C# Discussion Boards - CodeProject

Re: picturebox binding

tarasn29-Jan-06 21:34

tarasn

29-Jan-06 21:34

You can bind picturebox using Format event

<br />
...<br />
// your code goes here<br />
...<br />
Binding binding = new Binding("Image", dsStudent, "Students.Photo");<br />
binding.Format+=new ConvertEventHandler(binding_Format);<br />
pictureBox.DataBindings.Add(binding);<br />

And in Format event you must convert byte [] array to Image

<br />
private void binding_Format(object sender, ConvertEventArgs e)<br />
{<br />
	using(MemoryStream stream = new MemoryStream((byte [])e.Value))<br />
	{<br />
		e.Value = Image.FromStream(stream);<br />
	}<br />
}<br />

DevIntelligence.com - My blog for .Net Developers

Table Adapter is not really updating the database

emran83429-Jan-06 5:35

emran834

29-Jan-06 5:35

Hi all,
I am new to C#, I have learned how to drag a datasource table to Form and attach Binding navigator to show the data. Everything is working nice. But when I add, change or delete something and after that when I click SAVE button, I always see that nothing is being updated within the database. I have no clue what may be the reason. Can you help me please.

Thanks all,
Huss. Emran

Multiple selection listview - how to tell which item was selected last

shubi29-Jan-06 5:08

shubi

29-Jan-06 5:08

Hello there,

I've been trying to solve the following problem for quite a while with no success :-/

Here is the situation: my form contains a multiple-selection ListView control and a simple textbox. The textbox shows the concatenation of all the selected items (the first sub item of each ListViewItem).

Now here is my problem - when I drag-and-select items in the list view (which can get REALLY big ; about 500 items), the SelectedIndexChanged event fires whenever a new item is selected. Thus, the process of concatenation occurs from the beginning at each time. For example, if I drag 10 items, the event fires 10 times, but each time the count of selected items grows, and thus the concatenation occurs for 1, 2, 3, 4, 5 and so forth until 10. Same goes when dragging over 100 items. Mad | :mad:

I know string concatenation is heavy but that is not the problem here.

I can't find way to tell which item was selected last. D'Oh! | :doh:

ListView.FocusedItem won't help since I'm not using the keyboard nor clicking on specific items.

Please help… WTF | :WTF:

Re: Multiple selection listview - how to tell which item was selected last

S. Senthil Kumar29-Jan-06 8:30

S. Senthil Kumar

29-Jan-06 8:30

Did you try using the SelectedItems[^] property instead? You can then simply use the last item in the collection returned by that property.

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

Re: Multiple selection listview - how to tell which item was selected last

michaelbaylon30-Jan-06 3:58

michaelbaylon

30-Jan-06 3:58

but what if I drag upward?

update problem

kings_129-Jan-06 3:18

kings_1

29-Jan-06 3:18

hi there ,

in my program i have the Order Form (win Form)
in this form i have some textbox and grid

know the grid is bound the a dataset on the grid i have some filds like productID,Qunataty,UnitPrice,Total

i am filling all the data on the Form and the order is insert well to the db

now if i want to change something in this particular order i select the order detiles from the db by OrderId num
an all the order detiles are displayd on the Form

the problem is when i want to add products to the order
the product detiles that is bound to the datagrid is updated but the OrderId is not

this is the code :

if(dsOrdersDetiles1.HasChanges()==true)
{

AdOrdersDetiles.Update(dsOrdersDetiles1.Tables[0]); //only the data in the grid is update but i need the OrderId to be update in the same row .

}

how can i update order detiles when the filds are not bound ?

WaitForExit() Give me Error ( Another installation is in Progress )

Amal ElHosseiny29-Jan-06 2:24

Amal ElHosseiny

29-Jan-06 2:24

I ve class library ( installer class ) , i load embedded resource on hard desk to execute within setup. breifly , installer class execute 3 msi as embedded resources .. it was working but now it gives me error that there is another installation in progress and i ve to finish this installation before the current one.

this function that i ve to load MSI files:

void LoadMSI (string sResourceName)
{
if(!Directory.Exists (Context.Parameters ["Temp"]))
Directory.CreateDirectory (Context.Parameters ["Temp"]);
FileStream stmTemp=new FileStream (Context.Parameters ["Temp"]+sResourceName,FileMode.Create);
Stream sOurFile=Assembly.GetExecutingAssembly().GetManifestResourceStream (Assembly.GetExecutingAssembly ().GetName().Name+"."+sResourceName);

EventLog.WriteEntry("CRM","Length Of :"+sResourceName+" is "+sOurFile.Length.ToString ());

BinaryWriter bw=new BinaryWriter(stmTemp);
BinaryReader br=new BinaryReader (sOurFile);
byte[] bTemp=new byte[(int)sOurFile.Length];

bTemp=br.ReadBytes((int)sOurFile.Length );
br.Close ();
bw.Write (bTemp);
bw.Close();
stmTemp.Close();
Process pTemp=Process.Start (stmTemp.Name );

pTemp.WaitForExit ();

}

and this install override :

public override void Install(IDictionary stateSaver)
{
// scenario : load files in temp folder then execute it
LoadMSI ("DBSetup.msi");
LoadMSI("EmpowerServiceSetup.msi");
LoadMSI("EmpowerWebSetup.msi");

}

Amal ElHosseiny

Delete Temporary Internet Files using c#

realmontanakid29-Jan-06 1:58

realmontanakid

29-Jan-06 1:58

Hi
I try to delete my Temporary Internet Files using C# Code.
I thought.. no problem, but the only file that was found is the desktop.ini...
No other files in that Directory..

<br />
        private void button1_Click(object sender, EventArgs e)<br />
        {<br />
<br />
            string dir= Environment.GetFolderPath(Environment.SpecialFolder.InternetCache);<br />
<br />
            foreach (string fileName in Directory.GetFiles(dir))<br />
            {<br />
                File.Delete(fileName);<br />
            }<br />
        }<br />

Re: Delete Temporary Internet Files using c#

Guffa29-Jan-06 2:55

Guffa

29-Jan-06 2:55

Under what user account are you running the code? Each user account have their own cache folder for Internet Explorer.

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Re: Delete Temporary Internet Files using c#

realmontanakid29-Jan-06 3:05

realmontanakid

29-Jan-06 3:05

Hi
It's an account where the User is in the administrator group.

Re: Delete Temporary Internet Files using c#

Guffa29-Jan-06 3:40

Guffa

29-Jan-06 3:40

Are you sure? Check the contents of the Environment.UserName property.

---
b { font-weight: normal; }

Re: Delete Temporary Internet Files using c#

usernamed29-Jan-06 9:42

usernamed

29-Jan-06 9:42

Have you looked under C:\WINDOWS\TEMP\Temporary Internet files?

Re: Delete Temporary Internet Files using c#

tarasn29-Jan-06 3:48

tarasn

29-Jan-06 3:48

I found few articles that solves your problem : http://www.codeproject.com/csharp/ponta.asp[^]

Another one can be found here http://www.codeguru.com/cpp/i-n/ieprogram/article.php/c1245/[^] but you must port this solution to C#

DevIntelligence.com - My blog for .Net Developers

ISDN control through C#

Mustafa Ismail Mustafa28-Jan-06 22:39

Mustafa Ismail Mustafa

28-Jan-06 22:39

I've been trying to find some sort of Wrapper DLL for CAPI 1.1/2.0 functions for C#/.NET framework but I couldn't find anything of the sort.. anyone have a clue where I can begin to look? I really don't want to dive into the quagmire of developing my own DLL for this stuff.

Any help is very much appreciated, thanks

Got a coding problem? Hand it to the CodeDevil!

Voice Chat,Audio Streaming

User 209307328-Jan-06 20:42

User 2093073

28-Jan-06 20:42

Hello everybody...
I have a TCP/IP client/server chat application.I want to add voice chat feature to my application.What is the start point ?
How can I implement this feature in c# ? How can I implement audio streaming in c# ? Please guide me. Confused | :confused:

Note : My application works on LAN and is not on internet.
Best Regards,
XironiX

[ _ Always there is another way _ ]

Re: Voice Chat,Audio Streaming

Dario Solera29-Jan-06 6:37

Dario Solera

29-Jan-06 6:37

First you have to capture the audio. Try search 'audio capture' here on CP and you'll find many interesting articles.
Then you have to design some application protocol to compress and encapsulate audio data and stream it to the other host, maybe adding silence-suppression algorthms.
There are many mpeg libraries on the net, you should choose one simple to use.

Trust me, this is not simple at all.

___________________________________
Tozzi is right: Gaia is getting rid of us.
My Blog [ITA]

Re: Voice Chat,Audio Streaming

User 209307330-Jan-06 1:03

User 2093073

30-Jan-06 1:03

Thanx for your answer...
Did you heared anything about Microsoft Media Service. Do you know that can I use Media Player SDK to do streaming ?
Best Regards,
Xironix

[ _ Always there is another way _ ]

saving image files from child forms

edel_ong28-Jan-06 19:08

edel_ong

28-Jan-06 19:08

hi.good day.just would like to ask..how can i save something into an image file(into jpg etc.) that is in the child form?thnx!

Re: saving image files from child forms

CWIZO29-Jan-06 0:03

CWIZO

29-Jan-06 0:03

Well, I don't know what the problem is...
Search MSDN for Bitmap class and have a look at its methods...

Q:What does the derived class in C# tell to it's parent?
A:All your base are belong to us!

web browser

sianatia28-Jan-06 18:37

sianatia

28-Jan-06 18:37

hi,

how can i track the downloading of images from web browser control used in my application,i used begindownload event but i couldn't get the url of the image,
thanks.

Web Service Directory

Guinness4Strength28-Jan-06 17:30

Guinness4Strength

28-Jan-06 17:30

Is there anyway to get or reference the local directory a web service is located in ?
i.e. similar to Application.StartupPath ?

Re: Web Service Directory

Dave Kreskowiak28-Jan-06 19:02

Dave Kreskowiak

28-Jan-06 19:02

A web service is a variant of an ASP.NET weg application. It doesn't "come alive" until it's called by some consumer and instantiated. There is no "StartupPath".. You could look into using Server.MapPath(), but web services are not my strong suit.

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

Re: Web Service Directory

Guinness4Strength29-Jan-06 4:46

Guinness4Strength

29-Jan-06 4:46

Right, I need to get the local path reference within the service during runtime, so I'm not worried about it not being instantiated. I'll look into MapPath(), thanks.

Re: Web Service Directory

Guinness4Strength29-Jan-06 7:36

Guinness4Strength

29-Jan-06 7:36

Well it appears the Server.GetPath() method is useful from a client perspective, but I need to get the local path in the service. Any other suggestions ?

Re: Web Service Directory

Guinness4Strength29-Jan-06 9:11

Guinness4Strength

29-Jan-06 9:11

I was wrong...just had to pass null as the path...thanks Dave.

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