Reach usercontrol's child control's methods - C# Discussion Boards

Re: Add more detail on creating an XML file

16-May-14 8:09

I am able to create a XML file like this:

XML

<?xml version="1.0"?>

-<testsuite>

<Name>testsuite</Name>

<Address>Colony</Address>

<Char>arc</Char>

</testsuite>

With the following code:

// Create a new file in C:\\ dir
XmlTextWriter textWriter = new XmlTextWriter("C:\\XML files\\API_PASS.xml", null);

// Opens the document
textWriter.WriteStartDocument();
            
// Write first element
textWriter.WriteStartElement("testsuite");
 
// Write next element
textWriter.WriteStartElement("Name", "");
textWriter.WriteString("testsuite");
textWriter.WriteEndElement();

// Write one more element
textWriter.WriteStartElement("Address", ""); textWriter.WriteString("Colony");
textWriter.WriteEndElement();

// WriteChars
char[] ch = new char[3];
ch[0] = 'a';
ch[1] = 'r';
ch[2] = 'c';
textWriter.WriteStartElement("Char");
textWriter.WriteChars(ch, 0, ch.Length);
textWriter.WriteEndElement();

// Ends the document.
textWriter.WriteEndDocument();

// close writer
textWriter.Close();

*) But I was required to add some more detail for the first element (keep the last line as it is), for example:

HTML

-<testsuite errors="0">

I tried to add in the:

HTML

textWriter.WriteStartElement("testsuite errors=\"0\");

but it shows nothing in the xml file

Anyone can help?

Eddy Vluggen16-May-14 9:00

Eddy Vluggen

16-May-14 9:00

You don't need to write another element, but an attribute[^] inside that element.

Bastard Programmer from Hell Suspicious | :suss:

If you can't read my code, try converting it here[^]

Re: Add more detail on creating an XML file

Senthilkumar C K20-May-14 15:17

Senthilkumar C K

20-May-14 15:17

code snippet for adding attribute in xml:

xmlWriter.WriteStartElement("testsuite");
xmlWriter.WriteAttributeString("errors", "0");

Writing to Opened File

RebornProgrammer16-May-14 5:00

RebornProgrammer

16-May-14 5:00

Hi all, is it possible to write to a file using a StreamWriter object while the file is open. What I'm trying to do is create a webpage for personal use that will serve as a webpage editor. In this page there will be an iframe, 2 text boxes and a button which will be used to specify which page element to modify.

In the iframe of this page I want to be able to open any webpage in my domain. Then I want to be able to modify things on the page inside the iframe such as text and images. I'm planning to read the code and markup of the page being displayed in the iframe using a StreamReader object, and modify it using a StreamWriter object while it's still open.

Is this doable? Please comment, thanks in advance.

modified 17-May-14 4:56am.

Reach usercontrol's child control's methods

op7516-May-14 4:09

op75

16-May-14 4:09

Hi,
I need to create a usercontrol containing a listbox and a scrollbar in order to be able to skin the scrollbar.
Unfortunately, I have to recode all listbox's methods if I want my usercontrol to have the same behavior as a classical Listbox... Frown | :(

Is there a better way to reach all the listbox's methods without recoding them all ?
Thanks in advance, that'll be very usefull Smile | :)

Richard MacCutchan16-May-14 6:38

Richard MacCutchan

16-May-14 6:38

Why would you want to do this in the first place? And why do you think you will have to recode all the ListBox's methods? Isn't that why OOP includes inheritance?

OriginalGriff16-May-14 8:03

OriginalGriff

16-May-14 8:03

Don't think he can inherit - sound like he is encapsulating the Listbox and a Scrollbar, so he can't inherit directly from the ListBox. Which means he has to provide pass-through methods or expose the ListBox directly - which he doesn't want to do.

Those who fail to learn history are doomed to repeat it. --- George Santayana (December 16, 1863 – September 26, 1952)
Those who fail to clear history are doomed to explain it. --- OriginalGriff (February 24, 1959 – ∞)

Richard MacCutchan16-May-14 21:25

Richard MacCutchan

16-May-14 21:25

You may well be right.

Emre Ataseven17-May-14 10:55

Emre Ataseven

17-May-14 10:55

If you want to access events of listbox in usercontrol without extra effort, not possible.

If you want to access properties of listbox, create a property in Userclass.

public ListBox listBox
{
    get { return listBox1; }
}

and you need to define all required events;

public event EventHandler ListBoxClick
{
    add { listBox1.Click += value; }
    remove { listBox1.Click -= value; }
}

Tim Toady Bicarbonate

modified 17-May-14 17:04pm.

SledgeHammer0117-May-14 11:31

SledgeHammer01

17-May-14 11:31

Learn WPF. This is EXACTLY what its intended for. ZERO C# to skin a control and its scrollbars.

Fail to click on Child windows using API

op7518-May-14 22:00

op75

18-May-14 22:00

Thanks for all four replies Wink | ;)

I came to the evidence that I need to learn WPF Smile | :)

Member 1063699816-May-14 3:29

16-May-14 3:29

I have used SPY to find the intended Child window and used those DllImport("user32", ... as indicated in http://msdn.microsoft.com/en-us/magazine/cc163738.aspx#S3, but it doesn't work with the following codes:

WindowsEnumerator enumerator = new WindowsEnumerator();
          
foreach (WindowsEnumerator.ApiWindow top in enumerator.GetTopLevelWindows())
{
    if (top.MainWindowTitle == "Client Builder")
    {
        foreach (WindowsEnumerator.ApiWindow child in enumerator.GetChildWindows(top.hWnd))
        {
            if (child.ClassName == "Child_ClassName" && child.MainWindowTitle == "Child_Title")
            {
                IntPtr Chd_win = IntPtr.Zero;

                // GUI 
                Chd_win = FindWindowEx(hwnd, Chd_win, child.ClassName, child.MainWindowTitle);
                           
                PostMessage(Chd_win, WM_LBUTTONDOWN, 5, 5); // button down 
                PostMessage(Chd_win, WM_LBUTTONUP, 5, 5); // button up
                           
                MessageBox.Show(child.ClassName + ", " + child.MainWindowTitle, "");
            }
        }
    }
}

*) The Child Window pointer Chd_win always returns Zero even if it found the correct child.MainWindowTitle & child.ClassName (it confirms with the MessageBox.Show(child.ClassName + ", " + child.MainWindowTitle, "")

*) I can send the image with the SPY shows Child Window with the GUI if you provide the Email address (for easier to understand my problem)

Thanks in-advanced D'Oh! | :doh:

Alan N16-May-14 5:46

Alan N

16-May-14 5:46

Can you explain how your code operates, that is, what do you think it does.

I have
1) Enumerate all top level windows and select one by title
2) Enumerate the 1st level of child windows and select one by class name and title
3) ???

What is that FindWindowEx call doing? The assignment of the hwnd argument is unclear (typo?) but as configured FindWindowEx is searching for the first child of 'hwnd' with the same classname and title as the child window found by the GetChildWindows enumerator. If the call is successful what is the relationship of the window found to the selected child window found by the enumerator?

Alan.

Member 1063699816-May-14 6:43

16-May-14 6:43

- The function FindWindowEx(hwnd, Chd_win, child.ClassName, child.MainWindowTitle); supposed to return the Child Window pointer (Chd_win) which referent from child.ClassName & child.MainWindowTitle (from Parent Window = hwnd pointer)

- In my case I do have correct hwnd pointer (parent) and its child.ClassName & child.MainWindowTitle also correctly ... however, somehow it couldn't find Child Window pointer = Chd_win!!!

I hope that I explain correctly!

Alan N16-May-14 8:32

Alan N

16-May-14 8:32

I was trying to understand why you were calling FindWindowEx but I'm still not sure.

Are you saying that the GetChildWindows method can create an ApiWindow object where the ClassName and MainWindowTitle properties have the expected values but the hWnd property value is IntPtr.Zero.

Member 1063699816-May-14 10:34

16-May-14 10:34

By any chance I can send you a image which show you what my Window parent & Child looks like (including SPY contents) through your Email?

I also can send you my project so that you can see full DLL Imports

- It will easy to understand the issue!

Alan N19-May-14 1:50

Alan N

19-May-14 1:50

No thanks to the email option. I'm still trying to find out why FindWindowEx is being used. In the code fragment the child window enumerator returns the ApiWindow 'child' from which you get ClassName and MainWindowTitle. Why did you not use child.hWnd to get the required handle for use in PostMessage?

foreach (WindowsEnumerator.ApiWindow child in enumerator.GetChildWindows(top.hWnd))
{
    if (child.ClassName == "Child_ClassName" && child.MainWindowTitle == "Child_Title")
    {
        IntPtr Chd_win = IntPtr.Zero;

        // GUI
        Chd_win = FindWindowEx(hwnd, Chd_win, child.ClassName, child.MainWindowTitle);

        PostMessage(Chd_win, WM_LBUTTONDOWN, 5, 5); // button down
        PostMessage(Chd_win, WM_LBUTTONUP, 5, 5); // button up

        MessageBox.Show(child.ClassName + ", " + child.MainWindowTitle, "");
    }
}

Member 1063699819-May-14 6:04

19-May-14 6:04

The reason is that the PostMessage require the Pointer of the Child Window (not the handle) to place the focus on that Child Window then simulate clicking on the its intended Button (that what I understand from it)

*) My main purpose is trying to simulate clicking on intended Button (not using mouse) on a Child Window ... I don't mind to use other methods (but so far on the other methods which I found, they couldn't help)

- By the way, I have just replied my own post to mentionned that the code posted working fine if the Child Window is 2nd level from the Parent Window ... in my case the intended Child Window is lower than that ... so I still looking the way to go ditectly to it!

modified 19-May-14 12:55pm.

Member 1063699819-May-14 6:33