Re: Update a DataRow in a DataTable; - C# Discussion Boards

Re: Grab Value from text box

quiteSmart13-Dec-06 22:23

quiteSmart

13-Dec-06 22:23

send it back to main form through a public function or something like that

Re: Grab Value from text box

nmason14-Dec-06 5:09

nmason

14-Dec-06 5:09

It goes something like this..

public class EditBox : System.Windows.Forms.Form
{
private Button isOK;
public TextBox aField;

... code here for the EditBox

}

public class MainApp
{

string TextfromUser;

private DoSomething()
{

EditBox eb = new EditBox();
if (eb.ShowDialog() == DialogResult.OK)
{
TextfromUser = eb.aField.Text;
}

... do something with text from the user
}

}

Changing Form Layout

sajid.salim.khan13-Dec-06 20:24

sajid.salim.khan

13-Dec-06 20:24

Hi All,
the problem is that I want to change the border colour of the form. The strip on which the maximize, minimize and close button resides.

Plz Help Me

SAS

C++ delegate to C#...

Shy Agam13-Dec-06 20:20

Shy Agam

13-Dec-06 20:20

I have a solution with a managed C++ project, and a C# project which references the C++ project.
My C++ project contains the following:

struct AAA { ... };

typedef public enum BBB { ... };

public delegate void CallbackDelegate(AAA * a, BBB b);

class SomeClass
{
    ...
    static void RegisterCallback(CallbackDelegate^ callback);
    ...
}

My C# project is supposed to use RegisterCallback().
I can't use the CallbackDelegate in my C# project though, because it contains a pointer.
So I've declared the following in C# hoping that .NET would do the conversions for me Laugh | :laugh:

[StructLayout(LayoutKind.Sequential)]
public struct AAA { ... }

public enum BBB: int { ... }

public delegate void CallbackDelegate(AAA a, BBB b);

However, now I can't send my CallbackDelegate as a parameter to RegisterCallback() because it's not the same signature.

I'm new to all of this C++.NET s**t, so I don't really know how to use it in C#.
Could anyone point me in the right direction?

Thanks in advance,
Shy.

Re: C++ delegate to C#...

Eric Dahlvang14-Dec-06 4:47

Eric Dahlvang

14-Dec-06 4:47

shyagam wrote:
I can't use the CallbackDelegate in my C# project though, because it contains a pointer.

Couldn't you just create an unsafe delegate in C#?
See: unsafe (C# Reference) [^]

--EricDV Sig---------
Some problems are so complex that you have to be highly intelligent and well informed just to be undecided about them.
- Laurence J. Peters

Update a DataRow in a DataTable;

swjam13-Dec-06 20:07

swjam

13-Dec-06 20:07

Hi I just wanted to know the proper way of updating a DataRow.
If I have a DataTable say locDTable which already has rows populated through

Iterate<br />
{<br />
  DataRow locDRow = locDTable.NewRow();<br />
  //Put DataRow values here<br />
  locDTable.Rows.Add(locDRow);<br />
}

How do I access (and modify a particular column entry for a particular row?
The way I would do it something like:
locDTable.Rows[rowIndex][colIndex] = newValue;

Is this the proper way?

Thank you in advance!

j11Software

Re: Update a DataRow in a DataTable;

il_masacratore13-Dec-06 20:21

il_masacratore

13-Dec-06 20:21

Hi
Maybe, instead of access to the column by an index you can use strings constants to access to columns. It seems more elegant and if you change the structure of the table the acces to the previous column doesn't change.

To access to a particular row the only way is by an index.

Re: Update a DataRow in a DataTable;

SpartanSoft14-Dec-06 8:56

SpartanSoft

14-Dec-06 8:56

I agree 100% with the constants approach for column names, we do that all the time here and has paid of on numerous occasions. We also do it for the table names.

It decouples you from Database especially for column name changes (just change constant literal) as well as makes the code much more readable.

Christopher Pond
Innovative Technology Solutions
SpartanSoft.net.

file not found exception in asp.net project

justintimberlake13-Dec-06 19:52

justintimberlake

13-Dec-06 19:52

hi, every one i get this exception that i couldnot come up with a solution. reading severla forum i made sure that all dll file are copied but still i get the error. any help plz point out.
System.Web.HttpException: Exception of type System.Web.HttpException was
thrown. ---> System.IO.FileNotFoundException: ...get_aspx_ver.aspx

Re: file not found exception in asp.net project

althamda13-Dec-06 22:39

althamda

13-Dec-06 22:39

You might have copied the DLL's but it looks like you missed out that aspx file

Encrypion/Decryption

Osama12313-Dec-06 19:18

Osama123

13-Dec-06 19:18

Hi Members,

Plz tell me how to encrypt/decrypt a string in c sharp.net using cryptography namespace.

thanks n Regards ,
Ahmad
ahmad.osama1984@gmail.com

Re: Encrypion/Decryption

Nader Elshehabi13-Dec-06 19:41

Nader Elshehabi

13-Dec-06 19:41

You should use CryptoStream class. Click here[^].

Regards

Re: Encrypion/Decryption

Vasudevan Deepak Kumar13-Dec-06 19:43

Vasudevan Deepak Kumar

13-Dec-06 19:43

You can use XCrypt from http://www.codeproject.com/csharp/xcrypt.asp[^]

Vasudevan Deepak Kumar
Personal Homepage
Tech Gossips

Script library error in Majic Ajax on Windows XP

Yogesh Jamkhindikar13-Dec-06 18:07

Yogesh Jamkhindikar

13-Dec-06 18:07

Hi All,
Facing a peculiar problem.
I have MajicAjax implemented in my web page & the code runs perfect(My M/c's OS - Win 2000 Professional),whereas on the Tester's M/C it gives me script library '/AjaxCallObject.js' error on loading the same page(Tester's OS - Win XP). Furthermore, this problem persists only in some selective M/c's running on Win XP. Found some useful sites & tried the same but with no success.
Can anyone plz help asap...

Thanks in advance.
Yogesh J.

Re: Script library error in Majic Ajax on Windows XP

vijayan_53123-Feb-09 21:40

vijayan_531

23-Feb-09 21:40

multi select list box coding using mysql stored procedure

How to view available hard drives

MartyExodus13-Dec-06 18:05

MartyExodus

13-Dec-06 18:05

I'm writing a program in C# 2005 Express and one of its functions is to scan the hard drives of the computer for specific files.

However, due to the diversity of the machines this program will run on, I cannot guarantee the drive letters for each hard drive.

Is there any way I can find the available drives so I can limit and speed up my scan?

I know I could use HKLM>Software>Microsoft>Windows>CurrentVersion>Explorer>MountPoints2
to find what drives are there.... but that doesn't distinguish between drive types (Hard Drive, Floppy Drie, CD Drive).

And help would be greatly appreciated.

------------------------
using System.People;

Person me = new Person();

me.Certifications = null;
me.Experience = little;
me.WantsToLearn = true;
me.InSchool = true;

me.AskQuestions("C# .NET 2003");

Re: How to view available hard drives

«_Superman_»13-Dec-06 18:15

«_Superman_»

13-Dec-06 18:15

System.Environment.GetLogicalDrives()

« Superman »

Re: How to view available hard drives

MartyExodus13-Dec-06 18:18

MartyExodus

13-Dec-06 18:18

Ha.

Thanks.

I can use that with System.IO.DriveInfo to get what I need.

That's what I love about CodeProject... response within a half hour.

How could i send WindowApplcation.exe in Start up ?

Sanjib Raj13-Dec-06 17:42

Sanjib Raj

13-Dec-06 17:42

plz help me i have made Window Applcation and i want to save the exe in Startup. how it is possible

Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wli

Re: How could i send WindowApplcation.exe in Start up ?

Eytukan13-Dec-06 18:09

Eytukan

13-Dec-06 18:09

Sanjib Raj wrote:
Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wlinktech.com
Sanjit.rajbanshi@wli

sanjit, there are so many other ways to memorize your email id. This looks really awkward. Please remove them from your signature.

Sanjib Raj wrote:
plz help me i have made Window Applcation and i want to save the exe in Startup. how it is possible

The simple way is to create a shortcut to theStart Menu\Programs\Startup folder

:Gong: 歡迎光臨吐西批 :Gong:

Re: How could i send WindowApplcation.exe in Start up ?

Niiiissssshhhhhuuuuu13-Dec-06 18:49

Niiiissssshhhhhuuuuu

13-Dec-06 18:49

Hi,

If you want your programme in the start up than put the path in the registry for startup..

nishu

Inserting data based on multi select listbox data

mohd imran abdul aziz13-Dec-06 17:19

mohd imran abdul aziz

13-Dec-06 17:19

Dear all.
i am making web application using asp.net and C#(Visual studio 2005). i have listbox(with multi select option) on web form. I am able to capture data through loop. now i want to know how i can place this loop data into single statement for insert statement.i am using prepared statement that is my insert query is
"insert into agentmst(agentid,agentname,agentservice1,agentservice2,agentservice3,agentservice4,agentservice5,branchid,acreatedby,acreated,Ipadd) values(@aId,@aname,@serv1,@serv2,@serv3,@serv4,@serv5,@branchid,@crby,getdate(),@ip)";
(i am ristricted myselef to atmost five listbox option).now i am populating listbox option as
parm3.ParameterName = "@serv1";
parm3.Value = names[0];
parm4.ParameterName = "@serv2";
parm4.Value = names[1];
parm5.ParameterName = "@serv3";
parm5.Value = names[2];
parm6.ParameterName = "@serv4";
parm6.Value = names[3];
parm7.ParameterName = "@serv5";
parm7.Value = names[4];
now i am able to fetch listbox data correctly through loop as

for (int i = 0; i < listBox1.Items.Count; i++)
{
if (listBox1.Items[i].Selected == true)
{
for (int j = 1; j < 7; j++)
{
names[j] = listBox1.Items[i].Text;

Response.Write(names[j]);
break;
}
}
}

Now my question is how i can use this in insert statment. Please Guide me.
Where i am going wrong.
Any one knowing Please guide me.
Thanks

regards
imran khan

Re: Inserting data based on multi select listbox data

sno-113-Dec-06 18:14

sno-1

13-Dec-06 18:14

remember that the listbox in this powerfull lenguage c#, have many components that you can use in your project, for intance, only you need load the information in a datatable for example, and then tell to the listbox, and you can use too a combobox, the properties datasource that you load from a datatable:
public void LoadDatatable(ref system.data.datatable some)
{
cmd = new SqlCommand("yourStoredProcedureOrStatement",con);
cmd.CommandType = CommandType.StoredProcedure;

try
{
adapt = new SqlDataAdapter(cmd);
adapt.Fill(some);
}
catch(Exception ex){throw ex;}
finally
{
con.Close();
}
}

system.data.datatable p=new system.data.datatable();
LoadDatatable(ref p);

and after all this, only rest that you tell to the combobox or listbox, anyone that the properties DataSource = p;
and the way too show the thinks that was load:
ListBox.DataSource = p;
ListBox.DisplayMember = "The name of the thinks that you like show";
ListBox.ValueMember = "A id, if exist, only to give more handle to this control";

ok I hope that this thinks help you....
one think: Forgive me by my English ok, because in my contry this idioms i'snt speak a lot....

if you wanna another answer o whatever please write me Laugh | :laugh:

e-mail:joelintel@gmail.com

Re: Inserting data based on multi select listbox data

mohd imran abdul aziz13-Dec-06 18:59

mohd imran abdul aziz

13-Dec-06 18:59

Thanks for reply.
But i already filled the listbox in page load event. Now On Save Button, i have to get those selected item in the listbox. and add to the parameter.
My quetion is how can i assaign these selected option values to parameter used.

regards
imran khan

Re: Inserting data based on multi select listbox data

sno-114-Dec-06 5:41

sno-1

14-Dec-06 5:41

sorry for the long time, but I can'nt seat before my pc in some many hours, ok your question is simple

the best mode to give you the answer is with a example....
if you have a listbox and in them properties selection mode you put "MultiSimple", and you do a correct add of the elements to show in run time, you selected the item that you need to save in your DB maybe using that

int [] a;
int p=0;
p=this.listBox1 .SelectedIndices.Count ;
a=new int[p];
for (int i = 0;i < p;i++)
a[i] = this.listBox1 .SelectedIndices [i];

and in the array "a" you have all the position that be selected, the rest i think you know, make a loop wih that and with the class SqlParameter add all this position or the name of the item under this position....
is a plaesure help you, if you have any question tell me ok.... Laugh | :laugh:

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