Re: using System.IO ----- File.Encrypt(); - C# Discussion Boards

Re: using System.IO ----- File.Encrypt();

N a v a n e e t h10-Nov-08 22:46

N a v a n e e t h

10-Nov-08 22:46

jay_t55 wrote:
but it still won't work.

What do you mean by not working? can you explain?

Navaneeth

How to use google | Ask smart questions

Re: using System.IO ----- File.Encrypt();

N a v a n e e t h10-Nov-08 22:25

N a v a n e e t h

10-Nov-08 22:25

jay_t55 wrote:
I tried the following code to encrypt but does not work:

Login to some other user account and try to open the encrypted file? File.Encrypt will encrypt the file and give access to the user account where this code is executed. AFAIK, this works only with NTFS file system.

Navaneeth

How to use google | Ask smart questions

Re: using System.IO ----- File.Encrypt();

jas0n2310-Nov-08 22:50

jas0n23

10-Nov-08 22:50

Thanks Navaneeth,

I just tried doing that, but it just won't encrypt the file. Frown | :-(

Regards,
j.t.

Re: using System.IO ----- File.Encrypt();

J4amieC10-Nov-08 23:08

J4amieC

10-Nov-08 23:08

Do you fulfil the requirements of the method?

From the docs: "The current file system must be formatted as NTFS and the current operating system must be Microsoft Windows NT or later."

I'm guessing your drive isn't NTFS

Re: using System.IO ----- File.Encrypt();

N a v a n e e t h10-Nov-08 23:19

N a v a n e e t h

10-Nov-08 23:19

jay_t55 wrote:
but it just won't encrypt the file

Are you expecting encrypt will make the file unreadable when you open it? AFAIK, the user who encrypted the file can still view it. Try to open the same file in another user account. Also make sure your file system is NTFS.

Navaneeth

How to use google | Ask smart questions

Re: using System.IO ----- File.Encrypt();

jas0n2311-Nov-08 0:03

jas0n23

11-Nov-08 0:03

Sorry about the late reply. My version of Windows is Vista Home basic, and it is NTFS formatted.

I have the code, it now successfully builds, and my applications starts. When I click on the link label to encrypt an existing file, I then sign out of my account and sign into a different user account and the file is still viewable. It has not been encrypted, yet there are no errors during debug. Wierd.

Re: using System.IO ----- File.Encrypt();

Mark Churchill11-Nov-08 16:40

Mark Churchill

11-Nov-08 16:40

Home Basic doesn't support filesystem level encryption of new files. It may (or this is limited to Premium) let you modify existing encrypted files.

Mark Churchill
Director, Dunn & Churchill Pty Ltd
Free Download: Diamond Binding: The simple, powerful, reliable, and effective data layer toolkit for Visual Studio.

Alpha release: Entanglar: Transparant multiplayer framework for .Net games.

Re: using System.IO ----- File.Encrypt();

jas0n2312-Nov-08 4:43

jas0n23

12-Nov-08 4:43

Thank you so much for that info Mark. Smile | :)

Regards,
j.t.

SelectedValue.ToString()

Melanie Booysen10-Nov-08 21:30

Melanie Booysen

10-Nov-08 21:30

greetings
i make use of the SelectedValue.ToString(); to display the selected value in a textbox; however instead of getting the value selected i get a numerical value. what should i do?

private void button2_Click(object sender, EventArgs e)
{
txt_comkey_tbl2.Text = lstTable2.SelectedValue.ToString();
}

the following code is used to populate the listbox
private void cmdReadTable2_Click(object sender, EventArgs e)
{
/* Display columns from the second table */
String DbTableName = "";
DbTableName = lstTables.Text.Trim();
OpenDb();
ReadTableColumns(2, DbTableName);
Table2 = DbTableName;
}

thank you in advance

Re: SelectedValue.ToString()

J a a n s10-Nov-08 21:51

J a a n s

10-Nov-08 21:51

Try

lstTable2.SelectedItem.Text

*jaans

Re: SelectedValue.ToString()

Melanie Booysen10-Nov-08 21:55

Melanie Booysen

10-Nov-08 21:55

i get the following error....

'object' does not contain a definition for 'text' and no extension method 'text' accepting a first argument of type 'object' could be found (are you missing a using directive or an assembly reference?)

dot text is not available for selecteditem property

Re: SelectedValue.ToString()

N a v a n e e t h10-Nov-08 22:13

N a v a n e e t h

10-Nov-08 22:13

Try

txt_comkey_tbl2.Text = lstTable2.SelectedItem == null ? string.Empty :
                          (string)lstTable2.SelectedItem;

Navaneeth

How to use google | Ask smart questions

Re: SelectedValue.ToString()

Melanie Booysen10-Nov-08 22:23

Melanie Booysen

10-Nov-08 22:23

i get an exception error "InvalidCastException was unhandled"
{"Unable to cast object of type 'System.Data.DataRowView' to type 'System.String'."}

Re: SelectedValue.ToString()

N a v a n e e t h10-Nov-08 22:28

N a v a n e e t h

10-Nov-08 22:28

What is the type of lstTable2 ?

Navaneeth

How to use google | Ask smart questions

Re: SelectedValue.ToString()

Melanie Booysen10-Nov-08 22:47

Melanie Booysen

10-Nov-08 22:47

it's a listbox.

Re: SelectedValue.ToString()

ScottM111-Nov-08 1:43

ScottM1

11-Nov-08 1:43

What objects are you putting into the listbox?
Remember that a listbox will call ToString() on the object and display that in the listbox.
If you get the selected value it will return the object, rather get selected text.

Re: SelectedValue.ToString()

Melanie Booysen11-Nov-08 1:57

Melanie Booysen

11-Nov-08 1:57

lstTable2.SelectedItem.ToString()

i used the above and it didn't work. i went back to the code where i accessed the tables through the dataview, datatable and show that the value member for the table was "data_type" and not the actual table name
below is the corrected code:

lstTable1.DataSource = TableView;
lstTable1.DisplayMember = "COLUMN_NAME";
lstTable1.ValueMember = "COLUMN_NAME"; //It was a "DATA_TYPE";

thank you all for the help
cheers

Re: SelectedValue.ToString()

Melanie Booysen11-Nov-08 2:03

Melanie Booysen

11-Nov-08 2:03

lstTable2.SelectedItem.ToString()

i used the above and it didn't work. i went back to the code where i accessed the tables through the dataview, datatable and show that the value member for the table was "data_type" and not the actual table name
below is the corrected code:

lstTable1.DataSource = TableView;
lstTable1.DisplayMember = "COLUMN_NAME";
lstTable1.ValueMember = "COLUMN_NAME"; //it was "DATA_TYPE" initially hence the display was wrong

thank you all for the help
cheers

Write an Array to Excel

DJ24510-Nov-08 21:29

DJ245

10-Nov-08 21:29

could any one please tell how to export an array to an Excel file
in web application.

Actually my requiremnt id to export data(array) from flex to excel.
If I get the method for writing array to excel, i think i can very well
meet my requirment.

please reply

Re: Write an Array to Excel

N a v a n e e t h10-Nov-08 21:34

N a v a n e e t h

10-Nov-08 21:34

Loop through your array and write each row to excel.

Navaneeth

How to use google | Ask smart questions

Re: Write an Array to Excel [modified]

DJ24510-Nov-08 23:04

DJ245

10-Nov-08 23:04

Can u give me an example?

I want to write the array to excel ( get it saved in excel)

not just using Response like given below
//Response.ContentType = "application/vnd.xls";

//System.IO.StringWriter stringWrite = new System.IO.StringWriter();

//System.Web.UI.HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);

//stringWrite.Write("hai");

//Response.Write(stringWrite.ToString());

Regards,
KP

modified on Tuesday, November 11, 2008 5:39 AM

Using WMI for Using the POSDevice class

hariakuthota10-Nov-08 21:18

hariakuthota

10-Nov-08 21:18

Hi all,

I am new to the POS For Net applications.In my application i want to add the logical names for the devices using the POSDevice class methods "Addname" but i am not able to use these fucntions with POSDevice object.
I have googled and found out that it shud be doen using WMI concepts can anyone suggest me how to do that?????

And is the WEPOS OS installation mandatory for using the WMI conecpts?????????

Thanks in advance...

Reporting Expression

Programm3r10-Nov-08 21:01

Programm3r

10-Nov-08 21:01

Hi all,

I am currently working on a report and I'm making use of Microsoft Reporting Services and Visual Studio 2008. Furthermore I'm trying to make use of a report expression to handle / accommodate fields within the report that will have empty / null values. My expression is currently looking like this:

=Switch(Fields!TAGS.Value.ToString().Trim().Equals(String.Empty), "No Tags",
IsNothing(Fields!TAGS.Value.ToString()), "No Tags",
Fields!TAGS.Value.ToString().Contains("BIBO"), "YES",
Not Fields!TAGS.Value.ToString().Contains("BIBO"), No)

The problem is that when I run the report, some of the values of Fields!TAGS.Value does not match with any statement in the switch, and I know that the value is equal to nothing (empty) in the database.

So how can I handle / accommodate for this occurrence?

Many thanks in advance
Kind regards,

The only programmers that are better those C# programmers are those who code in 1's and 0's Green Alien | [Alien]

Programm3r
My Blog: ^_^

how to read selected text from text file and how to convert selected text into msacess database

sukhjinder198210-Nov-08 20:50

sukhjinder1982

10-Nov-08 20:50

how to read selected text from text file in c#.net and how to convert selected text into ms acess database
suppose sample.text
conatian some data
---------------------
this is my firsrt proram
cust id -3444
invoice no-434
----------------
how to get text of custid and how to save in ms acess pls solve my problem as soon as posible

Re: how to read selected text from text file and how to convert selected text into msacess database

Ashfield10-Nov-08 21:13

Ashfield

10-Nov-08 21:13

1. Create Access Database and Tables
2. Depending on the format of the file either use Access Import or write some code to read the file and insert the records

There you go.

Bob
Ashfield Consultants Ltd

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.