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You have an even more fundamental question to answer before discussing the database and how to store your data. What is the client you are going to use, winforms/wpf or web/silverlight. This will be determined by your audience.
If your project is a personal one then winforms may be the best solution. With SQL server you have a number of choices of how you store your data, you may want to store the actual file in the database or filestore (SQL 2008) or you may want to leave the file in the file system and store it's location in the database.
If you are using the web this is critical as your database size will be DRAMATICALLY different and it will affect your hosting choices.
Never underestimate the power of human stupidity
RAH
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Personally, I prefer to store such files within the database.
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Hello every one
How I can set the Contextmenustrip for root and disable some items of Contextmenustrip for Children.
I fill tree with an Xml File.
if (treeView1.SelectedNode.Level == 0)
treeView1.SelectedNode.ContextMenuStrip = contextMenuStrip1;
if (treeView1.SelectedNode.Level == 1)
treeView1.SelectedNode.ContextMenuStrip = contextMenuStrip2;
modified on Sunday, January 10, 2010 1:34 AM
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I'm lookinmg for a simple C# program using the DDay.Ical library that adds Attendees both optional and required to a meeting request.
I've seen how to add the email for an attendee in addAttendee method. How do I make it required and optional?
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Hi everybody,
I have this abstract method:
public static T DecodeData<T>(byte[] data, string encRules)
But the type T must be defined during runtime. I mean... I have other method like:
GetDownloadType(id);
Depend on the id, I should pass one or another parameter to DecodeData. But I dont know how.
public static Type GetDownloadType (int id)
{
switch (id)
{
case DOWNDIRECT: return typeof(DownDirect);
case DOWNOTHER: return typeof(DownOther);
case DOWNHEHE: return typeof(DownHehe);
default: return null;
}
}
But when I try to use the Type result of this method to pass it to DecodeData... I cant. How should I do this?
Thanks in advanced
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T needs to be resolvable at compile time i.e before runtime when you have access to the type via typeof
Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Why are you using VB6? Do you hate yourself? (Christian Graus)
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The type things used in generics are not instances of Type
But of course you could put the calls to DecodeData in that switch (and some code that uses its result too, perhaps, otherwise you may get a similar problem with the result type)
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If you really need to invoke a generic method you could use something like this:
public static class Test
{
public static T GenericDecodeData<T>(byte[] data, string encRules)
{
return default(T);
}
public static Type GetDownloadType(int id)
{
switch (id)
{
case DOWNDIRECT: return typeof(DownDirect);
case DOWNOTHER: return typeof(DownOther);
case DOWNHEHE: return typeof(DownHehe);
default: return null;
}
}
public static object DecodeData(Type type, byte[] data, string encRules)
{
MethodInfo methodInfo = typeof(Test).GetMethod("GenericDecodeData").MakeGenericMethod(
new Type[] { type });
return methodInfo.Invoke(null, new object[] { data, encRules });
}
}
Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Why are you using VB6? Do you hate yourself? (Christian Graus)
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Thanks both.
I think that your solution, Dave, could do the trick!!! Thankssss!!
Kind regards
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Hi,
How can I get the number 123456789012
displayed as: 1234-5678-9012
I tried the following but it didn't work..
String.Format("{0:000-000-000-000}",123456789012);
Thank you.
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Try this:
string.Format("{0:0000-0000-0000}", 123456789012);
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I code in C++ so I'll leave it to you to work out the C# code.
Why not break it into 3 integers for example 1234, 5678 & 9012 & then use String.Format with the 3 numbers.
You get 1234 (the first integer) by taking the integer part of dividing by 100000000 that is int(123456789012/100000000)
You get 5678 (the second integer) by taking the modulus (remainder) on dividing by 10000 that is
mod(int(123456789012/10000), 1000)
You get 9012 (the third integer) by taking the modulus relative to 10000 that is mod(123456789012, 10000)
Hope this helps 
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Thanks mate, I just remembered that a masked textbox control is all I need
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System.Console.WriteLine ( System.String.Format("{0:0000-0000-0000}",123456789012) ) ;
System.Console.WriteLine ( 123456789012.ToString("0000-0000-0000") ) ;
Both seem to work to me. What problem does it give?
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Funny, none of them work with me but it doesn't matter as I'm using the masked textbox now.. I'll have to find out later when I have the time.. Thank you guys!
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Hi.
First of all, I have done a few C# applications, but are quite new to C# asp.net web applications.
What I am trying to receive is a simple Media player control on an aspx page. And furthermore a button, that starts the media player with a videostream url. Thats all!
I can easily achieve this in an ordinary c# form, by importing:
AxInterop.WMPLib.dll, Interop.WMPLib.dll and wmp.dll
references in the project. Now i am able to choose a "Windows media player" control in the toolbox, which i can drag into my form. Nice and easy.
But when i import these dll´s in my ASP.NET Web application, I cannot see the media player control in the toolbox. Ive tried to right-click the toolbox, and click "Choose items", and see that 'Windows media player' is checked under the COM components tab. But i still cannot see the control in the toolbox. Only in an ordinary c# application form.
This is driving me nuts. Ive tried googling for hours, but cant find the answer.
So if any kind sould could pinpoint me in the right direction, or make a quick solution file that holds this simple control on an aspx page, i would be very glad!
Thanks alot for your time.
Kind regards,
Lars
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How Change the size in dataGridView for specific cells ?
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Hi,
AFAIK you can't change the size of a single cell, however you can set properties for an entire column; example:
dgv.Columns[1].Width = 100;
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i need to override the base CheckedListBox behaviour.
it is possible to check and uncheck a CheckedListBox without any code attached to it.
i need to disable this behaviour so that i can implement custom code.
any ideas?
for example:
if (ListenCheckedListBox.GetItemChecked(0)) { ListenCheckedListBox.SetItemChecked(0, false); }
if (!ListenCheckedListBox.GetItemChecked(0)) { ListenCheckedListBox.SetItemChecked(0, true); }
does not work because the controls default behaviour already does this anyway.
hopefully you can understand my issue.
thanks.
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Have you looked at the CheckedListBox.CheckOnClick property?
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yes i have. but default behaviour is toggle between states. what i dont want.
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How can I break recursive function;
For example;
private string MyFunction(string val)
{
//ToDo Calculate xyz
if(xyz != "test") //<----This condition three times true.
{
val = MyFunction(xyz);
}
return val;
}
How can I return "val" when (xyz == "test")
I don't want to call back MyFunction when if condition is true.
Thanks...
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Hi,
the normal way to use recursive functions is by providing parameters that have different values each time; the typical example is the factorial function:
public int Factorial(int n) {
if (n<=1) return 1;
return n*Factorial(n-1);
}
Did you notice:
1. I used PRE tags to show code, so it is formatted and rendered in a non-proportional font for optimal readability.
2. the Factorial function, taking n as a parameter, calls itself not with n but with n-1.
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Most recursive methods have two parts: one that handles the deepest recursion and the normal path that recurses. You've done this in your example, but I would write:
string MyFunction( string val )
{
if ( val == "test" ) return val;
string xyz = ...
return MyFunction( xyz );
}
Nick
----------------------------------
Be excellent to each other 
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