C# Discussion Boards - CodeProject

5-Nov-05 0:14

hi all, can someone please help me to use this class in my application.

this is what i have so far.

<br />
[DllImport("Netapi32.dll")]<br />
    extern static int NetLocalGroupAddMembers(<br />
      [MarshalAs(UnmanagedType.LPWStr)] string servername,<br />
      [MarshalAs(UnmanagedType.LPWStr)] string groupname,<br />
      int level,<br />
      ref LOCALGROUP_MEMBERS_INFO_3[] buf,<br />
      int totalentries<br />
    );<br />
<br />
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]<br />
    public struct LOCALGROUP_MEMBERS_INFO_3<br />
    {<br />
      public string domainandname;<br />
    }<br />
<br />
private enum NERR_GROUP_MEMBER_ADD<br />
    {<br />
      NERR_Success = 0,<br />
<br />
      // The local group specified by the groupname parameter does not exist.  <br />
      NERR_GroupNotFound = 1,<br />
<br />
      // The user does not have access to the requested information.    <br />
      ERROR_ACCESS_DENIED = 2,<br />
<br />
      // One or more of the members specified <br />
      // do not exist. Therefore, no new members were added.<br />
      ERROR_NO_SUCH_MEMBER = 3,<br />
<br />
      // One or more of the members specified were already <br />
      // members of the local group. No new members were added.<br />
      ERROR_MEMBER_IN_ALIAS = 4,<br />
<br />
      // One or more of the members cannot be added because their <br />
      // account type is invalid. No new members were added.<br />
      ERROR_INVALID_MEMBER = 5<br />
    }<br />

then i call it with this

<br />
public bool NetLocalGroupAddMember(string groupname, string username)<br />
    {      <br />
      LOCALGROUP_MEMBERS_INFO_3 member = new LOCALGROUP_MEMBERS_INFO_3();<br />
      member.domainandname = Environment.UserDomainName + @"\" + username;<br />
<br />
      LOCALGROUP_MEMBERS_INFO_3[] members = new LOCALGROUP_MEMBERS_INFO_3[] { member };<br />
      <br />
      int retVal = NetLocalGroupAddMembers(SERVER_NAME, UserManager.DEFAULT_GROUPNAME, 3, ref members, 1);<br />
<br />
      if (retVal != (int)NERR_GROUP_MEMBER_ADD.NERR_Success)<br />
      {<br />
        MessageBox.Show("Error Adding Member to Group",<br />
         "Error",<br />
         MessageBoxButtons.OK,<br />
         MessageBoxIcon.Error);<br />
         return false;<br />
      }<br />
      return true;<br />
    }<br />

this returns the messagebox, and the retVal is 1387

this is the interface

<br />
NET_API_STATUS NetLocalGroupAddMembers(<br />
  LPCWSTR servername,<br />
  LPCWSTR groupname,<br />
  DWORD level,<br />
  LPBYTE buf,<br />
  DWORD totalentries<br />
);<br />

i was unsure about the LPBYTE buf, whether it should be an IntPtr or not, if so, i cannot figure out the syntax.

can someone please help with this.

kind regards,
g00fy

S. Senthil Kumar5-Nov-05 2:02

S. Senthil Kumar

5-Nov-05 2:02

Did you try using this[^] P/Invoke signature?

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

g00fyman5-Nov-05 2:12

5-Nov-05 2:12

yes i have.

the MS API says that the buf is '... The buf parameter points to an array of LOCALGROUP_MEMBERS_INFO_3 structures. ...'

thats why i tried the LOCALGROUP_MEMBERS_INFO_3[] in the signature

i think the problem is that the buf should be an IntPtr and not what is in that signature, but i need someone to clarify this. if it is suppose to be an IntPtr then how do i allocate the size of the LOCALGROUP_MEMBERS_INFO_3 as byte[] in mem ?

this is what i have now

<br />
[DllImport("Netapi32.dll")]<br />
    extern static int NetLocalGroupAddMembers(<br />
      [MarshalAs(UnmanagedType.LPWStr)] string servername,<br />
      [MarshalAs(UnmanagedType.LPWStr)] string groupname,<br />
      int level,<br />
      ref /*IntPtr*/ LOCALGROUP_MEMBERS_INFO_3 buf,<br />
      int totalentries<br />
    );<br />
<br />
public bool NetLocalGroupAddMember(string groupname, string username)<br />
    {      <br />
      LOCALGROUP_MEMBERS_INFO_3 member = new LOCALGROUP_MEMBERS_INFO_3();<br />
      member.domainandname = Environment.UserDomainName + @"\" + username;<br />
<br />
      //LOCALGROUP_MEMBERS_INFO_3[] members = new LOCALGROUP_MEMBERS_INFO_3[] { member };<br />
<br />
      //IntPtr bufPtr = Marshal.AllocHGlobal(2048); // how do i do this ???<br />
      //Marshal.StructureToPtr(members, bufPtr, true); // how do i do this line also ???<br />
<br />
      int retVal = NetLocalGroupAddMembers(SERVER_NAME, LocalUserManager.DEFAULT_GROUPNAME, 3, ref /*bufPtr*/ member, 1);<br />
<br />
      if (retVal != (int)NERR_GROUP_MEMBER_ADD.NERR_Success)<br />
      {<br />
        MessageBox.Show("Error Adding Member to Group",<br />
         "Error",<br />
         MessageBoxButtons.OK,<br />
         MessageBoxIcon.Error);<br />
         return false;<br />
      }<br />
      return true;<br />
    }<br />

kind regards,
g00fy

S. Senthil Kumar5-Nov-05 3:26

S. Senthil Kumar

5-Nov-05 3:26

I've run out of ideas. I looked up 1387 and the description says ERROR_NO_SUCH_MEMBER (One or more of the members specified do not exist. Therefore, no new members were added.). You sure your parameters are logically correct?

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

g00fyman5-Nov-05 11:33

5-Nov-05 11:33

i am sure that my input is correct.

where did you look this constant up at ?

i googled for it and got nothing Frown | :(

kind regards,
g00fy

g00fyman5-Nov-05 12:05

5-Nov-05 12:05

ok i found this list on msdn

but it doesnt have the 1380 err code, do you have a link to that resource please ?

i got it going to by the way, thank you for your help.

this is what i ended up with, im sure i had this at some point, maybe i was lacking sleep or something

<br />
public bool NetLocalGroupAddMember(string groupname, string domain, string username)<br />
    {      <br />
      LOCALGROUP_MEMBERS_INFO_3 member = new LOCALGROUP_MEMBERS_INFO_3();<br />
      member.domainandname = domain + @"\" + username;<br />
<br />
      int retVal = NetLocalGroupAddMembers(SERVER_NAME, LocalUserManager.DEFAULT_GROUPNAME, 3, ref member, 1);<br />
<br />
      if (retVal != (int)NERR_GROUP_MEMBER_ADD.NERR_Success)<br />
      {<br />
        MessageBox.Show("Error Adding Member to Group: " + retVal,<br />
         "Error",<br />
         MessageBoxButtons.OK,<br />
         MessageBoxIcon.Error);<br />
        return false;<br />
      }<br />
      return true;<br />
    }<br />

kind regards,
g00fy

Re: Train free @Microsoft

S. Senthil Kumar6-Nov-05 19:02

S. Senthil Kumar

6-Nov-05 19:02

I pasted the constant and hit "Go to Definition" in Visual Studio Smile | :)

It's in winerror.h, in case you want to look it up.

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

Train free @Microsoft

vikas amin4-Nov-05 22:50

vikas amin

4-Nov-05 22:50

Got to this link and register free for
training your self for VS2005
https://www.microsoftelearning.com/visualstudio2005/
or
http://www.financialexpress.com/latest_full_story.php?content_id=107645

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Cool | :cool:

Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com

Glaxalg7-Nov-05 6:19

Glaxalg

7-Nov-05 6:19

Funny, but I can't get ANY of these FREE courses. Every time error is returned:
"We’re sorry, but we were unable to service your request". Something tells me that it will happen until Nuvember 17'th when the free period will be over. Smile | :)

Train free @Microsoft

vikas amin4-Nov-05 22:50

vikas amin

4-Nov-05 22:50

Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com

Create Array In Method Paremeters

budidharma4-Nov-05 19:54

budidharma

4-Nov-05 19:54

I've written classes for cards, hands, and decks. The hand constructor takes an array of cards as it's paremeter, like so:

public Hand(Card[] Cards)
{
... perform actions
}

But here's the thing. When I create a new hand, I'm current doing this:
Card[] cards = { deck.TopCard, deck.TopCard, deck.TopCard };
Hand hand1 = new Hand(cards);

Rather, I should be doing something like the following, only I can't figure out the correct syntax:

Hand hand1 = new Hand( { deck.TopCard, deck.TopCard, deck.TopCard } );

... Obviously, that throws an error, but I'm pretty sure you see what I want to do. I want to implicitly create the card array in the constructor paremeter. Is this possible?

Re: Create Array In Method Paremeters

leppie4-Nov-05 20:52

leppie

4-Nov-05 20:52

you need to do new Card[] {... }

or use the params attribute. Look on MSDN for this info.

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Re: Create Array In Method Paremeters

Jon Rista8-Nov-05 7:06

Jon Rista

8-Nov-05 7:06

Hand hand1 = new Hand(new Card[] { deck.TopCard, deck.TopCard, deck.TopCard });

Reading XML attribute and write into datagrid

dunbshy4-Nov-05 14:47

dunbshy

4-Nov-05 14:47

i have a xml looks like this:
(?xml version="1.0" encoding="utf-8" ?)
(EventLog)
(Log Date="11/1/2005")
(Event) 10:37:42 AM : System is Successfully Loaded
(Event) 10:45:04 AM : System is Successfully Loaded
(/Log)
(Log Date="11/2/2005")
(Event) 8:39:32 PM : System is Successfully Loaded
(Event) 8:40:18 PM : System is Successfully Loaded
(/Log)
(/EventLog)

and i have a method which displays those xml data into the datagrid:

XmlDocument docXML = new XmlDocument();
docXML.Load("EventLog.xml");
DataSet dsEvent = new DataSet("Log");

dsEvent.ReadXml("../Debug/EventLog.xml");
dataGrid1.DataSource = dsEvent;
dataGrid1.DataMember = "Log";
dataGrid1.CaptionText = "NetWatcher Event Log";

It displays all the members for "Log" elements.. My problem is.. how to display the members of "Log" for particular date only?( particular "Log"'s attribute)

I've tried something like dataGrid1.DataMember = "Log Date="+@""11/2/05"" and it gives error like datamember Log Date = "11/2/05" was not found.

-- modified at 20:48 Friday 4th November, 2005

Jon Rista4-Nov-05 16:04

Jon Rista

4-Nov-05 16:04

You can filter and sort using a DataView object. Pull the table you want to display out of the DataSet, then create a DataView for it. Set your filter, and then use the DataVeiw object as your .DataSource, rather than the DataSet itself.

dunbshy5-Nov-05 3:32

dunbshy

5-Nov-05 3:32

I've tried this but it's still not executable.

DataSet dsEvent = new DataSet("Log");
dsEvent.ReadXml("../Debug/EventLog.xml");
DataView dv = new DataView(dsEvent.Tables["Log"] ,DateToday,"",DataViewRowState.CurrentRows);

dataGrid1.DataSource = dv;
dataGrid1.DataMember = "Log";
dataGrid1.CaptionText = "NetWatcher Event Log";

Note:variable DateToday is the attribute that i want to filter. I provide the node name and attribute and I want to get their childnode

-- modified at 9:45 Saturday 5th November, 2005

Jon Rista5-Nov-05 9:55

Jon Rista

5-Nov-05 9:55

Alright. Let me break it down, to make sure I understand everything. First thing, DateToday is a string variable that you populate elsewhere, correct? I am assuming that your allowing the user to change the date through the UI somewhere?

There are two things that I'm wondering about. First is, are you sure the table in the DataSet that you want to display is called "Log"? Second, are you calling .DataBind() on the DataGrid? If the code was broken down a bit into more granular pieces, say something like this:

<br />
DataSet dsEvent = new DataSet("Log");<br />
dsEvent.ReadXml("../Debug/EventLog.xml");<br />
<br />
// This next line assumes that the xml file EventLog.xml <br />
// creates a table in the DataSet named "Log". NOTE that<br />
// the name of the dataset and the name of the table are<br />
// NOT neccesarily the same. A DataSet contains tables, <br />
// but it is not a table itself. The default table name <br />
// is usually "Table1" if a table name is not found anywhere<br />
// e, then table names are in sequence<br />
// after that.<br />
DataView dv = new DataView(dsEvent.Tables["Log"]);<br />
dv.RowFilter = "TheDate='11/1/2005'"; // Is this what your DateToday string looks like?<br />
dv.RowStateFilter = DataViewRowState.CurrentRows;<br />
<br />
// If a sort was desired, set dv.Sort here<br />
<br />
dataGrid1.CaptionText = "NetWatcher Event Log";<br />
<br />
dataGrid1.DataSource = dv;<br />
// The following line is not needed when using a DataView, only when using a DataSet<br />
// dataGrid1.DataMember = "Log";<br />
dataGrid1.DataBind(); // You MUST call this to populate the grid<br />

Does any of that help? Make sure you know what the table in your DataSet is called. The DataSet is called "Log", but is the table really called "Log", or is it something else? And at the end of it all, make sure you call .DataBind() on your datagrid.