Re: Questions about Kernel32.dll's Beep() - C# Discussion Boards

How do we know which rows got deleted in DataTable?

rudy.net15-Jul-05 20:09

15-Jul-05 20:09

I have a method in a class that updates an xml file based on an input parameter which is a DataTable.
To update my xml file I use the DataTable methods

 <br />
GetChanges(DataRowState.Modified)<br />
GetChanges(DataRowState.Added)<br />
GetChanges(DataRowState.Deleted)<br />

The problem is that when I call GetChanges(DataRowState.Deleted) I do get a datatable of the rows that were deleted but all I can access is the number of rows but not the row contents so I can't figure out which rows were deleted.

Any help appreciated in advance.

Re: DataGrid's row Color Change

rudy.net15-Jul-05 20:16

rudy.net

15-Jul-05 20:16

See following link: http://www.codeproject.com/csharp/custom_datagridcolumnstyl.asp[^]

Re: DataGrid's row Color Change

rudy.net16-Jul-05 10:12

rudy.net

16-Jul-05 10:12

The only way I could think of doing it is by having a method that when called to set a row color, the method loops through each item in that row and sets the color.

using custom actions

sianatia15-Jul-05 19:13

sianatia

15-Jul-05 19:13

hi,

i want to use a custom action in my deployment project conditionaly but it does not work even when i use the custom action unconditionaly,
let me know how to activate the custom action?

thanks

Load rtf file into a richtextbox while retaining format information

sparks_lu15-Jul-05 12:58

sparks_lu

15-Jul-05 12:58

I am trying to load an rtf file which is created by using Wordpad into a richtextbox. However, the text seems lost some of its format information, e.g. text set to bold and different sizes, after been loaded into the richtextbox. How can I add these texts while retaining their format properties?

Re: Load rtf file into a richtextbox while retaining format information

Dave Kreskowiak15-Jul-05 17:13

Dave Kreskowiak

15-Jul-05 17:13

The RTB control doesn't support all of the formatting that Wordpad or Word saves into their RTF files.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Questions about Kernel32.dll's Beep()

Lord Kixdemp15-Jul-05 11:52

Lord Kixdemp

15-Jul-05 11:52

OK, I have 2 questions about this function:

1. Why does this function stop working? On one machine (WinXP), this happened already, it won't beep. On another computer (WinXP also), it beeped fine until today that I loaded my project and tried it... I put that same project on another computer (Win2k) and it worked fine, so I grabbed its Kernel32.dll, renamed it, and then put it on the second PC I listed, but the program crashes, it returns to VS.NET without any exception message and then it puts the cursot on the "public static extern bool Beep();" line... How can I fix this? I really need this function! Frown | :(

2. I used to code in a Windows scripting language that did all the datatype conversion stuff for you (http://www.autoitscript.com), and when I called the Beep function with decimal parameters, it worked, but when I try floats, doubles, and decimals in C# it doesn't beep!

If anyone can help, I'd be thankful for life! Thanks! Wink | ;)

Darth_Sulfur (Sulfurik)
http://www.SulfurSoft.tk
ftp://tsfc.ath.cx
http://tsfc.ath.cx
hotline://tsfc.ath.cx

Re: Questions about Kernel32.dll's Beep()

Rob Graham15-Jul-05 12:50

Rob Graham

15-Jul-05 12:50

Is the PC speaker enabled? (Bios and Control panel) Does it work?

(Sometimes it really is a hardware problem Smile | :)

)

BTW, copying Kernel32.dll from one OS to another really is a bad idea...

Absolute faith corrupts as absolutely as absolute power
Eric Hoffer
The opposite of the religious fanatic is not the fanatical atheist but the gentle cynic who cares not whether there is a god or not.
Eric Hoffer

Re: Questions about Kernel32.dll's Beep()

Dave Kreskowiak15-Jul-05 17:12

Dave Kreskowiak

15-Jul-05 17:12

I agree with Ron. Either you've got a hardware problem, or someone turned the volumn down on the speakers or in the Sound control panel or the little Volume slider, or muted either.

And yeah, copying Kernel32.dll from another machine is a REALLY bad idea. If you replaced with one in System32, it's amazing your machine even booted!

BTW: Beep takes two parameters: unsigned integers, NOT floats, doubles, decimals, ... floating point numbers will not work. The proper DllImport should look like this:

static extern bool Beep(uint dwFreq, uint dwDuration);

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Re: Questions about Kernel32.dll's Beep()

leppie15-Jul-05 22:11

leppie

15-Jul-05 22:11

I disconnected my PC speaker in case (actually I ripped it out completely) and my PC doesnt beep either.

^{xacc-ide 0.0.15 now with C#, MSIL, C, XML, ASP.NET, Nemerle, MyXaml and HLSL coloring - Screenshots}

Re: Questions about Kernel32.dll's Beep()

Lord Kixdemp16-Jul-05 7:45

Lord Kixdemp

16-Jul-05 7:45

OK, what's the option in Control Panel, and what's the BIOS option usually called? I can't find 'em! Frown | :(

Thanks!

Darth_Sulfur (Sulfurik)
http://www.SulfurSoft.tk
ftp://tsfc.ath.cx
http://tsfc.ath.cx
hotline://tsfc.ath.cx

Re: Questions about Kernel32.dll's Beep()

Rob Graham16-Jul-05 12:29

Rob Graham

16-Jul-05 12:29

On XP:
MyComputer->manage->device manager

select the view menu and check (select) "show hidden devices"

expand the "non-plug and paly devices" node of the tree.

find "beep" and open its properties window. ensure it is enabled. (I hate the thing, mine is disabled)

Different BIOS will have differen places (or sometimes none at all) for this.

also, sttings->control panel -> sounds and audio devices: sounds tab - make sure the sounds scheme is not 'no sounds'. Make sure some sound is associated with 'default beep' On the volume tab, make sure 'mute' is not checked..

Absolute faith corrupts as absolutely as absolute power
Eric Hoffer
The opposite of the religious fanatic is not the fanatical atheist but the gentle cynic who cares not whether there is a god or not.
Eric Hoffer

Re: Questions about Kernel32.dll's Beep()

Anonymous18-Jul-05 14:41

Anonymous

18-Jul-05 14:41

Uhh... "Show hidden devices"? Under View? Hmm... I don't have that! :S I have XP Home with SP2... Is there an alternative? Thanks! Wink | ;)

Inheriting from Constraint ???

Besinci15-Jul-05 10:58

Besinci

15-Jul-05 10:58

Hi there,

Can anyone supply me with code sample on this issue???

...
...

public class Constraint : System.Data.Constraint
{
public Constraint() : base()
{
}
}

When compiling the code I get these error messages:

'DataBase.Constraint' does not implement inherited abstract member 'System.Data.Constraint.CanBeRemovedFromCollection(System.Data.ConstraintCollection, bool)'

'DataBase.Constraint' does not implement inherited abstract member 'System.Data.Constraint.CanEnableConstraint()'

'DataBase.Constraint' does not implement inherited abstract member 'System.Data.Constraint.CheckCanAddToCollection(System.Data.ConstraintCollection)'

'DataBase.Constraint' does not implement inherited abstract member 'System.Data.Constraint.CheckConstraint(System.Data.DataRow, System.Data.DataRowAction)'

'DataBase.Constraint' does not implement inherited abstract member 'System.Data.Constraint.CheckState()'

'DataBase.Constraint' does not implement inherited abstract member 'System.Data.Constraint.Clone(System.Data.DataSet)'

'DataBase.Constraint' does not implement inherited abstract member 'System.Data.Constraint.ContainsColumn(System.Data.DataColumn)'

'DataBase.Constraint' does not implement inherited abstract member 'System.Data.Constraint.IsConstraintViolated()'

'DataBase.Constraint' does not implement inherited abstract member 'System.Data.Constraint.Table.get'

I don't know how to implement these members... pls help Cry | :((

Re: Inheriting from Constraint ???

leppie15-Jul-05 22:13

leppie

15-Jul-05 22:13

Besinci wrote:
I don't know how to implement these members... pls help

Why are you inheriting then? What is your goal with this? I suggest you read MSDN docs for the Constraint class. D'Oh! | :doh:

^{xacc-ide 0.0.15 now with C#, MSIL, C, XML, ASP.NET, Nemerle, MyXaml and HLSL coloring - Screenshots}

Printing to debug window from Web Service

maskeen15-Jul-05 10:41

maskeen

15-Jul-05 10:41

Hi,

How can I print to debug window from a C# Web Service?

Thanks!

My Article Updated

Ahmed Erarslan15-Jul-05 10:21

Ahmed Erarslan

15-Jul-05 10:21

Hello There My Article Updated I soluted Soruce code Problem

Ahmed Erarslan
MCAD,MCDBA,MCP

MCSD.NET

Re: My Article Updated

Judah Gabriel Himango15-Jul-05 10:36

Judah Gabriel Himango

15-Jul-05 10:36

Ahmed, perhaps a link to your article would be helpful, along with a description of your article.

Also, the C# forum is not the best location to post this.

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Homosexuality in Christianity
Judah Himango

Re: My Article Updated

Dave Kreskowiak15-Jul-05 17:05

Dave Kreskowiak

15-Jul-05 17:05

You call that updated? You still aren't explaining anything your code is doing or why. It's still just a bunch of barely related code snippets, nothing more.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Re: My Article Updated

Yulianto.15-Jul-05 18:07

Yulianto.

15-Jul-05 18:07

How to improve your article.[^]

<italic>Work hard, Work effectively.

Search a treeView

Anonymous15-Jul-05 8:46

Anonymous

15-Jul-05 8:46

Guys, Gals
I can't find any info on how to search a treeView, basically I'm dreaming big and would like to find a way that as a user types in the textbox the search method scrolls thru the treeView to find the matching string of text... ie like you see in a windows help search.
any ideas,

Re: Search a treeView

Judah Gabriel Himango15-Jul-05 9:39

Judah Gabriel Himango

15-Jul-05 9:39

Use a recursive function or a while loop to search through all the nodes in a treeview. When you find a matching TreeNode, call EnsureVisible() or some other function to make the treeview scroll down to it.

FindMatchingNode("http://judahgabriel.blogspot.com", this.treeView1.Nodes);

void FindMatchingNode(string text, TreeNodeCollection nodes)
{
    foreach(TreeNode node in nodes)
    {
        if(node.Text.IndexOf(text) != -1)
        {
             node.EnsureVisible();
             break;
        }
        else FindMatchingNode(text, node.Nodes); // recursively search this node's children
    }
}

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Homosexuality in Christianity
Judah Himango

Re: Search a treeView

Anonymous15-Jul-05 11:15

Anonymous

15-Jul-05 11:15

Cool, Much thanks
but....
i can't seem to get it to highlight the node once it finds it....
???

Re: Search a treeView

Joel Lucsy15-Jul-05 16:41

Joel Lucsy

15-Jul-05 16:41

Try setting the SelectedNode to the node you want selected. Also note that if you have HideSelection set to true that it won't show the selection if the tree doesn't have focus.

--
Joel Lucsy

Number TextBox

Kamrul Hasan15-Jul-05 8:22

Kamrul Hasan

15-Jul-05 8:22

Can Some help me to make a textbox in which user can type only numerical or Uppercase charecters ?

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