Re: Access denied - C# Discussion Boards

I am BATMAN4-May-09 6:10

I am BATMAN

4-May-09 6:10

Navigate to that folder, view the properties -> security. Give Users write permissions.

Tony Richards4-May-09 7:01

Tony Richards

4-May-09 7:01

This can also come up if the file has already been opened somewhere else in your code and you've forgotten to close it.

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Dave Kreskowiak4-May-09 17:24

Dave Kreskowiak

4-May-09 17:24

If this is an ASP.NET application, the accout you're using to run this code under the debugger doesn't matter. It's actually running under the ASPNET account, which IIRC, by default, does not have Write permissions to the application folder. In order to make this work, and I do NOT recommend this, you have to give the ASPNET account Write permissions to the C:\inetpub\www\MapFile folder.

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Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

jon-804-May-09 19:20

jon-80

4-May-09 19:20

Yeah I thought so, but what is the ASP.net acct used? When checking the users on the OS there were none other than the Administrator and another one created by sql server.

This is not a production environment, so I'm not worried about security, but it's good to know.

Jon

Dave Kreskowiak5-May-09 3:51

Dave Kreskowiak

5-May-09 3:51

jon_80 wrote:
but what is the ASP.net acct used?

Depends on the server being used. If it's the development web server that comes with Visual Studio, it's "ASPNET". If it's IIS 6.0 and below, it'll probably be something like "IUSR_machineName". For IIS 7.0 and above, I think this name got changed to just "IUSR".

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

Member 41879984-May-09 20:00

Member 4187998

4-May-09 20:00

This method should work for you.

public static void AddFileSecurity(string FileName, string Account, FileSystemRights Rights, AccessControlType ControlType)
{
try
{

// Create a new FileInfo object.
FileInfo fInfo = new FileInfo(FileName);

// Get a FileSecurity object that represents the
// current security settings.
FileSecurity fSecurity = fInfo.GetAccessControl();

// Add the FileSystemAccessRule to the security settings.
fSecurity.AddAccessRule(new FileSystemAccessRule(Account,
Rights,
ControlType));

// Set the new access settings.
fInfo.SetAccessControl(fSecurity);

}

catch (Exception exp)
{

Console.WriteLine(exp.Message.ToString());
Console.Read();
}
}

You can use it with something like this:

FileWritePermission.AddFileSecurity(path, "everyone", System.Security.AccessControl.FileSystemRights.FullControl, System.Security.AccessControl.AccessControlType.Allow);

Cheers

Dave Kreskowiak5-May-09 3:55

Dave Kreskowiak

5-May-09 3:55

Cute code, but an account (and core running under that account) cannot grant more permissions to itself, nor anyone else, than it already has.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

ListView Picture

drcmomo4-May-09 5:11

drcmomo

4-May-09 5:11

Good morning everybody,
I would like to show stocked data in ListView to send DataTable aprés Select. DataTable contains a colonne of type Byte [] Array, I do not succeed show pictures in gate.somebody address can help me SVP?

Henry Minute4-May-09 6:25

Henry Minute

4-May-09 6:25

I think that I understand what you want to do. If I am right, this[^] link should help you.

If I am wrong, please edit your original post and try to explain you problem more clearly.

Henry Minute

Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”

drcmomo4-May-09 8:28

drcmomo

4-May-09 8:28

Good morning,
Excuse me, I am French, I speak the language badly Englishman. My question is the following:
I have one banks on look at foundation of data which contains columns Name, Forename, Photograph
I make a request SQL which is the following:

cmd.CommandText ="SELECT NAME, FIRSTNAME, PHOTO FROM USER";

I fill ListView in the following way:
sqlDa = new SqlDataAdapter();
sqlDa.SelectCommand = cmd;
try
{
sqlDa.Fill(dt_ListeUtilisateur);
if (dt_ListeUtilisateur.Rows.Count &gt; 0)
{

lstUtilisateur.DataContext = dt_ListeUtilisateur.DefaultView;

}} //lstUtilisateur = ListView
XAML :
<listview margin="7,10,15,48" name="lstUtilisateur" itemssource="{Binding}" borderbrush="{x:Null}" listboxitem.selected="lstUtilisateur_Selected" selectionchanged="lstUtilisateur_SelectionChanged">
<listview.view>
<gridview>
<gridviewcolumn header="NAME" displaymemberbinding="{Binding Path=NAME}" selector.isselected="True">
<gridviewcolumn header="FIRSTNAME" displaymemberbinding="{Binding Path=FIRSTNAME}">
<gridviewcolumn header="Picture" width="100" displaymemberbinding="{Binding Path=MyImage}">
<gridviewcolumn.celltemplate>
<datatemplate>

In the column Picture of my ListView, I have unfortunately not the photograph but Byte [] Array you can help me please.

drcmomo4-May-09 8:29

drcmomo

4-May-09 8:29

Good morning,
Excuse me, I am French, I speak the language badly Englishman. My question is the following:
I have one banks on look at foundation of data which contains columns Name, Forename, Photograph
I make a request SQL which is the following:

cmd.CommandText ="SELECT NAME, FIRSTNAME, PHOTO FROM USER";

I fill ListView in the following way:
sqlDa = new SqlDataAdapter();
sqlDa.SelectCommand = cmd;
try
{
sqlDa.Fill(dt_ListeUtilisateur);
if (dt_ListeUtilisateur.Rows.Count>0)
{

lstUtilisateur.DataContext = dt_ListeUtilisateur.DefaultView;

}} //lstUtilisateur = ListView
XAML :
<listview margin="7,10,15,48" name="lstUtilisateur" itemssource="{Binding}" borderbrush="{x:Null}" listboxitem.selected="lstUtilisateur_Selected" selectionchanged="lstUtilisateur_SelectionChanged">
<listview.view>
<gridview>
<gridviewcolumn header="NAME" displaymemberbinding="{Binding Path=NAME}" selector.isselected="True">
<gridviewcolumn header="FIRSTNAME" displaymemberbinding="{Binding Path=FIRSTNAME}">
<gridviewcolumn header="Picture" width="100" displaymemberbinding="{Binding Path=MyImage}">
<gridviewcolumn.celltemplate>
<datatemplate>

In the column Picture of my ListView, I have unfortunately not the photograph but Byte [] Array you can help me please.

Henry Minute4-May-09 8:46

Henry Minute

4-May-09 8:46

Your English is quite good. Part of what you are trying to do, is what I thought from your first post, so it must be reasonable. Smile | :)

I must admit that I didn't read all of the link I gave, but I thought that it dealt with reading and saving images to and from a database. If that is not where your problem is, then can I suggest that you post in the WPF forum here on CP, as your application would seem to be a WPF one.

If loading the photo is your problem, then perhaps you might like to Google for yourself. The search term I used was 'Loading Image from SQLServer C#', to see if there is anything more appropriate.

You seem to be slightly annoyed by my suggesting that you re-word your question. You shouldn't be, I often find that trying to ask something using different words makes me understand it a little better, myself.

Anyway, Good Luck! Smile | :)

(Bon chance ????)

convert uint to byte[]

Huisheng Chen4-May-09 4:54

Huisheng Chen

4-May-09 4:54

Hi all,

I have a byte[] to unit function, I would like to have a reverse function that convert unit to byte[], please help. thanks a lot.

public static uint ParseUint(byte[] buffer, int uintLengthInBytes, ref int offset)
{
    uint value = 0;
    int i, j;
    for (i = offset + uintLengthInBytes - 1, j = 0; i >= offset; i--, j++)
        value |= (uint)(buffer[i] << (8 * j));
    offset += uintLengthInBytes;
    return value;
}

Regards,
unruledboy_at_gmail_dot_com
http://www.xnlab.com

harold aptroot4-May-09 4:59

4-May-09 4:59

BitConverter.GetBytes

Huisheng Chen4-May-09 5:03

Huisheng Chen

4-May-09 5:03

hi, I know that method, the result is wrong. please take a closer look at the original code D'Oh! | :doh:

Regards,
unruledboy_at_gmail_dot_com
http://www.xnlab.com

harold aptroot4-May-09 5:10

4-May-09 5:10

What? Is it in Big Endian or something? Just Array.Reverse the result?

Huisheng Chen4-May-09 5:20

Huisheng Chen

4-May-09 5:20

sorry, my debugging mistake, you are right. thanks a lot. Rose | [Rose]

Regards,
unruledboy_at_gmail_dot_com
http://www.xnlab.com

harold aptroot4-May-09 5:31

4-May-09 5:31

You're welcome

Alan N4-May-09 5:21

Alan N

4-May-09 5:21

Byte order reversal?

Use System.BitConverter and System.Net.IPAddress.NetworkToHostOrder/HostToNetworkOrder.

One I did earlier:

/// <summary>
/// Byte reverse the value and write to the buffer at ofs
/// </summary>
/// <param name="i">value to write</param>
/// <param name="ofs">Write offset in the buffer</param>
internal void WriteUInt32(UInt32 i, Int32 ofs, Byte[] buffer) {
  Int32 j = IPAddress.HostToNetworkOrder(unchecked((Int32)i));
  Byte[] b = BitConverter.GetBytes(j);
  b.CopyTo(buffer, ofs);
}

Alan.

harold aptroot4-May-09 5:30