Re: Form Design Quandries - C# Discussion Boards

6-May-03 7:54

Hey All,

I have an MDI parent Container, I dock a tree view control to the left of that container, and bring up various child forms on the right side of that container. Im having an issue with this, I dont want the user to beable to resize or move the child forms I bring up, I want it all done through the treeview control. When I maximize the code in the form, I set the Control Box, Minimize, and Maximize properties to false, but for some odd reason it still displays the control box and other buttons in the file menu bar of the parent container. The funny thing is, it has disabled the close and minimize buttons. Another odd point to consider is that the restore button is enabled, so if the user clicks it, my form will shrink down to its original size, but after you click the restore button and only after you click the restore button, the control box goes away. Heres the code

this.SuspendLayout();
Form cForm = new Form();
cForm.MdiParent = this;
cForm.WindowState = FormWindowState.Maximized;
cForm.FormBorderStyle = FormBorderStyle.None;
cForm.MaximizeBox = false;
cForm.MinimizeBox = false;
cForm.ControlBox = false;
cForm.Show();
this.ResumeLayout();

Any Ideas would be greatly appreciated.

Thanks,
Ryan

Stephane Rodriguez.6-May-03 9:07

6-May-03 9:07

Ryan@SalamanderTechnologies wrote:
cForm.FormBorderStyle = FormBorderStyle.None;
cForm.MaximizeBox = false;
cForm.MinimizeBox = false;
cForm.ControlBox = false;

Those things work perfectly well when the child form is not maximized.

The trouble is, when a child form gets maximized, then the border used is the MDIClient's border, not the child's border. As a result, minimize/maximize/control boxes are displayed regardless of what you is set for the child form.
Since the MDIClient is a private Form member, the only way I can think of to get around this is to directly manipulate the MDIClient window style, using native code : WIN32.SetWindowLong(this.Handle, GWL_STYLE, WIN32.GetWindowLong(this.Handle, GWL_STYLE) ~ (WS_MAXIMIZEBOX|WS_MINIMIZEBOX)); // may be won't compile, but you get the idea

The MDICLient window handle can be retrieved by looking up the this.Controls collection, looking for a member of type MDIClient :

int nbControls = this.Controls.Count;
for (int i=0; i<nbControls; i++)
{
  Control pCtrl = this.Controls[i];
  if ( pCtrl.GetType()== typeof(System.Windows.Forms.MdiClient) )
  {
    ...
  }
}

RB@Emphasys6-May-03 9:12

6-May-03 9:12

Thanks for the suggestion, I thought it might have been something along those lines.

Thanks again,
Ryan

RB@Emphasys6-May-03 9:21

6-May-03 9:21

By the way, anyone else who runs into this problem might be helped but a little work around I've found. If you set the form to minimized initially, then call the form show method, and after that call the form maximized method, you get the desired effect. You just have to deal with the little annoying effect of the form going from minimized to maximized, which isnt really that bad.

Thanks,
Ryan

Stephane Rodriguez.6-May-03 9:20

6-May-03 9:20

I have managed to sort it out. Add this following code once your child form is created (and in fact anytime a child form is created/destroyed/...) :

[DllImport("user32.dll", CharSet=CharSet.Auto)]
public static extern long GetWindowLong(IntPtr hWnd, int style);

[DllImport("user32.dll", CharSet=CharSet.Auto)]
public static extern void SetWindowLong(IntPtr hWnd, int style, long value);
<p> </p>
const int GWL_STYLE = -16;
const long WS_MINIMIZEBOX = 0x20000;
const long WS_MAXIMIZEBOX = 0x10000;

int nbControls = this.Controls.Count;
for (int i=0; i<nbControls; i++)
{
  Control pCtrl = this.Controls[i];
  if ( pCtrl.GetType()== typeof(System.Windows.Forms.MdiClient) )
  {
    long nStyle = GetWindowLong(pCtrl.Handle, GWL_STYLE);
    nStyle ^= (WS_MINIMIZEBOX | WS_MAXIMIZEBOX);
    SetWindowLong(pCtrl.Handle, GWL_STYLE, nStyle);
  }
}

As I have already said, this forces the MDIClient's window style not to show either caption boxes.

RB@Emphasys6-May-03 9:22

6-May-03 9:22

Thanks!!!

Related to Files

Kant6-May-03 7:42

6-May-03 7:42

1. How to check the file is good before I proceed?
ex: In C++ I check like this:

    // Open the given filename for reading<br />
	  TRY   { oFile = new CFile (filename, CFile::modeRead); }<br />
	  CATCH ( CFileException, e ) { oFile = NULL;}<br />
	  END_CATCH<br />
    }<br />
<br />
	// Check for open testfile prior to read operations<br />
	if (oFile) <br />
       {<br />
....<br />
          }

How to do this in C#?

2. What's equivalent of char * in C#?

Don't Beer | [beer]

and drive.

Stephane Rodriguez.6-May-03 7:58

6-May-03 7:58

bool bExists = new System.IO.FileInfo(@"c:\test.txt").Exists;
long nLength = new System.IO.FileInfo(@"c:\test.txt").Length;

About char*, it's somewhat harder to answer. What's is supposed to be in managed code depends on the semantics of that char* : is it a pointer to a single char (use IntPtr, and marshal to char[] back and forth) ? is it an input string (use String in your method call) ? is it a fixed string (use StringBuilder) ? is it an output string (use ref String) ?

Kant6-May-03 8:24

6-May-03 8:24

.S.Rod. wrote:
long nLength = new System.IO.FileInfo(@"c:\test.txt").Length;

This is thing works file.Length;

Is it OK?

.S.Rod. wrote:
About char*, it's somewhat harder to answer.

Wow...

In my case...Usually I do like this C++
Ex: (separator is LPCTSTR )

char*  Sep = NULL;<br />
int    sepLength = 0;<br />
if (sepLength = strlen (separator)) <br />
{<br />
      Sep = new char [sepLength + 1];<br />
      strcpy (Sep, separator);<br />
      Sep[sepLength] = '\0';<br />
}

Thx Rodrigez for clarfying my newbie doubts.

Don't Beer | [beer]

and drive.

Stephane Rodriguez.6-May-03 8:56

6-May-03 8:56

Kant wrote:
This is thing works file.Length;

fileinfo.Length, to be accurate.

Kant wrote:
In my case...Usually I do like this C++
Ex: (separator is LPCTSTR )
char* Sep = NULL;
int sepLength = 0;
if (sepLength = strlen (separator))
{
Sep = new char [sepLength + 1];
strcpy (Sep, separator);
Sep[sepLength] = '\0';
}

I believe that's what you do with C, not with C++. Wink | ;)

At least with C++ you can use the STL std::string, MFC CString, or whatever string class having a copy operator.

In managed code, everything is already done :
String s = separator; //

Daniel Turini6-May-03 8:21

Daniel Turini

6-May-03 8:21

you can check if a file exists with System.IO.File.Exists(filename)

My latest article: GBVB - Converting VB.NET code to C#

Split the file

Kant6-May-03 4:49

6-May-03 4:49

The file contents are like this:

ABC DFDFAS
- (separator)
DSFS FSDFSDJFSD DSFKDFJS
-
DSFS FSDFSDJFSD DSFKDFJS fsdfsdfasd

I want those strings to be separated by that separator to be stored in array(double linked list) like this:

ABC DFDFAS
DSFS FSDFSDJFSD DSFKDFJS
DSFS FSDFSDJFSD DSFKDFJS fsdfsdfasd

I can write it easily in VC++, but I am getting what I want with C#

string testString;<br />
string[] strArray;<br />
Int64 stringLen;<br />
				<br />
stringLen = 0;  <br />
<br />
FileStream file = new FileStream(filePath, FileMode.Open, <br />
				FileAccess.Read);<br />
<br />
StreamReader sr;<br />
 <br />
try<br />
{<br />
   // Create a new stream to read from a file<br />
   sr = new StreamReader(file);<br />
}<br />
catch(Exception ex)<br />
{<br />
  // show error ...<br />
  return;<br />
}<br />
				<br />
do <br />
{<br />
     testString = sr.ReadLine() + "\r\n";<br />
     strArray = testString.Split('-'); <br />
     stringLen = quote.Length;<br />
<br />
     for (int i = 0; i < quoteLen; i++) <br />
     {<br />
<br />
	if (strArray[i] != "") // Empty string<br />
	{	<br />
<br />
           if (!wordCounter.Contains(strArray[i])) <br />
	       {<br />
		<br />
		wordCounter.Add(strArray[i], 1);<br />
	       } <br />
		else <br />
		{<br />
                  // Repeat word???<br />
                }<br />
	}<br />
<br />
     }<br />
   }<br />
   while(sr.Peek() != -1);<br />
<br />
   sr.Close();<br />
<br />
   file.Close();

All I get is :
ABC
DFDFAS
DSFS
FSDFSDJFSD
....

Can you guide what I am doing wrong..

Don't Beer | [beer]

and drive.

Stephane Rodriguez.6-May-03 5:49

6-May-03 5:49

The problem lies in something that is not defined in this code : what is the class type for wordCounter ?

Is wordCounter a class which implements the IDictionary interface ? In this case, I think the "1" in
wordCounter.Add(strArray[i], 1); is wrong. A unique value is expected.

Kant6-May-03 6:12

6-May-03 6:12

.S.Rod. wrote:
what is the class type for wordCounter ?

SortedList wordCounter = new SortedList();

Ignore my code, I started with one thing and ended up doing something else.

If the file contents is like this:

The Code Project Rocks
-
Yes It does.
-
It's Awesome.

I want all those sentences stored in the SortedList.

What's the easiest way?

Don't Beer | [beer]

and drive.

Stephane Rodriguez.6-May-03 6:40

6-May-03 6:40

SortedList sL = new SortedList();

sL.Add( "The Code Project Rocks", 0);
sL.Add( "Yes It does.", 0);
sL.Add( "It's Awesome", 0);

int i=0;
while ( i < sL.Count )
{
MessageBox.Show( sL.GetKey(i).ToString() );
i++;
}

Kant6-May-03 6:54

6-May-03 6:54

But before I add those string to SortedList, how to strip to those strings which are separated by the separator ("-") from the file?

Is testString.Split('-') any good?

Don't Beer | [beer]

and drive.

Stephane Rodriguez.6-May-03 6:59

how to write C# Applet, display it in a web page and the requirement?

6-May-03 6:59

Kant wrote:
Is testString.Split('-') any good?

Yes. That's the simplest way to do so as long as there are no carriage returns between strings and separators. In which case, I would suggest to concatenate strings as you read the file (use StringBuilder, for performance reasons, since strings are immutable), and then call Split on the full string.

zoltix6-May-03 2:36

zoltix

6-May-03 2:36

how to write C# Applet, display it in a web page and the requirement?

Thank in advance for your help.

where ?documentation and tuto

-=zoltx=-

Re: how to write C# Applet, display it in a web page and the requirement?

Stephane Rodriguez.6-May-03 6:45