DataViewGrid and dates - C# Discussion Boards

Re: have a textbox go through every permutation

crash8939-Mar-07 17:54

crash893

9-Mar-07 17:54

could you explain a little more?

Re: have a textbox go through every permutation

CPallini13-Mar-07 9:07

CPallini

13-Mar-07 9:07

It's not difficult but you have to formulate the question in a more accurate way, i.e. I think that the sequence you gave it's not correct (or I cannot guess correctly what do you want to do...)
I mean, you include

aa
ab
ac

but not

bb
bc

and

cc

that, I think, are legal sequences.
Moreover, do you consider

ba

and

ab

the same sequence or not?

Finally, I repeat, be more accurate in your request (or explain me what i cannot understand...)

Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

Re: have a textbox go through every permutation

crash89313-Mar-07 13:21

crash893

13-Mar-07 13:21

you are correct sorry it slipped my mind when i was giving the example

a
b
c
aa
ab
ac
ba
bb
bc
ca
cb
cc
aaa
aab
aac
aba

and so on

If it were numbers it would just be X=x+1 but in strings i cant figure it out.

Re: have a textbox go through every permutation

CPallini15-Mar-07 11:41

CPallini

15-Mar-07 11:41

in fact, more difficult (at least to me) then I expected. But finally (with a bit use of recursion):

public static void Main(string[] args)
{
  perms("abc");
  Console.Read();
}
public static void perms(string s)
{
  for (int iDigits=1; iDigits<=s.Length;iDigits++)
  {
    recurse(s, "", iDigits, 0);
  }
}
public static void  recurse(string sOrig, string sCur, int iDigits, int iLevel)
{
  iLevel++;
  for (int i=0; i<sOrig.Length;i++)
  {
    string sNew =sCur+sOrig[i];
    if (iLevel == iDigits)
    {
      Console.WriteLine(sNew);
    }
    else
    {
      recurse(sOrig,sNew, iDigits, iLevel);
    }					
  }
  iLevel--;
}

Hope that helps.

P.S. I made a try with perms("abcde") and it runs (the correctness check is up to you...) Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

Re: have a textbox go through every permutation

crash89315-Mar-07 16:49

crash893

15-Mar-07 16:49

Thanks so much for your help

im still strugling to grasp the code

I'm having trouble getting it to run

the "for (int i=0; i"

line is giving errors

usually it would be for (int I=0: i<10;i++) or something like that but I'm not sure exactly what its supposed to be

i will start playing with it in the hopes i can get it working but if you wouldn't mind letting me know what its supposed to be i would be interested to see if i got it right

and again thanks for your help

Sorry, was a misunderstanding between ME & HTML

CPallini15-Mar-07 23:20

CPallini

15-Mar-07 23:20

Last night was a bit late. The fixed line follows:

for (int i=0; i<sOrig.Length; i++)

Let me know if there are further troubles.

Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

Re: Sorry, was a misunderstanding between ME & HTML

crash89318-Mar-07 6:55

crash893

18-Mar-07 6:55

nope that workes perfectly

thanks for your help

DataViewGrid and dates

crzyank8-Mar-07 9:51

crzyank

8-Mar-07 9:51

Hi,

I have DataGridView in my application connecting to Oracle DB. Oracle table has a date as '03/12/2007' and same is returned to the front end via DataSet. However when this dataset is bound to the grid, the date displayed is '03/11/2007'!!! Similarly all the dates that have two (2) digit days (from 10 to 31) are reduced by a digit! e.g. instead of '03/30/2007' it shows '03/29/2007'. If I do not use any formatting for the .DefaultCellStyle property then the date displayed is '03/11/2007 11:00 PM'. Dates with single digit days i.e. '03/08/2007' stays the same though - with or without formatting. Please note that my SQL statement truncates the date to short date format - TRUNC(pay_date) - already.

Any help is really appreciated.

Thanks.

crzYank

Re: DataViewGrid and dates

Frank Kerrigan8-Mar-07 11:41

Frank Kerrigan

8-Mar-07 11:41

You could try and just use text straight from Oracle and use it as string. If you are using a strong typeing thi might not be possible.

Grady Booch: I told Google to their face...what you need is some serious adult supervision. (2007 Turing lecture)

http:\\www.frankkerrigan.com

Re: DataViewGrid and dates

crzyank9-Mar-07 2:10

crzyank

9-Mar-07 2:10

That should work. I'll try that.

Thanks!

crzYank

Re: DataViewGrid and dates

crzyank9-Mar-07 2:15

crzyank

9-Mar-07 2:15

and it worked...........

crzYank

Settings Regional And Language Settings Programaticaly

Aztekman8-Mar-07 9:16

Aztekman

8-Mar-07 9:16

I have a need to change the Regional And Language Settings/Locale through my C# Application. To further Complicate the matter, it will need to be done using Win CE 5.0 operating system. I have Visual Studio 2005.
Anyone have any suggestions?

Thanks

Re: Settings Regional And Language Settings Programaticaly

Frank Kerrigan8-Mar-07 11:49

Frank Kerrigan

8-Mar-07 11:49

Have a look at the "culture" setting via code

This is for compact framework 1 but should still good

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=718942&SiteID=1[^]

Grady Booch: I told Google to their face...what you need is some serious adult supervision. (2007 Turing lecture)

http:\\www.frankkerrigan.com

Re: Settings Regional And Language Settings Programaticaly

Aztekman9-Mar-07 3:56

Aztekman

9-Mar-07 3:56

Thanks for the response. I am doing this project with the Compact framework.
I am not sure how this will help me set the Control Panel -> Regional Settings for different Languages->Cultures using C#/C++.
I Would also be ok with finding a DLL that I could connect to, to use some method within that would help me set the regional values.

IP to hostname

marwan_siala8-Mar-07 8:00

marwan_siala

8-Mar-07 8:00

i have an IP and i want to change it to host name
how is that??

thanks allot

Re: IP to hostname

pbraun8-Mar-07 8:31

pbraun

8-Mar-07 8:31

In your help look up Dns.GetHostEntry().

Phil

Re: IP to hostname

marwan_siala8-Mar-07 22:58

marwan_siala

8-Mar-07 22:58

GetHostEntry Resolves a host name or IP address to an IPHostEntry instance.
but i have an IP as a string and i need to resolve it to host name as a string too.

thanks allot

Re: IP to hostname

\laddie8-Mar-07 23:28

\laddie

8-Mar-07 23:28

Dns.GetHostByAddress("127.0.0.1").HostName

Hope this help.

Neo

Re: IP to hostname

marwan_siala8-Mar-07 23:35

marwan_siala

8-Mar-07 23:35

thanks allot. it works

best regards.

Null reference exception

error14088-Mar-07 7:48

error1408

8-Mar-07 7:48

Hi,
when i run this code i get a null-reference exception at the last line of code. I don't know why this happens, because i first add the node and it IS there. I looked in the debugger.
Does someone know a solution?
<code>
foreach (DateTime d in daten)
{
if (treeView1.Nodes.Find(d.Month.ToString(), false) != null)
{
treeView1.Nodes.Add(new TreeNode(d.Month.ToString()));
}
treeView1.Nodes[d.Month.ToString()].Nodes.Add(new TreeNode(d.Date.ToShortDateString()));
}
</code>

Re: Null reference exception

Edmundisme8-Mar-07 8:32

Edmundisme

8-Mar-07 8:32

It will be easier to see what's going on if you break out that last line of code as follows:

TreeNode node = treeView1.Nodes[d.Month.ToString()];
TreeNode newNode = new TreeNode(d.Date.ToShortDateString());
node.Nodes.Add(newNode);

This will allow you to check state as you step though in debug mode. When you put so much into a single line, it can be much less obvious what is breaking.

Re: Null reference exception

Ennis Ray Lynch, Jr.8-Mar-07 8:56

Ennis Ray Lynch, Jr.

8-Mar-07 8:56

if d is null from daten then d.Month will fail;

Also, treeView1.Notes[someString] may return null as well but it is most likely the d;

File Not Found

Re: Null reference exception

Guffa8-Mar-07 11:37

Guffa

8-Mar-07 11:37

Ennis Ray Lynch, Jr. wrote:
but it is most likely the d

Not so very likely... The variable d is a DateTime structure, and can't be null.

---
single minded; short sighted; long gone;

Actually

Ennis Ray Lynch, Jr.8-Mar-07 12:56

Ennis Ray Lynch, Jr.

8-Mar-07 12:56

Since daten is not defined in could very well be a non-generic 1.1 .NET collection such as an array list which are collections of objects. Iterating on such a structure would attempt to assign null giving the null reference exception. Below is written in 2.0 but uses the 1.1 collection ArrayList.

<br />
ArrayList list = new ArrayList();<br />
list.Add(DateTime.Now);<br />
list.Add(null);<br />
foreach(DateTime d in list) {<br />
    MessageBox.Show(d.ToShortDateString());<br />
}<br />

File Not Found

Re: Actually not

Guffa9-Mar-07 3:51

Guffa

9-Mar-07 3:51

No, it couldn't. If the daten collection would contain something other than DateTime values, the error would appear when the value is put in the d variable, not when the d variable is later used.

---
single minded; short sighted; long gone;

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