C# Discussion Boards - CodeProject

ASP.Net : Problem in Button.OnClientClick Property.

hdv21215-Dec-06 1:56

15-Dec-06 1:56

hi in my WebForm I have a label and textBox and button, i want when user click button,OnClientClick occure and set label.Text to "Please Wait ..."
how to do that?

Note : i want to use JavaScript to Execute this Action (Client Side).

i wrote this code but when i click button, Nothing Occured :

.... "OnClientClick"="_Wait();"

function _Wait()
{
document.getElementById("Label13").Text = "Please Wait ...";
}

thanks.

Re: ASP.Net : Problem in Button.OnClientClick Property.

Frank Kerrigan15-Dec-06 3:52

Frank Kerrigan

15-Dec-06 3:52

You could use serveside code to do it insteed. But this will incur a roundtrip/postback to the server. If your posting back anyway you might as well use the serverside method.

Blog Have I http:\\www.frankkerrigan.com

Re: ASP.Net : Problem in Button.OnClientClick Property.

albCode15-Dec-06 4:39

albCode

15-Dec-06 4:39

hdv212 wrote:
... "OnClientClick"="_Wait();"

It should be

yourbuttonname.Attributes.Add("OnClick","_Wait()");

protected void yourbuttonname_Click(object sender, EventArgs e)<br />
{<br />
  Label13.Text = TextBox1.Text;<br />
}<br />

Hope this helps

"My advice to you is to get married. If you find a good wife, you will be happy; if not, you will become a philosopher." Socrates

Re: ASP.Net : Problem in Button.OnClientClick Property.

hdv21215-Dec-06 5:24

hdv212

15-Dec-06 5:24

Thanks for reply
but i want ti use JavaScript (ClientSide) For OnClientClick Attribute.

Re: ASP.Net : Problem in Button.OnClientClick Property.

DavidNohejl15-Dec-06 11:24

DavidNohejl

15-Dec-06 11:24

Was that _Wait() function even called? Where is that script located? In head? Do you get any javascript errors in browser? Is that label's id really "Label13"? Could be as well someControl$ctrl00$Label13 or something...

"Throughout human history, we have been dependent on machines to survive. Fate, it seems, is not without a sense of irony. " - Morpheus

What is the BindableAttribute for?

Ashley van Gerven15-Dec-06 0:47

Ashley van Gerven

15-Dec-06 0:47

Does anyone have a simple explanation of what [Bindable(true)] does?

thanks

"For fifty bucks I'd put my face in their soup and blow." - George Costanza

~ Web SQL Utility - asp.net app to query Access, SQL server, MySQL. Stores history, favourites.

Re: What is the BindableAttribute for?

J. Dunlap15-Dec-06 1:44

J. Dunlap

15-Dec-06 1:44

It tells the design-time system that a property is one that is intended to be data-bindable in normal scenarios. Only properties with [Bindable(true)] applied can be bound using the designer. At runtime, however, any property can be data-bound, regardless of whether it is marked as bindable.

Re: What is the BindableAttribute for?

Ashley van Gerven15-Dec-06 2:10

Ashley van Gerven

15-Dec-06 2:10

OK thanks. I take it to mean that databinding to a non-bindable property will not have any visible effect. MSDN says something about raising a notification when it's changed.

"For fifty bucks I'd put my face in their soup and blow." - George Costanza

~ Web SQL Utility - asp.net app to query Access, SQL server, MySQL. Stores history, favourites.

Graphics issue

Dobromir Dimitrov15-Dec-06 0:43

Dobromir Dimitrov

15-Dec-06 0:43

Hi. I am developing a graphics intensive application where I need to save a certain state of the grapfics object in an Image (much like when you save someting you have drawn in PhotoShop for example).
Does anyone know how I can do that?

Re: Graphics issue

Guffa15-Dec-06 1:19

Guffa

15-Dec-06 1:19

A Graphics object does not have any state that you can save as an image. A Graphics object is only used for the drawing, it does not contain the graphics.

---
It's amazing to see how much work some people will go through just to avoid a little bit of work.

Re: Graphics issue

Bekjong15-Dec-06 1:54

Bekjong

15-Dec-06 1:54

Use GetGraphics from the control of which you want save the content, then use the DrawImage method on the graphic context this gets you to draw the content to an image.

__________________________________________________
Standards are great! Everybody should have one!

from datagridview to xml

Yustme15-Dec-06 0:23

Yustme

15-Dec-06 0:23

Hi,

I was wondering how i can overwrite an existing xml file when a row is deleted in datagridview with the data that currently is in the gridview?

The same data in an xml file are displayed in this datagridview. So i want to keep the xml file updated.

I got this event handler declared:

this.grid.RowsRemoved += new DataGridViewRowsRemovedEventHandler(grid_RowsRemoved);

private void grid_RowsRemoved(object sender, DataGridViewRowsRemovedEventArgs e)
{
//throw new Exception("The method or operation is not implemented.");
}

But i have no idea how to check what row is removed and to what child it is in an xml file.

Can anyone help me with this?

Thanks in advance!

Browser shudown question

Andrew Mercer14-Dec-06 23:51

Andrew Mercer

14-Dec-06 23:51

Hi,

Not certain of best place to post this - though thought readers of this board may
be able to answer my question or point me in the right direction.

I have a Web App that requires confirmation of when the user logs out.
Have successfully been able to handle this by calling a WebService when
the windows closes using the onunload event.

This works fine whether the user logs out using my logout link or even if
they use the [x] on the Browser window.

However I would like the option of halting the shutdown under certain circumstances.
This is O.K with my logout link but when the user clicks the [x] the browser always
closes.

I have found one way by using the following Javascript: window.open(parent.location);
This reloads the page but looses any changes made to the form by the user that have yet to be saved. As it is this I am trying to handle it some what defeats the object (ie: If the user makes changes to the form and tries to close before submitting I want to give them the option to save or ignore).

I need to find a way to stop the closing of the Browser mid-flow when the user uses the
[x] and keep the same page visible with the same data.

Thanks for any advice

Andrew

Re: Browser shudown question

Frank Kerrigan15-Dec-06 0:12

Frank Kerrigan

15-Dec-06 0:12

Web sites are stateless, so you can't tell if the use has gone off, died or pulled the plug on the pc. If the user hits a logout button then you can tell they have left the site so you need to look for session end in all other cases. This can only be done on the server end rather on the client end.

If you are using .NET then tie the session to a login then once the session ends you can handle this with the session_end event and handle that the user has left the system/application

Blog Have I http:\\www.frankkerrigan.com

Re: Browser shudown question

Andrew Mercer15-Dec-06 1:57

Andrew Mercer

15-Dec-06 1:57

Hi,

Sorry I do not think I have made myself clear.

I know Web Sites are stateless - what I am after (maybe NOT possible but I have found similar questions and limited answers, see my earlier email) is to know whether it is possible to catch the close [x] event and when required stop the Browser window closing.

I am catching the close[x] event however what I have not been able to do is stop the window closing. Another suggestion I have seen is to the onbeforeunload event, but this does allow me to do quite what I want.

I was merely checking whether anyone on the Message Board had any better ideas...

Thanks again

Andrew

Re: Browser shudown question

Dave Kreskowiak15-Dec-06 5:21

Dave Kreskowiak

15-Dec-06 5:21

There is no way to stop a browser window from closing on the client side. Either from code running inside the browser session or from the server side. Once that little [X] is clicked, that's it, you're done.

Dave Kreskowiak
Microsoft MVP - Visual Basic

Reset Scrollbar Position

jimmahnow14-Dec-06 23:19

jimmahnow

14-Dec-06 23:19

Hi everyone,
I have a problem with a user control I have built for my application. I have a vertical scrollbar on the right of the control. The application is an MDI app, so when I scroll down in this control, and click on an item in it, it loads another form. However when I return to the original control, the scrollbar is still in the position I left it.

Basically, I need some way to force the scrollbar to reset its position to the top, possibly using an onfocus event or similar, but have been unable to find a way of doing this so far.

Any help would be much appreciated.

Thanks in advance.

Jim Smile | :)

Re: Reset Scrollbar Position

Ilíon15-Dec-06 5:41

Ilíon

15-Dec-06 5:41

Depending on how you've written your control (and how it inherits), something like the following might help:

// To scroll to the "top" of 'theObject'
theObject.AutoScrollPosition = new System.Drawing.Point(0, 0);

// To scroll to a specific vertical position (with appropriate value for 'Y')
theObject.AutoScrollPosition = new System.Drawing.Point(0, Y);

Re: Reset Scrollbar Position

jimmahnow16-Dec-06 6:02

jimmahnow

16-Dec-06 6:02

Thanks man,
I managed to produce a similar solution myself, appreciate the reply!

Jim Smile | :)

special characters !!!!!

quiteSmart14-Dec-06 23:06

quiteSmart

14-Dec-06 23:06

hi,

i have an application to develop. one of its part is to make a form for the new users to register.

I have some restrictions on the user name that i should specify.

One of the restrictions is that a user name can not include special characters of any kind. (Don't ask me why cz the project manager wants so).

the following special characters are restricted:

~ ! @ # $ % ^ & * ( ) _ + = -| \ } ] { [ : ” ’ ; ? / > < , .

so if anybody has a regular expression for such a case please give it to me cz i am not that good in regular expressions.

Thanks in advance

best regards

Re: special characters !!!!!

Guffa14-Dec-06 23:19

Guffa

14-Dec-06 23:19

quiteSmart wrote:
the following special characters are restricted:

~ ! @ # $ % ^ & * ( ) _ + = -| \ } ] { [ : ” ’ ; ? / > < , .

But not characters like these?

" ' ` ¨ ½ § £ € Í Ò ñ å Ä ô ü ì î ä Ô Ë Ö Å ÿ õ

Those are just a few of the characters I can type directly on my keyboard. There are more, and then there are thousand of other special characters in the unicode character set.

You should define the characters that are allowed instead. That will be much easier.

---
It's amazing to see how much work some people will go through just to avoid a little bit of work.

Re: special characters !!!!!

quiteSmart14-Dec-06 23:40

quiteSmart

14-Dec-06 23:40

mmmmmmmmmmmmmmmmmmmmmmmmmmmmm

That's good.

Thank you man.

I will define it to accept only alphanumeric characters and that will be fine for the manager i think.

I should have thought about that before asking in here.

Thank you Guffa. Rose | [Rose]

Re: special characters !!!!!

quiteSmart14-Dec-06 23:58

quiteSmart

14-Dec-06 23:58

Guffa one more question plz

i am verry bad in regular expressions

so can you please tell me how to do that regular expression

Re: special characters !!!!!

Guffa15-Dec-06 1:20

Guffa

15-Dec-06 1:20

Perhaps something like:

^[0-9A-Za-z]+$

---
It's amazing to see how much work some people will go through just to avoid a little bit of work.

Re: special characters !!!!!

quiteSmart15-Dec-06 1:31

quiteSmart

15-Dec-06 1:31

hey man thanks a lot

i realy appreciate it.

i just did a single addition to the regex u gave me

it is now like this

^[0-9A-Za-z]{6,}$

i did that ccz i need to have more than 6 chars for the user name

thanks again Rose | [Rose]

;)

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