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Your reply is very helpful.
Thank you 
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You're welcome. IBM's Big Blue was the 'research project' for the queue technology in MVS. You may find researching the chess algorithms for finding the next move. This is the similar approach for determine 'which is the next thread' when processing multi-thread environment.
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Hello,
I want to print directly to parallel port for fast writing (of-course when i use DMPs). I did following code but it generates an exception telling that it can't handle any device:
TextWriter sw = new StreamWriter("LPT1");<br />
sw.WriteLine("This is a test print!"); <br />
sw.Close();
Currently I have working version of it(VB6)
Open "LPT1" For Output As #1<br />
Print #1, "Bla,bla,bla...."<br />
Close #1
and C++
FILE *ptr = fopen("LPT1","w");<br />
fprintf(ptr,"Bla,bla,bla......");<br />
fclose(ptr);
How can I do that? Thanks in advance.
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I’ve finally understand the benefit with using events. I’ve made some my own but have a problem when not subscribing on an event.
public event EventHandler UpdateListCountChangedEvent;<br />
UpdateListCountChangedEvent(this, new EventArgs());
I got an exception (Object reference not set to an instance of an object) in those cases the function UpdateListCountChangedEvent(…) is called and I have no one that listen to it…
_____________________________
...and justice for all
APe
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You must first check if there are any subscribers to the event bvefore raising it...this is usually done with a particular pattern of event/protected method.
public class MyClassWithEvent
{
public event EventHandler MyEvent
protected virtual void OnMyEvent(EventArgs e)
{
if(MyEvent != null)
{
MyEvent(this,e);
}
}
}
The reason its done like this is 2-fold.
1) It enables methods in your class to easily raise the event without worrying if there are any subscribers... so you could have a method in there like:
public void DoSomethingAndRaiseMyEvent()
{
this.OnMyEvent(EventArgs.Empty);
}
2) It enables derived classes to change the behaviour slightly by overriding OnMyEvent.
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Perfect! Thanks!
_____________________________
...and justice for all
APe
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send me the code for creating dynamic checkboxes in html using _javascript
-- modified at 3:18 Tuesday 18th April, 2006
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<script language="JavaScript" type="text/javascript">
document.write("<input type=checkbox>");
</script>
Enjoy !
Best regards, Alexey.
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umaheshchandra wrote: send me the code
Try being polite and asking, rather than demanding.
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How could i add a custom icon to a windows form?
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look for icon property in your form's property window (generally located in right hand side pane of your IDE).
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I have used the icon property before.But the custom icon never appear.i dont know why?
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Hi ,
I have to fill a datatable with data from an ADODB recordset. I am using OleDBDataAdapter's fill method to do so.
The problem is as follows -
There is an adDateTime field in the recordset. Upon calling the fill method, it is converted to System.DateTime. But the 'time' part is lost and i get only date values for all the rows.
Could anybody please help ?
Thanks & Regards, Maau
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This is my code:
Excel.Range _Rng = (Excel.Range)_xlsSheet.get_Range("A1:H17", Missing.Value);
Where “C5:F11” is a merged cells in range “A1:H17”
It always report errors : Can't get object.
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hi, in dll project i create document,but if i add it to the other
project , i can not see my dll documents. why?
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You must provide access to your document.
What is the type of your document ?
Best regards, Alexey.
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hi guys!
need some help from u guys...
i hve just started working on c# from vb.net
and i m facing some problems..
in vb.net we can withevents keyword and call all the events of controls like for eg. for textbox textbox_textchanged(), textbox_keydown(),textbox_lostFocus(), etc .
but in c# i didnt found such keyword or related stuff..
coz of which i m not able to use such events properly can anyone let me know how to use these events..
thanks..
abhinav
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Nope. That's the ONLY cool thing about VB. In C#, you need to go to your load event ( or the events list in the properties, then it goes in initializeComponent automagically ) and set the event handlers.
Christian Graus - Microsoft MVP - C++
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In order to make use of those events,U need to use Javascript onkeydown,focus events
"Aim to go where U have never been B4 and Strive to achieve it"
http://groups.yahoo.com/subscribe/dotnetforfreshers
http://himabinduvejella.blogspot.com
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how can i import an excel worksheet data to load it to my sql server table?
rone_matias
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You can use the Odbc driver[^]. I do it often so:
1. Save your worksheet to csv file format but it must be looking like a table
field_name1 | field_name2 | field_name3
---------------------------------------
values | values | values
2. In your application you write
using Microsoft.Data.Odbc;
using System.Data;
....some code...
DataTable dt = new DataTable();
OdbcDataAdapter adapter;
OdbcConnection csvDB;
csvDB = new OdbcConnection("Driver={Microsoft Text Driver (*.txt; *.csv)}; Readonly=true;DBQ=[dir where is your file]");
adapter = new OdbcDataAdapter("SELECT * FROM [filename].csv", csvDB);
adapter.Fill(dt);
3.
foreach(DataRow dr in dt.Rows)
{
.....
with INSERT queries put it to your SQL DB.
}
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thank you very much. now what i need to learn is how to all the worksheet names of a particular workbook and put them all in a datatable. how would i do that? need help on this.
thank you in advance.
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U can use DTS Wizard
"Aim to go where U have never been B4 and Strive to achieve it"
http://groups.yahoo.com/subscribe/dotnetforfreshers
http://himabinduvejella.blogspot.com
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i have two dropdownlist containig dates
when i submit the dates
then c# page should enable a javascript function passing some arraylists as parameters andsome count values
then in java script function it should create a main checkbox for checking all checkboxes and
dechecking all checkboxes and some group of checkboxes
when i check only some checkboxes it should the list of checkboxes i have checked in a label box
and it also has to show the number of checkboxes checked .
all these checkboxes should be shown on webpage
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So, what's the question ?
Best regards, Alexey.
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