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hello..
i need to save videos of all available extensions '.avi' '.wmv'... etc
i already have the videos in a folder is there a way to copy them .
thank you...
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You need to save them? Or copy existing files? You can copy files using System.IO.File class and the various static methods contained within it. For saving files, you have a number of options available to you (though nothing in the .NET framework class library). You could probably use the Window Media SDK or perhaps even the Managed DirectX dlls. Or, try the DirectShow managed wrapper available on CodeProject.
Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Bought a House!
Judah Himango
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Or just File.Copy() since he's not going to modify the files.
I'm not an expert yet, but I play one at work. Yeah and here too.
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Hello!
I working on a project to import c++ openCV into c#.
The problem is...this:
unsafe private static extern int function1(byte* bitmap, string haarclassifikator);
thats my call to an external dll file, the first parameter MUST be a pointer to a bitmap in memory.
unsafe<br />
{<br />
byte* bitmappointer = (byte*)Convert.ToByte(MyImage);<br />
function1(bitmappointer, classificator);<br />
}
doestn work.
my question: how can i convert from a bitmap object to a pointer? 
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Forgotten one thing:
the code compiles, but:
Unable to cast object of type 'System.Drawing.Bitmap' to type 'System.IConvertible'.
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Try the following code
public void CallExternalMethod(Bitmap map)<br />
{<br />
System.IO.MemoryStream stream = new System.IO.MemoryStream();<br />
map.Save(stream, System.Drawing.Imaging.ImageFormat.Bmp);<br />
byte[] rawBytes = stream.GetBuffer();<br />
<br />
unsafe <br />
{<br />
fixed (byte* rawPointer = rawBytes)<br />
{<br />
function1(rawPointer, classificator);<br />
}<br />
}<br />
}<br />
Jared Parsons
jaredp@beanseed.org
http://spaces.msn.com/members/jaredp/
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If you have a library use PInvoke and give the DLLImport attribute.
To get a pointer use IntPtr.
You might do that instead having to all the unsafe declarations
I'm not an expert yet, but I play one at work. Yeah and here too.
-- modified at 20:29 Sunday 11th December, 2005
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I typically prefer IntPtr's to unsafe code myself but the poster wanted a real *. For the curious though, here is the example with "safe" code.
<br />
[DllImport]<br />
public static extern bool function1<br />
[MarashalAs(UnmanagedType.LPArray)]byte[] data,<br />
int classificator);<br />
That's not 100% correct though because I don't know the return type and I'm not sure what type classificator is.
Note: By "safe" I mean the opposite of unsafe. I'm not implying this code is secure 
Jared Parsons
jaredp@beanseed.org
http://spaces.msn.com/members/jaredp/
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I was wondering if you can help me. I am trying to get a number pad to show up in a text box. EX. if you click on button 1 then the number 1 will show up in the text box. I have already created the form
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In the button event for each of the buttons set (or append) the relevant number to the Text property of the TextBox.
My: Blog | Photos
"Man who stand on hill with mouth open will wait long time for roast duck to drop in." -- Confucious
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private void Button1(object ....
myText.Text += "1";
I'm not an expert yet, but I play one at work. Yeah and here too.
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How could I design a class like TreeNode, I have tried but I am getting a Object Reference Exception
public class classA<br />
{<br />
public classA(){}<br />
public void INeed()<br />
{<br />
classB b = new classB();<br />
b.Add(string something);<br />
}<br />
}<br />
public class classB<br />
{<br />
private string att1;<br />
private int index ;<br />
private classB[] container;<br />
public classB()<br />
{<br />
container = new classB[100];index = 0 ;<br />
}<br />
public void Add(string addNew)<br />
{<br />
container[index].att1 = addNew;
index++;<br />
}<br />
}
If I do so , am getting a Object reference not set to an instance of an object error
in the line that I try to add something to the container.
Could you explain why ?
And how could I deal with the issue ?
-- modified at 15:24 Saturday 10th December, 2005
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Bahadir Cambel wrote: If I do so , am getting a Object reference not set to an instance of an object error
in the line that I try to add something to the container.
Could you explain why ?
Bahadir Cambel wrote:
container = new classB[100];</code></blockquote>
That <code>new</code> just allocates the space for the array elements. It doesn't instantiate the 100 objects; you have to do that yourself.
<pre>public void Add(string addNew) {
container[index] = new classB(); // my addition.
container[index].att1 = addNew;//causes error
index++;
}
If you don't actually want exactly 100 elements (did you just pick an arbitrarily large number...?) you should use a dynamically sized container, like an ArrayList, rather than an array. Just my 2 cents...
Share and enjoy.
Sean
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Yes it was a arbitrarily large number.
Thanks for you replay , it solved my problem.
Bado
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why not just use the add method to add your object.
Try extending the IList Interface. It will help you
class MyClass : IList
I'm not an expert yet, but I play one at work. Yeah and here too.
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I'm quiet new in c#, Now I'm try to develop a HR management program and this application need to have a report to show and print out to user, and there are more than one type of report that available for my user to choose, all the user have to do is just choose which report he/she like, So I want to know is there any easy tool to do a report? I try to use crystal report but I have to make a file name .rpt but in my case I need many report ,so do i have to make many .rpt file? or is there any other way to implement this? And can i use sql command with each report? if yes how? Please give me some suggestion . Thanks... I use VS.Net 2003 And SQL Server 2000 .
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do crystal reports or something.
You can use the printing namespace but would take forever
I'm not an expert yet, but I play one at work. Yeah and here too.
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I would like to know why we write this formula to change from color to Grayscale picture
The formula is p[0] = p[1] = p[2] = (byte)(.299 * red + .587 * green + .114 * blue);
thanks in advance
haitham
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The different colors have a different brightness, red and blue are perceived darker as darker colors. I assume it has to do with the fact that red and blue are on the ends of the visible spectrum while green is in the middle.
regards,
rob tillaart
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i know that this code convert the perceived bytes of the RGB to be within the domain 0-->255 and the rgb saved as 24byte per pixel i.e 3 * 8 bytes in other words red take byte blue takes byte etc so my question why we multiply the red color by the number (.299) specifically and of course the remaining numbers
thanks for ur attention.
haitham
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Converting a image to a grayscale has no standard. Mostly on the internet you will find this forumla givven by the NTSC standard
GS = 0.3*R + 0.59*G + 0.11*B
These scaling values (0.3, 0.59, 0.11) can variate. Their main purpose is to sum up to a property (luminance) of the givven color. The final color is from the grayscale because you set all the 3 bytes to the same value.
Try using other scaling values in your ConvertToGrayscale procedure and observe the diferrences.- of course that the standard values haven't been found through experimentation, a good image processing skil is required and if I m not mistaking phisics is needed too in order to get to a such result.
protected internal static readonly ... and I wish the list could continue ...
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You know they provide an imaging namespacing to do this math so as specifications change your code will not.
And the Color object can convert values for you
I'm not an expert yet, but I play one at work. Yeah and here too.
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DO u mean that the color object consists a method to convert the picture from color to grayscale or any specific format?
i didnt try it yet but i think that it will be slower than we handle this ourselves
thanks for ur help
haitham
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