Re: How can I avoid waiting for a response after an HttpWebRequest POST? - C# Discussion Boards

fade in /fade out

half-life1-Jun-07 14:21

half-life

1-Jun-07 14:21

hi how can i add the fade in /fade out effects
to a usercontrol i build

kobkob

Re: fade in /fade out

xibeifeijian1-Jun-07 18:50

xibeifeijian

1-Jun-07 18:50

Build a timer control,then change the form's transparence--Just change the form's Opacity Property.

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Re: fade in /fade out

half-life2-Jun-07 1:36

half-life

2-Jun-07 1:36

the problem is that itws a UserControl not a form
and the opacity propertie does not exist int this object
tnk's Smile | :)

anyway

kobkob

usercontrol

half-life1-Jun-07 14:20

half-life

1-Jun-07 14:20

hi, i like to know how to add
fade in/fade out effects to my usercontrol
Opacity works only with high level Objects (Form)
tnk' Smile | :)

kobkob

How can I avoid waiting for a response after an HttpWebRequest POST?

kontrolakka1-Jun-07 9:40

kontrolakka

1-Jun-07 9:40

I’m POSTING to an ashx file from my aplication.
What I want to do is just post information about some variables of my aplication, and never wait for an answer.
What I need is to avoid waiting for an answer, because I don’t need it.
I’m accesing the file this way.

-----------------------------
string queryString = "http://website/PrivateHandler.ashx";
System.Net.HttpWebRequest myHttpWebRequest = (System.Net.HttpWebRequest)WebRequest.Create(queryString);

myHttpWebRequest.Method = "POST";
myHttpWebRequest.ContentType = "application/x-www-form-urlencoded";
string strRequest = "mode=1&bID=1&gID=1";

UTF8Encoding objUTF8Encoding = new UTF8Encoding();
byte[] arrRequest = objUTF8Encoding.GetBytes(strRequest);
myHttpWebRequest.ContentLength = arrRequest.Length;
Stream strmRequest = myHttpWebRequest.GetRequestStream();

strmRequest.Write(arrRequest, 0, arrRequest.Length);
strmRequest.Close();

//Wait for an answer (I don’t need an answer).
System.Net.WebResponse resp = myHttpWebRequest.GetResponse();
System.IO.StreamReader sr = new System.IO.StreamReader(resp.GetResponseStream());
sr.ReadToEnd();
---------------------------------

WebResponse and ReadToEnd are there because if I don’t read what return, I can only call the ashx file twice and then the system hangs.

What I need is to post multiple times and never wait for an answer and waste performance because of that.

Is there a way to achieve what I need?

Thank you very much.

Martín Suárez Viacava

Re: How can I avoid waiting for a response after an HttpWebRequest POST?

Not Active1-Jun-07 10:06

Not Active

1-Jun-07 10:06

It appears your are trying to use an HTTPHandler as a Web Service. Why not just create a Web Service?

only two letters away from being an asset

Re: How can I avoid waiting for a response after an HttpWebRequest POST?

kontrolakka1-Jun-07 10:18

kontrolakka

1-Jun-07 10:18

Thanks for your answer.

If I use a WebService, won´t I have a lot of extra overhead?
I´m trying to avoid overhead as much as possible.

Thanks again.

Martín Suárez Viacava

Re: How can I avoid waiting for a response after an HttpWebRequest POST?

Not Active1-Jun-07 11:14

Not Active

1-Jun-07 11:14

You will have a better performing solution. A HTTPHandler isn't meant to be used in the manner you are trying.

"All an HTTPHandler does really is take an HTTPContext object and work out what to do with it."
http://aspalliance.com/articleViewer.aspx?aId=441&pId=[^]

only two letters away from being an asset

Re: How can I avoid waiting for a response after an HttpWebRequest POST?

xibeifeijian1-Jun-07 21:51

xibeifeijian

1-Jun-07 21:51

What about use asynchronous delegate?

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Re: How can I avoid waiting for a response after an HttpWebRequest POST?

kontrolakka4-Jun-07 19:24

kontrolakka

4-Jun-07 19:24

Thanks again for your help.
xibeifeijian, won't that create a new thread to hear for the async answer?

Thanks.

Martín

Re: How can I avoid waiting for a response after an HttpWebRequest POST?

Hesham Yassin6-Jun-07 8:39

Hesham Yassin

6-Jun-07 8:39

put the code in a thread....

Reading USB ID

SpaceMonkey19661-Jun-07 9:18

SpaceMonkey1966

1-Jun-07 9:18

I am writing a C# application that detects USB drives as they are plugged in.

I want to do different automated operations on the drive depending on which USB drive I plug in (ie if it is a new drive or one that has been previously plugged in).

The easiest way to achieve this would be to read the hareware ID off the USB drive. Unfortuneately I do not no how to do this in C#.

Does anyone have any ideas on how I could achieve this or if there is a C# class that returns this type of info?

Regards
SpaceMonkey

Re: Reading USB ID

simplicitylabs1-Jun-07 10:02

simplicitylabs

1-Jun-07 10:02

There is indeed a class that returns this type of info.

A most excellent gentleman by the name of Dan helped me out with this a while back. He has made a very simple to use class for this very purpose.

http://www.cfdan.com/posts/Retrieving_Non-Volatile_USB_Serial_Number_Using_C_Sharp.cfm

Csemaphore,C#

vunhat1-Jun-07 9:01

vunhat

1-Jun-07 9:01

dear you,
In MFC we has class Csemaphore,I want to ask you,what class we have in C#?
thanks

help me

Re: Csemaphore,C#

Giorgi Dalakishvili1-Jun-07 9:19

Giorgi Dalakishvili

1-Jun-07 9:19

We have semaphore class

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How to get all the instance of a windows Service using WMI?

sundar1561-Jun-07 8:24

sundar156

1-Jun-07 8:24

Hi,
I have a windows service installed in my machine and User can create multipe instance of the Same service dynamically. Now the Problem is how to get the Name of all the Instance of the Windows Service from my windows Application using WMI ?

people laugh at me because they say im different and I laugh at them because they are all the same.

Re: How to get all the instance of a windows Service using WMI?

kubben1-Jun-07 8:53

kubben

1-Jun-07 8:53

Are you sure it is a windows service? You can only install unique named windows services so I am a little confused by your statement about User can create multiple instances of the same service. The service is always running and perhaps the service launches a windows app then or something?

Ben

Re: How to get all the instance of a windows Service using WMI?

sundar1561-Jun-07 9:06

sundar156

1-Jun-07 9:06

Of Course it is a windows service...The name of the Service is Of Course Unique...but has one Executable.

people laugh at me because they say im different and I laugh at them because they are all the same.

How to access the data in a "DataSet" rather than a "DataGridView"?

Khoramdin1-Jun-07 8:24

Khoramdin

1-Jun-07 8:24

Hello everyone,

I have a DataGridView which is populated by data from a remote DataBase server. The following code show this:

//create a mysql DataAdapter<br />
                OdbcAd = new System.Data.Odbc.OdbcDataAdapter("SELECT * FROM company;", OdbcCon);<br />
<br />
                //now fill and bind the DataGrid<br />
                OdbcAd.Fill(myds4, "company");<br />
<br />
                //Display the table "company" in the datagridview controller<br />
                dataGridView4.DataSource = myds4.Tables["company"];

I was wondering if it is possible to access the data in the DataSet rather than in DataGridView?

For example:

I am using the following line of code to get the "company_name" value and display it in an TextBox.

txtCompanyName.Text = dataGridView4.Rows[FilterCompany_id].Cells["company_name"].Value.ToString();

My question is, rather than tapping into DataGridView4; can I tap into "myds4" which is the DataSet holding the entire unfiltered data since I am applying filters to the data shown in the DataGridView?

Thank you very much and have a great day.

Khoramdin

Re: How to access the data in an &quot;DataSet&quot; rather than DataGridView? [modified]

Giorgi Dalakishvili1-Jun-07 8:31

Giorgi Dalakishvili

1-Jun-07 8:31

yes you can. myds4.Tables["company"][rownumber][columnnumber] or myds4.Tables["company"][rownumber]["columnname"]

-- modified at 14:46 Friday 1st June, 2007

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shortcut to trigger event when not in focus

crash8931-Jun-07 7:44

crash893

1-Jun-07 7:44

does anyone know a way to make an event trigger if a key combo is pressed ( lets say ctrl+alt+insert) that would trigger an event to go

the problem is that the app may not be in focus

Re: shortcut to trigger event when not in focus

kubben1-Jun-07 7:51

kubben

1-Jun-07 7:51

You can do it, but I am not sure you really want to. If you hook into the windows message loop you can pick up on all windows messages includeing keyboard keypresses, but it is pretty intensive and would most likely affect the proformace of your application and perhaps the performance of others as well. I guess I would ask why do you want to do this? Is there a better way to do the same thing? It would be un likely that your users would know this key press short cut.

Now if you are trying to write a nice little hack that is looking for control - alt del and then you are trying to get the password typed it etc. that is another issue. You won't find much help here on this site for that type of stuff.

Ben

Re: shortcut to trigger event when not in focus

crash8931-Jun-07 7:55

crash893

1-Jun-07 7:55

the problem is that they are working seamlessly

there is an application they use that is run on a remote server

and on occasion it locks up and the user does not have access to ctrl alt delete becuase it is running on a remote session and that would open taskmanager for there local comptuer

the only solution i can think of is to run another application with the remote application ( two applications) and when ever it locks up set it a key stroke command so that the second program (my program) kills the first which will respawn in a few seconds

since the second app will not have its windows displayed i dont know how else to trigger it other than to use a keyboard shortcut

also since they will be wokring in the other application, My app wont be the primary focus

Re: shortcut to trigger event when not in focus

kubben1-Jun-07 7:56

kubben

1-Jun-07 7:56

In the remote session you can right click on the task bar at the bottom and select task manager. That way they can see the task manager on the remote PC. I think that would be the best option.

Ben

Re: shortcut to trigger event when not in focus

crash8931-Jun-07 7:58

crash893

1-Jun-07 7:58

i think you missed the part about it running seamlessly

yes its a remote desktop but only the one application is displayed on the users computer

it gives the illusion that its running localy

so the taskbar and the start button all that stuff is you local compuer

just the app is displayed and run remotly.

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