C# Discussion Boards - CodeProject

Colin Angus Mackay13-Oct-04 22:48

13-Oct-04 22:48

How about MSDE? It is basically a SQL Server Engine, but limited to about 5 or 10 concurrent connections, and you can redistribute your application with the MSDE engine at no extra cost.

Also, if you are going to create a database application you might want to consider improving your spelling ability. The following words are all misspelled: distrebuted fileds coz resons thnx

Do you want to know more?

Vogon Building and Loan advise that your planet is at risk if you do not keep up repayments on any mortgage secured upon it. Please remember that the force of gravity can go up as well as down.

Re: Dictionary on cd

Anonymous14-Oct-04 1:50

Anonymous

14-Oct-04 1:50

thnx

Tab Control

mathon13-Oct-04 21:59

mathon

13-Oct-04 21:59

Hello,

Unfortunately, in the ".NET Compact Framework Programming with C#" is the TabControl not explained so I have five questions referring to the TabControl on Smart Device Application:

1) How can I when I go from another Form1. to the Form with the TabControl to select an initial TabPage?

2) When I want to create a special control for a TabPage which I cannot design with the VS.NET Designer in the corresponding tabPage, what do I have to quote that the Control is on the certain tab page?

3) When I click from one tabPage (JobDetails) to another tabPage (ClientDetails) the SelectedIndexChanged Event is occured. But how can I indicate in this event that I want for example to the ClientDetails tab Page?

4) How can I take over a parameter from one tabPage to another tabPage?

5) Is it difficult to give a certain tab page a background colour?

Hopefully anybody find time for these questions..:-/

Best Regards

mat

Re: Tab Control

Alex Korchemniy14-Oct-04 9:50

Alex Korchemniy

14-Oct-04 9:50

1) Just show the right form. Set the SelectedIndex to the tab you want.

2) Confusing question but i'll try. If you want to know what tabpage a control is on go control.Parent. If you are trying to add designer support search google.

3) After the event occurs you can check the selectedtab or selectedindex. The eventargs don't have any additional info.

4) ???

5) No. Just get the TabPage you want and change the Background like you do on everything else.

adding combo box and data picker in DataGrid

shambho13-Oct-04 21:24

shambho

13-Oct-04 21:24

hi guys,

I am building a employee data base management system with lot of datagrid. Its basically a windows app. I am building the whole application in 3 tier architecture. I want to add a combo box to the datagrid. i got some sample from net. They are saying abt adding datagridTextcolumn in datagrid table styles. I tried adding that. No errors but not results i cannot see the combo box. how can i exactly put the combo box in the right cell. How can i map them i tried mapping properties but it does not work and will not work as i am filling dataset using a function in the wrapper class to get a dataset and setting this as the datasource to the grid. so how can i do that any ideas. is my question a bit confusing or vague. sorry for that. how can i do that plz tell me a neat way of doing that.

thanks in advance

anand

anand

Altering the word wrap in a multiline text box / rich text box

Jay Shankar13-Oct-04 20:50

Jay Shankar

13-Oct-04 20:50

I want to fix the line of 50 bytes (Or 50 characters) each in the text box.

I searched the info using Google. Unfortunately, I could not get any C# examples for achieving so.

Where as I could find some similar examples in VB, which are as below:

http://www.developerfusion.com/show/1052/

http://www.developerfusion.com/show/1052/

http://www.vbcity.com/forums/topic.asp?tid=79766

http://vbvbvb.com/jp/gtips/0701/gSendMessageEmSetwordbreakprocRepression.html

I need help in converting the code in C# or.
similar examples in C#.

Regards,

Jay

Desktop context menu?

ting66813-Oct-04 20:48

ting668

13-Oct-04 20:48

Hi~

Can I add item to "new" of the desktop context menu?

Thanks

rearange combobox

rolandf6913-Oct-04 20:19

rolandf69

13-Oct-04 20:19

Hi,

I can't figure out how the textbox 'knows' where to draw. Can I get a handle to that rectangle and 'move' it over?

thanks,
Roland

File Copy to network share

tmonte13-Oct-04 17:44

tmonte

13-Oct-04 17:44

Is there any way I can login to a remote machine from code to allow for a file copy?

If the folder is mapped and connected (entering username/password) it works fine copying to "\\server\share\filename" But if not, I get access denied exception.

Uniqueidentifier

pat27088113-Oct-04 12:19

pat270881

13-Oct-04 12:19

Hello,

I want to save the name of the company in the textBox2. The problem which occur is with the JobId. I will get the JobId number from a previous page as a string. Here I have quoted an example JobId. (the JobIds are saved in the database as uniqueidentifier). The Problem occurs in the ExecuteReader. I think it concerns that the parameter @JobId is of type uniqueidentifier and the the quoted jobId here is from type string. So it occurs a Data conversion failed. error.

jobId = "D4DF269F-F9FB-4C88-A005-11C98B38818A";

this.dataSource = "\\Program Files\\MobileHelpDesk.sdf";
this.strConn = "Data Source = " + dataSource;
this.connection = new SqlCeConnection("Data Source = " + dataSource);

SqlCeCommand command = new SqlCeCommand();
command.Connection = connection;

command = connection.CreateCommand();

command.CommandText = "SELECT c.CompanyName, c.ContactLName FROM Client c INNER JOIN JobDescription p ON p.EmailClient = c.Email WHERE p.JobId = ?";
command.Parameters.Add( "@JobId", jobId);

connection.Open();
drdrDB = command.ExecuteReader();

while (drdrDB.Read())
{
textBox2.Text = drdrDB["JobId"].ToString();
}
drdrDB.Close();
connection.Close();

Does anybody know how can I solve this problem or parse the jobId string in the corresponding type?? or is there another error? But the Select String is correct, I tried it in VS.NET.

thx

patrick

Re: Uniqueidentifier

Colin Angus Mackay13-Oct-04 13:42

Colin Angus Mackay

13-Oct-04 13:42

The parameter value needs to be a System.Guid[^] if the SQL Server type is a uniqueidentifier.

For example:

Guid jobGuid = new Guid(jobId);
command.Parameters.Add("@JobId", jobGuid);

Do you want to know more?

Vogon Building and Loan advise that your planet is at risk if you do not keep up repayments on any mortgage secured upon it. Please remember that the force of gravity can go up as well as down.

Re: Uniqueidentifier

pat27088113-Oct-04 21:57

pat270881

13-Oct-04 21:57

Thank you very much, now it works!

patrick

Controlling Video Streaming in a Web App

El Queso13-Oct-04 11:51

El Queso

13-Oct-04 11:51

I have received a request from a client to limit the amount of streaming video that users can download from their site. A company has its own webspace, but leases space and bandwidth from an ISP when users at the company click on links to watch videos.

I can imagine an object that doles out "streaming objects" that know how much data they have streamed, and when the limit is achieved no more "streaming objects" are allowed to be created.

Problem is, I don't know if there is anything server-side that I can use to stream the files to the client.

Can anyone point me in the right direction?

Re: Controlling Video Streaming in a Web App

yoaz14-Oct-04 6:58

yoaz

14-Oct-04 6:58

i think u'r pointer is looking for a "Traffic Shaper". i don't know of open source code one

there are no facts, only interpretations

Dynamic property editor - design time

Lech Cieslar13-Oct-04 11:46

Lech Cieslar

13-Oct-04 11:46

Hi.
I've been looking everywhere for sample source to help out with dynamic properties. I want to create a new custom control that contains a new property closely replicating the standard (DynamicProperties) property in MS controls. I want to be able to either create it from scratch or somehow override the behaviour of the (DynamicProperties) property to allow the control to use a global value whenever an object is instantiated from the same control class. As per current (DynamicProperties), each time the code is compiled a reference will need to be compiled into the InitializeComponent for each selected Dynamic Property.

Thanks in advance
Les

Les

Searching for IO Control Codes

BoxenBiene13-Oct-04 10:53

BoxenBiene

13-Oct-04 10:53

Hi all I'm again.

I'm looking for the Input and Output Control Codes for the following Consts:

IOCTL_CDROM_GET_CONTROL
IOCTL_CDROM_PAUSE_AUDIO
IOCTL_CDROM_PLAY_AUDIO_MSF
IOCTL_CDROM_RAW_READ
IOCTL_CDROM_READ_TOC
IOCTL_CDROM_RESUME_AUDIO
IOCTL_CDROM_SEEK_AUDIO_MSF
IOCTL_CDROM_STOP_AUDIO

I can't find any information about the control codes. I've searched in the MSDN in different foren, in the Plattform SDK and in the Windows DDK. I only get the Consts like listed on top of this thread but nowhere the Codes.

The main problem is, that the API "DeviceIOControl" needs the Control Codes.

Hope, that someone can help me.

Thanks in advance

BB

Re: Searching for IO Control Codes

Dave Kreskowiak14-Oct-04 3:07

Dave Kreskowiak

14-Oct-04 3:07

If you install the Platform SDK (BIG install!), you can search the header files (*.H) for the constants your looking for. They probably show up like:

#define IOCTL_CDROM_GET_CONTROL 0x0400

or something very similar.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Re: Searching for IO Control Codes

BoxenBiene14-Oct-04 8:04

BoxenBiene

14-Oct-04 8:04

Thanks men.

Now I know my problem. I haven't got the full Platform SDK.

Best wishes

BB

changing cursor when hover over listview item subitem

vista2713-Oct-04 10:44

vista27

13-Oct-04 10:44

what i'm trying to do is change the cursor from arrow to a hand when i hover over a particular subitem in my listview. catching a listview mouse_down event passes you in mouseEventArgs, from which you can get an X and Y coordinate, which u can then pass to GetItemAt and get back that particular subitem you clicked on. i naturally thought a mouse_enter/leave/hover would work in the same way, but no mouseeventargs are passed in. so how do i go about finding out which subitem i'm hovering my cursor over if i get no x and y coordinates? thanks!

Re: changing cursor when hover over listview item subitem

MrEyes14-Oct-04 2:13

MrEyes

14-Oct-04 2:13

I recently did something similar to this, but my aim was to display tooltips for each ListViewItem (the tooltip data is contained in the ListViewItem.Tag property). I used the MouseMove event.

The following code could easily be modified to change the cursor or perform any other task:

private ToolTip lviTip = new ToolTip();
...
private void myList_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{
	ListViewItem lvi = myList.GetItemAt(e.X, e.Y);
	if (lvi != null)
	{
		string tipText = lvi.Tag.ToString();

		lviTip.SetToolTip(myList, tipText);
	}
	else
	{
		lviTip.SetToolTip(myList, string.Empty);
	}
}

post.mode = postmodes.signature;
SELECT everything FROM everywhere WHERE something = something_else;
> 1 Row Returned
> 42

Translating Win32API and their Structs problems

BoxenBiene13-Oct-04 10:42

BoxenBiene

13-Oct-04 10:42

Hi all,

I want to use the Windows API "DeviceIOControl" for reading the TOC of a inserted CDRom.
Therefor I need some structs with wich i have a lot off problems to translate.

Is anybody able to help me?

The API "DeviceIOControl":

BOOL DeviceIoControl(
HANDLE hDevice,
DWORD dwIoControlCode,
LPVOID lpInBuffer,
DWORD nInBufferSize,
LPVOID lpOutBuffer,
DWORD nOutBufferSize,
LPDWORD lpBytesReturned,
LPOVERLAPPED lpOverlapped
);

The following structs are needed:

typedef struct _CDROM_TOC
{
UCHAR Length[2];
UCHAR FirstTrack;
UCHAR LastTrack;
TRACK_DATA TrackData[MAXIMUM_NUMBER_TRACKS];
} CDROM_TOC, *PCDROM_TOC;

typedef struct _TRACK_DATA
{
UCHAR Reserved;
UCHAR Control : 4;
UCHAR Adr : 4;
UCHAR TrackNumber;
UCHAR Reserved1;
UCHAR Address[4];
} TRACK_DATA, *PTRACK_DATA;

typedef struct __RAW_READ_INFO
{
LARGE_INTEGER DiskOffset;
ULONG SectorCount;
TRACK_MODE_TYPE TrackMode;
} RAW_READ_INFO, *PRAW_READ_INFO;

Or has anybody a better thought?

Thanks in advance

BB

Re: Translating Win32API and their Structs problems

yoaz14-Oct-04 7:10

yoaz

14-Oct-04 7:10

you surely tried translating all pointers to

IntPtr<code>, handles words to int's, UCHAR to byte, etc.? What specifically is the problem? <br />
<br />
there are no facts, only interpretations

Re: Translating Win32API and their Structs problems

BoxenBiene14-Oct-04 8:01

BoxenBiene

14-Oct-04 8:01

Hi,

You detect the main problem that I have. In the Help for examaple I have found, that the meaning for UCHAR is Unsigned CHAR. That' what I don't understand.

So if you are able to complete the list you have started or you can tell me where to find the exact translation I was delited.

Thanks in advance

BB

Re: Translating Win32API and their Structs problems

yoaz14-Oct-04 8:41

yoaz

14-Oct-04 8:41

hope this helps:

struct _CDROM_TOC
{
	byte[] Length = new byte[2];
	byte FirstTrack;
	byte LastTrack;
	TRACK_DATA TrackData[MAXIMUM_NUMBER_TRACKS];
}

struct TRACK_DATA 
{
	byte Reserved;
	byte Control;
	byte Adr;
	byte TrackNumber;
	byte Reserved1;
	byte Address[4];
} 

struct RAW_READ_INFO 
{
	Int64 DiskOffset;
	UInt32 SectorCount;
	TRACK_MODE_TYPE TrackMode;
}

I'm not sure that LARGE_INT translated to Int64 but it should, otherwise define a struct to hold it (check it out at MSDN). You also didn't specify what is TRACK_MODE_TYPE structure.
Try checking out MSDN documentation on the Marshal class

there are no facts, only interpretations

ListView Add Data

mfcuser13-Oct-04 10:06

mfcuser

13-Oct-04 10:06

I have my listview where I plot some data. I want to show the data to a table, so I am using listview. I do have problem using the subitem function. I can show my x data to the fist column, however I am having problem to show the y data to the next column

here is my code

<br />
private void button1_Click(object sender, System.EventArgs e)<br />
		{<br />
			double[] dData  = new double[200];<br />
			double[] dData2 = new double[200];<br />
<br />
			for(int i=0;i<200;i++)<br />
			{<br />
				dData[i]  = Math.Sin(0.09*i);<br />
				dData2[i] = Math.Cos(0.1*i);<br />
				listView1.Items.Add(i.ToString()); //show the x data to the fist colunm however I couldn't find a way to show the sine and the cosine to the next colunm<br />
				<br />
			}<br />
			waveformPlot1.PlotY(dData);<br />
			waveformPlot2.PlotY(dData2);<br />
		}<br />

so my output looks like that
col 1 col 2 col 3
0 blank blakk
1 blank blank

show how can I show subitem in the listview

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