C# Discussion Boards - CodeProject

John Fisher6-Sep-05 4:53

6-Sep-05 4:53

This may not fit with the parameters of your application design, but the examples show the Fill command being executed before the Update. (So you could move the Fill command to the top of your btnCommit_Click function.)

Also, for this type of problem, it is far more likely that you will get valuable help if you provide a detailed error message in your post. Smile | :)

John

"You said a whole sentence with no words in it, and I understood you!" -- my wife as she cries about slowly becoming a geek.

Unload DOM

ksanju10006-Sep-05 1:28

ksanju1000

6-Sep-05 1:28

Hi I need to free the memory occupied by xml document.
I tried to use this code inside button
XmlDocument xmldoc = new XmlDocument();
xmldoc.Load("c:/a.xml");

you can check for memory performance in windows task manager
I have already made one project The problem is coming in this xml loading
every time its creatting own instance and incraeasing the memory.
If any one has any idea to free momory
if some one give me example of relasing momory
thanks

Re: Unload DOM

John Fisher6-Sep-05 5:21

John Fisher

6-Sep-05 5:21

Could you explain the setup a little more? The .NET Framework's garbage collection usually handles these things quite nicely. Unless you are loading many XML documents and keeping references to them (so the garbage collector thinks you still need them), you shouldn't have any problems.

As a side note, if you are processing many XML documents, and using them in a read-only fashion. You can gain performance by using either XmlReader or XPathDocument. (I prefer XPathDocument.)

John

"You said a whole sentence with no words in it, and I understood you!" -- my wife as she cries about slowly becoming a geek.

Re: Unload DOM

ksanju10006-Sep-05 20:35

ksanju1000

6-Sep-05 20:35

Hi John,
In my project every time XML file is loaded and read thr Xml reader but when the form is closed it should be freed by memory but it does not happen its due to XmlDocument
I just for example tried to do inside the button i want that after pressing the button it should load and free the memory occupied by processor.

Do you have any idea you can tell me in class to load the XMlDocument and Unload XmlDocument
Thanks
sanjeev

Re: Unload DOM

John Fisher7-Sep-05 4:09

John Fisher

7-Sep-05 4:09

It sounds like you are watching some sort of Windows memory tool (like TaskManager). This is not an accurate way to analyze memory usage in the .NET Framework. (It does not instantly free memory when you quit using a variable.) Read a few articles like this[^], and you'll have a better understanding of the real behavior of garbage collection in the .NET Framework.

John

"You said a whole sentence with no words in it, and I understood you!" -- my wife as she cries about slowly becoming a geek.

Web Services in VS 2003

seee sharp6-Sep-05 1:22

seee sharp

6-Sep-05 1:22

Hi,

I have written a web service and need to connect to that using win form. In Visual Studio 2003, when I try to add web reference using LAN IP, it works. But if I use internet IP for the same service/server/IIS/machine, Visual Studio gives a prompt for "Discovery Credential For Proxy Server".
What I need to provide there, or how can I get rid of this, please help.

- ashish

Richetextbox problem again

snouto6-Sep-05 1:13

snouto

6-Sep-05 1:13

Hello dudes ?
I have another problem i use richtextbox to edit some text but i don't know how to insert multiple lines of text in that richtextbox but i need each line with its specific font and color attributes i used this code my friend gave me here is the code

<br />
string message = "Snouto : " + textBox1.Text;<br />
			richTextBox1.Text += message + "\r\n";<br />
			int pos = 0;<br />
			while(pos < richTextBox1.TextLength)<br />
			{<br />
				int index = richTextBox1.Find(textBox1.Text,pos,RichTextBoxFinds.None);<br />
				if(index == -1)<br />
					break;<br />
				richTextBox1.Select(index,textBox1.Text.Length);<br />
				richTextBox1.SelectionFont = fontDialog1.Font;<br />
				richTextBox1.SelectionColor = colorDialog1.Color;<br />
				pos = index + RichTextBox1.TextLength;<br />
			}<br />
			textBox1.Clear();<br />

but this code when i write one sentence ok it changes its font and color but when i write again the same sentence it changes the color and font of the first sentence to the defaul color and font and then it gives the new same sentence the changes in font and color i need to insert multiple lines of text and give each one color and font without being changed if i inserted again the same sentences what can i do ?
Please help me

Miss With The Best And Die Like The Rest

-- modified at 7:17 Tuesday 6th September, 2005

Re: Richetextbox problem again

S. Senthil Kumar6-Sep-05 1:51

S. Senthil Kumar

6-Sep-05 1:51

That's because you're using Find to find the sentence in the text and it obviously is finding both the first and the new sentence. I'd suggest using another variable to store the *previous* index, looping till the last Find (until index returns -1) and then using the previous index to set the color stuff. Or, if there is something like LastIndexOf, you could use it.

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

Re: Richetextbox problem again

snouto6-Sep-05 2:08

snouto

6-Sep-05 2:08

can you give me simple code for this please

Miss With The Best And Die Like The Rest

Re: Richetextbox problem again

S. Senthil Kumar6-Sep-05 2:46

S. Senthil Kumar

6-Sep-05 2:46

Not compiled or tested, but you'll get the idea.

string message = "Snouto : " + textBox1.Text;
richTextBox1.Text += message + "\r\n";
int pos = 0;
int prevIndex = -1;
while(pos < richTextBox1.TextLength)
{
int index = richTextBox1.Find(textBox1.Text,pos,RichTextBoxFinds.None);
if(index == -1)
break;
prevIndex = index;
pos = index + RichTextBox1.TextLength;
}
index = prevIndex;
richTextBox1.Select(index,textBox1.Text.Length);
richTextBox1.SelectionFont = fontDialog1.Font;
richTextBox1.SelectionColor = colorDialog1.Color;

textBox1.Clear();

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

Base Class problem with forms

Russell Jones6-Sep-05 0:34

Russell Jones

6-Sep-05 0:34

Hi,

I am trying to record the user actions on forms as part of my exception handling.

I've set up a singleton object that records all the control events i'm interested in and it works fine for the single test form. The form registers itself in the constructor and unregisters itself on disposal.

Then i thought i'd be clever and create a base class, let's call it myFormBase. I put the line to register the controls in the constructor:

_controlWatcher.AddForm(this);

ControlWatcher takes an argument of type form, i've also tried type myFormBase, but when i look through the controls for the form I only get the controls present on the base class, not the controls on the actual form i have passed in.

Is there a way round this problem?

Thanks

Russell

Re: Base Class problem with forms

S. Senthil Kumar6-Sep-05 2:00

S. Senthil Kumar

6-Sep-05 2:00

You would need to have them, atleast as abstract properties, in the base class. Something like

abstract class MyFormBase
{
   public abstract TextBox MyTextBox
   {
      get ;
   }
}

class MyForm : MyFormBase
{
   private TextBox textbox = new TextBox();
   public override TextBox MyTextBox
   {
       get { return textbox; }
   }
}

Or if all classes deriving from MyFormBase would have those controls, you can as well declare them in the base class itself.

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

Re: Base Class problem with forms

Russell Jones6-Sep-05 2:33

Russell Jones

6-Sep-05 2:33

I was trying to loop through the controls collection on the form rather than refernce controls directly. I think it was laziness on my part, i'll put a call in each form i create, instead.

Thanks for your help Senthil,

Russ

Threading and Forms

Dani Duran Kenobi6-Sep-05 0:33

Dani Duran Kenobi

6-Sep-05 0:33

I have a newbie question about threading and controls,

I know the rule: "A control can not be accessed from a thread that is not the creator of that control"

But if I create a class which inherits from Form, and add new members which are not controls, can I access those members from any thread?? D'Oh! | :doh:

Thanks in advance

Use the force

Re: Threading and Forms

S. Senthil Kumar6-Sep-05 2:04

S. Senthil Kumar

6-Sep-05 2:04

Yes you can, you need to worry only about accessing/modifying controls. But you might still want to synchronize access to them using the lock statement.

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

Control Problems?

Simon Wren5-Sep-05 23:36

Simon Wren

5-Sep-05 23:36

This is driving us mad, i'll try and keep it simple.

We have a custom control writtten in VB.Net compiled as a class library, this is added as a reference to a C# application, with the control being placed on its form.

They both have the same/similar root namespace eg:

CompanyName.Things.<the thing="">With me so far...the problem is that if at anytime after the component has been referenced the custom control changes, say for example adding a style enum to the control that can be set by designers, the forms that use this control complain about not being able to see the additions.

This is *most* true for our custom properties of the control that can be set by the designer.

Removing and re-referencing the component makes no difference, and of course i am sure the features being added are public available.

It seems (prove me wrong) that once a VB.Net custom control has been added to a C# application you can't make any changes to that custom control! That can't be correct surely.

I don't seem to have this problem if the custom control is written in C#.

Am i mad, what's the problem?

Si

Re: Control Problems?

S. Senthil Kumar6-Sep-05 2:12

S. Senthil Kumar

6-Sep-05 2:12

How are you referencing the VB .NET library? Did you add it by browsing and selecting the dll (binary reference) or by selecting it from the Projects tab (in VS .NET) ? If it is the former and if Copy Local is set to true, then Visual Studio won't watch for modifications to the library, instead, it will simply use the local copy (that's what Copy Local does). My guess is that you added it as a binary reference, whereas for C# controls, you had them in the same project and therefore added them through the Projects tab.

You can try setting Copy Local to false (Right click on the reference in VS .NET, click Properties). Or, if the changes are very infrequent, you can manually copy the library to the C# project's bin/debug directory (or do it as a PreBuild step).

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

Re: Control Problems?

Simon Wren6-Sep-05 2:14

Simon Wren

6-Sep-05 2:14

Yeah its added as a binary reference.

Right i'll get the guys to try your suggestion out, i see what your saying, and thats worth a try.

It does seem to be more when you look at the designer of a form containing the controls, though.

Si

can i access my lan pc from out side lan using remoting

Mayank Chauhan5-Sep-05 23:33

Mayank Chauhan

5-Sep-05 23:33

Hi!!
i m developing one application in which i want to access any pc( stadt alone, lan pc ,behind firewall pc).
what i have done for this is i have created one remoting server that is going to installed on pc which i want to access and i m accessing this remoting server from web serve through remoting client..
This thing is working fine in my internal lan . but when i tried this from out side i m not able to connect to my lan pc..

Waiting for your early reply...
Thanks in advance..

TAB KEY AND DATAGRID CELLS

Greeky5-Sep-05 23:30

Greeky

5-Sep-05 23:30

I have run time generated data table and table style including numerictextboxColumns. I set datatable to datasource of Datagrid1. Before setting datagrids table style, user can move on cells with tab key , after setting table style, when user try to move on datagrid with TAB key, cursor jump 2 cells not one :S

What s problem.

Re: TAB KEY AND DATAGRID CELLS

miah alom6-Sep-05 3:05

miah alom

6-Sep-05 3:05

You will have to override the PreProcessMessage of the DataGridTextBoxColumn and NumericUpDown. There you can control the TAB key. Look for this method in MSDN. If you want I can post some code snippet.

IntPtr usage!

Duong Tien Nam5-Sep-05 23:19

Duong Tien Nam

5-Sep-05 23:19

I have an API function like this:

void theFunc(LP_STRUCT theStructPt);

theStructPt is a pointer to struct STRUCT.
I want to use it in C#, so I have this

[DllImport("myDll.dll", EntryPoint="theFunc")]
public static extern TheFunc(IntPtr theStructPt);

I call the function and the theStructPt pointer point to my required struct now. But I dont know how to convert the memory where theStructPt point to to struct so I can use it. I want something like that:

MyStruct str = (MyStruct) theStructPt;
str.var1 = "hello";
str.var2 = 5;

Anybody help me! Thanks alot

Re: IntPtr usage!

S. Senthil Kumar6-Sep-05 2:17

S. Senthil Kumar

6-Sep-05 2:17

Did you take a look at the Marshal.PtrToStructure method?

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

Re: IntPtr usage!

Daniel Turini6-Sep-05 4:06

Daniel Turini

6-Sep-05 4:06

Duong Tien Nam wrote:
[DllImport("myDll.dll", EntryPoint="theFunc")]
public static extern TheFunc(IntPtr theStructPt);

Did you try this?
public static extern void TheFunc(ref STRUCT theStructPt);

Create new controls in RunTime

liqnit5-Sep-05 22:56

liqnit

5-Sep-05 22:56

Hello
how do i create a new RadioButton in run time?
i getting a list of name would like to create a radiobutton on the form within a panel .

when i try :
RadioButton rbNew = new RadioButton ();

i get

Embedded statement cannot be a declaration or labeled statement<br />

please advice

thanks

Have a nice Day

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