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Ok I have found that this is not possible but I wanted to know if anyone knew a way around this problem.
I have an abstract item class called AbstractMyItem, from this class I implement several items, one for example is MyBox. So the code for the box is:
public abstract class AbstractMyItem{}
public class MyBox: AbstractMyItem{}
For each item I want there to be a provider that performs some basic functionality for example:
public interface IMyItemProvider{
public AbstractMyItem [] LoadItems();
}
So for each I create a provider from the interface:
public class MyBoxProvider : IMyItemProvider {
public AbstractMyItem [] LoadItems();
}
However this creates a lot of casting as I have to cast the AbstractMyItem class to the MyBox class. It makes more sense to use generics like this:
public interface IMyItemProvider<T> where T : AbstractMyItem{
public T[] LoadItems();
}
public class MyBoxProvider : IMyItemProvider<MyBox>{
public MyBox[] LoadItems();
}
However as I said before I need to create a list of these providers. So in theory the obvious solution is:
List<IMyItemProvider<AbstractMyItem>> providers = new List<IMyItemProvider<AbstractMyItem>>();
providers.Add((IMyItemProvider<AbstractMyItem> ) MyBoxProvider);
However this will not work. You can't cast the concrete class to a the interfaced generic type. This does not work:
IMyItemProvider<AbstractMyItem> instance = (IMyItemProvider<AbstractMyItem> ) MyBoxProvider;
So the question. Anyone know of a good way to get around this problem? To be able to use generics with a list and assign my concrete classes to it?
It would be nice to say (I know this not real code).
List<IMyItemProvider<inherits AbstractMyItem>> providers = new List<IMyItemProvider<inherits AbstractMyItem>>();
providers.Add((IMyItemProvider<AbstractMyItem> ) MyBoxProvider);
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What you want to do is not possible as of C# 3. You may want to read Eric Lippert's series of articles on adding covariance and contravariance to a hypothetical version of C#[^].
In the meantime, here are some work arounds:
-Use a non-generic list.
-Make IMyItemProvider implement a non-generic interface, call it IProvidesItemsBase, then make your list be of type List<IProvidesItemsBase>. This will work, of course when you call LoadItems, you'd get back an array of AbstractMyItems.
Life, family, faith: Give me a visit.
From my latest post: "A lot of Christians struggle, perhaps at a subconscious level, about the phrase "God of Israel". After all, Israel's God is the God of Judaism, is He not? And the God of Christianity is not the God of Judaism, right?"
Judah Himango
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Using C#, I need to deserialize an xml stream in input on a socket. The problem is that I don't know class type on which the stream xml is based. More specifically I have more than one class on which the xml stream could be based. How can I know the class type that I should use among those that I have available?
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davegali wrote: The problem is that I don't know class type on which the stream xml is based.
Then you are screwed.
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is there any way to run the dropped file to explorer ?
TVMU^P[[IGIOQHG^JSH`A#@`RFJ\c^JPL>;"[,*/|+&WLEZGc`AFXc!L
%^]*IRXD#@GKCQ`R\^SF_WcHbORY87??6?N8?BcRAV\Z^&SU~%CSWQ@#2
W_AD`EPABIKRDFVS)EVLQK)JKSQXUFYK[M`UKs*$GwU#(QDXBER@CBN%
Rs0~53%eYrd8mt^7Z6]iTF+(EWfJ9zaK-i?TV.C\y<p?jxsg-b$f4ia>
--------------------------------------------------------
128 bit encrypted signature, crack if you can
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What dropped file? What explorer?! Oh my God where's my shoe!!
So, what are you trying to do?
My current favourite word is: I'm starting to run out of fav. words!
-SK Genius
Game Programming articles start - here[ ^]-
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oh are you newbie, you dont know what is drag drop ?  oh please, do not pretend like this, i just want to drag a file from my app and drop to somewhere else in explorer, now that drop file should run as it copied or moved, but how ??
Process.Start("????");
TVMU^P[[IGIOQHG^JSH`A#@`RFJ\c^JPL>;"[,*/|+&WLEZGc`AFXc!L
%^]*IRXD#@GKCQ`R\^SF_WcHbORY87??6?N8?BcRAV\Z^&SU~%CSWQ@#2
W_AD`EPABIKRDFVS)EVLQK)JKSQXUFYK[M`UKs*$GwU#(QDXBER@CBN%
Rs0~53%eYrd8mt^7Z6]iTF+(EWfJ9zaK-i?TV.C\y<p?jxsg-b$f4ia>
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I'm nor sure you can get windows explorer to run a file, if you do a FileDrop into windows explorer I'm pretty sure it will just move the file. If you want to execute the file afterwards you'd have to find out where you dropped it, unless by run you actually mean you just want explorer to copy/move the file.
Either way, you can do a FileDrop from your app to windows explorer like so:
void TreeView1ItemDrag(object sender, ItemDragEventArgs e)
{
string[] stuff = new string[1];
stuff[0] = 'path to file';
.
DataObject data = new DataObject(DataFormats.FileDrop, stuff);
.
this.treeView1.DoDragDrop(data, DragDropEffects.Copy);
}
Of course if your using a listView or something else your obviously gonna need to change that a little. Multiple files at the same time would just require you to add more paths to the string array.
My current favourite word is: I'm starting to run out of fav. words!
-SK Genius
Game Programming articles start - here[ ^]-
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yes yes i did that already, now i just want to run that dropped file, but dunno where to get its path
TVMU^P[[IGIOQHG^JSH`A#@`RFJ\c^JPL>;"[,*/|+&WLEZGc`AFXc!L
%^]*IRXD#@GKCQ`R\^SF_WcHbORY87??6?N8?BcRAV\Z^&SU~%CSWQ@#2
W_AD`EPABIKRDFVS)EVLQK)JKSQXUFYK[M`UKs*$GwU#(QDXBER@CBN%
Rs0~53%eYrd8mt^7Z6]iTF+(EWfJ9zaK-i?TV.C\y<p?jxsg-b$f4ia>
--------------------------------------------------------
128 bit encrypted signature, crack if you can
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I don't think you can, explorer handles the drop event and your application sees nothing more of it. You could get the handle to an open explorer window and perhaps find what folder is open, but you wouldn't know which window(if there was more than one) or if the user had to rename a file or cancel the move/copy.
My current favourite word is: I'm starting to run out of fav. words!
-SK Genius
Game Programming articles start - here[ ^]-
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yes, i'm trying to do this thing for around 2 days but nothing found that can help  , is there anyway to know what window we release the mouse ?
TVMU^P[[IGIOQHG^JSH`A#@`RFJ\c^JPL>;"[,*/|+&WLEZGc`AFXc!L
%^]*IRXD#@GKCQ`R\^SF_WcHbORY87??6?N8?BcRAV\Z^&SU~%CSWQ@#2
W_AD`EPABIKRDFVS)EVLQK)JKSQXUFYK[M`UKs*$GwU#(QDXBER@CBN%
Rs0~53%eYrd8mt^7Z6]iTF+(EWfJ9zaK-i?TV.C\y<p?jxsg-b$f4ia>
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128 bit encrypted signature, crack if you can
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are you asking about executing a program from Windows Explorer by dragging and dropping a target file onto it? If so then write your program to handle command line args. By default the paths of files dropped onto a program icon are passed to the Main function as parameters.
If that's not what you're asking about then you might want to clarify your question.
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no thats not what i want 
TVMU^P[[IGIOQHG^JSH`A#@`RFJ\c^JPL>;"[,*/|+&WLEZGc`AFXc!L
%^]*IRXD#@GKCQ`R\^SF_WcHbORY87??6?N8?BcRAV\Z^&SU~%CSWQ@#2
W_AD`EPABIKRDFVS)EVLQK)JKSQXUFYK[M`UKs*$GwU#(QDXBER@CBN%
Rs0~53%eYrd8mt^7Z6]iTF+(EWfJ9zaK-i?TV.C\y<p?jxsg-b$f4ia>
--------------------------------------------------------
128 bit encrypted signature, crack if you can
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When the file drag is completed - the foreground window is changed. You could use GetForegroundWindow from user32.dll to find which window is currently active at the end of the drag operation. I'm not sure how you'd get the path from it though. If the 'Display the full path in the title bar' option is enabled on the system, then you could use GetWindowText from user32.dll to get the path (if it's the desktop the text is 'Program Manager').
Once you get the path you can then use Process.Start
Dave
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thanks man for info, i will try it and reply soon
TVMU^P[[IGIOQHG^JSH`A#@`RFJ\c^JPL>;"[,*/|+&WLEZGc`AFXc!L
%^]*IRXD#@GKCQ`R\^SF_WcHbORY87??6?N8?BcRAV\Z^&SU~%CSWQ@#2
W_AD`EPABIKRDFVS)EVLQK)JKSQXUFYK[M`UKs*$GwU#(QDXBER@CBN%
Rs0~53%eYrd8mt^7Z6]iTF+(EWfJ9zaK-i?TV.C\y<p?jxsg-b$f4ia>
--------------------------------------------------------
128 bit encrypted signature, crack if you can
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Hi All,
Every time i try to execute a project i am coming up with the above error.
Can any one advice on the problem?
Thank you
regards
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Hi,
You may try the following options:
1) Verify that the file 'C:\WINNT\Microsoft.NET\Framework\v2.0.50727\WebDev.WebServer.exe' exists. Visiaul Studio installs the necessary file in the v2.0 framework folder by default. Removing the framework would screw up the local server option.
2) If you are running 64 bit machine then check out the following link:
http://support.microsoft.com/kb/920719
Hope this helps 
Regards,
John Adams
ComponentOne LLC
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hey guys
ive got two dataTables and two DataGrids on a form
The first datagrid's data is bound perfectly, now on a button click i need to add the selected row of the 1st DataGridView to the 2nd dataGridViews dataTable and remove it from the first
i tried this to remove the row...
private void button1_Click(object sender, EventArgs e)
{
foreach (DataGridViewRow row in dataGridView1.SelectedRows)
{
avalibalTimeCatRow = avalibalTimeCatTable.NewRow();
avalibalTimeCatRow[avalibalTimeCatIdColumn] = Int32.Parse(row.Cells[0].Value.ToString());
avalibalTimeCatRow[avalibalTimeCatNameColumn] = row.Cells[1].Value.ToString();
avalibalTimeCatTable.Rows.Remove(avalibalTimeCatRow);
}
}
the error is " The given DataRow is not in the current DataRowCollection."
any other ideas on how to remove the row?
thanx
Harvey Saayman - South Africa
Junior Developer
.Net, C#, SQL
you.suck = (you.passion != Programming)
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replace the error line with this
dataGridView1.Rows.Remove(row); , you were deleting a row that is not exist in that table thats what error is saying
TVMU^P[[IGIOQHG^JSH`A#@`RFJ\c^JPL>;"[,*/|+&WLEZGc`AFXc!L
%^]*IRXD#@GKCQ`R\^SF_WcHbORY87??6?N8?BcRAV\Z^&SU~%CSWQ@#2
W_AD`EPABIKRDFVS)EVLQK)JKSQXUFYK[M`UKs*$GwU#(QDXBER@CBN%
Rs0~53%eYrd8mt^7Z6]iTF+(EWfJ9zaK-i?TV.C\y<p?jxsg-b$f4ia>
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128 bit encrypted signature, crack if you can
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i tried that aswell before posting... the problem with that is the table.row is of type DataRow, which the remove method expects, and the dataGrids row is of type DataGridViewRow
Harvey Saayman - South Africa
Junior Developer
.Net, C#, SQL
you.suck = (you.passion != Programming)
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will you try again with that code line i gave you ? i'm sure it will work
TVMU^P[[IGIOQHG^JSH`A#@`RFJ\c^JPL>;"[,*/|+&WLEZGc`AFXc!L
%^]*IRXD#@GKCQ`R\^SF_WcHbORY87??6?N8?BcRAV\Z^&SU~%CSWQ@#2
W_AD`EPABIKRDFVS)EVLQK)JKSQXUFYK[M`UKs*$GwU#(QDXBER@CBN%
Rs0~53%eYrd8mt^7Z6]iTF+(EWfJ9zaK-i?TV.C\y<p?jxsg-b$f4ia>
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128 bit encrypted signature, crack if you can
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i did, the problem is the method expects a DataRow and im inserting a DataGridViewDataRow if i table.Rows.Remove(row);
Harvey Saayman - South Africa
Junior Developer
.Net, C#, SQL
you.suck = (you.passion != Programming)
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i said this :
dataGridView1.Rows.Remove(row);
Not this :
table.Rows.Remove(row);
TVMU^P[[IGIOQHG^JSH`A#@`RFJ\c^JPL>;"[,*/|+&WLEZGc`AFXc!L
%^]*IRXD#@GKCQ`R\^SF_WcHbORY87??6?N8?BcRAV\Z^&SU~%CSWQ@#2
W_AD`EPABIKRDFVS)EVLQK)JKSQXUFYK[M`UKs*$GwU#(QDXBER@CBN%
Rs0~53%eYrd8mt^7Z6]iTF+(EWfJ9zaK-i?TV.C\y<p?jxsg-b$f4ia>
--------------------------------------------------------
128 bit encrypted signature, crack if you can
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it works 
that doesnt make sense, does the dataGridView automatically change its dataSource if i change the data in the datagrid view?
thanx
Harvey Saayman - South Africa
Junior Developer
.Net, C#, SQL
you.suck = (you.passion != Programming)
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yes of course
TVMU^P[[IGIOQHG^JSH`A#@`RFJ\c^JPL>;"[,*/|+&WLEZGc`AFXc!L
%^]*IRXD#@GKCQ`R\^SF_WcHbORY87??6?N8?BcRAV\Z^&SU~%CSWQ@#2
W_AD`EPABIKRDFVS)EVLQK)JKSQXUFYK[M`UKs*$GwU#(QDXBER@CBN%
Rs0~53%eYrd8mt^7Z6]iTF+(EWfJ9zaK-i?TV.C\y<p?jxsg-b$f4ia>
--------------------------------------------------------
128 bit encrypted signature, crack if you can
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