C# Discussion Boards - CodeProject

Heath Stewart11-Nov-04 6:34

11-Nov-04 6:34

Impersonating an interactive user account (or anything but SYSTEM) disables "Allow service to interact with desktop") because it's already assumed that the user is an interactive user (to be an interactive user, they must have the SE_INTERACTIVE_LOGON_NAME right).

This posting is provided "AS IS" with no warranties, and confers no rights.

Software Design Engineer
Developer Division Sustained Engineering
Microsoft

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CLR access policy for a C# control

fridtjof10-Nov-04 8:04

fridtjof

10-Nov-04 8:04

Hi,

i'm a .NET newbie and hope someone can help me. I try to build something like an applet (Java) with C# and .NET. I've been told this can be done by a windows forms control assembly embedded in a html page via the well known <object> tag. Indeed, everything works fine except the control's database access to a local database. Here i get the exception "SQLClientPermission denied". I'm sure the problem lies in the CLR access policies for the code of the embedded control (coming from the intranet zone). Can anyone tell me how to grant this SQLClientPermission to the code of my control?

Thanks for your help,
Fridtjof

Re: CLR access policy for a C# control

Judah Gabriel Himango10-Nov-04 8:22

Judah Gabriel Himango

10-Nov-04 8:22

Control Panel->Administrative Tools->Microsoft .NET Framework 1.1 Wizards->Trust an Assembly

Any remotely useful information on my blog will be removed immediately.

There are 10 kinds of people in the world. Those who have heard of the ubiquitous, overused, worn-out-like-an-old-shoe binary "joke" and those who haven't.
Judah Himango

Re: CLR access policy for a C# control

Nick Parker10-Nov-04 8:23

Nick Parker

10-Nov-04 8:23

I would suggest you check into Code Access Security[^] (part of the .NET Framework Developer's Guide). Using the .NET Framework 1.1 snap-in for the Microsoft Management Console, you can evaluate what permissions apply to a particular assembly under the "Runtime Security Policy" and then selecting "Evaluate Assembly". Within the security policy section you are able to make many other changes as well as adjusting the security zone and increasing the level of trust for a particular assembly. This should get you started.

- Nick Parker
My Blog | My Articles

Dynamic user controls

HectorB10-Nov-04 7:46

HectorB

10-Nov-04 7:46

Hello.
I have a web C# project with a form with 3 buttons and 3
placeholders, each placeholder contains a Web User Control,
when I click over button 1 it shows the data of WUC1, when
I click over button 2 it shows the data of WUC2 and when I
click over button 3 it shows the data of WUC3. My solution
was to make initially invisible the 3 placeholders and when
a button is clicked then I made visible the corresponding
placeholder, as the following code from button 1 shows:

this.PlaceHolder1.Visible = true;
this.PlaceHolder2.Visible = false;
this.PlaceHolder3.Visible = false;

This works well, but I think it's not too eficient to have
loaded the 3 WUCs, so I'm trying to make a dynamic load of
each WUC depending the button clicked, example of button 1:

private void btn1_Click(object sender,
System.EventArgs e){
this.PlaceHolder1.Controls.Clear();
this.PlaceHolder2.Controls.Clear();
this.PlaceHolder3.Controls.Clear();
this.PlaceHolder1.Controls.Add(LoadControl("WUC1.ascx"));
//Only load the WUC1
}

This code load well the WUCs, show the data, but it can't
execute the events of the WUCs, because in each WUC I have
buttons that perform some operations and this events don't
execute, i put a breakpoint and show that the page_load of
the page that contains the WUCs, I think it's a problem of
dynamic load of controls, any idea would be appreciated.
Thanks a lot.

Re: Dynamic user controls

Nick Parker10-Nov-04 8:10

Nick Parker

10-Nov-04 8:10

This question belongs in the ASP.NET forum[^].

- Nick Parker
My Blog | My Articles

destroy dll

ppp00110-Nov-04 7:15

ppp001

10-Nov-04 7:15

Hi all,

After I loaded a dll component(c#)and use it in the program,
how can I destroy it(remove it from memory) in C# ?

Thanks

Re: destroy dll

Nick Parker10-Nov-04 7:28

Nick Parker

10-Nov-04 7:28

You will need to load the assembly into another AppDomain[^] and then use the static method AppDomain.Unload to remove it when you are done.

- Nick Parker
My Blog | My Articles

Conditional Attributes

Kevin McFarlane10-Nov-04 5:27

Kevin McFarlane

10-Nov-04 5:27

I have this code in a C# class library

        [Conditional("DBC_CHECK_ALL")]<br />
        public static void Assert(bool assertion)<br />
        {<br />
            ExceptionAssert(assertion);<br />
            TraceAssert(assertion);<br />
        }<br />
        <br />
        [Conditional("DBC_USE_EXCEPTIONS")]<br />
        static void ExceptionAssert(bool assertion)<br />
        {<br />
            if (!assertion)	throw new AssertionException("Assertion failed.");<br />
        }<br />
<br />
        [Conditional("DBC_USE_ASSERTIONS")]<br />
        static void TraceAssert(bool assertion)<br />
        {<br />
            Trace.Assert(assertion, "Assertion failed.");<br />
        }

which is attempting to implement Anding of attributes as per this topic

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/csref/html/vclrfconditional.asp[^]

However, when I define either or both of DBC_USE_EXCEPTIONS or DBC_USE_ASSERTIONS in a Console app. that uses the library neither ExceptionAssert nor TraceAssert gets called.

Note: when all this is done within a single console app. it works OK.

Kevin

Monitor Problem

waiwai0910-Nov-04 3:18

waiwai09

10-Nov-04 3:18

In .NET Compact Framework, System.Threading.Monitor.Wait(Object obj) and
System.Threading.Monitor.Pulse(Object obj) are not available. Does anyone know to use these functions or replace by other functions in .NET Compact Framework? Really Thanks a lot!!!!!

Pathfinding (path or no path) in 3D

Sebastian Schneider10-Nov-04 3:04

Sebastian Schneider

10-Nov-04 3:04

Hi everybody,

now for something completely different Wink | ;)

I just read an article on pathfinding here on CP(http://www.codeproject.com/csharp/CSharpPathfind.asp) but it did not really get me started as I am too dumb to convert this to 3D Wink | ;)

MY PROBLEM:

I have to write a program which checks if there is a path through a threedimensional cube, which consists of smaller cubes (scubes)

The cube dimensions are fixed (20x20x20 scubes) and each scube may be filled or void.

The is one variable, p, which determines the probability of a scube being filled (p) or being a void (1-p). This does not change as we iterate through the scubes on startup.

I have this cube ready to go and should now determine if there is a path from the top side to the bottom side.

Movement Rule: No Diagonal Moves, only along the three axis.

I smell recursion here, but I can't figure out how to do this Smile | :)

If I had some Lego(tm) here, I might have BUILT a cube and found a solution, but right now all I have is one sheet of paper and a pencil.

Can anyone get me back on track?

Cheers
Sid

Find and replace in text file

sevan10-Nov-04 2:12

sevan

10-Nov-04 2:12

find string Expire and change the first two lines after Expire to Code project
example

Expire
12345
23423 cool

To
Expire
Code project
Code project

thx

Re: Find and replace in text file

Dave Kreskowiak10-Nov-04 3:27

Dave Kreskowiak

10-Nov-04 3:27

So, what's the qustion? And, no, we're not going to write the code for you. If you're having a problem with the logic or some code issue, we can help with that. But don't expect anyone to write the whole thing for you.

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

Re: Find and replace in text file

tom_dx10-Nov-04 12:39

tom_dx

10-Nov-04 12:39

I recommend looking up, 'String'

IM PROUD TO BE A GMAIL;

Re: Find and replace in text file

Dave Kreskowiak10-Nov-04 13:37

Dave Kreskowiak

10-Nov-04 13:37

I recommend telling the person who originally posted the question, not me...

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

Re: Find and replace in text file

Kraki11-Nov-04 9:06

Kraki

11-Nov-04 9:06

I would suggest looking at the System.Text.RegularExpression namespace and use a regular expression to do the replacement.

Is there a way to prevent InitializeComponent() regeneration?

DizzyMobile10-Nov-04 1:26

DizzyMobile

10-Nov-04 1:26

Hi! I’m working on a simple Windows.Forms database project. It would be nice for me to work with DataGrid (set properties & behavior of its elements) mostly via designer. Before setting DataSource & DataMember of the DataGrid I need to fill relative dataset with data. For that purpose I call myDataAdapter.Fill method.
The question is: Where can I paste myDataAdapter.Fill method to get filled DataGrid in the designer?
I’ve tried to put fill method in InitializeComponent, but designer recreates this section every time I change any property with it. Putting fill method somewhere in myForm constructor takes no effect on the designer. So maybe there is an attribute saying [no recreate] to mark constant section of designer region?
Thanks!

Dizzy

Re: Is there a way to prevent InitializeComponent() regeneration?

Skynyrd10-Nov-04 5:26

Skynyrd

10-Nov-04 5:26

I might be wrong but I'm practically sure u can't make a DataGrid's databinding "active" in design time.

Re: Is there a way to prevent InitializeComponent() regeneration?

J4amieC10-Nov-04 5:34

J4amieC

10-Nov-04 5:34

As long as the dataset exists and the datagrid's datasource property is set, filling the dataset in the c.tor has always worked for me... maybe paste some code (including your initializecomponent method) and it would be easier to see your problemo.

Re: Is there a way to prevent InitializeComponent() regeneration?

DizzyMobile10-Nov-04 8:35

DizzyMobile

10-Nov-04 8:35

So, there is no special attribute for designer region. That’s ok. Maybe I've pasted fill method to the wrong constructor.
Let’s simplify my question, so there is no need to paste a lot of code.
Now I have a form & a button. There is my form constructor.

public Form1()<br />
{<br />
    InitializeComponent();<br />
    this.button1.BackColor = Color.Red; // This line has no effect in the designer<br />
}<br />

Initialize component is fully generated by designer and not takes a point of interest for us.
Please help me. In which class constructor I've to paste "this.button1.BackColor = Color.Red" to have colored button in the designer?

Dizzy

Re: Is there a way to prevent InitializeComponent() regeneration?

Skynyrd10-Nov-04 9:47

Skynyrd

10-Nov-04 9:47

As far as I know, you cant create any method that the designer will run when creating a new instance of the control/component. It only does that with InitializeComponent() and it must be hardcoded because the method doesnt have any Atribute to tell the designer to run it in design time.

The only way u might be able to achieve what I think you want is creating some Browsable Get/Set property and putting the DataSet binding code in the setter. Then create a new form inheriting from the one u just created and go back to the designer and change the derived form's property. That should run whatever code you want.

Haven't tested it, but it should work. I dont know what the use in doing this is unless u want to get a better idea in design time how ur DataGridStyle is looking when displaying data but Confused | :confused:

...if thats the case, once it looks good just copy all generated code to ur original form and ur set.

override WndProc allow form resize, move, max and min

Lyhr10-Nov-04 0:51

Lyhr

10-Nov-04 0:51

How can I allow the Form to only do paint and move, resize, maximize and minimize events? I have the code for paint below.

private const int WM_NCPAINT = 0x0085;
private const int WM_PAINT = 0x000F;
private const int WM_ERASEBKGND = 0x0014;
private const int WM_PRINTCLIENT = 0x0318;

[SecurityPermission(SecurityAction.LinkDemand, UnmanagedCode=true)]
protected override void WndProc(ref Message m)
{
if (this.Buzy)
{
if (!((m.Msg == WM_PAINT) || (m.Msg == WM_NCPAINT) || (m.Msg == WM_ERASEBKGND) || (m.Msg == WM_PRINTCLIENT)))
{
return;
}
base.WndProc(ref m);
}

Re: override WndProc allow form resize, move, max and min

Jay Shankar10-Nov-04 19:36

Jay Shankar

10-Nov-04 19:36

try this:

private bool allowPaint = false;

protected override void OnPaint(PaintEventArgs e)
{
	if(this.allowPaint)
	{
		base.OnPaint (e);
	}

	this.allowPaint = false;
}

protected override void OnResize(EventArgs e)
{
	this.allowPaint = true;

	base.OnResize (e);
}

protected override void OnMove(EventArgs e)
{
	this.allowPaint = true;

	base.OnMove (e);
}

Get ID of resource

El'Cachubrey10-Nov-04 0:50

El'Cachubrey

10-Nov-04 0:50

Hi
I had an resorce in my Assembly (Bitmap) and need to get resource ID of one, for pass to an function.How i can do this??
Please help!!!

Re: Get ID of resource

Heath Stewart10-Nov-04 8:35

Heath Stewart

10-Nov-04 8:35

There's no resources IDs like with native images - they have the name that you gave them when you compiled your assembly.

To get a list of the names, use Assembly.GetManifestResourceNames. To actually get the stream, use Assembly.GetManifestResourceStream.

This posting is provided "AS IS" with no warranties, and confers no rights.

Software Design Engineer
Developer Division Sustained Engineering
Microsoft

[My Articles] [My Blog]

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