C# Discussion Boards - CodeProject

Re: Report Progress from a class with a backgroundWorker

DaveyM6914-Feb-11 11:24

DaveyM69

14-Feb-11 11:24

Ian Shlasko wrote:
I wonder if the BackgroundWorker only allows ReportProgress to be called during the DoWork

No, internally it uses a SendOrPostCallback delegate and an AsyncOperation. If the AsyncOperation is null (there is no active worker thread) then the delegate is called directly. If it's not null then the AsyncOperation's Post method is called with the delegate and args as parameters which automatically invokes it on the syncronization context that RunWorkerAsync existed in.

public void ReportProgress(int percentProgress, object userState)
{
    if (!this.WorkerReportsProgress)
    {
        throw new InvalidOperationException(SR.GetString("BackgroundWorker_WorkerDoesntReportProgress"));
    }
    ProgressChangedEventArgs arg = new ProgressChangedEventArgs(percentProgress, userState);
    if (this.asyncOperation != null)
    {
        this.asyncOperation.Post(this.progressReporter, arg);
    }
    else
    {
        this.progressReporter(arg);
    }
}

Dave

Binging is like googling, it just feels dirtier.
Please take your VB.NET out of our nice case sensitive forum.
Astonish us. Be exceptional. (Pete O'Hanlon)

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Set a picture transparently in the foreground

Mschauder14-Feb-11 2:21

Mschauder

14-Feb-11 2:21

Hey guys,

is it possible to load a .jpg on a form and make it transparently to sketch it in paint or somewhere else?
The picture should always stay in the foreground, but I want interact to the window under it.

any suggestions? D'Oh! | :doh:

Re: Set a picture transparently in the foreground

musefan14-Feb-11 3:03

musefan

14-Feb-11 3:03

How about...

- Set jpg as form BackgroundImage
- Set form Opacity to 50% (or whatever)
- Set FormBorderStyle to None (but you will have to handle Move another way)
- Set form TopMost to true

Illogical thoughts make me ill

Re: Set a picture transparently in the foreground

Mschauder14-Feb-11 3:15

Mschauder

14-Feb-11 3:15

yeah, thank you Big Grin | :-D

!

But 1 Problem remain...
How could I draw under it without set the focus to the Form? Confused | :confused:

Re: Set a picture transparently in the foreground

musefan14-Feb-11 3:42

musefan

14-Feb-11 3:42

Ahhh.. I knew it seemed too easy D'Oh! | :doh:

Maybe this[^] will help

Illogical thoughts make me ill

Re: Set a picture transparently in the foreground

Mschauder14-Feb-11 22:08

Mschauder

14-Feb-11 22:08

Yeah its vb.net but I have no problem with it !
Thank you very much Rose | [Rose]

directory path

arkiboys13-Feb-11 22:12

arkiboys

13-Feb-11 22:12

I am using a windows service project i.e. winService.
Inside this project, I have placed an xml file.
This winService project, calls a class library project i.e. classLibrary.
Inside the classlibrary, there is a class i.e. myclass.cs which has to get the path of the xml file which as mentioned above is inside the winservice project and it is called test.xml

I am using the following code in the class myclass.cs which is inside the classlibrary project to get the path of the xml file:

string strPath = AppDomain.CurrentDomain.BaseDirectory + "test.xml";

Question:
The code above returns the path of the winservice\bin\debug
Is it correct to place the test.xml inside the bin\debug folder?
or Should the test.xml file be placed on the root of the winservice project instead?
and is the code ok?
Thanks

Re: directory path

Pete O'Hanlon13-Feb-11 22:17

Pete O'Hanlon

13-Feb-11 22:17

When you deploy your project, your executable will be located in a different directory to the one you build into. This means that your xml file should be in the executable directory or a subdirectory of that, so your code is fine(ish). When creating paths from variables, you should always look to use Path.Combine(pathroot, file);.

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Re: directory path

arkiboys13-Feb-11 22:23

arkiboys

13-Feb-11 22:23

Hi,
By executing directory I think you mean my winservice project in this case.
If so, I have placed the test.xml file in this directory.
Am I right so far?

Re: directory path

Pete O'Hanlon13-Feb-11 22:45

Pete O'Hanlon

13-Feb-11 22:45

Yes.

I'm not a stalker, I just know things. Oh by the way, you're out of milk.

Forgive your enemies - it messes with their heads

My blog | My articles | MoXAML PowerToys | Onyx

Re: directory path

arkiboys13-Feb-11 23:22

arkiboys

13-Feb-11 23:22

I see.
I will continue testing and will ask questions later if it is ok please.
Thank you.

Re: directory path

Dalek Dave14-Feb-11 0:14

Dalek Dave

14-Feb-11 0:14

As Pete says, paths are notorious for changing, keep them fluid.

------------------------------------

I will never again mention that I was the poster of the One Millionth Lounge Post, nor that it was complete drivel. Dalek Dave

CCC League Table Link
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Re: directory path

GenJerDan14-Feb-11 0:29

GenJerDan

14-Feb-11 0:29

arkiboys wrote:
string strPath = AppDomain.CurrentDomain.BaseDirectory + "test.xml";Question:
The code above returns the path of the winservice\bin\debug
Is it correct to place the test.xml inside the bin\debug folder?

It does?

Shouldn't it be AppDomain.CurrentDomain.BaseDirectory + "\\test.xml" or a variation thereof?

..and water fell from the sky like rain.

Re: directory path

Pete O'Hanlon14-Feb-11 0:34

Pete O'Hanlon

14-Feb-11 0:34

As I stated earlier, this method should not be used. Path.Combine is the best way to create the path structure.

I'm not a stalker, I just know things. Oh by the way, you're out of milk.

Forgive your enemies - it messes with their heads

My blog | My articles | MoXAML PowerToys | Onyx

Re: directory path

Luc Pattyn14-Feb-11 1:01

Luc Pattyn

14-Feb-11 1:01

if your app would need to create/modify the XML file, it would not be wise to put such data file in the EXE's folder as:
1. the folder is shared by all users;
2. the folder might be write-protected.

When in doubt, the better approach is to use one of the official folders as returned by Environment.GetFolderPath().

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, improve readability, and make me actually look at the code.

Re: directory path

PIEBALDconsult14-Feb-11 2:00

PIEBALDconsult

14-Feb-11 2:00

I never put settings files in an application directory; I put them in a settings directory -- that's what they're for.

For instance C:\Documents and Settings\All Users that way they can even be shared among different applications as well as different users.

Con open wait

Ajay Kale New13-Feb-11 22:01

Ajay Kale New

13-Feb-11 22:01

Hi All,

I want to show some ongoing even on in the mean time when the connection is being opened.
When I tried to show the LABEL or tried to MODIFY the text of button, it doesn't happen till
the conn is opened. After conn opens - then only the text is changed as 'Connecting...' ,
which I want to show in the mean time when connection is getting opened.

Any help..?

Thanks and regards
- Ajay K

Re: Con open wait

Pete O'Hanlon13-Feb-11 22:13

Pete O'Hanlon

13-Feb-11 22:13

It sounds like you are trying to update the label and open the connection on the same thread. If you need them both appear to be happening at the same time, you should move the connection handling onto a background thread.

I'm not a stalker, I just know things. Oh by the way, you're out of milk.

Forgive your enemies - it messes with their heads

My blog | My articles | MoXAML PowerToys | Onyx

Re: Con open wait

Luc Pattyn14-Feb-11 0:52

Luc Pattyn

14-Feb-11 0:52

the following sequence could suffice:

label1.Text="Going to connect";
label1.Refresh();
Connect();
label1.Text="Connected";
label1.Refresh();  // optional

however it is always better to delegate long-winding or possibly long-winding operations to another thread.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, improve readability, and make me actually look at the code.

Re: Con open wait

PIEBALDconsult14-Feb-11 1:42

PIEBALDconsult

14-Feb-11 1:42

But what if it doesn't connect? Then the "Connecting..." text is a lie and you've just lied to your trusting user; that's poor customer relations. Don't promise something that you can't deliver. Change the text to "Attempting to connect... this usually works... but some times it doesn't... and if it doesn't, then I'll be just as sad as you will be and we can cry together."

Using DotNetNuke in c#

sarang_k13-Feb-11 20:08

sarang_k

13-Feb-11 20:08

Hi all,

I want to use a dotnetnuke login code in a c# application and the data is store in MSSQL database.

I am new to it ?

Can anyone tell me how can i use it.

Thanks in advance.

Re: Using DotNetNuke in c#

Richard MacCutchan13-Feb-11 22:35

Richard MacCutchan

13-Feb-11 22:35

You could try here[^].

I must get a clever new signature for 2011.

progress bar while switching to new page

Mugdha_Aditya13-Feb-11 18:26

Mugdha_Aditya

13-Feb-11 18:26

Hi all, I need to develop a progress bar in my web application which is in asp.net. This progress bar should see on screen while switching to new page of my application.

I have master page in which i have created diffrent menues.. like Audit,Manual,Update
on click of tht different pages will get disply.

so i want to disply progressbar on click of those menus

<td id="tdmnuPerfRating" valign="middle" align="center" style="width: 200px; height: 25px;
background-image: url(./images/grey_bg.jpg);" onmouseover="javascript:changecolor(this,'on');"
onmouseout="javascript:changecolor(this,'off');">
<asp:HyperLink ID="HyperLink3" runat="server" CssClass="CSMenu" Text="Performance Rating"
NavigateUrl="~/ViewAudit.aspx" />
</td>
<td align="center" valign="middle" style="width: 1px; height: 25px">
<div style="display: inherit;">
<img src="images/line_vertical.jpg" border="0" alt="Line" height="25px" /></div>
</td>
<td id="tdIssue" valign="middle" align="center" style="width: 200px; height: 25px;
background-image: url(./images/grey_bg.jpg);" onmouseover="javascript:changecolor(this,'on');"
onmouseout="javascript:changecolor(this,'off');">
<asp:HyperLink ID="HyperLink27" runat="server" CssClass="CSMenu" Text="Issues"
NavigateUrl="~/ViewIssues.aspx" />
</td>

Re: progress bar while switching to new page

Richard MacCutchan13-Feb-11 22:34

Richard MacCutchan

13-Feb-11 22:34

Mugdha_Aditya wrote:
I need to develop a progress bar in my web application which is in asp.net.

Then kindly post your question in the correct forum, i.e. ASP.NET.

I must get a clever new signature for 2011.

PolyLib Modifying the ToString method

Ryano12113-Feb-11 5:03

Ryano121

13-Feb-11 5:03

I have found a great library for polynomials here on code project

A C# Class for Complex Polynomials[^]

I just wondered how i would go about changing the ToString method to print out the polynomial in the form 2x^2 + 3x + 4 etc

I have tried to modify the for loop to go down instead of up but it doesnt come out correctly. I have also tried modifying other values yet it results in the index out of bounds error.

Any suggestions would be greatly appreciated!

Thanks in advance

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