Visual Basic

11-Sep-06 12:27

A network, any network, is not a trusted source for executable code. I suggest you read up on Code Access Security[^]. And, what's new[^] for CAS in the .NET Framework 2.0.

Dave Kreskowiak
Microsoft MVP - Visual Basic

datagrid and text files

Silver-Grey11-Sep-06 6:54

11-Sep-06 6:54

I would like to build a datagrid from a directory of text files. How do I get the files from the directory into the datagrid?

Thank you,

Silver-grey

silver-gray

Dave Kreskowiak11-Sep-06 12:33

11-Sep-06 12:33

Why would you want to use such a heavy-weight control to display a list of filenames?

Dave Kreskowiak
Microsoft MVP - Visual Basic

Silver-Grey12-Sep-06 3:58

12-Sep-06 3:58

Because that is the User Specs. If you don't know a way to get the files in the directory and write them to another file name, Please don't comment. I thought that this was to help!! with the question:

silver-gray

Dave Kreskowiak12-Sep-06 6:45

12-Sep-06 6:45

Silver-Grey wrote:
If you don't know a way to get the files in the directory and write them to another file name, Please don't comment.

OK, smart-ass...I just thought I would find out why the heavy wieght control needs to be used before I put the effort into commenting. Normally, a ListView is used for showing a list of filenames. Using a DataGrid for this is pretty odd, customer spec or no. I thought, "maybe this guy is a noobie and doesn't know any better. Let's find out first..."

Well, here's one way to do it...

Dim files As String() = Directory.GetFiles(directoryPath)
DataGridView1.Columns.Add( New DataGridViewTextBoxColumn() )
For Each f As String in files
    Dim fa As String() = {f}
    DataGridView1.Rows.Add(fa)
Next

This is probably not the best way to do it, but hey. I work out the specs with the customer and don't let them make the mistake of dictating them to me. You're supposed to work with the customer to come up with a proper solution, not for the customer.

Dave Kreskowiak
Microsoft MVP - Visual Basic

Silver-Grey12-Sep-06 7:05

12-Sep-06 7:05

I don't have a datagridview in tool box. Using 2003 Visual Studio

silver-gray

Dave Kreskowiak12-Sep-06 8:13

12-Sep-06 8:13

Great! More stuff I'm supposed to know without you explaining...

Let's see, my old .NET 1.x DataGrid is a bit rusty, but...

Dim files As String() = Directory.GetFiles(directoryPath)
Dim fa As New ArrayList()
fa.AddRange(files)
DataGrid1.DataSource = fa

Dave Kreskowiak
Microsoft MVP - Visual Basic

Silver-Grey12-Sep-06 9:33

Convert a string into byte array

12-Sep-06 9:33

That didn't work. I guess I will have to use a listbox. I can get data inti it. Now trying to select data out of it and write a new file with a different name.

Silver-grey

silver-gray

Will888888811-Sep-06 4:53

Will8888888

11-Sep-06 4:53

Could somebody tell me how to convert a string (0 to 255 range) to a byte array?

William

Guffa11-Sep-06 7:15

Guffa

11-Sep-06 7:15

Use the encoding of your choise and the GetBytes method:

messageArray = Encoding.ASCII.GetBytes("Hello world")

---
b { font-weight: normal; }

Will888888811-Sep-06 7:36

Will8888888

11-Sep-06 7:36

Hi,

Thank you very much for help. Your code just works for ASCII characters. What about the characters in the range from 0 to 255??

Thank you again,

William

William

Guffa11-Sep-06 8:16

Guffa

11-Sep-06 8:16

That's why I said that you should choose an encoding. Use the encoding that was used to create the string.

---
b { font-weight: normal; }

DirectX Programming with .Net

AlexeiXX311-Sep-06 9:02

AlexeiXX3

11-Sep-06 9:02

Dim textConverter As New System.Text.UTF8Encoding
Dim bytes() As Byte = textConverter.GetBytes("Text to convert")

Alexei Rodriguez

kannan m11-Sep-06 3:30

kannan m

11-Sep-06 3:30

hii i am kannan.currently im working with a project in VB.Net. the project is, i've to create a reader for pdf files.the reader uploading a pdf file and user can read it like a real magazine. and we know we are flipping/turns each page of a real magazine to go for the next/Previous page. I WANT THE SAME PAGE FLIP EFFECT IN MY PROJECT.i heard that directx + vb.net wil gimme a solution.
you can see an example reader at www.zinio.com, its free for download. i need the same effect in my project. I have a components that converts each page of a pdf file to image file, which then i need to animate. Can you suggest me some idea. Is it possible using directx.

if anyone have experince in Directx + .net, lemme know it

Datagrid related

Nikhil Bandekar11-Sep-06 3:01

Nikhil Bandekar

11-Sep-06 3:01

Hi friends,

One problem i am stuck in please try to help.

I want to create a code where, when user clicks one row of the datagrid filled with data, the particular column value for e.g. the value of second column of the selected row should be visible on the text field present on the same form after a click of a button.

The sequence will be

1. First user click and selects one row

2. Then clicks a particular button

3. As click event is fired the value present in the second column of the selected row displays in the textbox present on the same form.

Try helping out please.

Nikhil Bandekar
Mumbai,
India

Tamimi - Code11-Sep-06 3:08

Tamimi - Code

11-Sep-06 3:08

hi is this windows or web application ??

Tamimi - Code

Nikhil Bandekar11-Sep-06 5:00

Nikhil Bandekar

11-Sep-06 5:00

it is windows vb.net

i refered to the code u had given for hasan, regarding datagrid. I hope you would try to help me even. It seems you have good knowledge woking with datagrid

Nikhil Bandekar
Mumbai,
India

Tamimi - Code11-Sep-06 20:38

Tamimi - Code

11-Sep-06 20:38

hi put this line
TextBox1.Text = DataGrid1(DataGrid1.CurrentCell.RowNumber, 1)

on CurrentCellChanged event for thr datagrid or
on any button click

Tamimi - Code

Nikhil Bandekar12-Sep-06 1:54

Nikhil Bandekar

12-Sep-06 1:54

hiii

Thanks a lots it worked out... I was struggling from when.

Thanks again for the favor.

Big Grin | :-D

Bye
Take Care

Nikhil Bandekar
Mumbai,
India