C# Discussion Boards - CodeProject

GeorgeBerry14-Aug-07 1:13

14-Aug-07 1:13

Thanks, now all i have to to is finish the serial port prog im working on, decypher whats going on in that example, and im all set.

George Berry

Data Grid problem

Janu_M13-Aug-07 0:14

Janu_M

13-Aug-07 0:14

Hi I am developing a windows application (VS 2003) in which it contains some buttins and a grid. The Grid has to show all the data from a csv file, for this i am reading all the data from csv file into datatable and giving that datatable as a datasource to data grid.

dtTable = new DataTable();
dtTable.Columns.Add("Name");
dtTable.Columns.Add("Time1");
dtTable.Columns.Add("Time2");
dtTable.Columns.Add("Path");
dtTable.Columns.Add("IconName");
dtTable.AcceptChanges();

if(File.Exists(Application.StartupPath + "\\Recordings.csv"))
{
StreamReader sreader = new StreamReader(Application.StartupPath + "\\File.csv");
string strval = sreader.ReadLine();
while (strval != null)
{
DataRow row1 = dtTable.NewRow();
string[] str = strval.Split(',');
for(int i = 0; i < str.Length; i++)
{
row1[i] = str[i];
}
dtTable.Rows.Add(row1);
strval = sreader.ReadLine();
}
dtTable.AcceptChanges();
sreader.Close();
// }
dtGrid.DataSource = dtTable;
dtGrid.Refresh();

I am using the above code for showing the contents of file to Grid.

if user clicks start button on the form, after completing the action i want to add a row to grid. For this i am writing the new row to the CSV file and calling the above code.

But it is giving error: "Controls created on one thread cannot be parented to a control on a different thread."

Any one please help me.
Thanks in Advance

Re: Data Grid problem

Christian Graus13-Aug-07 0:28

Christian Graus

13-Aug-07 0:28

You need to always deal with your controls in your main thread.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

Re: Data Grid problem

blakey40413-Aug-07 3:30

blakey404

13-Aug-07 3:30

use an event to trigger the creation of your control on the main thread, or use this.InvokeRequired to force you control to be created on the main thread

Re: Data Grid problem

Janu_M14-Aug-07 1:21

Janu_M

14-Aug-07 1:21

Thank you for your reply.

I dont know how to use invoke.

If you know any links regarding the invoke and triggering events please provide them to me.

Thanks in Advance

Thanks and Regards
Ramu

how to change connection string of crystal report.

monuSaini13-Aug-07 0:06

monuSaini

13-Aug-07 0:06

Hello Everybody,

I am not able to change the sql connection string of crystal report.

Actually I had two database one testing and other online database .

I had created the reports on database testing but now i want change it to online database but I am not able to do this.

Regards,

rahul saini

Re: how to change connection string of crystal report.

Colin Angus Mackay13-Aug-07 0:34

Colin Angus Mackay

13-Aug-07 0:34

How do you define your connection string?

Upcoming events:
* Glasgow: Mock Objects, SQL Server CLR Integration, Reporting Services, db4o, Dependency Injection with Spring ...

"I wouldn't say boo to a goose. I'm not a coward, I just realise that it would be largely pointless."

My website

Re: how to change connection string of crystal report.

monuSaini13-Aug-07 0:56

monuSaini

13-Aug-07 0:56

Hi,

Thanks for replying me.

I had define connection string using wizard.

I am working on .net 2005 and using sql 2000 as database.

Regards,

rahul saini

Re: how to change connection string of crystal report.

sathish s13-Aug-07 2:31

sathish s

13-Aug-07 2:31

Rahul,

Try to search for this property setdatabaselogon of the ReportDocument class.

Re: how to change connection string of crystal report.

Colin Angus Mackay13-Aug-07 2:46

Colin Angus Mackay

13-Aug-07 2:46

monuSaini wrote:
I had define connection string using wizard.

*shudder*

Don't! Learn how it works and don't rely on wizards.

Somewhere there should be generated code that contains the connection string. Alter that to get the connection string from the config file.

combo box

costavo12-Aug-07 23:19

costavo

12-Aug-07 23:19

hi all,
how to add data from database table to the combobox,
where i want to read a certain feild and when selected an other feild would be written in somewhere else

Re: combo box

Keith Barrow12-Aug-07 23:35

Keith Barrow

12-Aug-07 23:35

Which technology are you using: Windows Forms, ASP.net, WPF or other?

Re: combo box

Michael Sync12-Aug-07 23:38

Michael Sync

12-Aug-07 23:38

costavo wrote:
how to add data from database table to the combobox,
where i want to read a certain feild and when selected an other feild would be written in somewhere else

SqlConnection dbConn = new SqlConnection ("connectionstring");<br />
            dbConn.Open ();<br />
            SqlDataAdapter da = new SqlDataAdapter ("SELECT town FROM Table", dbConn);<br />
            da.Fill (ds);<br />
<br />
            DropDownList1.DataSource = ds.Table[0];<br />
            DropDownList1.DataBind ();

Thanks and Regards,
Michael Sync ( Blog: http://michaelsync.net)

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Re: combo box

Michael Sync12-Aug-07 23:40

Michael Sync

12-Aug-07 23:40

You can also check my reply here[^].

Hope it helps.

Re: combo box

Nouman Bhatti12-Aug-07 23:56

Nouman Bhatti

12-Aug-07 23:56

in addition to the reply of Micheal sync

u also have to set the display member and value member properties.

set the display member to the field which u want to show.
and set the value member to the field which u want to display at some place else.

and on selectedindexchanged event set show your selected value ...

Re: combo box

costavo13-Aug-07 0:02

costavo

13-Aug-07 0:02

please would u give a code example
regards

Re: combo box

Michael Sync13-Aug-07 16:49

Michael Sync

13-Aug-07 16:49

costavo wrote:
please would u give a code example

As I replied here,[^]

<br />
SqlConnection dbConn = new SqlConnection(connectionString);<br />
<br />
dbConn.Open();<br />
<br />
SqlDataAdapter da = new SqlDataAdapter("SELECT town,postal FROM table1", dbConn);<br />
DataSet ds = new DataSet();<br />
da.Fill(ds);<br />
<br />
dbConn.Close();<br />
<br />
DropDownList1.DataSource = ds.Tables[0];<br />
DropDownList1.DataTextField = "town";<br />
DropDownList1.DataValueField = "postalcode";<br />
DropDownList1.DataBind();

WPF Top level exception handling problem

Keith Barrow12-Aug-07 23:09

Keith Barrow

12-Aug-07 23:09

I have a WPF problem, namely my GUI top level exception handler doesn't:

<br />
public partial class ApplicationWindow : System.Windows.Window<br />
{<br />
  public ApplicationWindow()<br />
  {<br />
    InitializeComponent();<br />
    AppDomain.CurrentDomain.UnhandledException += <br />
    new UnhandledExceptionEventHandler(CurrentDomain_UnhandledException); <br />
 }<br />
<br />
  void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e)<br />
  {<br />
    // Some stuff here that writes to event log*<br />
  }<br />
}<br />

* The code that I've removed from here works when CurrentDomain_UnhandledException is called sucessfully. Also I have try catches round all my top level execution blocks.

The problem I get is intermittant, and has only happened on the live machines Frown | :(

. When I look at the event log, the CurrentDomain_UnhandledException isn't called (there is no event log entry), but I get a .net 2 runtime error:

EventType clr20r3, P1 gui.exe, P2 1.0.2768.23782, P3 46af354c, P4 system.servicemodel, P5 3.0.0.0, P6 4545a17d, P7 109, P8 b0, P9 2ekkxphpp1te4kvupcgmdwsnjepb3jzg, P10 NIL.

I know the error must be from WCF which is referenced by the GUI and have put pretty decent exception trapping in my client code. I really need to know how to capture the execption at the top level in the GUI (have I missed anything?).

Thanks.

C# directX how to getit up?

mercenary0112-Aug-07 22:58

mercenary01

12-Aug-07 22:58

Hi,

I just install directX 9.0b and using VS 2005 but I cannot build any of the directX demo projects found on this site. I have the following error amoung others

The type or namespace name 'DirectX' does not exist in the namespace 'Microsoft

after installing DirectX is it necessay to set a path to it??

Thanks.

Samuel

Re: C# directX how to getit up?

stancrm12-Aug-07 23:09

stancrm

12-Aug-07 23:09

Install DirectX SDK from Microsoft. Add the needed reference to your project. Then add namespace you need to compile it. If you are using VS2005, then just mouse over unknown class, then click at the small box "using DirectX.xxx.xxx.xxx", then namespace will be added automatically.

Re: C# directX how to getit up?

Talal Sultan12-Aug-07 23:11

Talal Sultan

12-Aug-07 23:11

I have never worked with DirectX but just to be sure for others: When you say you installed DirectX, what is it that you installed exactly? The runtime or the SDK? If you didn't install the SDK, there is no chance that any DirectX project will work (I think!) Smile | :)

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UPnP AV Client in C#

N-O-R-B-E-R-T12-Aug-07 22:37

N-O-R-B-E-R-T

12-Aug-07 22:37

Hi,

I'm experimenting on UPnP in Windows Vista Ultimate with Media Center. I've set up a few UPnP AV media servers and could connect to the data from Windows Media Player. But in Media Center I could only browse local files and no files from other UPnP servers.

That's why I'd try to write a C# UPnP client, that uses ALL available AV servers and not only the local storage in Vista MCE.

I've found out there are Intel tools für UPnP, but they are written in C. There is also UPnP support in Platform SDK CE, but I'm using UPnP on a standard PC.

I did not find any UPnP clients in C# here on codeproject. Maybe I've overlooked one in the results or someone of you knows some good external links on how to build a UPnP client in C# (without manually writing the protocol).

Thanks in advance,
Norbert

Re: UPnP AV Client in C#

leppie12-Aug-07 23:39

leppie

12-Aug-07 23:39

The Intel tools have C# stuff too the last time I looked. I didnt work on my router though, so I had to write on myself.

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Re: UPnP AV Client in C#

leppie12-Aug-07 23:40

leppie

12-Aug-07 23:40

Alternatively you can import the UPnP COM library in Windows, and use that.

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how to setup C# TCPClient timeout

George_George12-Aug-07 22:36

George_George

12-Aug-07 22:36

Hello everyone,

I am wondering if I am using TCPClient class in C#, how to setup timeout value? Timeout I mean, when connects to server for the 1st time, and during <timeout> interval, if no server response is received, the GetStream method will return will return other than wait forever.

thanks in advance,
George

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