ASP.NET

calling selectedindexchanged event

18-Oct-09 5:00

Ersan Ercek wrote:
to create a label, when a specific event is fired

to change its text to 'loading' and add '.' in a half second like

loading
loading.
loading..
loading...

You can simply do it usign AJAX. Try to use AJAX UpdatePanel and UpdateProgressBar.

Let us know if you need further help.

Abhijit Jana | Codeproject MVP
Web Site : abhijitjana.net
Don't forget to click "Good Answer" on the post(s) that helped you.

Re: loadingbox

mr_muskurahat19-Oct-09 1:00

mr_muskurahat

19-Oct-09 1:00

there are two ways to achieve this..

if you are using ajax then you need to put gif like
http://www.cis.uab.edu/forensics/blog/loading.gif[^]

in your update progress control which is related to ajax update panel.

or second thing if you want to handle it manually then you can show and hide it on start and end of each event manually.

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Government Dyal Singh College Lahore.

Ersan Ercek18-Oct-09 4:31

Ersan Ercek

18-Oct-09 4:31

Dear All,

Could somebody tell me how to call selectedindexchanged event during page_load event...

All the best

Re: calling selectedindexchanged event

Mircea Puiu18-Oct-09 5:15

Mircea Puiu

18-Oct-09 5:15

I assume you want to trigger that event during page_load.
Why don't you put the code in the event handler in some other method (a new one, which you must implement). Then you call the new method both in the event handler and in handler for page_load?

SkyWalker

Re: calling selectedindexchanged event

yesu prakash18-Oct-09 18:12

yesu prakash

18-Oct-09 18:12

use this..

Create this in page load and call the SelectedIndexChanged

object sender1 = new object();
EventArgs e1 =new EventArgs();
DropDownList1_SelectedIndexChanged(sender1, e1);

event:
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{

}

Web Service - HttpContext.Current is null

#realJSOP18-Oct-09 3:46

18-Oct-09 3:46

I created a web service with a method in it that returns the client's IP address. If I "view in browser" on the web service, the method works. If I call that method from a desktop application, The method throws an exception because HttpContext.Current is null.

How should I go about retrieving the client's IP address?

Here's the line I'm trying to use:

string clientIP = HttpContext.Current.Request.UserHostAddress;

.45 ACP - because shooting twice is just silly
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N a v a n e e t h18-Oct-09 4:22

N a v a n e e t h

18-Oct-09 4:22

It worked for me. HttpContext was not null when I tried. You can also try this.Context.Request.UserHostAddress as well.

Best wishes,
Navaneeth

#realJSOP18-Oct-09 8:11

18-Oct-09 8:11

This doesn't work either. Remember - I'm making the call from a desktop application - not a ASP.net web page.

Abhijit Jana18-Oct-09 8:33

18-Oct-09 8:33

Did you added System.Web NameSpace with your windows application ?

Abhijit Jana | Codeproject MVP
Web Site : abhijitjana.net
Don't forget to click "Good Answer" on the post(s) that helped you.

#realJSOP18-Oct-09 23:07

18-Oct-09 23:07

That's not going to make a property in HttpContext null is it? In fact, if there was a missing using, it wouldn't even compile.

N a v a n e e t h18-Oct-09 16:41

N a v a n e e t h

18-Oct-09 16:41

I understand that you are calling from a Desktop application and it worked just fine for me. Can you provide additional informations to reproduce this? I believe you are using a SOAP web service. Here is what I did and which worked for me.

In Web service:

[WebMethod]
public string TestHttpContext()
{
    if (HttpContext.Current != null)
        return "Context is not null";
    else
        return "Context is null!";
}

In Desktop application:

ServiceReference1.Service1SoapClient s = new ServiceReference1.Service1SoapClient();
string str = s.TestHttpContext();
Console.WriteLine(str); // Prints Context is not null

I also tried moving the HttpContext check to other class library as part of reproducing. But everything worked as expected.

If you can provide more information, I will try to reproduce.

Smile | :)

Best wishes,
Navaneeth

Vimalsoft(Pty) Ltd18-Oct-09 4:24

Vimalsoft(Pty) Ltd

18-Oct-09 4:24

Hi John

These two can give you the ip of a Client

string clientIP = Request.ServerVariables ["REMOTE_ADDR"];

string clientIP = Request.UserHostAddress;

Kind Regards

Vuyiswa Maseko

Vuyiswa Maseko,

Spoted in Daniweb-- Sorry to rant. I hate websites. They are just wierd. They don't behave like normal code.

C#/VB.NET/ASP.NET/SQL7/2000/2005/2008
http://www.vuyiswamaseko.com
vuyiswa@its.co.za
http://www.itsabacus.co.za/itsabacus/

N a v a n e e t h18-Oct-09 5:12

N a v a n e e t h

18-Oct-09 5:12

This doesn't help when he is getting HttpContext.Current as NULL.

Best wishes,
Navaneeth

JimmyRopes18-Oct-09 9:12

18-Oct-09 9:12

I believe you are blurring the lines between an Internet application and a desktop application.

When the application is running on the Internet you are executing on a hosting server which has a published IP address. Thus resolving it using HttpContext.Current.Request.UserHostAddress;

The IP address of a client machine executing a desktop application will be 127.0.0.1, the loop back IP address.

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JimmyRopes

Re: Web Service - HttpContext.Current is null [modified]

Not Active18-Oct-09 10:42

Not Active

18-Oct-09 10:42

JimmyRopes wrote:
I believe you are blurring the lines between an Internet application and a desktop application.

Look past the ego and actually read John's post.

John Simmons / outlaw programmer wrote:
I created a web service

only two letters away from being an asset

JimmyRopes18-Oct-09 11:09

18-Oct-09 11:09

Mark Nischalke wrote:
JimmyRopes wrote:I believe you are blurring the lines between an Internet application and a desktop application.

Look past the ego and actually read John's post.

John Simmons / outlaw programmer wrote:I created a web service

He is either working with a web service or a desktop application. Never both.

Thus my comment about blurring the lines between Internet applications (web services) and desktop applications.

Please confine you snipping to my post and not try to make it a global war.

Better yet if you would like to continue to snipe take it to the soapbox.

Simply Elegant Designs JimmyRopes Designs
Think inside the box! ProActive Secure Systems

I'm on-line therefore I am.
JimmyRopes

modified on Sunday, October 18, 2009 5:19 PM

Abhijit Jana18-Oct-09 11:20

18-Oct-09 11:20

JimmyRopes wrote:
He is either working with a web service or a desktop application.Never both.

Jimmy,
As per my understanding he is consuming a Web Service from a desktop Application. Current Context returning null because of that. Smile | :)

Abhijit Jana | Codeproject MVP
Web Site : abhijitjana.net
Don't forget to click "Good Answer" on the post(s) that helped you.

JimmyRopes18-Oct-09 11:24

18-Oct-09 11:24

Right I was mistaken there.

When he calls from a browser there is a current context but not from a desktop application.

Simply Elegant Designs JimmyRopes Designs
Think inside the box! ProActive Secure Systems

I'm on-line therefore I am.
JimmyRopes

Abhijit Jana18-Oct-09 11:30

18-Oct-09 11:30

JimmyRopes wrote:
When he calls from a browser there is a current context but not from a desktop application.

Exactly.
I am having doubt that regarding. It is not possible to get HttpContext from windows application as it is never running as an HTTP Context.
There may be some alternative solution.

Abhijit Jana | Codeproject MVP
Web Site : abhijitjana.net
Don't forget to click "Good Answer" on the post(s) that helped you.

JimmyRopes18-Oct-09 11:49

18-Oct-09 11:49

Abhijit Jana wrote:
It is not possible to get HttpContext from windows application as it is never running as an HTTP Context.

I would have to do some testing to see what is available from a desktop application. The debugger would probably be a good place to start.

Then when I found that I would need to see how to get it from a web service. I don't know if it is possible because there are real security concerns with accessing a client machine from the Internet.

An interesting question. If you have any thoughts please post them.

Simply Elegant Designs JimmyRopes Designs
Think inside the box! ProActive Secure Systems

I'm on-line therefore I am.
JimmyRopes

#realJSOP18-Oct-09 12:24

18-Oct-09 12:24

I would probably have to hit the web service via a http request so it could establish a context. But can't I somehow determine the IP address of the client without doing that?

Google hasn't been any help yet.

JimmyRopes18-Oct-09 12:33

18-Oct-09 12:33

John Simmons / outlaw programmer wrote:
I would probably have to hit the web service via a http request so it could establish a context.

Do you access the web service from the client application with a HTTP connection? If so you are hitting the web service with an HTTP request.

John Simmons / outlaw programmer wrote:
But can't I somehow determine the IP address of the client without doing that?

Probably because of the security restriction about accessing the client machine. Even just giving up the IP address would be a breach of protocol.

Simply Elegant Designs JimmyRopes Designs
Think inside the box! ProActive Secure Systems

I'm on-line therefore I am.
JimmyRopes