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Thanks Colin, That's great.
Makes sense and I'll give it a go.
Cheers
Steven
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I want read data from Serial Device COM1. Is there an example, how to do it?
Ariadne
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Hi ,
im trying to parse xhtml code in a xmldocument object.
the thing is that if i try to parse the code from eg www.xhtml.org it takes 15 seconds to parse the doc (using .LoadXML(xmlstring))
BUT
if i set the documents .XMLResolver = null
it works much much faster (maybe 1-2 seconds for the same doc)
however , if the document contains tokens like & the parsing fails and crashes if the xmlresolver is null.
what can i do about this?
could it be that the xmlresolver actually downloads the "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" that is specified in the xhtml code before it parses the code?
could i somehow make local copies of those files in that case and use those somethow?
//Roger
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You should read the documentation for the XmlResolver property and class, which would answer your questions. Yes, for fully-trusted code (by default, code executed on and from your machine) the XmlDocument.XmlResolver is an XmlUrlResolver and will resolve DTDs. So, either extend XmlResolver or XmlUrlResolver and override ResolveUri so that it doesn't fetch external resources. Do override (unless you extend XmlUrlResolver, which already does this) GetEntity so that entities are resolved. Instantiate your implementation and set that as the XmlDocument.XmlResolver.
Here's a problem, though - if that entity is defined in the DTD (since XHTML doesn't define entities like ) then you can't resolve it.
You could, however, attempt to resolve common entities (can be found on the W3C web site) as well as decimal and hexidecimal entities for character encoding, like &#XX; and &#xXX;. If the content author tries to include content using an entity, though, you'll have a problem (perhaps in this case you could fetch the DTD) before returning from your method - it may work).
Microsoft MVP, Visual C#
My Articles
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Thanks for the info.
i solved it by embedding the standard dtd/ent files into my lib and made my xmlresolver use the embedded resources if they exist otherwise it will use the external resources.
//Roger
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Good idea! I hadn't thought of doing that off the top of my head.
Microsoft MVP, Visual C#
My Articles
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How to write a application that the user can only use 3 times.
I'm waiting for you.
Thank you.
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Maybe you shoud make a config file and also store some counter values in registry. On load your program should increment value in registry and if it's > 3 then your application should delete your file.
xedom developers team
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Alex Getman (leTaon) wrote:
then your application should delete your file
Bad practice to delete from a user's PC without notification or prior notification that after # uses the app will delete itself.
Yes, I program in VB, but only to feed my addiction to a warm place to sleep and food to eat!
Visit my Code Project blog (Mobile Audio project)[^]
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Weak. Very weak. There is nothing to stop the user from unstalling the app, deleting the registry keys and files you leave behind and then starting all over again. Or even just put the older values back into the registry and files.
Copy protection like this is nortoriously difficult to write. Google for "time limited software protection" and you'll come up with a bunch of results on libraries and packages that can be used in your project.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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The only way of associating a file with a FileStream object is thru its constructor, It means if I want to change the file name associated with some FileStream, I should re-instantiate it, doesn't it? Do you know any better way to do that?
Regards
I lock my house, I lock my car and I pull that zipper on my pants up several times a day for the sake of security.
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A FileStream is tied to a native file handle, so yes, you must reinstantiate it. This is also why you should call Dispose on the FileStream when you're done. The file handle is a native type and unmanaged. Calling dispose closes that file handle. If you don't call Dispose, the file may remain locked until your application is closed.
Changing the file to which a FileStream object reference is not supported because of this fact. You can reassign the variable to a new FileStream, but that would reference a different object (and if you didn't call Dispose before changing the reference, you've just lost the ability to dispose it so that the native file handle is released).
Microsoft MVP, Visual C#
My Articles
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I define a class based on UserControl
UserControl has no Image property ,I add one like this
public class mycontrol : System.Windows.Forms.UserControl
...
private Image m_image;
...
public Image Image
{
get
{
return m_image;
}
set
{
m_image = value;
}
}
I putted it into visual studio toolbox,In design time ,I load a picture , but Can't unload it and set it back to none.
for example , a button has the image property , if I want get this image out , just set the property to "" in property grid,then the button's Image change to none,how does it works?
it's my image property define wrong ?
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Set the Image to null, that works for me (Try it with a button, asign an Image and add a click event that sets the Image property to null, the Image will disappear). If not, try calling the control's Invalidate() or Refresh() fucntions, since those will force the COntrol to repaint itself.
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The Image class itself is attributed with the ImageConverter, which takes care of this automatically for you. There's nothing you really need to do. You could attribute your property with [DefaultValue(null)], which will allow you to right-click and select "Reset".
Microsoft MVP, Visual C#
My Articles
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Thanks you, That's just what I want.
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hi
i want send mail from my program to next email ,for example Anzerato@hotmail.com ,but i can't,and error is :
System.web.HttpExeption:could not access 'CDO.Message'object.--->System.Reflection.TargetInvocationException:Exception has been thrown by the target of an invoction.--->System.Runtime.InteropServices.COMException(0x80040213):the transport failed to connect to server.
.
.
.
my program is :
MailMessage mail = new MailMessage();<br />
mail.From = "alichangizi@Hotmail.com";<br />
mail.To = "Anzerato@hotmail.com";<br />
mail.Subject = "Site Error";<br />
mail.Body = "OK";<br />
mail.BodyFormat = MailFormat.Html;<br />
MailMessage();<br />
try<br />
{<br />
SmtpMail.SmtpServer = "localhost";<br />
SmtpMail.Send(mail);<br />
}<br />
catch(System.Web.HttpException ehttp)<br />
{<br />
Console.WriteLine("{0}", ehttp.Message);<br />
Console.WriteLine("Here is the full error message output");<br />
Console.Write("{0}", ehttp.ToString());<br />
}<br />
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For one, you need to have the CDO component installed. The easiest way on Windows 2000, XP, and Windows Server 2003 is to install the SMTP services. Also, the SMTP server must relay for a particular domain. In your case, you must relay for hotmail.com.
Microsoft MVP, Visual C#
My Articles
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Hi,
I was wondering if you can set a hidden value (would this be called a SelectedValue?) to each row in ListView? I'm populating the ListView from a DataSet. I want to be able to click on a row and have a form come up and ask for edit/delete this row (which would really update the DataSet and then reload the ListView to show the changes). Of course in order to do this, I need to have a corresponding ID for each row in the ListView that's retrievable from the selected row.
Thanks,
Ron
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I faced with this problem not so long... Well, I created a hashtable and set keys from 0 to ListView.Count, and values were set just like in ListView, and on_klick I looked through hashtable and delete item that I need.
xedom developers team
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Hi Ron,
Each ListViewItem has a Tag property which can be used for storing anything you need. In your case you could associate an ID or a datarow object with it.
Regards,
Serge (Logic Software, Easy Projects .NET site)
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Thanks Serge!
Works great!
Ron
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I created two forms: MainForm has a textbox tbBox1. I clicked a button btnOpen to open the second form (named Form2). Now I want to get or set the value of tbBox1 from the second form by clicking a button btnAccess. How can I do it? The MainForm was opened by the standard "Application.Run(Form MainForm);" and the second form was opened by "Form2 a = new Form2(); a.Show();" in btnAccess's OnClick event. I have made tbBox1 public but I couldn't access the instance of MainForm. The MainForm class' instance (an object) has no name when opened from Application.Run. Please help.
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