C# Discussion Boards - CodeProject

Judah Gabriel Himango3-Feb-04 6:08

3-Feb-04 6:08

The executable size will be about the same. Yes, end users need the .NET framework redistributable, 21MB. Many people running XP will already have it as it's included in Windows Update, and Microsoft will be including it in most of their future operating systems, including Longhorn.

The graveyards are filled with indispensible men.

Re: Net framework needed??

Anonymous3-Feb-04 6:43

Anonymous

3-Feb-04 6:43

Thanks Judah for that, do you know if Win 2003 server includes this framework and is installed by default?

Would I be correct in saying that if you get a web browser application with all the code held on the server then you only need the framework install on the server or would your clients also need this?

Re: Net framework needed??

Heath Stewart3-Feb-04 8:55

Heath Stewart

3-Feb-04 8:55

Windows Server 2003 comes with .NET 1.1 installed. For most smaller applications, the Framework is forward compatible (larger applications have a higher chance of using obsolete functionality). So, if you built an application for .NET 1.0, there's a chance that it'll run on .NET 1.1.

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How to draw X and Y axis?

Member 18556083-Feb-04 3:06

Member 1855608

3-Feb-04 3:06

I want to draw a X axis,the X and Y data are such as following:
20000101,5.9
20000102,7.5
...........
...........
...........
20031201,5.8

The first row is year-month-day format,the second is the Y data.
Now my problem is how to draw the X axis using the first row.
it will be nice to you to give me a answer,or to give me a smilar sample.
Thanks!

Re: How to draw X and Y axis?

Heath Stewart3-Feb-04 3:58

Heath Stewart

3-Feb-04 3:58

There's plenty of examples of how to do this on CodeProject; you need only search[^].

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Run .NET executable without the framework installed

jvbragt3-Feb-04 2:51

jvbragt

3-Feb-04 2:51

Is it possible to run a .NET executable without installing the .net framework ?
For example to link the framework and the application into one executable ?

Re: Run .NET executable without the framework installed

Joel Lucsy3-Feb-04 2:53

Joel Lucsy

3-Feb-04 2:53

No, to the dismay of most .NET programmers everywhere.

--
Joel Lucsy

Re: Run .NET executable without the framework installed

OmegaSupreme3-Feb-04 3:04

OmegaSupreme

3-Feb-04 3:04

joel[^] was on about this the other day, what you need is a linker of which apparently only one exists :

http://www.remotesoft.com/linker/[^]

I dont know how good it is or not but if I where you I'd get used to the fact that if you're doing .net your gonna need the user to have the runtime installed.

The smaller the mind the greater the conceit.
Aesop

Re: Run .NET executable without the framework installed

Heath Stewart3-Feb-04 3:56

Heath Stewart

3-Feb-04 3:56

Whether it's possible or not, this should not be used! It's a .NET application and requires the .NET Framework, just like Java requires the JRE, VB (pre-.NET) requires the VB virtual machine, C/C++ requres a C runtime library, Perl requires the perl runtime, etc.

Yes, this program may allow you to pre-link the necessary assemblies but you loose practically all the benefits of the framework, such as assembly redirection, certain levels of code access security (since it could only be verified at link time) which also means malicious code targeting the CLR can now wreak havoc on your machine, and much more.

It's not like you have to install the Framework every time you install a program. More and more machines are getting it as people with half a brain use Windows Update, and if you distribute on a CD then size should've be a problem. If you have the means, you can also use an installer that downloads the .NET Framework from a server if it isn't installed yet and there are many such examples here on CodeProject, such as Enhanced .NET Bootstrap Setup[^].

If you don't want to worry about all the advantages the Framework provides, then don't use it.

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Re: Run .NET executable without the framework installed

TigerNinja_3-Feb-04 17:41

TigerNinja_

3-Feb-04 17:41

you need the .NET runtime installed. You can write an installation program with VS.NET, and have it check for the runtime, and if not present it will be installed.

So in general, your installation .exe will have the .net runtime embedded, but it must be installed.

R.Bischoff
.NET, Kommst du mit?

Create a file and set the extended properties like companyname, comment, etc.

jvbragt3-Feb-04 1:30

jvbragt

3-Feb-04 1:30

I know it is possible to get the extended properties of an existing file with System.Diagnostics.FileVersionInfo.GetFileVersionInfo().
But what i want is to set these properties when i create a new file.

Re: Create a file and set the extended properties like companyname, comment, etc.

Heath Stewart3-Feb-04 4:05

Heath Stewart

3-Feb-04 4:05

If you're using VS.NET, fill in the assembly attributes in your AssemblyInfo.cs file. If not, use the AssemblyTitleAttribute, AssemblyCompanyAttribute, AssemblyDescriptionAttribute, AssemblyProductAttribute, AssemblyCopyrightAttribute, AssemblyVersionAttribute (I recommend for many reasons that you not use the asterisk (*) for automatic versioning because Types as defined for a particular assembly version and you can loose control of bindings quickly), and you should use an AssemblyKeyFileAttribute or AssemblyKeyNameAttribute with the path (or the container name) of a key pair you generate using sn.exe -k KeyPair.snk and use for all your products, but keep it secure. This helps with identifying your assembly, assembly binding, and more. See http://msdn.microsoft.com/netframework/?pull=/library/en-us/dnnetsec/html/strongNames.asp[^] for more reasons to sign your assembly (to give it a strong name).

All attributes above are prefixed with the assembly: declaration to attribute the assembly itself. You can find these and more attributes (like to control the file version separate from the assembly version, but make sure you understand exactly what versioning means in reference to .NET) in the System.Reflection namespace.

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Re: Create a file and set the extended properties like companyname, comment, etc.

jvbragt3-Feb-04 4:18

jvbragt

3-Feb-04 4:18

Thanks for the detailed info, but unfortunately this is not what i meant.
It's not for my application's executable !
My application creates several text files. And those text files needs a subject, title, comments etc.

Re: Create a file and set the extended properties like companyname, comment, etc.

Heath Stewart3-Feb-04 6:00

Heath Stewart

3-Feb-04 6:00

When you mentioned System.Diagnostics.FileVersionInfo.GetFileVersionInfo you're implying the VersionInfo block of an executable. Only executables (.exe, .dll, .ocx, etc.) have VersionInfo blocks, as they are compiled and placed into the .rsrc section of a PE/COFF executable file.

What you're wanting is alternative data-streams in files on NTFS, and it isn't supported in the .NET base clas libraries. These are what Office has used for a long time and Windows 2000 added to any file (it was always supported on NTFS, but didn't have a UI to use it). For a brief but decent article about this on CodeProject, see Accessing Alternative Data-Streams of Files on an NTFS Volume[^].

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message boxes

ASGill3-Feb-04 1:29

ASGill

3-Feb-04 1:29

i did some coding for message boxes but the result was some errors which i had no clue of what it was trying to say...can anyone teach me whats the correct way to code a message box and do i need to declare it like this

"private System.Windows.Forms.Message;" <-- i add this and i get one error

error = Invalid token ';'in class, struct or interface member declaration.

i dont add it SIX more errors come up...help me guys...

Arvinder Gill

Re: message boxes

sps-itsec463-Feb-04 2:09

sps-itsec46

3-Feb-04 2:09

I don't know if I totally understood what you want to do...
if you just want to display a message box do it this way:

At the top of your source file:

using System.Windows.Forms;

To display a message box:

MessageBox.Show("Some text for the message box", "Caption text",
    MessageBoxButtons.OK, MessageBoxIcon.Error);

Check the MSDN for MessageBox.Show() to see all overloads and possible parameters...

I hope I could help you... Wink | ;)

Regards, mYkel

Re: message boxes

thomasa3-Feb-04 2:22

thomasa

3-Feb-04 2:22

Here is an exampel:

System.Windows.Forms.MessageBox.Show("Here you write the message inside the box","Here you write the header of the messagebox ", MessageBoxButtons.OK,MessageBoxIcon.Exclamation);

This will create a messagebox, with one OK button(MessageBoxButtons.OK), and a picture of an exclamation (MessageBoxIcon.Exclamation)

You should not declare the messagebox as a private item(I'm not even shore if it's posible)

Re: message boxes

dxhdxh3-Feb-04 3:10

dxhdxh

3-Feb-04 3:10

using System.Windows.Forms;
................
MessageBox.Show("Your error!");

Re: message boxes

Heath Stewart3-Feb-04 6:17

Heath Stewart

3-Feb-04 6:17

All the answers above are correct - use the MessageBox class. The Message class encapsulates a Windows Message that is recieved through a window procedure or application/system hook and is completely different. Also, you didn't even specify a member name in your statement - just a Type with an access modifier, i.e. you didn't specify WHAT you were declaring.

At any rate, you shouldn't (can't without reflection anyway) hold a reference to a MessageBox (only contains statics) and that's probably what you want anyway judging by your subject line.

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Re: message boxes

ASGill3-Feb-04 16:58

ASGill

3-Feb-04 16:58

Thanx for the solutions but.....i tried all three solutions....i dunno why, but i still get the same errors...tried searchin around but to no avail...couldnt find one solution at all...well this is my last resort...i hope someone can point out whats wrong whit this code ..:

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;

namespace CLINICINFORMATIONSYSTEM
{

/// Summary description for Password.
public class frmPassword : System.Windows.Forms.Form
{
private System.Windows.Forms.TextBox txtUserName;
private System.Windows.Forms.TextBox txtPassword;
private System.Windows.Forms.Label lblUserName;
private System.Windows.Forms.Label lblPassword;
private System.Windows.Forms.Button btnOK;
private System.Windows.Forms.Button btnCancel;
private System.Data.SqlClient.SqlConnection sqlConnection1;

private System.ComponentModel.Container components = null;

public frmPassword()
{

InitializeComponent();
SqlConnection myConnection = new SqlConnection("user
id=username;" +
"password=password;server=serverurl;" +
"Trusted_Connection=yes;" +
"database=database; " +
"connection timeout=30");
try
{
myConnection.Open();
}
catch(Exception e) <problem area, error 1>
{
MessageBox.Show("Unable to connect to server. Please try again" , "Reminder" , MessageBoxButtons.RetryCancel , MessageBoxIcon.Warning); <problem area, error 4 and 5>
}

}

private void btnOK_Click(object sender, System.EventArgs e)
{
if(txtPassword.Text > 10) <problem area, error 3>
{
MessageBox.Show("The password should not be more than TEN characters. Please check your password again", "Reminder" ,MessageBoxButtons.OK,MessageBoxIcon.Warning); <---the problem area again! <problem area, error 2>
}
else.............

..............................................................................
with this i get these errors :

1 . the value 'e' is declared but never used

2 . The best overloaded method match or'System.Windows.Forms.MessageBox.Show string, string, System.Windows.Forms.MessageBoxButtons)' has some invalid arguments

3. Operator '>' cannot be applied to operands of type 'string' and 'int'

4. Argument '3': cannot convert from 'System.Windows.Forms.MessageBoxIcon' to 'System.Windows.Forms.MessageBoxButtons'

5. Argument '2': cannot convert from 'System.Windows.Forms.MessageBoxButtons' to 'string'

well im really hoping someone could point out to me whats realy wrong with this code...im nearing my deadline but this problem has delayed me by a DAY!!

Thanx a million

Arvinder Gill

Re: message boxes

Heath Stewart3-Feb-04 18:04

Heath Stewart

3-Feb-04 18:04

This isn't a difficult problem if you'd only read the .NET Framework SDK documentation. Type MessageBox.Show in the help index and you'll see all the overloads. Most of your method calls are all wrong. The majority of your errors are because you're using the wrong parameters in the wrong order for MessageBox.Show - this is all documented in the .NET Framework SDK. "Error" 1 isn't even an error - it's a warning. If you're not going to use the exception information, then you don't need to declare an Exception variable. You can do either of the following:

try
{
}
catch (Exception)
{
}
// OR
try
{
}
catch
{
}

You must read the documentation. Fumbling around blind won't help. Even looking at the documentation displayed in IntelliSense (the drop-down menu that appears when you're coding statements) would tell you what parameters should go where.

Also, in one line you're trying to use the > operator with a string! This doesn't work. If you want to check the length, use txtPassword.Text.Length > 10.

In many of your incorrectly called MessageBox.Show calls, you call it using specific buttons but you never compare the return with a DialogResult! What's the point? If all you're doing is displaying an error to a user, you shouldn't even define which buttons to display because "OK" is the default button. If you actually get the return value and compare it against a DialogResult enumeration, that's a different subject:

DialogResult result = MessageBox.Show("Would you like to retry?", "Prompt",
  MessageBoxButtons.YesNo, MessageBoxIcon.Question);
if (result == DialogResult.Yes)
{
  // Retry code.
}

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PrintPreviewDialog

Anonymous3-Feb-04 1:16

Anonymous

3-Feb-04 1:16

Hi everybody.

Does anybody know how to set the zoom factor of a PrintPreviewDialog before
loading the form???????

I found this example:
// Set the zoom to 50 percent.
this.printPreviewDialog1.Zoom = 0.50;

But C# doesn't know this property...

Thanks Jeff.

Re: PrintPreviewDialog

Heath Stewart3-Feb-04 4:18

Heath Stewart

3-Feb-04 4:18

It's not that C# doesn't "know" this property, it's that it does not exist. C# is just one of many languages that target the CLR and uses the same assemblies in the same way as any other language can (though some language features - not class members - are not supported by all languages).

In this example you saw, either the author is wrong (like I said, the Zoom property doesn't exist) or he has created his own PrintPreviewDialog class, or he is using the PrintPreviewControl and either named it differently or hosted it in a dialog and is encapsulating the PrintPreviewControl.Zoom property. You could do the same thing.

The PrintPreviewControl does have a Zoom property but you must host this control in your own Form. One final way is to enumerate the PrintPreviewDialog.Controls property and find the PrintPreviewControl that it uses internally and then set the Zoom property on that, like so:

foreach (Control c in this.printPreviewDialog1.Controls)
{
  if (c is PrintPreviewControl)
  {
    ((PrintPreviewControl)c).Zoom = 2.0f;
  }
}

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Re: PrintPreviewDialog

Anonymous4-Feb-04 1:05

Anonymous

4-Feb-04 1:05

Thank you for the solution.

I tried it already. It works. The papersize is shwon in 75 percent, when I use this code:

<br />
foreach (Control c in this.printPreviewDialog1.Controls)<br />
{<br />
	if (c is PrintPreviewControl)<br />
	{    <br />
		((PrintPreviewControl)c).Zoom = 0.75;<br />
	}<br />
}<br />

But there is one more problem:
In the menu is the menuitem "automatic" still ckecked and not correctly the menuitem "75%".

Did you know any trick so set the correct menuitem (75%)?

Regards, Jeff

Re: PrintPreviewDialog

Heath Stewart4-Feb-04 3:42

Heath Stewart

4-Feb-04 3:42

This incorrect behavior doesn't surprise me. You are, after all, accessing this control in a way that wasn't intended (otherwise it won't be exposed as a property of PrintPreviewDialog, or at least some of its properties like Zoom would). Unfortunately, there doesn't appear to be an easy way to correct this problem. When the Zoom property is changed, and event isn't even fired so you'd have to keep the values in sync yourself!

The only way I can think of is to get the ComboBox using the same enumerative code I gave you for the control, and update it when you programmatically change the Zoom. You can use ildasm.exe (the IL disassembler) that comes with the .NET Framework SDK to figure out in what Controls collection the ComboBox is added. If you can't read IL (and it wouldn't hurt to learn - it definitely can help you understand how to write more efficient code at the very least), you can use a good decompiler like .NET Reflector[^].

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