C# Discussion Boards - CodeProject

Re: how to read write xml file

26-Jun-06 1:37

Check these classes in your MSDN:
XmlDocument
XmlReader
XmlWriter

foysal mamun26-Jun-06 2:11

foysal mamun

26-Jun-06 2:11

thanks. i am trying. can u give me a complete example.

Re: how to read write xml file

Michael P Butler26-Jun-06 2:14

Michael P Butler

26-Jun-06 2:14

try this[^]

Google has plenty more samples if you search for them.

Michael

CP Blog [^] Development Blog [^]

getting ip or mac address with c# ?

cmpeng3426-Jun-06 1:23

cmpeng34

26-Jun-06 1:23

hi all,
how can i get my computer's ip or mac address with c# ?
is there a tutorial to learn much about getting tcp/ip settings ?
thanks in advance, bye.

Re: getting ip or mac address with c# ?

stancrm26-Jun-06 1:25

stancrm

26-Jun-06 1:25

http://www.codeproject.com/cs/internet/host_info_within_network.asp

Re: getting ip or mac address with c# ?

leppie26-Jun-06 1:26

leppie

26-Jun-06 1:26

This possible in .NET 2.0.

How xacc.ide transforms text to colored words on the screen
Intel PentuimM (aka Centrino) undervolting

Re: getting ip or mac address with c# ?

Tarakeshwar Reddy26-Jun-06 1:27

Re: Redirect file stream?

26-Jun-06 1:27

Mehmet Fatih Akbulut wrote:
how can i get my computer's ip or mac address with c# ?

Mac Address[^]

IP Address[^]

You can try googling to get more details.

Tarakeshwar
MCP, CCIE Q(R&S)

Before you criticize someone, you should walk a mile in their shoes. That way, when you criticize them, you're a mile away and you have their shoes.

!sgub evah t'nseod margorP sihT ?sgub naem ayaddahW

Redirect file stream?

Narthalion26-Jun-06 0:59

Narthalion

26-Jun-06 0:59

Hi!

I don't even know if this is possible or not...

I have an (3rd Party) application, that writes text into a logfile. I want to intercept this filestream an handle it in my own application. Is it possible (and how is it possible?) to redirect the stream into my application (or to get a copy of it)? I suppose that I have to use some win32-Api functions to achieve this.

Any help is appreceated Smile | :)

Thanks

Dirk

Nader Elshehabi26-Jun-06 1:45

Value member & display member for combobox when using datareader

26-Jun-06 1:45

Hello
This is quite an advanced trick. It may take a LOT of work to acheive. I really don't know how to do it directly -perhaps you may even want to do it with assimbly language Cool | :cool:

-
Anyway here are two articles that might give you a head start:

API hooking revealed[^]

Three Ways to Inject Your Code into Another Process[^]

ashishinfra26-Jun-06 0:56

ashishinfra

26-Jun-06 0:56

thanks a ton in advance

how should we add for value members and display members if binding is through the datareader and not dataset

currently i add using a loop due to which i cannot set the value memebers and display members had i done that using datasets

ComboBox1.Items.Clear()
     If (dr !=null)
     {
          while (dr.Read())
          {
              ComboBox1.Items.Add(dr"Name"]);
          }
      }

The secret of gettting ahead is getting started

Re: Value member & display member for combobox when using datareader

Paul Brower26-Jun-06 2:12

Paul Brower

26-Jun-06 2:12

Why don't you use the datareader to populate the dataset?

Re: Value member & display member for combobox when using datareader

ashishinfra26-Jun-06 2:31

ashishinfra

26-Jun-06 2:31

thanks paul,

what you suggested can be done , But Just wanted to know if using datareader directly against combobox and setting value members and display members is possible ..

and again
if i am using datareader to fill the dataset against dataadapter , what difference in the performance will it make (please consider this query to be on lower priority;))

please tell if some work around is possible ..

OpenFileDialog equivalent for a MTA app?

Jon Hulatt26-Jun-06 0:38

Jon Hulatt

26-Jun-06 0:38

Hi All,

My app is MTA, because it needs to be for directshow. I'm now wanting to use OpenFileDialog, but it seems to not work: calling ShowDialog results in a ThreadStateException with additional information

"Current thread must be set to single thread apartment (STA) mode before OLE calls can be made. Ensure that your Main function has STAThreadAttribute marked on it. This exception is only raised if a debugger is attached to the process"

Anyone got any ideas for an alternative or a workaround? My main thread needs to stay MTA, or directshow stuff i'm doing will not work.

Any help greatly appreciated!

Jon

using System.Beer;

Re: OpenFileDialog equivalent for a MTA app?

Nader Elshehabi26-Jun-06 1:32

Re: OpenFileDialog equivalent for a MTA app?

26-Jun-06 1:32

Hello
Why don't you make another STA thread, and show the openfile dialog within it?

Jon Hulatt26-Jun-06 4:13

Jon Hulatt

26-Jun-06 4:13

Problem with that is that if i show the dialog from another thread then i can do one of two things with my UI thread:- either Join on the worker thread (which locks the UI to the extent that it won't even redraw), or i can use a callback/message/event and invoke the dialog asyncronously - but then the main app's UI will be active because the dialog won't be modal.

using System.Beer;

Re: OpenFileDialog equivalent for a MTA app?

Nader Elshehabi26-Jun-06 6:00

Crystal reports... with a SQL or format string

26-Jun-06 6:00

Well, I anticipated this, but I believe the solution is simple.
1- Make a bool value that is always false
2- At each UI event (click, highlight, etc...) you check that value, if it's false continue
3- When you show the openfileDialog -or just any other dialog- you set this value to true and create and object reference to that dialog (of type Control maybe)
4- When the dialog returns, you set it to false again -so that the UI will work again-, then process the data returned by that dialog

In the Focus event -when the user set the focus to your main Application- check if the object reference is null, if not call its Control.Focus();

This way when the user clicks or moves the mouse around you'll still be able to draw your UI, yet the user won't be able to use it until the dialog returns. Also he won't be able to change focus until the dialog return.

I know it's a bit lousy way, but that is what I can think of. Smile | :)

I hope it works

Willem_Le_Roux26-Jun-06 0:32

Re: Crystal reports... with a SQL or format string [modified]

26-Jun-06 0:32

Hi Guru's

I recently moved from C++ to C# and so far, so good! But I do seem to have a little problem with displaying my reports designed with our good friend crystal reports! I am writing a simple Point Of Sale application for one of our clients, but I can't seem te send the reportviewer a SQL or "Format" string.

When the user selects the report he/she wants to see, I pop up a little dialog with a list that displays some invoice numbers. The user selects the invoice number and click on the "Print" button... and it displays the report... Brilliant!! Laugh | :laugh:

BUT... with ALL the entries in my table! Cry | :((

How do I pass the invoice number to the report and have it display all entries of the selected invoice number only? In C++ I used to, grab the values from my little dialog, construct a SQL statement using those values, pass it to my report and display it! I am almost sure one should be able to do the same in C#. Confused | :confused:

Can anybody help me with this please!?
Many, MANY thanx! Smile | :)

Willem Le Roux

Tarakeshwar Reddy26-Jun-06 1:15

Re: Crystal reports... with a SQL or format string [modified]

26-Jun-06 1:15

Willem_Le_Roux wrote:
How do I pass the invoice number to the report and have it display all entries of the selected invoice number only?

You have an option in the report to set parameters. You can set a parameter and then you can send the parameter from the dialog box.

You could write a function like this

<br />
private ParameterField AddParameter (string paramName, string paramValue)<br />
{            <br />
  ParameterField paramField= new ParameterField();<br />
  ParameterDiscreteValue paramDiscreteValue = new ParameterDiscreteValue ();<br />
  ParameterValues paramValues = new ParameterValues ();<br />
  paramField.ParameterFieldName = paramName;			<br />
  paramDiscreteValue.Value = paramValue;<br />
  paramValues.Add (paramDiscreteValue);<br />
  paramField.CurrentValues = paramValues;<br />
  <br />
  return paramField;<br />
}<br />

And to add a parameter

<br />
 private CrystalDecisions.Windows.Forms.CrystalReportViewer crResults;<br />
 crResults = new CrystalDecisions.Windows.Forms.CrystalReportViewer();<br />
 <br />
 rptMyReport crReportDocument = new rptMyReport();<br />
 crResults.ReportSource = crReportDocument;<br />
<br />
 //crResults is the CrystalReportViewer object Name<br />
 CrystalDecisions.Shared.ParameterFields paramFields = crResults.ParameterFieldInfo;  <br />
 paramFields.Add(AddParameter("paramName",strValue));	<br />

Willem_Le_Roux28-Jun-06 1:08

28-Jun-06 1:08

Hi Tarakeshwar!

In future I promise to write a little article on the subject and I will be sure to put your name all over the place. I will also do all future communication via the forums for all to see. Sorry about that my fellow gurus! Frown | :(

I made the requested changes and and the "report.Load(strReportPath);" seems to be working now. Laugh | :laugh:

But I am still having a problem with the line "paramFields.Add(AddParameter(PARAMETER, strTransactNo));" When I run the application it states that "Object reference not set to an instance of an object". WTF | :WTF:

Willem Le Roux

I wish that the designers of programming languages would start writing their error messages in English... Confused | :confused:

-- modified at 7:30 Wednesday 28th June, 2006

Tarakeshwar Reddy28-Jun-06 1:35

28-Jun-06 1:35

Have you added a crystal report viewer to your screen and named it as crystalReportViewer? I amnot sure why your getting that error.

Can you debug and tell me the exact point your getting this error and if you can put a try catch and paste the error here.

Willem_Le_Roux28-Jun-06 2:04

28-Jun-06 2:04

My Crystal Report Viewer is the only control on my frmReport form. The Crystal Report Viewer's name is "crystalReportViewer".

The try/catch is showing the following error:
System.NullReferenceException: Object reference not set to an instance of an object. At ProgName.frmReport.ConfigReport() in D:\ProgName\ProgName\frmReport.cs:line 47

And the line of code on Line 47 is
paramFields.Add(AddParameter(PARAMETER, strTransactNo));

In despiration I added a few MessageBoxes to see were exactly the error happens. As It runs through AddParameter(string paramName, string paramValue) it seems to catch the exception just before "return paramField;"

Why... I don't know.

Willem Le Roux

Tarakeshwar Reddy28-Jun-06 2:11

28-Jun-06 2:11

I have tried to have a look at it, I am not sure why your getting that error. I would suggest you to see what is the paramName and paramValue inside the AddParameters function, probably its going as null or something.

Willem_Le_Roux28-Jun-06 2:36

28-Jun-06 2:36

My goodness golly me... I dont know. I added the following to AddParameter function...

MessageBox.Show("Param Name: " + "*" + paramName.ToString() + "*");
MessageBox.Show("Param Value: " + "*" + paramValue.ToString() + "*");

and it displayed the following on screen...

Param Name: *TRASNACTNO*
Param Value: *Habula Lodge 2006\06\28 11:22:07 AM*

...seems correct.

I know this is a little beyond the norm and it might be seen as a little bit of "spoon feeding"... which it is I suppose, but is there any possablility that you could email me a little project with a working sample. This way I can compare code and see where I went wrong. I will understand if you say no... Company policies, extra effort and so on.

What ever way this goes, I want to thank you for your patience, time and quick responces! You rock man! Your help is much appreciated!

Willem Le Roux

Tarakeshwar Reddy28-Jun-06 2:42

28-Jun-06 2:42

Actually what I pasted you was from a working code I am using.

Have you declared the Paramenter TRASNACTNO in your crystal report?

And are you sure that your using the same spelling on TRASNACTNO and not TRANSACTNO in one place and TRASNACTNO in other.

Willem_Le_Roux28-Jun-06 3:02