Problem with ListBox selectedValueChange event - C# Discussion Boards

Change Windows service to run under LocalSystem account from a user account (API)

kulile14-Nov-06 5:11

14-Nov-06 5:11

Good day.

I would like to know if there is an API i can use to change windows service to run under LocalSystem account from a user account. Currently I am using the API below to change the service from using a LocalSystem account to a user account.

public static int ChangeService(string Name, string Password, string serviceName)
{
ManagementBaseObject inParams = null;

ManagementObject srvc = new ManagementObject("Win32_Service.Name='" + serviceName + "'");

inParams = srvc.GetMethodParameters("Change");

inParams["StartName"] = Name; //account name .\\localaccount;

// 'domain\\domainaccount' (or account@somedomain on XP and up)
inParams["StartPassword"] = Password; // password

ManagementBaseObject outParams = srvc.InvokeMethod("Change", inParams, null);

return System.Convert.ToInt32(outParams.Properties["ReturnValue"].Value);
}

But the problem now is that i cant change the service back to LocalSystem.

Many thanks in advance.

Kulile --- RSA

Opening web page in a new tab

Mertli Ozgur Nevres14-Nov-06 4:41

Mertli Ozgur Nevres

14-Nov-06 4:41

Hi all
I am using the code below to open an internet explorer window:

System.Diagnostics.Process.Start(
"iexplore.exe",
"http://www.codeproject.com"
);

It works well, but in ie7, it opens a new window every time. But i want to open a new tab instead of a new window. Is there any way to do this?

Thanks

ozgur.nevres

Re: Opening web page in a new tab

Anthony Mushrow14-Nov-06 4:47

Anthony Mushrow

14-Nov-06 4:47

Stupid IE7, i don't like it.

Well, that doesn't work because it starts a whole new process, you want to tell the existing process to open up a new tab... i have no idea how to do that D'Oh! | :doh:

But i shall investigate... AWAY!

Re: Opening web page in a new tab

Eduard Keilholz14-Nov-06 4:53

Eduard Keilholz

14-Nov-06 4:53

Have you tried starting http://www.codeproject.com as a process in stead of iexplore??
System.Diagnostics.Process.Start("http://www.codeproject.com");

I haven't got IE7 installed so cannot test, i'm sorry, but maybe it's the trick Wink | ;-)

- - - --[ i love it when a plan comes together ]-- - - -

Re: Opening web page in a new tab

Mertli Ozgur Nevres14-Nov-06 5:00

Mertli Ozgur Nevres

14-Nov-06 5:00

GREAT! It worked.

Many thanks!
Beer | [beer]

And it is better than first one, cz it is using the default browser, not ie only. I changed my default browser to opera, and it opened a new tab in opera.
Cool | :cool:

ozgur.nevres

Re: Opening web page in a new tab

ed^nrgc14-Nov-06 5:19

ed^nrgc

14-Nov-06 5:19

Your problem is that you are starting a new iexplore process each time.

Re: Opening web page in a new tab

User 665814-Nov-06 5:59

User 6658

14-Nov-06 5:59

Mertli Ozgur Nevres wrote:
System.Diagnostics.Process.Start(
"iexplore.exe",

As a Firefox user I tell you: Don't - do - this - EVER! Sigh | :sigh:

Starting the link directly is okay on windows, windows will take care of it itself.

modified 12-Sep-18 21:01pm.

Problem with ListBox selectedValueChange event

digitalhand14-Nov-06 4:07

digitalhand

14-Nov-06 4:07

Hi all,

I have a problem with the ListBox Control. Let me first explain my application:

I have here a UserControl (contains list box and dataGridView) and form called AttendanceScreen (which reposibles to send data from database to UserControl). In additon, that form includes that UserControl.

So when the form loaded which contains the userControl, it will send dataSet to the userControl as data source for the listBox.
And when the user select any item from the listBox that event will be triggered by selectedValueChange. The handler of that event will be responsible about sending the value of selectedItem to the form by the Association relationship.

And my problem is located in this moment.

the excaption message said -> "NullReferenceException was unhandled by user code"

My code here:

userControl Class::

<br />
private void employeeListBox_SelectedValueChanged(object sender, EventArgs e)<br />
        {<br />
            if (IsReleased)<br />
            {<br />
                attendScreen.employeeAttendanceTriggered(int.Parse(this.employeeListBox.SelectedValue.ToString()));<br />
            }<br />
        }<br />
<br />

when I tested by MessageBox like

<br />
private void employeeListBox_SelectedValueChanged(object sender, EventArgs e)<br />
        {<br />
            if (IsReleased)<br />
            {<br />
                MessageBox.Show(this.employeeListBox.SelectedValue.ToString());<br />
            }<br />
        }<br />
<br />

it works fine. so where's the problem

*
I forgot to include that when I have tried to do everything in userControl (connecting to database and retrieve data and then displayed in dataGridView, it works fine for the dataGridView BUT all items in ListBox disappeared - no more selectedValueChange event fired)
*

Thanks in advance.

Re: Problem with ListBox selectedValueChange event

ed^nrgc14-Nov-06 5:14

ed^nrgc

14-Nov-06 5:14

Check out Event Bubbling

Re: Problem with ListBox selectedValueChange event

digitalhand14-Nov-06 9:49

digitalhand

14-Nov-06 9:49

edboe, thanks a lot!

views

sadafsagheer14-Nov-06 3:44

sadafsagheer

14-Nov-06 3:44

iam working in c# on stress testing tool,for this i have to track and record user activities performed by user after opening webpage .i need help in code form.

Re: views

PlayByTheRules14-Nov-06 4:20

PlayByTheRules

14-Nov-06 4:20

2. Be specific! Don't ask "can someone send me the code to create an application that does 'X'. Pinpoint exactly what it is you need help with.

Re: views

ed^nrgc14-Nov-06 5:17

ed^nrgc

14-Nov-06 5:17

I love your screen name.

Have you seen this thread? [^]

Re: views

saqib8214-Nov-06 23:41

saqib82

14-Nov-06 23:41

do you have any idea about hooks in VC?
you can track the activities of a user by using hooks. just read about how to implement hooks in c#.
regards

sAqIb

"Our scientific power has outrun our spiritual power. We have guided missiles and misguided men."
Dr. Martin Luther King Jr.

Windows Forms

tommypa7514-Nov-06 3:22

tommypa75

14-Nov-06 3:22

Hello

Let's say I have two forms, form1 and form2. Form1 have only one button and now each time I click this button form2 should show in the front of form1.

Well whats the best practice in doing such thing ? I mean I can create
one instance of form2 in the form1's constructor and then use only
Show() and Hide() methods of form2 or create new instance of form2
each time i click button on form1.

I'm not sure if my problem is clear enough Unsure | :~

. Let me now if you need more details.

greetings
tommy

Re: Windows Forms

ejuanpp14-Nov-06 3:41

ejuanpp

14-Nov-06 3:41

It all depends on what you want to do with your form.
Check Form.BringToFront() method Smile | :)

Re: Windows Forms

ed^nrgc14-Nov-06 5:20

ed^nrgc

14-Nov-06 5:20

Can't you show it as modal?

getting a string from dll & printing it on richtextbox...

IamHuM14-Nov-06 3:18

IamHuM

14-Nov-06 3:18

Hi...

I want to read a string from a dll & i want to print it in a rich text box on windows form.

How can i do this...?

How i can define a function which will return a string in dll file so that i can call that function from my form class & get the string to display on form...?

Thanks,

Vinay

Re: getting a string from dll & printing it on richtextbox...

Eduard Keilholz14-Nov-06 4:46

Eduard Keilholz

14-Nov-06 4:46

Erhmpff... this is really back to basic...

Create a solution with two projects
- Executable project (name : ExeProject)
- Class library (name DllClassLibrary)

in the class lib. create a class containing the following function :

public string MyRichText()
{
StringBuilder sbMyText = new StringBuilder();
sbMyText.Append("Text text text and even more text");
return sbMyText.ToString();
}

Then from your executable project, create a reference to the class lib and add a form containing a textbox. Name the textbox for instance txtTextFromDll

In the Load event of your form add the following lines :
DllClassLibrary.ClassName objMyClass = new DllClassLibrary.ClassName();
txtTextFromDll.Text = objMyClass .MyRichText();

you're pretty done there (except for when i miss something)

- - - --[ i love it when a plan comes together ]-- - - -

screen resolution changed event

freshonlineMax14-Nov-06 2:54

freshonlineMax

14-Nov-06 2:54

Hi How can i initilize if screen resolution changed?
I want to do some actions when screen resolution changed.
Help me please...

Re: screen resolution changed event

Martin#14-Nov-06 3:27

Martin#

14-Nov-06 3:27

Hello,

Microsoft.Win32.SystemEvents.DisplaySettingsChanged += newEventHandler(this.DisplayChanged);

public void DisplayChanged(object sender, EventArgs e)
{
}

should do it.

Hope that helps.

All the best,

Martin

Re: screen resolution changed event

freshonlineMax14-Nov-06 4:52

freshonlineMax

14-Nov-06 4:52

Hello Martin
You are cool!
You solved my problem ontime (fast, easy, complete);

My problem is controlling form object size in order to monitor resolution,
briefly "Auto Resizing Form Controls".
I couldn't solve this problem with "Dock" and "Anchor" properties.
Anyway, Tanx.

Regards.

Re: screen resolution changed event

Martin#14-Nov-06 5:21

Martin#

14-Nov-06 5:21

I'm happy if you are! :->

XML Tree View - Please Guide. [modified]

h@s@n14-Nov-06 2:21

h@s@n

14-Nov-06 2:21

I am new to C# you are requested to please guide.

I have very simple application.

1. Main Menu (File: Open, save, exit);

2. A tree view

3. Context Menu and ImageList

I have loaded xml file using open dialgoue. With XmlTextReader I have loaded xml file in tree view.

Please guide me from here below:

Now I want to add a context (pop-up) menu. That will enable me to add a node under three categories:

1. Before Node (Same level)
2. After Node (Same Level)
3. Child Node

If root node selected I would be able to ADD only child node in the tree. Means contextMenu will show only child enabled.

If element node selected I would be able to add before, after nodes or a child node. (Before and After creates element on same level under root).

Also I want cut, copy and paste functionality in context menu. That will enable me to cut, copy and paste nodes.

Save in MainMenu will enable me to save changes in according to tree modification.

Please tell me by examples. What steps should be taken? Waiting for your reply.

If user right clicks on node context menu appears and user select appropriately from enable menu for the selected node.

-- modified at 8:28 Tuesday 14th November, 2006

Re: XML Tree View - Please Guide.

Ed.Poore14-Nov-06 2:24

Ed.Poore

14-Nov-06 2:24

Thank you for letting us know that. Did you have a question you wanted to ask?

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