Invalid Parameter used - C# Discussion Boards

itssuk12-Jan-05 1:30

12-Jan-05 1:30

I have a radio button.On click of that radio button ,the text box present should be enabled.

I found that no click event is available for the radio button.

pls help

Sukanya

Re: Create Click event in C#

Paul Lyons12-Jan-05 2:28

Paul Lyons

12-Jan-05 2:28

You should use the CheckedChanged property.

ex:

RadioButton1_CheckedChanged(object sender, System.EventArgs e)
{
   if (RadioButton1.Checked == true)
   {
      TextBox1.Enabled = true;
   }
}

Paul Lyons, CCPL
Certified Code Project Lurker

Re: Create Click event in C#

itssuk12-Jan-05 19:18

itssuk

12-Jan-05 19:18

This did not work

pls suggest something

there is no click event for the server side control

what to do?

Sukanya

Re: Create Click event in C#

Paul Lyons13-Jan-05 15:05

Paul Lyons

13-Jan-05 15:05

Ah ha... You didn't say you were using it on a WebForm. Smile | :)

Have a look at this[^].

Note that the control does not immediately cause the page to post back to the server by default. You need to set the AutoPostBack property to true for an immediate reaction to it's change in state.

Hope this helps you.

Paul Lyons, CCPL
Certified Code Project Lurker

Re: Create Click event in C#

Member 164882912-Jan-05 2:29

Member 1648829

12-Jan-05 2:29

You could use the mouse down event - you can use the MouseEventArgs parameter to test which mouse button was used.

Re: Create Click event in C#

Stefan Troschuetz12-Jan-05 2:35

Stefan Troschuetz

12-Jan-05 2:35

itssuk wrote:
I found that no click event is available for the radio button.

Where did you found that info? The
MSDN topic[^] of the RadioButton lists the Click event and it's also available in the Visual Studio form designer.

www.troschuetz.de

Replacing plus minus signs for TreeView

eliea12-Jan-05 1:23

eliea

12-Jan-05 1:23

I have been trying and looking everywhere for a way to replace the TreeView control default plus and minus signs with customized images. Can it be done?

Elie

Invalid Parameter used

Snowjim12-Jan-05 0:59

Snowjim

12-Jan-05 0:59

Hey!

I have created a Windows Control Library
I have built this and added the dll file to my main project

This workt well, but when i closed and then started upp my main progject again the control was not visible in the form?

And i got the folowing errors (menuPanel1 is my dll control)

C:\ForumProject\ForumClient\ForumClient.cs(324): The variable 'menuPanel1' is either undeclared or was never assigned.

An exception occurred while trying to create an instance of ForumClient.MenuPanel. The exception was "Invalid parameter used.".

But i can run the program and then the control is visible?

I have tryed to rebuild the control and add it to the project, but i get this message when i am draging it to my main form

An exception occured whule trying to creat an instance of Forum.MenuPane. Exception was "Invalid parameter used.".

My construkter in the control looks like this

		public MenuPanel()<br />
		{<br />
			// This call is required by the Windows.Forms Form Designer.<br />
			InitializeComponent();<br />
<br />
		}

and The automated code to create it looks like this

private MenuPanel menuPanel1;<br />
<br />
		private void InitializeComponent()<br />
		{<br />
                        this.menuPanel1 = new MenuPanel();<br />
<br />
			// <br />
			// menuPanel1<br />
			// <br />
			this.menuPanel1.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("menuPanel1.BackgroundImage")));<br />
			this.menuPanel1.Location = new System.Drawing.Point(0, 0);<br />
			this.menuPanel1.Name = "menuPanel1";<br />
			this.menuPanel1.Size = new System.Drawing.Size(272, 568);<br />
			this.menuPanel1.TabIndex = 6;<br />
<br />
			this.Controls.Add(this.menuPanel1);<br />
                }

Ples help me with this

Best Regards
Jimmy

Re: Invalid Parameter used

Snowjim12-Jan-05 3:33

Snowjim

12-Jan-05 3:33

I have mange to fix this problem.

I hade the folowing
Bitmap imageOne = Bitmap.fromfile("tools//pictures//test.bmp");
locataed first in the class and this dident work.

Have changed it to store only the string of the pach, and when the image is needed it will load it.

//Jimmy

drag and drop images

rathishps12-Jan-05 0:38

rathishps

12-Jan-05 0:38

hai friends,
i want to drag an image from one picturebox and drop it on another.i tried it with dragdrop events of pidtureboxes. but it is not working. please any one can help me?
regards,
rathish D'Oh! | :doh:

Handle Bitmaps faster?

Snowjim12-Jan-05 0:35

Snowjim

12-Jan-05 0:35

Hey

I am developing a simple Client program and i have made an Windows Control Library(DLL file) that i am adding to my client.

AnyWay This Control contains a Bitmap picture that is 272x600 wit 3 buttons on it with is 202x36, all is BMP.

When moving other Windows ower my Client(where the Bitmaps is) thay are updated wary slow? Is there any easy way to make it go faster?

I am loading all pictures in to Bitmaps object on startup and then adds them to the right controls.

Best Regards
Jimmy

Re: Handle Bitmaps faster?

Stefan Troschuetz12-Jan-05 1:10

Stefan Troschuetz

12-Jan-05 1:10

Maybe enabling of double-buffering improves your situation.
Take a look at the following[^].

www.troschuetz.de

Re: Handle Bitmaps faster?

Snowjim12-Jan-05 1:21

Snowjim

12-Jan-05 1:21

Thanks

i have added the following line ni bouth the MainClient(project) and Windows Control Libraray(the control) in theres cunstructer:

SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.DoubleBuffer | ControlStyles.UserPaint, true);

But this dosent do anything. When i am moving an other window ower the bitmaps the window that i am moving over is lagging on the bitmap creating alot of windows, and it take about 1 sec before the bitmap is updated and the Window crap on the bitmap is over painted.

Im i doing any wrong ? shold i not be abled to move a Window over my project with a bitmap in with out this problem?

Best Regards
Jimmy

Re: Handle Bitmaps faster?

Stefan Troschuetz12-Jan-05 1:36

Stefan Troschuetz

12-Jan-05 1:36

Try calling the method inside of an event handler for the Load event and add a call to the UpdateStyles method, which forces the assigned styles to be reapplied to the control.

www.troschuetz.de

Re: Handle Bitmaps faster?

Snowjim12-Jan-05 1:44

Snowjim

12-Jan-05 1:44

Do you mean that you could call this in the contructer of my Main project

SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.DoubleBuffer | ControlStyles.UserPaint, true);<br />
this.UpdateStyles();

This does not changes Frown | :(

Or how do you mean i shold add it?

Re: Handle Bitmaps faster?

Stefan Troschuetz12-Jan-05 2:17

Stefan Troschuetz

12-Jan-05 2:17

I'm not sure if it's sufficient, if you call it only in your main project. I never used double buffering myself (never needed too), but it was sometimes mentioned in this forum when talking about flickering or drawing problems.
But I'm pretty sure that placing the code inside the constructor won't have any effect cause the documentation for the UpdateStyles method states that "The UpdateStyles method has no effect if the IsHandleCreated property value is false.", which is the case during construction. So try moving it into an event handler for the Load event.

www.troschuetz.de

Re: Handle Bitmaps faster?

Snowjim12-Jan-05 3:31

Snowjim

12-Jan-05 3:31

Thanks!

I have tryed your ide and it siems to work a little.
But the buttons and so on that is placed on the bitmap is steal lagging alot, when moving window over them.

Do i realy have to make my own buttons and use this Style on them?

Re: Handle Bitmaps faster?

Stefan Troschuetz12-Jan-05 3:41

Stefan Troschuetz

12-Jan-05 3:41

I'm glad that I could help a bit Smile | :)

Unfortunately I can't answer your last question cause as I said I've never used double buffering myself and therefor haven't that much experience and knowledge. Sorry.

www.troschuetz.de

Events with .Net remoting

Member 164882911-Jan-05 23:46

Member 1648829

11-Jan-05 23:46

I have a solution that I have created using .Net remoting and am having a lot of trouble upgrading it to use events.

The solution uses a remote singleton object which I'm hosting with my own server. A requirement of the solution is that the remote object's assembly must remain seperate from the client so I am using an interface.

I have created a seperate assembly so that it can be referenced by both the client and the remote object's assemblies. This new assembly contains a single class that implements the Activator.GetObject method and subscribes to the remote event. After a little playing around with the formatter sink classes I can instantiate this class from the client application and it seems to successfully subscibe to the remote event (or at least it no longer throws exceptions). However the client side event handler is never called. I have implimented tracing on the server side to ensure that the event is being raised and event handlers are working there.

Does anyone know where I'm going wrong?

Calling C# DLL through Borland C++

kinju11-Jan-05 23:16

kinju

11-Jan-05 23:16

Hellow Friends,

My Problem is i have created a dll using C# and i have made every necessary thing to make it interoperatable and i have called it using VC++ 6.0.:-> sucessfully....
But now i need to call the same using Borland C++.. Confused | :confused:

Can anyone help me doing this...
i have searched a lot but i dint find any document related this ISSUE...

Thanx...

UpdateLayeredWindow problem ...

Axonn Echysttas11-Jan-05 21:57

Axonn Echysttas

11-Jan-05 21:57

Hi everybody... I got a short question about one nasty little API function which I am in most dire need of. I need to somehow update the translucency / transparency setting of a normal window. Say I got two buttons and a Scrollbar. I need to somehow call the UpdateLayeredWindow function each time the scrollbar is modified so I can modify the translucency (opacity) level of my window. So far, I need to DESTROY and create the window AGAIN and use "SetLayeredWindowAttributes" to achieve this. But it's not a solution, this is a workaround and it's not nice at all : ), I think you agree : ).

Here's what I got so far... (this is VB6 code, but any language will do, I can adapt to anything, the only thing that I need is to actually make this WORK : ) ).

<br />
UpdateLayeredWindow Me.hwnd, Me.hdc, ByVal 0, m_windowSize, m_mainSurfaceDC, <br />
m_srcPoint, 0, m_blendFunc, ULW_ALPHA

You don't have to care about the parameters. My question is not related to those. My question is... can this nasty function be used to set a NORMAL WINDOW? I mean not a bitmap! A window... with some buttons and stuff on it. I am sure it must be possible, but I just don't know how. It's one nasty little function and I can't find anywhere some good documentation about it, only examples that are not working properly or do more than I need this function to do. I Googled for it and 60% of the results were declaring it, but not using it ! HA! Imagine that! : (. The other 40% were either using bitmaps, either not working.

I got one example that uses bitmaps, but that's too complicated and it's not what I need. I tried to put a scrollbar on that window and it wouldn't even appear, of course, since the guy who did this is using some bunch of functions to work with the bitmaps : (.

Thank you a LOT for reading this and I would really appreciate any help, it's for a good cause : ) (freeware application). I sure hope there are some people on the Code Project who ran into this function before.

Just before you ask.... no, I can't use .Net to do this, but some .Net ideas WOULD be usefull since I could at least port it to my VB 6.

Have a nice day everybody : )

The Greater Mind Balance

Re: UpdateLayeredWindow problem ...

Dave Kreskowiak12-Jan-05 4:52

Dave Kreskowiak

12-Jan-05 4:52

1) Cross posting in multiple forums on the same site is considered very rude!

2) Posting VB code and asking VB questions in a C# or C++ Forum could get you strung up by your nads! Be prepared to receive much abuse.

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

Pocket PC Application

vksrisridhar11-Jan-05 21:20

vksrisridhar

11-Jan-05 21:20

hi all,

please tell me how can i capture TAB Key and is there is any property for automatic scroll in a tab control in .NET Compact framework.

Sri

How to create a "Double Click event"

lee meng11-Jan-05 20:47

lee meng

11-Jan-05 20:47

I am a student working on a stanalone project.

I have problem making a double click event on button. Is it that c# cannot do it? Have to use multi language like include a VBscript? If yes how to use multi language? Can i see a executable source code cause i m quite a slow learner.

Example: how to make a window based application that if u double left click your button. The label will be labeled "Hi", and if u single left click the button it will display "Hello".

It is a simple example i give to lower complicate my question. I have already spend quite some time developing my other functions in c# and got stuck to this problem therefore i wish not to change my programming language but import some other language to my c# project if necessary.

Please help fast... deadline coming near...

Re: How to create a "Double Click event"

Stefan Troschuetz11-Jan-05 21:20

Stefan Troschuetz

11-Jan-05 21:20

You don't have to use any other language here.
You'll have to handle the Click event of your button and determine inside the event handler whether two consecutive clicks are close enough to be considered a double click. To achieve this, start a simple timer in the event handler and check whether its interval has elapsed. If not, the user double-clicked your button.

www.troschuetz.de

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