C# Discussion Boards - CodeProject

Re: Windows Form

Polis Pilavas12-Dec-05 4:47

Polis Pilavas

12-Dec-05 4:47

Try hiding your "parent" form instead and re-show it when you're done with the "child" (frmGUI) one:

SecurityGUI.frmGUI frm = new frmGUI();
this.Hide();
frm.ShowDialog();
this.Show();

This will work fine since after closing the child form, the applications' control will return to the line that immediately follows the ShowDialog() method.

Regards,
Polis

Can you practice what you teach?

Re: Windows Form

faisal khanani12-Dec-05 18:14

faisal khanani

12-Dec-05 18:14

thanks Poils,

It works fine.

load a .gif image at runtime in crystal report

dhol12-Dec-05 2:01

dhol

12-Dec-05 2:01

Hi

I have done a program in C# such that , added a crystal report viewer, then added a button named as browse… and designed a report by getting source from the xml schema file(.xsd file) with two fields namely name,image..... name is of string datatype and image is of
datatype base64Binary.. so now when I run the program.. using browse button I can be able to load a .jpg image at runtime.. so that image will be displayed in the report…. This is wht my program does…

Now what I have to do is that ,I should be able to load a .gif image at runtime and display in crystal report.At present when I select a .gif image..its not shown in crystal report…so please help me to do this.. I will enclose my coding part along with this..please have a look at it and help me to do this program….

and the coding is as follows:

// Prcocedure: AddImageRow
// reads an image file and adds this image to a dataset table
//
void AddImageRow(DataTable tbl, string name, string filename)
{
FileStream fs = new FileStream(filename, FileMode.Open); // create a file stream
BinaryReader br = new BinaryReader(fs); // create binary reader
DataRow row;

// create a new datarow
row = tbl.NewRow();

// set country field and image field
row[0] = name;
row[1] = br.ReadBytes((int)br.BaseStream.Length);

// add this row to the table
tbl.Rows.Add(row);

// clean up
br = null;
fs = null;
}

//Browse button
private void button1_Click(object sender, System.EventArgs e)
{
OpenFileDialog openFileDialog1 = new OpenFileDialog();
// openFileDialog1.Filter = "Image Files(*.jpg) | *.jpg ";
openFileDialog1.Filter = "Image Files(*.jpg) |*.jpg | All Files(*.*) | *.*";
openFileDialog1.ShowDialog(this);
//the variable myPic contains the string of the full File Name,it includes the full path.
string mypic = openFileDialog1.FileName;

DataSet data = new DataSet();

// add a table 'Images' to the dataset
data.Tables.Add("Images");

// add two fields
data.Tables[0].Columns.Add("Country", System.Type.GetType("System.String"));
data.Tables[0].Columns.Add("img", System.Type.GetType("System.Byte[]"));

AddImageRow(data.Tables[0],mypic,mypic);

// create a report
showimage cr = new showimage();
cr.SetDataSource(data);
// pass a reportdocument to the viewer
crystalReportViewer1.ReportSource = cr;

}

Read .dif file format + store in dataser

Darshan Gandhi12-Dec-05 1:36

Darshan Gandhi

12-Dec-05 1:36

how can i read .dif file in asp.net using c#

darshan gandhi

Re: Read .dif file format + store in dataser

Dave Kreskowiak12-Dec-05 6:21

Dave Kreskowiak

12-Dec-05 6:21

Not enough information. There are currently 9 known uses for ".DIF" files in the FileExt database, here[^].

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Implement CheckBoxes in Listbox?

MudkiSekhon12-Dec-05 1:27

MudkiSekhon

12-Dec-05 1:27

Hi friends,
Plz suggest me how can i implement checkboxes in listbox in Windows forms application. I want to use checkboxes to select items from the listbox. If possible, plz send me the code.....

Thanks,
Sandeep
+919891027854

Re: Implement CheckBoxes in Listbox?

Polis Pilavas12-Dec-05 2:29

Polis Pilavas

12-Dec-05 2:29

Look for a Windows forms' control called CheckedListBox in your toolbox instead

Regards,
Polis

Can you practice what you teach?

Re: Implement CheckBoxes in Listbox?

MudkiSekhon12-Dec-05 2:40

MudkiSekhon

12-Dec-05 2:40

Thanks for ur reply. Have u any sample code in which u catch the checkboxes that are selected from the CheckedListBox?
I want to select multiple values from tha CheckedListBox....

Regards,
Sandeep
+919891027854

Re: Implement CheckBoxes in Listbox?

Polis Pilavas12-Dec-05 4:41

Polis Pilavas

12-Dec-05 4:41

Yes, take a look below at the following self-explanatory code chunk. First I add three items into the checkedListBox, and then I get the text of the selected ones by looping through each one of them:

string <code>checkedItems </code>= "";

// Add a few items into the checkedListBox control
this.checkedListBox1.Items.Add("Item 1", CheckState.Checked);
this.checkedListBox1.Items.Add("Item 2", CheckState.Indeterminate);
this.checkedListBox1.Items.Add("Item 3", CheckState.Unchecked);

// Retrieve the selected items in a string
for (int i = 0; i < this.checkedListBox1.Items.Count; i++)
{
	if (this.checkedListBox1.GetItemChecked(i))
		<code>checkedItems </code>+= this.checkedListBox1.Items[i].ToString() + "\n";
}

MessageBox.Show(<code>checkedItems</code>);

Regards,
Polis

Can you practice what you teach?

Retreiving and displaying strings...in Treeview

Mahi.Ragava11-Dec-05 23:17

Mahi.Ragava

11-Dec-05 23:17

Thanx senthil...It works...

If the same have to be done in treeview,i can add the firstline strings of the file as Nodes,
From the Nextline ,each element belongs a column..
That is...
"Tic","Tac","Toe"
"1","2","3"
"4","5","6"

Here...Tic ,Tac,and Toe are 3 sep columns and "1","4" belongs to Tic.."2","5" belongs to Tac and "3","6" belongs to Toe...
How to add those as "1","4"etc...as childnodes of "Tic"....

Am in urgent search for this kind of display...Kindly help me...

Logout code..

momoo11-Dec-05 22:30

momoo

11-Dec-05 22:30

Hi, everyone.. I just started learning C# web application not long ago.. I like to enquire that if the user wants to logout of the web page/site, what is the code for the logout command when i click on the logout button?? Sorry as my question is too simple for you guys.. But thanks for the help.. Wink | ;)

Thanks

Re: Logout code..

Dave Kreskowiak12-Dec-05 6:18

Dave Kreskowiak

12-Dec-05 6:18

That all depends on what your using to handle logins. There is no one way of authenticating, tracking, and giving roles to users of your site. How you do the logout depends ENTIRELY on how you designed your authentication package, how your tracking your user sessions, what you need to do when the user logs out, or the session times out.

Without a LOT more detail about your security system, it's impossible for anyone to tell you how to code your logout. That is, other than dropping a button on a form and handling it's click event.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Dll Reflector

AB777111-Dec-05 22:22

AB7771

11-Dec-05 22:22

Hi all,

As we all know that the Reflector can be used to show the code written by us in the dll provided by us.

I want to know some way which should block this.
i.d if a dll is given the code should not be displayed

Any links or pointers if known to anyone are most welcome

Thanks and Regards,

Pramod

Re: Dll Reflector

S. Senthil Kumar11-Dec-05 23:06

S. Senthil Kumar

11-Dec-05 23:06

You are looking for .NET Obfuscators[^].

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

Re: Dll Reflector

AB777111-Dec-05 23:19

AB7771

11-Dec-05 23:19

Hi,

can you elaborate more
i did not get you
actually i have seen that the dll's code can be viewed using a reflector
and i dont want that to happen with my dlls

Thanks and Regards,
Pramod

Re: Dll Reflector

S. Senthil Kumar11-Dec-05 23:25

S. Senthil Kumar

11-Dec-05 23:25

Did you click on the link I posted? Obfuscation is a technique that is aimed at preventing disassembly, which is what you're looking at.

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

Re: Dll Reflector

Jared Parsons12-Dec-05 4:49

Jared Parsons

12-Dec-05 4:49

S. Senthil Kumar wrote:
Obfuscation is a technique that is aimed at preventing disassembly,

It doesn't really prevent disassembly. Rather it helps preventy someone from garning anything useful from the disassembly by obfuscating the code the point that it is no longer easily readable.

Jared Parsons
jaredp@beanseed.org
http://spaces.msn.com/members/jaredp/

Re: Dll Reflector

Dave Kreskowiak12-Dec-05 6:14

Dave Kreskowiak

12-Dec-05 6:14

What you want is not possible. The best you can hope for is to obfuscate the code and hope that the little bastard trying to disassemble it, doesn't have the time to dig your code out of the garbage that the obfuscator creates.

Even if you managed to compile the managed code down to native code, your code can still be disassembled, though it just takes more time to do it.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Re: Dll Reflector

S. Senthil Kumar12-Dec-05 15:44

S. Senthil Kumar

12-Dec-05 15:44

I've seen some obfuscators that crash the disassembler, but yes, you're right, the purpose is to make it almost unreadable.

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

Retreiving and displaying strings...

Mahi.Ragava11-Dec-05 22:20

Mahi.Ragava

11-Dec-05 22:20

hi friends,

Am having a paragraph which is like....

"Tic","Tac","Toe"
"1","2","3"
"12,"16","11"

Here the first line strings Tic,Tac and Toe are fields...

I have to retreive each of them seperately such that they have to be displayed in a multiline textbox as,
Tic
Tac
Toe....

How can i do it?Kindly help me...

Thanx

-- modified at 4:22 Monday 12th December, 2005

Re: Retreiving and displaying strings...

occcy11-Dec-05 22:27

occcy

11-Dec-05 22:27

i don't know whether i understand your question right...?!
but if your string is "\"Tic\",\"Tac\","\Toe\"" you could use the Split method.

<br />
string s="\"Tic\",\"Tac\","\Toe\"";<br />
string[] fields=s.Split(new char[]{','});<br />

Re: Retreiving and displaying strings...

Mahi.Ragava11-Dec-05 22:35

Mahi.Ragava

11-Dec-05 22:35

Hi friend,

The same way i hav splitted...But i want to display those splitted strings line by line in a Multiline Textbox..

Like,(in a TextBox)

Tic
Tac
Toe

Thanx

Re: Retreiving and displaying strings...

S. Senthil Kumar11-Dec-05 23:07

S. Senthil Kumar

11-Dec-05 23:07

If you've got the split strings, then just use the AppendText method to add them to the textbox. Rember to append System.Environment.NewLine to every split string, like

multiLineTextBox.AppendText(splitString[i] + Environment.NewLine);

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

How to Program for Dallas Semi conductor IButton

vhkg11-Dec-05 22:11

vhkg

11-Dec-05 22:11

I had a requirement to use IButton during login process in to my C# Winforms Application can any one help me out how to program for IButton in C#

Krishna

Re: How to Program for Dallas Semi conductor IButton

Tim Paaschen11-Dec-05 22:31

Tim Paaschen

11-Dec-05 22:31

Have a look at http://www.maxim-ic.com/products/ibutton/.
There you can find a SDK and all kind of documentation.

Tim

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