a ? b : c? - C# Discussion Boards

Starting Robocopy From A Service

31-Jan-09 4:33

hi..

follow this link...

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rich_wenger30-Jan-09 2:37

rich_wenger

30-Jan-09 2:37

Hi, and thanks for your interest.

I am trying to run MS Robocopy from a service with the following code:

Process robo = new Process();

robo.StartInfo.FileName = "robocopy.exe";
robo.StartInfo.Arguments = "g:\\data *.pdf d:\\data\\pdf\\ /S /NP /Log+:c:\\logs\\robo\\robo.log";
robo.Start();

The service starts but the Robocopy process fails to start. Any help greatly appreciated.

C. Richard Wenger

System Administrator

musefan30-Jan-09 2:50

30-Jan-09 2:50

your filename prob needs to be the full path of the executable

rich_wenger30-Jan-09 3:47

rich_wenger

30-Jan-09 3:47

I dropped the Robocopy.exe in the system32 folder just to have it in the path and eliminate those issues and on your advice I included the full path to the executable but it still doesn't appear to be executing?

C. Richard Wenger

System Administrator

musefan30-Jan-09 3:54

30-Jan-09 3:54

well as your only setting 2 things (filepath, and parameters) are you sure the parameter string is valid? I.e. tested with CMD or something?

I never used Robocopy so i wouldnt know the params, if both are valid then i would guess the problem is else where in your code.

What functionality does Robocopy do? is it not something you can code yiurself

Dave Kreskowiak30-Jan-09 6:08

Dave Kreskowiak

30-Jan-09 6:08

Try running your service under a user account instead of LocalSystem and see what happens.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

a ? b : c?

bfis10813730-Jan-09 2:24

bfis108137

30-Jan-09 2:24

What does this do? I haven't been able to find a suitable explanation as to what it does and i found it in some code that someone gave me.

musefan30-Jan-09 2:27

30-Jan-09 2:27

i think its something along the lines of:

If a is true, then result is b, otherwise result is c

Le centriste30-Jan-09 2:33

Le centriste

30-Jan-09 2:33

x = a ? b : c;

is the shorthand version of

if (a)
{
    x = b;
}
else
{
    x = c;
}

harold aptroot30-Jan-09 2:36

harold aptroot

30-Jan-09 2:36

Except that ?: counts as an expression, instead of a statement. So there are more places where you're allowed to use it.

Such as:

if (a?b:c) { /* some code */ }

int x = a?b:c;

(that doesn't mean you're wrong, I just think it might help bfis108137 to know that)

Pete O'Hanlon30-Jan-09 2:35

Pete O'Hanlon

30-Jan-09 2:35

It's known as a ternary operator. Basically, this is an operator that reads like this: "If the condition is true then use the value immediately after the question mark, otherwise use the value after the colon". Another operator you may sometimes see is the ?? operator. This is known as the coalescing null operator, and is used in statements like this:

MyClass a = value1 ?? value2 ?? new MyClass();

This reads like this "MyClass a is assigned value1, unless value1 is null in which case, it will use value2, unless value2 is null in which cass it uses new MyClass();" This is an efficient way to assign a default value if a null value is encountered.

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

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EliottA30-Jan-09 3:13

EliottA

30-Jan-09 3:13

see Ternary Operation[^], and ?:[^] specifically.

#realJSOP30-Jan-09 3:28

#realJSOP

30-Jan-09 3:28

It's called a ternary operation, and is the shortcut of doing this:

int z = 0;
int x = 1;
int y = 2;
if (x==y)
{
    z = x;
}
else
{
    z = y;
}

// in the format you cited:

z = (x ==y) ? x : y;

Many high-browed programmers don't like it, but as long as you keep it to just one comparison instead of stacking them, I think it's an acceptable coding practice.

PIEBALDconsult30-Jan-09 7:04

PIEBALDconsult

30-Jan-09 7:04

Right, it should not be abused; I would not use it as z = (x ==y) ? x : y;, because an if statement would work for that.

One situation I use it in is something like this:

string.Format
(
    "{0} record{1} processed."
,
    count
,
    count==1?"":"s"
) ;

I find this more readable than the alternatives.

Whenever I see an application write something like, "1 records processed", I Sigh | :sigh:

. Come on, guys, use the ternary operator!

Najmal31-Jan-09 4:38

Re: Register a ocx in system

31-Jan-09 4:38

hi...

If "a" is true then return value is "b"
else return value is "c"

EXAMPLE::

int nLargeNo=0, nFirstNo=100,nSecondNo=200;
nLargeNo = (nFirstNo>nSecondNo)?nFirstNo:nSecondNo;

Answer:
value of nLargeNo is 200

anishkannan30-Jan-09 2:13

anishkannan

30-Jan-09 2:13

AnyBody Help me...

The .ocx file was registered in system using batch file,
Before run our application.Otherwise device is not supported in our application
If want to run our application in new system, that ocx file must be register now that is explicit.

now what i am want means, The ocx file registered through C# application
And Another important thing that is registered only when first time execution our application.
And further run our application, that registration code must be skip.

Doubt: If registered more than one times in same path or different path, what happened, and affected Operating System or harddisk.

Dave Kreskowiak30-Jan-09 6:06

Dave Kreskowiak

30-Jan-09 6:06

So, try and create an instance of the control. If it works, the control is already registered. If not, then you can register the control using the Process class and launching the "REGSVR32" command line to register it.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

Re: Register a ocx in system

Najmal31-Jan-09 4:41

How to use ConfigurationManager to modifying "applicationSettings" section of App.config using .NET (C#) Visual Studio2005

31-Jan-09 4:41

its a nice idea....
thnks...

Thomas_Mathews30-Jan-09 2:04

Thomas_Mathews

30-Jan-09 2:04

How to use ConfigurationManager to modifying "applicationSettings" section of App.config? Or it there any other way to do same? I have the code to modify "appSettings" section of app.config.

1) To modify key "SApp.Properties.Settings" of "appSettings" section of app.config I used below code::

ExeConfigurationFileMap fileMap = new ExeConfigurationFileMap();
fileMap.ExeConfigFilename = @"D:\app.config";
Configuration config = ConfigurationManager.OpenMappedExeConfiguration(fileMap, ConfigurationUserLevel.None);
AppSettingsSection section = (AppSettingsSection)config.GetSection("appSettings");
section.Settings["SApp.Properties.Settings"].Value = "i23";
config.Save();

2)My App.config has below content::
<?xml version="1.0" encoding="utf-8"?>

<appSettings>
<add key="SApp.Properties.Settings" value="http://2344/soap/services"/>
</appSettings>

<applicationSettings>
<Generate.Properties.Settings>
<setting name="Generate_GeneratePDFServiceService"
serializeAs="String">
<value>http://2435/GeneratePDFService</value>
</setting>
</Generate.Properties.Settings>
</applicationSettings>

Re: How to use ConfigurationManager to modifying "applicationSettings" section of App.config using .NET (C#) Visual Studio2005

Manas Bhardwaj30-Jan-09 2:10

Manas Bhardwaj

30-Jan-09 2:10

Thomas_Mathews wrote:
How to use ConfigurationManager to modifying "applicationSettings" section of App.config

No, you can not. ConfigurationManager does not have an interface to do that. And the reason is based on design principles.
Though, you can use the code to modify the App.config considering it to be a xml file. I would suggest you to store the settings which may be changed using the application in some other Xml file/database.

Please remember to rate helpful or unhelpful answers, it lets us and people reading the forums know if our answers are any good.

Re: How to use ConfigurationManager to modifying "applicationSettings" section of App.config using .NET (C#) Visual Studio2005

Najmal31-Jan-09 4:50

Re: How to use ConfigurationManager to modifying "applicationSettings" section of App.config using .NET (C#) Visual Studio2005

31-Jan-09 4:50

Hi.......

U can use ConfigurationManager to modifying "applicationSettings" and also can do the
same by concidering it as a XML file...

Just follow below Link to know more...

About ConfigurationManager

Thomas_Mathews1-Feb-09 23:03

Thomas_Mathews

1-Feb-09 23:03

Hi All,
You can modify value of 'AppSettingsSection' by below code.

ConfigurationSectionGroup sectionGroup = config.SectionGroups["applicationSettings"];
ClientSettingsSection section = (ClientSettingsSection)sectionGroup.Sections["....Settings"];

section.Settings.Get("GeneratePDF...").Value.ValueXml.InnerText = urlname;
config.Save(ConfigurationSaveMode.Minimal, true);

-Thomas Smile | :)

Xor the hex values

M. J. Jaya Chitra30-Jan-09 1:51

M. J. Jaya Chitra

30-Jan-09 1:51

Dear All,

I have a sequence of hexa decimal values like 5C 8D 45 65 6F 0A without any spaces in between from an input channel.

Now I have to xor the whole decimal value with another hex value for example 4C and has to get the output and perform the operations based on the result.

The sequence of hex values can be of 40 bytes long.

I don't know how to xor the values.

Can any one tell me how to perform the above?

Thanks a lot in advance.

Best Regards,
M. J. Jaya Chitra

Re: Xor the hex values

musefan30-Jan-09 2:05