
    Dim folderPath As String = Directory.GetCurrentDirectory()
    Dim filePath As String = Path.Combine(folderPath, "MEMOS\Database.xml")
    If Not File.Exists(filePath) Then
        MessageBox.Show("DataBase not found!")
    Else
        Dim sav = TextBox1.Text
        Dim xmlFile As XmlReader
   Using xmlFile = XmlReader.Create(filePath, New XmlReaderSettings())
            Dim ds As New DataSet
            Dim dv As DataView
            ds.ReadXml(xmlFile)
            Dim dset = ds.Tables.Count
            If dset = 1 Then
                dv = New DataView(ds.Tables(0))
                dv.Sort = "Date"
                Dim index As Integer = dv.Find(sav)

                If index = -1 Then
                    MsgBox("Nothing set for this date!")
                Else
                    ComboBox1.Text = (dv(index)("HOUR").ToString())
                    ComboBox2.Text = (dv(index)("MINUTES").ToString())
                    ComboBox3.Text = (dv(index)("AMPM").ToString())
                    TextBox1.Text = (dv(index)("DATE").ToString())
                    TextBox2.Text = (dv(index)("PLACE").ToString())
                    TextBox3.Text = (dv(index)("NAME").ToString())
                    TextBox4.Text = (dv(index)("PHONE").ToString())
                    TextBox5.Text = (dv(index)("EMAIL").ToString())
                    TextBox6.Text = (dv(index)("HEADER").ToString())
                    TextBox7.Text = (dv(index)("MEMO").ToString())
                End If

                Return
            Else
                MessageBox.Show("No MEMOS in DataBase!")
            End If
        End Using
    End If

End Sub

in the lines :

Dim xmlFile As XmlReader

and

Using xmlFile = XmlReader.Create(filePath, New XmlReaderSettings())

the word "xmlFile" is underlined in green and red

modified 7-Jan-19 21:02pm.

Eddy Vluggen19-Dec-16 9:24

19-Dec-16 9:24

Alienoiz wrote:
the word "xmlFile" is underlined in green and red

Red means "error", which you already said. Hover your mouse over it, and it will display a message. Alternatively, you look in the error-window.

It may be "Type is not defined". The one on "XmlFile" would say that it hides another variable. And yes, you already declared a variable with that name. What happens if you remove the first declaration?

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User 989707419-Dec-16 23:20

19-Dec-16 23:20

it happens that the using function works .. but still is in conflict with the saving :s
!!!

modified 7-Jan-19 21:02pm.

Eddy Vluggen20-Dec-16 6:25

20-Dec-16 6:25

Alienoiz wrote:
it happens that the using function works .. but still is in conflict with the saving :s

In that case the file is locked by something else; is there a writer in another procedure? Are you viewing the file in an XML-editor while debugging? For example, if you open the XML file using Word, then Word will lock that file, causing an error if you try to read it.

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User 989707420-Dec-16 6:43

20-Dec-16 6:43

ok..i will dig harder..maybe another writer.. Smile | :)

modified 7-Jan-19 21:02pm.

User 989707423-Dec-16 1:56

23-Dec-16 1:56

My gadget is almost done .. i just have this small problem i cannot fix....when reading, the textbox does not shows multiline..it is joinning the text..but when writing, the paragraphs are written well!!
So if is good in the xml, the problem must be with the reading code...this is what i am using for read:

Private Sub MonthCalendar1_DateChanged(sender As Object, e As DateRangeEventArgs) Handles MonthCalendar1.DateChanged
        TextBox1.Text = MonthCalendar1.SelectionRange.Start.ToShortDateString()
        Dim folderPath As String = Directory.GetCurrentDirectory()
        Dim filePath As String = Path.Combine(folderPath, "MEMOS\Database.xml")
        If Not File.Exists(filePath) Then
            MessageBox.Show("DataBase not found!")
        Else
            Dim sav = TextBox1.Text

            Using xmlFile = XmlReader.Create(filePath, New XmlReaderSettings())
                Dim ds As New DataSet
                Dim dv As DataView
                ds.ReadXml(xmlFile)
                Dim dset = ds.Tables.Count
                If dset = 1 Then
                    dv = New DataView(ds.Tables(0))
                    dv.Sort = "Date"
                    Dim index As Integer = dv.Find(sav)

                    If index = -1 Then
                        MsgBox("Nothing set for this date!")
                        ComboBox1.Text = "01"
                        ComboBox2.Text = "00"
                        ComboBox3.Text = "AM"
                        TextBox2.Text = ""
                        TextBox3.Text = ""
                        TextBox4.Text = ""
                        TextBox5.Text = ""
                        TextBox6.Text = ""
                        TextBox7.Text = ""
                    Else
                        ComboBox1.Text = (dv(index)("HOUR").ToString())
                        ComboBox2.Text = (dv(index)("MINUTES").ToString())
                        ComboBox3.Text = (dv(index)("AMPM").ToString())
                        TextBox1.Text = (dv(index)("DATE").ToString())
                        TextBox2.Text = (dv(index)("PLACE").ToString())
                        TextBox3.Text = (dv(index)("NAME").ToString())
                        TextBox4.Text = (dv(index)("PHONE").ToString())
                        TextBox5.Text = (dv(index)("EMAIL").ToString())
                        TextBox6.Text = (dv(index)("HEADER").ToString())
                        TextBox7.Text = (dv(index)("MEMO").ToString())
                    End If

                    Return
                Else
                    MessageBox.Show("No MEMOS in DataBase!")
                End If
            End Using
        End If
    End Sub

any ideas?!!

TY!

modified 7-Jan-19 21:02pm.

Eddy Vluggen23-Dec-16 2:40

23-Dec-16 2:40

The code you have shown does not join any texts; on reading the contents of a textbox are replaced.

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User 989707423-Dec-16 2:44

23-Dec-16 2:44

yes they are supposed to be replaced...but is joinning the xml text!!!

modified 7-Jan-19 21:02pm.

Eddy Vluggen23-Dec-16 2:54

23-Dec-16 2:54

I'm not sure what you are seeing, but the assignment-code is not joining anything.

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User 989707423-Dec-16 2:59