|
oops sorry for posting vb question in a C# region. Thanks I appreciate it!
|
|
|
|
|
How can I recognize the characters in a bitmap using c#?
(Im doning OCR prgram)
|
|
|
|
|
You could Google for 'OCR' algorithms. There is one here[^] on CodeProject.
RageInTheMachine9532
"...a pungent, gastly, stinky piece of cheese!" -- The Roaming Nome
|
|
|
|
|
XmlTextReader reader = new XmlTextReader ("faq.xml");
Why is the default directory for this code = c:\winnt\system32? Maybe I'm missing something, but since this code is located inside of a ASP.Net Default.aspx file... shouldn't it default to the web root?
|
|
|
|
|
No it shouldn't. It has to do with the executable path or the current working directory set by the executable.
To open a file in a virtual directory, you should use the MapPath method, which is available both on the intrinsic Server property of several objects (an instance of HttpServerUtility) or on the Page class itself:
string path = MapPath("faq.xml");
XmlTextReader reader = null;
try
{
reader = new XmlTextReader(path);
}
finally
{
if (reader != null) reader.Close();
}
Microsoft MVP, Visual C#
My Articles
|
|
|
|
|
Thanks for the tip. Do you have any suggetions (websites) for a beginners guide to updating XML files in C#?
|
|
|
|
|
|
I'm trying to find the top of a cell in excel.
i tried this code in vba:
something = OutputWorksheet.Range("A1","A1").Top
this works fine
the only way i've found of getting c# to do the same is:
float something = (float)Convert.ToDouble( OutputWorksheet.get_Range("A1","A1").Top.ToString())
is this really the way i have to do this cast?
Thanks
Russell
|
|
|
|
|
Um, why convert to a Double and then cast to a Single (float)? Also, get_Range returns a Range object, from which you can get the Top and just cast that to a float like so:
Range rng = OutputWorksheet.get_Range("A1", "A1");
float top = (foat)rng.Top;
Microsoft MVP, Visual C#
My Articles
|
|
|
|
|
Hi everyone,
I have an application that should support two types of databases (SQL Server and Oracle). What I want to do is create a datalayer that will use SqlConnection or OracleConnection object depending on the database.
In C++ I would have done the following:
template<class ConnectionType>
class DataLayer
{
...
...
ConnectionType * type
}
DataLayer<SqlConnection> m_layer; // for example
How can I achieve the same result in C#?
Thanks,
Sincerely,
Pankaj
Without struggle, there is no progress
|
|
|
|
|
You would use the provider pattern, an abstract class or interface that contains the methods you would invoke. You then use the appropriate implementation (SQL, Oracle, whatever) that you could configure in the application's .config file. We've been using this since .NET 1.0 for our smart client application.
.NET 2.0 will use the provider pattern heavily: for database access, authentication, personalization, and much, much more.
For more information, you should read a couple of recent MSDN articles:
Microsoft MVP, Visual C#
My Articles
|
|
|
|
|
Thanks Heath!
Pankaj
Without struggle, there is no progress
|
|
|
|
|
Hi. I need 3 applications working at the same time. The first one is a
Pocket PC application, the second is a web service and the third one isn't
done yet. This third app is only to receive messages (maybe a Windows Forms
application or even an ASP.NET one...)
The question is how to send messages to the third application. It should be
the web service when the Pocket PC calls a web method. How could I do that?
Remoting? I only need to send a string, so the easier method 
Regards,
Diego F.
|
|
|
|
|
.NET Remoting is probably the easiest way. The PPC (presumably a .NET CF application) would call the web service method, which calls a remoting method on the third application. It should be tollerant that the third application might not be running, especially if this is an application that must be started by the user (like a desktop application monitor or something).
Microsoft MVP, Visual C#
My Articles
|
|
|
|
|
OK, then I'll try with Remoting. Is there any consideration I should know using Remoting with web services or is just the same way as using Remoting between two console applications?
Regards,
Diego F.
|
|
|
|
|
You should be mindful of the service registration type. If you use a singleton - depending how the remoting object is hosted, yours calls may be synchronous while web service methods are not. This will result in synchronous-like method calls to your web service. The lifetime of the remoting object is also a factor. Basically, there's a lot of factors that go into this. If you're not familiar with .NET Remoting, I suggestion a couple of books. I just posted these earlier today, so I'll just refer you to that post[^].
Microsoft MVP, Visual C#
My Articles
|
|
|
|
|
Hi,
I have a combobox and now i want that you can see the first item when it's filled. Now it's empty and you can type in the combobox.
Thx!
|
|
|
|
|
You should change the DropDownStyle property to ComboBoxStyle.DropDownList. The default is DropDown and allows you type, where DropDownList doesn't. If you want the user to be able to type in new items, then you should set the SelectedIndex to 0.
Microsoft MVP, Visual C#
My Articles
|
|
|
|
|
Hello,
I have a xml-file where some words are in uppercase. Is it possible to edit the entire file. So everything in the file is in lowercase?
thx in advance
|
|
|
|
|
Read the entire file into a String, just like any text file, then call the .ToLower method on the String, then write the new file out to a DIFFERENT file. Write it out a different file just to make sure nothing went wrong and you still have the original file to work from.
RageInTheMachine9532
|
|
|
|
|
While the two previous answers tell you how, I want to stress the "why and why not". If the XML elements and attributes are supposed to be a certain case, you should leave them. XML elements and attributes are case-sensitive. Changing them would cause any processors specific to that schema (like an XSLT or DOM parser) to fail (at least, identifying it as the appropriate doc type).
If this is a file you have created, then you must make sure that any processing is changed to use the lower-case elements and attributes.
Microsoft MVP, Visual C#
My Articles
|
|
|
|
|
hi
why output of this code isn't Transparent.
Bitmap b = new Bitmap(100,20);<br />
Graphics g = Graphics.FromImage(b);<br />
g.Clear(Color.Transparent);<br />
g.DrawString("Test",new Font("Tahoma",8),new SolidBrush(Color.Green),0,0);<br />
b.Save("test.gif",System.Drawing.Imaging.ImageFormat.Gif);<br />
Close();<br />
thanks.
|
|
|
|
|
A GIF is an index image, so there is no transparent color. There is, however, a color that is masked so that the GIF appears transparent. See the Bitmap.MakeTransparent method. You provide it a color and that image is saved with that color's index marked as the transparent color so it appears transparent when displayed.
Microsoft MVP, Visual C#
My Articles
|
|
|
|
|
Hi i am trying to get the value of an attribute displayed, but i can't seem to find the best way to get to it. If the element contains no attributes it returns -1?
XmlDocument document = new XmlDocument();<br />
document.Load("..\\..\\commands.xml");<br />
<br />
XmlNodeReader reader = new XmlNodeReader(document);<br />
<br />
this.Show();<br />
<br />
while (reader.Read())<br />
{<br />
switch (reader.NodeType)<br />
{<br />
case XmlNodeType.Element:<br />
int attributes = reader.AttributeCount;<br />
cmdOutput.Text += "<" + reader.Name + reader.GetAttribute(attributes) + ">";<br />
break;<br />
case XmlNodeType.Text:<br />
cmdOutput.Text += "\t" + reader.Value + "\r\n";<br />
break;<br />
case XmlNodeType.EndElement:<br />
cmdOutput.Text += "</" + reader.Name + ">\r\n";<br />
break;<br />
}<br />
}
|
|
|
|
|
Why not just have a case for the XmlNodeType.Attribute? Your switch cases will be called appropriately so even if you were to just write-out the attribute, it will happen in between XmlNodeType.Element and XmlNodeType.Text or XmlNodeType.EndElement, if there are any attributes. What you have anyway will not work anyway. AttributeCount - 1 would be the index of the last attribute. Remember that indexes in the .NET FCL are 0-based.
Microsoft MVP, Visual C#
My Articles
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
