C# Discussion Boards - CodeProject

Re: read video stream from IP Address on 80 port assigned to DVR

#realJSOP13-Jul-09 1:05

#realJSOP

13-Jul-09 1:05

My guess would be "yes".

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Re: read video stream from IP Address on 80 port assigned to DVR

kunal.tawde13-Jul-09 21:14

kunal.tawde

13-Jul-09 21:14

Request you to please give me some method description of how i can do this in C# or C++/MFC.

c#:how to install new font?

lhong100112-Jul-09 19:00

lhong1001

12-Jul-09 19:00

first:i use two functions to install a new font int the following.

AddFontResource("d:\\tmp\\Ni7seg.ttf"); //FilePath为字体
SendMessage((IntPtr)0xFFFF, WindowsMessages.WM_FONTCHANGE, IntPtr.Zero, IntPtr.Zero);

second:i don't konw how to use the new font.how to set the label's text with the new font?who can give me a example?very thanks

Re: c#:how to install new font?

dan!sh 12-Jul-09 21:44

dan!sh

12-Jul-09 21:44

A label has a font property. You can use that to set the font for the Label text.

Re: c#:how to install new font?

lhong100112-Jul-09 22:15

lhong1001

12-Jul-09 22:15

i know that.i mean i have a font file(.ttf),my program first load this font to memcry.
but i don't know how to let the label to display text with the font.
i know one waw can get it.for exam:

System.Drawing.Text.PrivateFontCollection pfc = new System.Drawing.Text.PrivateFontCollection();
pfc.AddFontFile("d:\\tmp\\Ni7seg.ttf");
Font myFont = new Font(pfc.Families[0], 80f, FontStyle.Regular, GraphicsUnit.Point, 0);

but my program is running in wince that don't support "System.Drawing.Text.PrivateFontCollection".
so who know how to implement this through winapi.

Re: c#:how to install new font?

Pete O'Hanlon12-Jul-09 22:46

Pete O'Hanlon

12-Jul-09 22:46

If you use Reflector, you can easily dig out the internals of how PrivateFontCollection works, and wrap up your own implementation using just the bits you need. (Here's a hint - I just took a quick peek using Reflector and found that adding a new font relies on:

[DllImport("gdiplus.dll", CharSet=CharSet.Unicode, SetLastError=true, ExactSpelling=true)]
internal static extern int GdipPrivateAddMemoryFont(HandleRef fontCollection, HandleRef memory, int length);

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Re: c#:how to install new font?

dan!sh 12-Jul-09 22:53

dan!sh

12-Jul-09 22:53

Not sure. See if this[^] helps. Looks somewhat similar to what you are doing.

Deleting a Registry Key Gives a Security Exception

Richard Andrew x6412-Jul-09 17:37

Richard Andrew x64

12-Jul-09 17:37

My program creates a registry key under HKEY_CURRENT_USER\Software.

There is no problem creating the key or creating values underneath it.

However the framework throws an UnauthorizedAccessException when I try to delete the key using the "DeleteSubKey" method of the RegistryKey class.

The program is running as the same user that created the key.

This is on Vista SP2.

What could I be missing? I thought that a user has total access to keys underneath HKEY_CURRENT_USER?

Re: Deleting a Registry Key Gives a Security Exception

Richard Andrew x6412-Jul-09 17:47

Richard Andrew x64

12-Jul-09 17:47

Never mind!

I found out that I'm supposed to open the key with delete-access to begin with.

Thanks for reading my post.

How do i select the radiobutton depending on the info on my textbox?

daffy_200312-Jul-09 16:31

daffy_2003

12-Jul-09 16:31

hi.
I need help in this.

I have a textbox and two radiobutton.
For example, If the data in the textbox is yes, I want the yes button to be selected. If the data in the textbox is no, the no button is selected.

so far the code i have is this,
if (query returns true)
{
VMradioButton.Checked = true;
TnRradioButton.Checked = false;
}
else{
VMradioButton.Checked = false;
TnRradioButton.Checked = true;
}

please, need help. thanks

Re: How do i select the radiobutton depending on the info on my textbox?

PIEBALDconsult12-Jul-09 17:00

PIEBALDconsult

12-Jul-09 17:00

A) Why? Why not just use the RadioButtons?

B) If the RadioButtons are in the same group, you only need to check one, the framework will uncheck the other(s) for you.

Otherwise, I'd use the TextChanged event of the TextBox and maybe a switch.

Re: How do i select the radiobutton depending on the info on my textbox?

daffy_200312-Jul-09 17:20

daffy_2003

12-Jul-09 17:20

thanks for the reply.
what is switch?
sorry, im a newbie.

Re: How do i select the radiobutton depending on the info on my textbox?

peishen8812-Jul-09 17:36

peishen88

12-Jul-09 17:36

google it, or go to msdn.com search keywork switch . Laugh | :laugh:

Re: How do i select the radiobutton depending on the info on my textbox?

PIEBALDconsult12-Jul-09 18:20

PIEBALDconsult

12-Jul-09 18:20

switch (C# Reference)[^]

Re: How do i select the radiobutton depending on the info on my textbox?

Natza Mitzi12-Jul-09 18:20

Natza Mitzi

12-Jul-09 18:20

Just put them in the same panel or group box and it will be automated

Natza Mitzi

Re: How do i select the radiobutton depending on the info on my textbox?

daffy_200312-Jul-09 18:53

daffy_2003

12-Jul-09 18:53

thanks guys! =)

Issues with adding a web reference using WSDL.exe

Tina P12-Jul-09 13:14

Tina P

12-Jul-09 13:14

Hello guys,

I needed to create a proxy by adding a web reference into my C# class library project, but there's been some issues configuring the thrid party product and the webservice they expose....so I have manually downloaded the WSDL file (its not asmx, its actually java/ibm web service).

Anyways, since i can't use the add web reference wizard from Visual studio anymore, I'd like to know how to I create a porxy (Reference.cs) file in my project using the WSDL file located on my C drive.

Can anyone point me to the right direction, I treid looking into Wsdl.exe but looks like it only support a URL and not a local path, if it does can someone point me to the right command syntax?

I'd appreciate your help.

Thanks
Tina

Re: Issues with adding a web reference using WSDL.exe

Ravi Bhavnani12-Jul-09 15:11

Ravi Bhavnani

12-Jul-09 15:11

I use svcutil.exe[^] to manually generate WCF proxies.

/ravi

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Re: Issues with adding a web reference using WSDL.exe

Tina P12-Jul-09 15:51

Tina P

12-Jul-09 15:51

Hello Ravi, thanks for the response...but I should have mentioned, I'm using VS 2005 framework 2.0.

Can you tell me how do i do that in this environment?

Thanks

Re: Issues with adding a web reference using WSDL.exe

Ravi Bhavnani12-Jul-09 18:27

Ravi Bhavnani

12-Jul-09 18:27

Run the svcutil.exe command line app located in your VS2005 installation folder hierarchy. See the online docs for the app's command line args. svcutil.exe is what runs when you do Add | Service Reference from the VS200x GUI.

/ravi

My new year resolution: 2048 x 1536
Home | Articles | My .NET bits | Freeware
ravib(at)ravib(dot)com

Entity Framework: Create new Object (when relation exists)

TheShihan12-Jul-09 12:58

TheShihan

12-Jul-09 12:58

Hi,

I'm trying to figuring out how to add an object (insert a new row), when the object is related to another entity.

Eg.: I have a user entity, each user can have a title ("Mr.", "Ms.", "Dr.", etc.) or no Title assigned at all.
Entity Model

So you see, the user entity is mapped to the the title entity. Navigation properties exist also (directly generated from the wizard).

In the database, the tables look like this:
DB diagram

The user table has a column "title_id" which is the foreign key for the primary key of the table "titles".

My question is now, how do I add a new user object and directly associate it with an existing title.

I tried various ways, but I get different exceptions when attaching the user entity to the Context. Eg.:

{System.InvalidOperationException: The object cannot be added to the ObjectStateManager because it already has an EntityKey.}

"An object with the same key already exists in the ObjectStateManager. The existing object is in the Unchanged state. An object can only be added to the ObjectStateManager again if it is in the added state."

My create user method looks like this:

public int CreateUser(User user)
{
    this.context.AddToUsers(user);
    this.context.SaveChanges();

    return user.UserId;
}

... where I've previously assigned the desired "Title"-Entity to the passed User-Entity, eg:

user.Title = dataAccess.GetTitleByTitleId(titleId);

So, I guess the problem is in this part.. as this given Title-Entity modifies the User-Entity in a undesired way. I've also tried to get rid of the "Title"-navigation property and add the "TitleId" property direclty to the "User" entity, so I could simple assigne the desired "TitleId" to the user (user.TitleId = titleId;), but this gives me various validation errors in the entity model designer.

Does anybody know how to do this (simple task?) in a correct way?

Thanks, Shi

WIA with Vista...

Jacob Dixon12-Jul-09 10:08

Jacob Dixon

12-Jul-09 10:08

Am I just crazy or is it kind of hard to find a sample on using WIA with a digital camera.. I also read something that you might not be able to do this with Vista?

I got my camera to take a picture...

Item pic;
ImageFile myImg;

pic = _Device.ExecuteCommand(CommandID.wiaCommandTakePicture);
myImg = (ImageFile)_Device.Items[0].Transfer(FormatID.wiaFormatJPEG);


PictureBox picBox = new PictureBox();
picBox.Dock = DockStyle.Fill;
picBox.Image = (Image)myImg.FileData;
this.Controls.Add(picBox);

But on trying to Transfer I get:

Exception from HRESULT: 0x8021006B

Re: WIA with Vista...

Jacob Dixon12-Jul-09 14:45

Jacob Dixon

12-Jul-09 14:45

Sorry I meant I'm getting a NullReferenceException.

Re: WIA with Vista...

Jacob Dixon12-Jul-09 15:28

Jacob Dixon

12-Jul-09 15:28

Whatever I do it always returned null!

Re: WIA with Vista...

Sean Devoy26-Aug-09 14:44

Sean Devoy

26-Aug-09 14:44

I realize this is a little old, but maybe this will help others. My code is in VB but does not take much to convert to C#.

In XP this code takes and saves a picture:

item = dev.ExecuteCommand(CommandID.wiaCommandTakePicture)
Dim myImage As WIA.ImageFile = CType(item.Transfer(format), WIA.ImageFile)
myImage.SaveFile("c:\somewhere\mypicture.jpg")

But in Vista "item" is ALWAYS NULL but it does take the picture on the camera.

here is my fix:

' get current image count
Dim cnt As Int32 = dev.Items.Count

'take picture
 item = dev.ExecuteCommand(CommandID.wiaCommandTakePicture)

 ' insert this single if block
 If IsNothing(item) Then
   ' Vista drops the ball here (and a lot of other places!)
   '  Loop for up to 10 seconds waiting for the image to appear on camera device
    While dev.Items.Count = cnt And x < 10
       System.Threading.Thread.Sleep(1000)
       x+= 1
    End While
    If cnt = dev.Items.Count Then
         'throw your exception here - no image arrived
    Else
         ' we found the new image on the camera
         ' pull it into the "item" variable since Vista didnt
         item = dev.GetItem(dev.Items(cnt - 1).ItemID)
    End If
End If
' and the rest of the code is unchanged.

Hope that helps.

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