Re: TreeView expand - C# Discussion Boards

Re:Disabling maximising form by doubleclicking on winform header

kyreddy1-Aug-07 0:36

1-Aug-07 0:36

Hi,
Can Anybody help me which API should i use to disable double clicking on window border.When ever we double click on the windows form header it will maximises the window at the top left corner of the desktop.I want to disable this Property for my window.

Any help will be greatly appreciated.

Re:Disabling maximising form by doubleclicking on winform header [modified]

Martin#1-Aug-07 0:58

Martin#

1-Aug-07 0:58

Hello,

kyreddy wrote:
which API should i use to disable double clicking on window border

No API needed!

Just override WndProc method like this:

const int WM_SYSCOMMAND = 0x112;
const int SC_MAXIMIZE2 = 0xF032;
protected override void WndProc( ref Message m )
{
    if( m.Msg == WM_SYSCOMMAND )
    {
        if( m.WParam.ToInt32() == SC_MAXIMIZE2 )
        {
            return;
        }
    }
    base.WndProc( ref m );
}

Hope it helps!

-- modified at 7:09 Wednesday 1st August, 2007

All the best,

Martin

Re:Disabling maximising form by doubleclicking on winform header

kyreddy1-Aug-07 2:26

kyreddy

1-Aug-07 2:26

Thank you very much Martin its working.

Re:Disabling maximising form by doubleclicking on winform header

Martin#1-Aug-07 2:27

Martin#

1-Aug-07 2:27

You are wellcome!

All the best,

Martin

Re:Disabling maximising form by doubleclicking on winform header

MSilviu1-Aug-07 2:37

MSilviu

1-Aug-07 2:37

If you talking about C# you do not need API for this, just set to false the MaximizeBox property for the Form object. Wink | ;)

TreeView expand

collapo1-Aug-07 0:22

collapo

1-Aug-07 0:22

I've a simple function:

<code>
private void BuildTree()
{
TreeNode rootNode = new TreeNode("Root");

TreeNode node1 = new TreeNode("Child 1");
TreeNode node11 = new TreeNode("Child 11");
TreeNode node12 = new TreeNode("Child 12");
node1.Nodes.Add(node11);
node1.Nodes.Add(node12);
rootNode.Nodes.Add(node1);

TreeNode node2 = new TreeNode("Child 2");
rootNode.Nodes.Add(node2);
TreeNode node3 = new TreeNode("Child 3");
rootNode.Nodes.Add(node3);

treeView1.Nodes.Add(rootNode);

if (!rootNode.IsExpanded)
{
rootNode.Expand();
}
}
</code>
My problem is:

If I create a new Winforms application, the expand function does its work, but if the same function is written into a .dll where the treeview is on a usercontrol, expand does nothing. I mean the node doesn't expands so I have to click on '+' to do it.
I use the same function at each time.
Any guess?

Peter Kovacs
collapo

Re: TreeView expand

Robert Rohde1-Aug-07 0:48

Robert Rohde

1-Aug-07 0:48

Just a guess but the difference may be at what point you call this function. Probably your test app already shows the treeview when calling the function while your usercontrol calls the function before the tree is visible.
I don't think it has anything to do with the user control as I already used Expand on TreeViews within user controls.

Robert

Re: TreeView expand

collapo1-Aug-07 1:16

collapo

1-Aug-07 1:16

The treeview is shown in initializecomponents in both project, if I'm not mistaken, therefore that can not be the problem. The function is called right after Initializecomponents(), so it is called "at the same time".
But anyway thanks, I'm waiting for others.

And the winform application is not a test, but a paralell application.

Peter

ConnectionString

M Riaz Bashir1-Aug-07 0:05

M Riaz Bashir

1-Aug-07 0:05

Hi,

I am using MSACCESS database which is belonged with password. and I need to know that how do I create connection string?

Thanks in Advance

Re: ConnectionString

il_masacratore1-Aug-07 0:14

il_masacratore

1-Aug-07 0:14

Visit this link

http://www.connectionstrings.com/?carrier=access

Visit my blog at http://dotnetforeveryone.blogspot.com/

Re: ConnectionString

M Riaz Bashir1-Aug-07 0:23

M Riaz Bashir

1-Aug-07 0:23

Thank you Mr. il_masacratore

memory problem with releasing excel object

S Palip31-Jul-07 23:45

S Palip

31-Jul-07 23:45

Hi,

The following is the code i used to create, write to and save an excel file. Everything goes fine except there is a delay in releasing the object. Yes it persists till the application is closed. Sometimes i'm able still see the excel.exe in the task manager even after the application is closed. Is there any way to overcome this.

I've added a reference to excel 11.0 com component.

private void CreateExcel()
{
Excel.Application ExcelApp = null;
Excel._Workbook ExcelWorkbook = null;
Excel._Worksheet ExcelWorkSheet = null;
string strSavePath = "";
try
{
ExcelApp = new Excel.Application();
ExcelApp.Visible = false;
ExcelWorkbook = (Excel._Workbook)(ExcelApp.Workbooks.Add(Type.Missing));

ExcelWorkSheet = (Excel._Worksheet)ExcelWorkbook.Sheets["Sheet1"];
// ExcelWorkSheet.Name = "My Sheet";

//Make sure Excel is visible and give the user control
//of Microsoft Excel's lifetime.
ExcelApp.Visible = false;
ExcelApp.UserControl = false;

/*********************/
DataSet dsData = MyDataLayer.GetDataSet("Select top(3) from XXXX");

if (dsData != null && dsData.Tables.Count > 0)
{
// the writing process
ExcelWorkSheet.Cells[iRowIndex, iColumnIndex] = data;

}
/*********************/
//ExcelWorkSheet.get_Range("A3", "F3").HorizontalAlignment =
//Excel.XlHAlign.xlHAlignCenter;

//ExcelWorkSheet.get_Range("A1", "A1").Font.Bold = true;
ExcelWorkSheet.Visible = Excel.XlSheetVisibility.xlSheetVisible;
ExcelWorkSheet.Activate();
ExcelWorkSheet.get_Range("A3", "F3").EntireColumn.AutoFit();
//ExcelWorkSheet.get_Range("E1","E1").Columns.EntireColumn.NumberFormat = "£###,###,##0.00";

strSavePath = Application.ExecutablePath.ToString();
strSavePath = strSavePath.Substring(0, strSavePath.LastIndexOf("\\"));
strSavePath = strSavePath + "\\TestExcelFile.xls";

ExcelWorkbook.SaveAs(strSavePath, Excel.XlFileFormat.xlExcel7, Type.Missing, Type.Missing, Type.Missing,
Type.Missing, Excel.XlSaveAsAccessMode.xlNoChange, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
// ExcelWorkbook.Close(false, strSavePath, null);

// return;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
if (ExcelWorkSheet != null)
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(ExcelWorkSheet);
ExcelWorkSheet = null;
}

if (ExcelWorkbook != null)
{
ExcelWorkbook.Close(false, strSavePath, null);
System.Runtime.InteropServices.Marshal.ReleaseComObject(ExcelWorkbook);
ExcelWorkbook = null;
}

if (ExcelApp != null)
{
ExcelApp.Quit();
System.Runtime.InteropServices.Marshal.ReleaseComObject(ExcelApp);
ExcelApp = null;
}
}
finally
{
if (ExcelWorkSheet != null)
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(ExcelWorkSheet);
ExcelWorkSheet = null;
}

if (ExcelWorkbook != null)
{

ExcelWorkbook.Close(false, strSavePath, null);
System.Runtime.InteropServices.Marshal.ReleaseComObject(ExcelWorkbook);
ExcelWorkbook = null;
}

if (ExcelApp != null)
{
ExcelApp.Quit();
System.Runtime.InteropServices.Marshal.ReleaseComObject(ExcelApp);
ExcelApp = null;
}

//GC.WaitForPendingFinalizers();
}

GC.Collect();
}

Thanks,

PLS Smile | :)

Re: memory problem with releasing excel object

Robert Rohde1-Aug-07 0:52

Robert Rohde

1-Aug-07 0:52

I have also run into this problem some time ago. The only solution (workaround) I found was to get a list of all running processes (Process.GetProcesses) before creating the Excel.Application instance and then again after the creation to fetch the corresponding process. I then killed this process after being done.
I know this is completely insane but as said I didn't find any other solution.

Robert

FolderBrowserDialog

Try31-Jul-07 23:21

Try

31-Jul-07 23:21

Hi All,

I am using FolderBrowserDialog in my application. FolderBrowserDialog have RootFolder Property, where it gets or sets the root folder where the browsing starts from. But we can assign only SpecialFolder to RootFolder.
Is it possible to assign user specified folders other than special folders?

Is there any other dialog where we can achieve this?

Thanks in advance.

Re: FolderBrowserDialog

Stefan Troschuetz1-Aug-07 1:26

Stefan Troschuetz

1-Aug-07 1:26

The SelectedPath property is what you're looking for.

"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cook

www.troschuetz.de

Re: FolderBrowserDialog

Try1-Aug-07 1:29

Try

1-Aug-07 1:29

Thank You. Thank You. Thank You.

Dial a number and play a voice (wav file)

Deviser31-Jul-07 23:19

Deviser

31-Jul-07 23:19

Hi!
I want to dial a number by my modem and play a voice after a person response to the call.
Confused | :confused:

Re: Dial a number and play a voice (wav file)

Malcolm Smart1-Aug-07 2:48

Malcolm Smart

1-Aug-07 2:48

why?

Check out this thread....(not a CP thread though)

http://www.velocityreviews.com[^]

Just type dial number modem C# into google. It's quicker than posting here believe it or not.

"More functions should disregard input values and just return 12. It would make life easier." - comment posted on WTF

Sorting columns in a DataGridView

auloepid31-Jul-07 23:19

auloepid

31-Jul-07 23:19

Hi,
(thanks for all the help in the past)
I'm trying to sort a column in a DataGridView. I know it does this automatically, but I'm trying to sort the column so that the cell containing a specific text (Exception) is always at the top.

'Exception' is does not come first alphabetically in the grid.

Is there any way of getting around this?

God Bless

Deji

Serialize WinForms

SakthiSurya31-Jul-07 23:10

SakthiSurya

31-Jul-07 23:10

Hi,

When i tried to serialize WinForms, i got SerializationException, Though i

the attribute [Serializable()] is added .

Please help me to serialize a form object.

With Thanks,
Sakthi.

Re: Serialize WinForms [modified]

Martin#1-Aug-07 0:03

Martin#

1-Aug-07 0:03

Hello,

You really have to provide more information.
The exception message would be of great help.

Maybe one of the public fields in your class is not serializable.
Have you looked at the articles (like this[^]) here on the forum?

Hope it helps!

-- modified at 7:31 Wednesday 1st August, 2007

Here, an article for serializing WinForms[^]

All the best,

Martin

Re: Serialize WinForms

Pete O'Hanlon1-Aug-07 1:16

Pete O'Hanlon

1-Aug-07 1:16

You can't serialize a winform in it's entirety because several of the Form members are not serializable.

Deja View - the feeling that you've seen this post before.

Screensaver software development

Identity Undisclosed31-Jul-07 22:18

Identity Undisclosed

31-Jul-07 22:18

Hi,

I am at the final stage of developing an application which allow user to create a screensaver from images(gif,bmp or jpg). The images are loaded at run-time. Now how can I integrate these as embedd in the new exe ? Is there a way I can do it ?

Currently, I am loading the images from the path. The screensaver(scr) is developed by renaming the exe file to scr and moved to windows/system32 folder. This works very fine under windows vista. However, windows xp does not display any image with this implementation. Any help here ?

Thanks.

"C makes it easy to shoot yourself in the foot. C++ makes it
harder, but when you do, it blows away your whole leg."
- Bjarne Stroustrup

Re: Screensaver software development

MarkB77731-Jul-07 23:43

MarkB777

31-Jul-07 23:43

Can you not just add the picture files in the resource manager (double click the Resources.resx file) and mark them as "Embedded at runtime" (Under the "Persistance" property)?

The picture files are integrated into the .exe this way and you can call the files in your code using Properties.Resources.FileName;

Mark.

Re: Screensaver software development

Identity Undisclosed1-Aug-07 0:07

Identity Undisclosed

1-Aug-07 0:07

I am adding images at run-time. So I cannot do this since it is done at compile time.

"C makes it easy to shoot yourself in the foot. C++ makes it
harder, but when you do, it blows away your whole leg."
- Bjarne Stroustrup

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.