Exposing a control through a property - C# Discussion Boards

QzRz3-Apr-05 0:42

3-Apr-05 0:42

okay...

Can you show me how to use the IE in my application?
I can load the file into the users internet browser, but thats not what I want.

Or

How to show the it using the HttpRequest, but the file I want to show, is only on the users computer, not on a server.

QzRz

update problem

webhay31-Mar-05 9:29

webhay

31-Mar-05 9:29

Hi all ,

i got this exception "Operation must use an updateable query."

When i tried to work with this code

OleDbConnection AccessCnn2 = new OleDbConnection("Jet OLEDB:Global Partial Bulk Ops=2;Jet OLEDB:Registry Path=;Jet OLEDB:Database Locking Mode=0;Jet OLEDB:Database Password=;Data Source=\"e:\\Fuu\\data_RWable.mdb\";Password=;Jet OLEDB:Engine Type=5;Jet OLEDB:Global Bulk Transactions=1;Provider=\"Microsoft.Jet.OLEDB.4.0\";Jet OLEDB:System database=;Jet OLEDB:SFP=False;Extended Properties=;Mode=Read;Jet OLEDB:New Database Password=;Jet OLEDB:Create System Database=False;Jet OLEDB:Don't Copy Locale on Compact=False;Jet OLEDB:Compact Without Replica Repair=False;User ID=Admin;Jet OLEDB:Encrypt Database=False");  <br />
				AccessCnn2.Open();<br />
				OleDbCommand myCmd_Access2 = new OleDbCommand(); <br />
				myCmd_Access2.Connection = AccessCnn2; <br />
				myCmd_Access2.CommandType = CommandType.Text;<br />
				<br />
				// Mark invoces with the exported date<br />
				myCmd_Access2.CommandText = "Update [INVOICE HEADER TABLE] Set [INVOICE HEADER TABLE].[INVNOTE]='"+DateTime.Now.ToString()+"' Where [INVOICE HEADER TABLE].[INVNOTE] is null";<br />
				myCmd_Access2.ExecuteNonQuery();<br />
				AccessCnn2.Close();

help please
Regards
todary

Re: update problem

Mike Dimmick31-Mar-05 10:28

Mike Dimmick

31-Mar-05 10:28

This often means that the file cannot be written to by the account that the code is running under. Check your NTFS permissions for the file and the folder it's in.

If the operation succeeds for the first attempt to open a connection but fails subsequently, it often means that Jet cannot write to the log file in which it tracks concurrent operations (a file with the same name but a .ldb extension, in the same directory).

Stability. What an interesting concept. -- Chris Maunder

Tracking External Application Windows

yeela31-Mar-05 9:20

yeela

31-Mar-05 9:20

I would like to write an application that overlays information on external application windows.
My plan is to draw the information on a transparent window that is positioned over the external application window. In order to do that I would like to track some information from the external application, like position, size and z-order so I can reposition the transparent window accuratly. Ideally I would like a way to read these parameters and get events when the parameters changes.

I would like to write my application in csharp. How could this be done? Is there a way to accomplish this using the .net API or do I have to use the native Windows API? Is there perhaps a simplier way to accomplish the same task? Does anyone have any references to source code which solves the problem (or a similar problem).

Convert Javascript to C# Code

kornstyle31-Mar-05 8:39

kornstyle

31-Mar-05 8:39

I found some Javascript code on the Internet and it works very well for what I need to use it for. I want to do the same thing in c# code. Does anyone know of a program that converts javascript to c# code? If not does anyone know how to run javascript from a c# program?

Re: Convert Javascript to C# Code

Richard Parsons31-Mar-05 8:46

Richard Parsons

31-Mar-05 8:46

Look into these methods for running javascript from within your asp.net app.

RegisterClientScriptBlock()
RegisterStartupScript()

-Richard

Re: Convert Javascript to C# Code

Judah Gabriel Himango31-Mar-05 9:00

Judah Gabriel Himango

31-Mar-05 9:00

One thing you can do is compile the JavaScript code as JScript.NET (look at jsc.exe compiler in the DotNet SDK).

Once compiled as .NET code, C# code could call the JScript.NET functions without hassle.

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: He has a funny face. And he's my son.
Judah Himango

Exposing a control through a property

Richard Parsons31-Mar-05 8:26

Richard Parsons

31-Mar-05 8:26

Hello everyone. I have an interesting problem that I need help with. I'm sure someone else has already had this problem. I have a custom control (either win or web because I have both doing this) and this control contains other controls such as a label and richtextbox. Well I have a few public properties that set properties on the internal controls but I also have a property that exposes the internal control as a property. My problem is that when I goto the designer and set properties though the control exposed though the property none of the settings are kept, however if I set the properties on the exposed control in code behind everything works fine.

Any help would be apprciated
-Richard

Re: Exposing a control through a property

spif200131-Mar-05 19:54

spif2001

31-Mar-05 19:54

[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)] makes sure it is saved - put that in front of your control property

Re: Exposing a control through a property

spif200131-Mar-05 20:02

spif2001

31-Mar-05 20:02

if u have custom properties on that control property, be sure to use [DefaultValue(false)] on the properties if they are primitive types (int,string etc.).

If u have object properties use the [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)] attribute and go into that object and use the [DefaultValue(false)] attribute.

etc. etc.

Matching visual lines in RTF with internal Lines?

LongRange.Shooter31-Mar-05 8:10

LongRange.Shooter

31-Mar-05 8:10

I have an RTF which is being used do text editing. When an existing text document is placed in the control, it automatically adjusts lines based on the text fitting inside the window. However when I issue a editWindow.GetLineFromCharIndex() it returns a line number (3 for example) which is outside of the internal editWindow.Lines property within the control.

So line 3 may visually be the 3rd line of text. Yet internally all of the text only exists on line 1.

Is there any way to get the Lines property of the RTF to match the visual lines created via WordWrap???

Thanks!

There are 10 kinds of people in the world.

Those that read binary...

...and those who don't.

How to add a new user using DirectoryServices (User Logon Name)

markaelkins31-Mar-05 6:09

markaelkins

31-Mar-05 6:09

I am new to C# and looking for a little help. I need to programmatically
add users "User Logon Name" / "WinNT logon" to the windows 2000 Active Directory. I need to control/add other properties, but for now this is the main objective.

I have successfully added pre-Windows 2000 users with DirectoryEntry & NetUserAdd, but can't find the syntax to add a WinNT logon name.

I am using Visual Studio.Net 2003

Thank you,
markaelkins@gmail.com

Other properties that I need to control/add: (password, Full name, pre-Windows 2000 logon, User cannot change password, Password never expires, Description, Office)

Drawing a transparent labe over another control

RudyBone31-Mar-05 5:29

RudyBone

31-Mar-05 5:29

I have a progress bar. I would like to display a transparent label OVER the progress bar to show the % completed. It seems like all of the techniques related to creating a transparent label only make the label's background transparent relative to its parents background rather than relative to any sibling controls that might be draw UNDER it. Does anyone know of a way to draw a transparent label so that the text area of the label displays the content under the label rather then the background color of the parent container?

thanks.

Re: Drawing a transparent labe over another control

Heath Stewart31-Mar-05 6:34

Heath Stewart

31-Mar-05 6:34

A more appropriate way would be to extend the ProgressBar control and draw the label yourself. Putting a transparent control over it will require owner drawing anyway (to mask out everything but the text, which isn't easy if you want anti-aliased text) and will require more memory since another control is required (controls are windows and too many is very expensive).

So, extend the ProgressBar class and draw the text in the middle like so (just a basic example):

public class ProgressWithText : ProgressBar
{
  Brush textBrush;
  public ProgressWithText()
  {
    SetStyle(ControlStyles.UserPaint, true);
    textBrush = new SolidBrush(ForeColor);
  }
 
  protected override void OnPaint(PaintEventArgs e)
  {
    base.OnPaint(e);
 
    e.Graphics.DrawString(Value.ToString() + "%", Font, textBrush,
      (RectangleF)Bounds);
  }
  protected override void OnForeColorChanged(EventArgs e)
  {
    base.OnForeColorChanged(e);
    if (textBrush != null)
      textBrush.Dispose();
 
    textBrush = new SolidBrush(ForeColor);
  }
}

If you want to change the color of part of the text when the actual progress bar moves under the text, you should consider painting the whole thing (easier in the long run), which isn't too hard. Search for "progress bar" on this site for a number of good articles about owner-drawn progress bars.

This posting is provided "AS IS" with no warranties, and confers no rights.

Software Design Engineer
Developer Division Sustained Engineering
Microsoft

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Re: Drawing a transparent labe over another control

RudyBone31-Mar-05 6:51

RudyBone

31-Mar-05 6:51

Thanks, however when I go to compile this code, the compiler tells me that I can't inherit from ProgressBar because the class is sealed.

Re: Drawing a transparent labe over another control

Heath Stewart31-Mar-05 8:24

Heath Stewart

31-Mar-05 8:24

Hmm...so it is. I must apologize. I've never had a reason to extend it and other controls are sealed that I have extended. Progress bars are very easy to create. Please follow my suggestion to search this site for "progress bar" and you'll find lots of articles how, including progress bars with gradients, custom pictures, and more; some even provide sample code that shows how to draw the percentage text (similar to how I did it above).

This posting is provided "AS IS" with no warranties, and confers no rights.

Software Design Engineer
Developer Division Sustained Engineering
Microsoft

[My Articles] [My Blog]

image Resize

muslcesonvacation31-Mar-05 5:20

muslcesonvacation

31-Mar-05 5:20

Hi
I'm having an error "A generic error occurred in GDI+." with the following image resize code. can anybody help. PLZ

private void cmdStart_Click(object sender, System.EventArgs e)
{
if (( File1.PostedFile != null) && (File1.PostedFile.ContentLength > 0))
{
//determine file name
string szFileName = System.IO.Path.GetFileName(File1.PostedFile.FileName);
Size s = new Size(75,75);
ImageResize(File1.PostedFile.FileName,s);
}
}
void ImageResize(string str_file, Size new_size)
{
try
{
System.Drawing.Image src_image = System.Drawing.Image.FromFile(str_file);
Bitmap bitmap = new Bitmap(new_size.Width, new_size.Height,src_image.PixelFormat);
Graphics new_g = Graphics.FromImage(bitmap);
new_g.SmoothingMode =System.Drawing.Drawing2D.SmoothingMode.HighQuality;
new_g.InterpolationMode =System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
new_g.DrawImage(src_image, 0, 0, bitmap.Width, bitmap.Height);
src_image.Dispose();
bitmap.Save("C:\\Inetpub\\wwwroot\\ImageConverter\\bin\\resize.jpg", System.Drawing.Imaging.ImageFormat.Jpeg);
new_g.Dispose();
bitmap.Dispose();
}
catch(Exception e)
{
string a = e.Message;
}
}

Thanks
Gary

Re: image Resize

Heath Stewart31-Mar-05 5:27

Heath Stewart

31-Mar-05 5:27

I have a couple of questions.

On what line, exactly, does the exception get thrown? Please step through your code in the debugger. I'm assuming it's Graphics.DrawImage.
What is the pixel format of the image that you ran through the method?

This posting is provided "AS IS" with no warranties, and confers no rights.

Software Design Engineer
Developer Division Sustained Engineering
Microsoft

[My Articles] [My Blog]

Re: image Resize

muslcesonvacation31-Mar-05 5:31

muslcesonvacation

31-Mar-05 5:31

Hi,

The exception is being thrown on the bitmap.save method.

Thanks
Gary

Re: image Resize

Heath Stewart31-Mar-05 6:25

Heath Stewart

31-Mar-05 6:25

What as the pixel format of the original image you passed through the method?

This posting is provided "AS IS" with no warranties, and confers no rights.

Software Design Engineer
Developer Division Sustained Engineering
Microsoft

[My Articles] [My Blog]

Re: image Resize

Heath Stewart31-Mar-05 6:23

Heath Stewart

31-Mar-05 6:23

One other thing I noticed that, if "ImageConverter" is your ASP.NET project, you should not put files in the bin sub-directory. If ASP.NET is configured to handle the .jpg extension, then - by default - users will not be able to access bin\resize.jpg because access to files in the bin directory is disallowed by ASP.NET. You should consider saving the file to a directory users can access if you plan on passing it back as the src attribute of an IMG tag.

This posting is provided "AS IS" with no warranties, and confers no rights.

Software Design Engineer
Developer Division Sustained Engineering
Microsoft

[My Articles] [My Blog]

Dates

scotlandc31-Mar-05 5:11

scotlandc

31-Mar-05 5:11

Hi,

I am trying to set the value of a DateTimePicker to the first of next month in a UK date format.

ie every day this month (March) the DTP will read 01/04/2005 then next month it will read 01/05/2004.

Anyone know how it can be done? I've sorted the month part out with AddMonth(1) but have no idea how to set the date to 01 each time?

Please can someone help?

Thanks in advance

Scott

Re: Dates

techieboi31-Mar-05 5:57

techieboi

31-Mar-05 5:57

Alright mate, not sure I understand your problem but hopefully the code below will help.

DateTime startOfMonth = DateTime.Now.AddMonths(1);
startOfMonth = startOfMonth.AddDays(-startOfMonth.Day + 1);

The code add's one month to the current date and then defaults the date to the 1st of the month.

Re: Dates

Heath Stewart31-Mar-05 6:19

Heath Stewart

31-Mar-05 6:19

Do keep in mind that the DateTime type always uses the Gregorian calendar, so you should use the Calendar class to truly get the right date if not doing this strickly for the DateTimePicker. See http://blogs.msdn.com/michkap/archive/2005/03/28/402839.aspx[^] for more information.

This posting is provided "AS IS" with no warranties, and confers no rights.

Software Design Engineer
Developer Division Sustained Engineering
Microsoft

[My Articles] [My Blog]

Re: Dates

scotlandc4-Apr-05 0:52

scotlandc

4-Apr-05 0:52

Thanks for replying folks, much appreciated.

The code works perfectly, thank you.

I will bear that in mind about the Gregorian Calendar too, thanks for pointing it out.

Again, much appreciated.

Scott Wink | ;)

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