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Hi,
if i have this code:
interface AInterface
{
double GetNum{ get;}
}
public class A:AInterface
{
int x;
virtual public double GetNum{
get
{
return x*10;
}
}
}
public class B:A ,AInterface
{
int y;
override public double GetNum{
get
{
return y*base.GetNum;
}
}
The problem is that if i will write this code:
B b = new B();
b.x =2;
b.y=5;
print ( B.GetNum.ToString);
I Have a problem when B call base.GetNum because it calling to him self.
What can i do to solve this problem?
Thanks for all of your help.
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Remove AInterface from class B? It already inherits AInterface anyway
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If you were to fix a dozen or so syntax errors and to run the code, you would get 100, as it should be.
The type of b is B, and the base of B is A.
BTW: don't use verbs in property names, they don't belong; they do in method names, not in property names.
Luc Pattyn [Forum Guidelines] [My Articles]
The quality and detail of your question reflects on the effectiveness of the help you are likely to get.
Show formatted code inside PRE tags, and give clear symptoms when describing a problem.
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Hello All ,
i have doubt new operator will create an object on heap .
So when i declare int as int x = new int();
will these be stored in Heap or stack ? Since value type are stored on stack but at same time new wil store it on heap ?
So got confused . Please do clarify it.
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Hi,
MSDN says "The new operator is also used to invoke the default constructor for value types."
Inside a method:
int x; allocates an int on stack and does not initialize it.
int x=5; allocates an int on stack and sets it to 5;
int x=new int(); allocates an int on stack and sets it to 0;
and int x=new int(5); does not compile.
new allocates on a heap for reference types only.
It suffices to read a book, to read MSDN, or to search (google) for such information.
Luc Pattyn [Forum Guidelines] [My Articles]
The quality and detail of your question reflects on the effectiveness of the help you are likely to get.
Show formatted code inside PRE tags, and give clear symptoms when describing a problem.
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In reality it does not matter. The beauty of C# is that the compiler/CLR does so much of the work for you that you need not generally be concerned where the actual objects are stored.
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Items on the stack vanish when the method exits, at no cost. Objects on a heap need time and cycles to get collected, so it may be relevant.
Luc Pattyn [Forum Guidelines] [My Articles]
The quality and detail of your question reflects on the effectiveness of the help you are likely to get.
Show formatted code inside PRE tags, and give clear symptoms when describing a problem.
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Thanks I had not considered the finer implications of the question.
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Hi dear friends,
from last few days i am digging my head like anything for loading rss feed(its nothing but a xml file) in to mozilla browser.
i am succesfully load that and displayed in IE but unable to load it in mozzlia.here the link for rss feed is-"
http://www.ed.gov/rss/edgov.xml[^]
plz help me out.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><br />
<html xmlns="http://www.w3.org/1999/xhtml" ><br />
<head><br />
<title>Untitled Page</title><br />
<script type="text/javascript"><br />
if(navigator.appName == "Netscape")<br />
{<br />
alert("You're using a Netscape browser.")<br />
function loadXML()<br />
{<br />
<br />
var xmlDoc = document.implementation.createDocument("", "", null) <br />
xmlDoc.load("http://www.ed.gov/rss/edgov.xml");<br />
xmlDoc.onload = readXML;<br />
<br />
alert("hi")<br />
document.getElementById("title").innerHTML= xmlDoc.getElementsByTagName("title")[2].firstChild.nodeValue<br />
document.getElementById("description").innerHTML= xmlDoc.getElementsByTagName("description")[2].firstChild.nodeValue<br />
<br />
document.getElementById("title1").innerHTML= xmlDoc.getElementsByTagName("title")[3].firstChild.nodeValue<br />
document.getElementById("description1").innerHTML= xmlDoc.getElementsByTagName("description")[3].firstChild.nodeValue<br />
<br />
document.getElementById("title2").innerHTML= xmlDoc.getElementsByTagName("title")[4].firstChild.nodeValue<br />
document.getElementById("description2").innerHTML= xmlDoc.getElementsByTagName("description")[4].firstChild.nodeValue<br />
<br />
document.getElementById("title3").innerHTML= xmlDoc.getElementsByTagName("title")[4].firstChild.nodeValue<br />
document.getElementById("description3").innerHTML= xmlDoc.getElementsByTagName("description")[4].firstChild.nodeValue<br />
<br />
document.getElementById("title4").innerHTML= xmlDoc.getElementsByTagName("title")[5].firstChild.nodeValue<br />
document.getElementById("description4").innerHTML= xmlDoc.getElementsByTagName("description")[5].firstChild.nodeValue<br />
<br />
document.getElementById("title5").innerHTML= xmlDoc.getElementsByTagName("title")[6].firstChild.nodeValue<br />
document.getElementById("description5").innerHTML= xmlDoc.getElementsByTagName("description")[6].firstChild.nodeValue<br />
<br />
<br />
}<br />
<br />
<br />
<br />
<br />
}<br />
if(navigator.appName == "Microsoft Internet Explorer")<br />
{<br />
var xmlDoc<br />
function loadXML()<br />
{<br />
if (window.ActiveXObject)<br />
{<br />
xmlDoc = new ActiveXObject("Microsoft.XMLDOM");<br />
xmlDoc.async=false;<br />
xmlDoc.load("http://www.ed.gov/rss/edgov.xml");<br />
xmlObj=xmlDoc.documentElement; <br />
<br />
if (xmlDoc.readyState != 4) <br />
{ <br />
return false; <br />
} <br />
<br />
document.getElementById("title").innerHTML= xmlDoc.getElementsByTagName("title")[2].firstChild.nodeValue<br />
document.getElementById("description").innerHTML= xmlDoc.getElementsByTagName("description")[2].firstChild.nodeValue<br />
<br />
document.getElementById("title1").innerHTML= xmlDoc.getElementsByTagName("title")[3].firstChild.nodeValue<br />
document.getElementById("description1").innerHTML= xmlDoc.getElementsByTagName("description")[3].firstChild.nodeValue<br />
<br />
document.getElementById("title2").innerHTML= xmlDoc.getElementsByTagName("title")[4].firstChild.nodeValue<br />
document.getElementById("description2").innerHTML= xmlDoc.getElementsByTagName("description")[4].firstChild.nodeValue<br />
<br />
document.getElementById("title3").innerHTML= xmlDoc.getElementsByTagName("title")[4].firstChild.nodeValue<br />
document.getElementById("description3").innerHTML= xmlDoc.getElementsByTagName("description")[4].firstChild.nodeValue<br />
<br />
document.getElementById("title4").innerHTML= xmlDoc.getElementsByTagName("title")[5].firstChild.nodeValue<br />
document.getElementById("description4").innerHTML= xmlDoc.getElementsByTagName("description")[5].firstChild.nodeValue<br />
<br />
document.getElementById("title5").innerHTML= xmlDoc.getElementsByTagName("title")[6].firstChild.nodeValue<br />
document.getElementById("description5").innerHTML= xmlDoc.getElementsByTagName("description")[6].firstChild.nodeValue<br />
<br />
}<br />
}<br />
<br />
<br />
}<br />
</script><br />
</head><br />
<body onload="loadXML()"><br />
<table width="100%" ><br />
<tr><br />
<td ><br />
<marquee onmouseover="if(this.stop)this.stop()" onmouseout="if(this.start)this.start()"><br />
<label id="title"> </label> - <label id="description"></label>;<br />
<label id="title1"></label> - <label id="description1"></label>; <br />
<label id="title2"></label> - <label id="description2"></label>; <br />
<label id="title3"></label> - <label id="description3"></label>;<br />
<label id="title4"></label> - <label id="description4"></label>;<br />
<label id="title5"></label> - <label id="description5"></label>;<br />
</marquee><br />
</td><br />
</tr><br />
</table><br />
</body><br />
</html><br />
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Try a web forum - clickity[^] - if you want a reply.
Panic, Chaos, Destruction.
My work here is done.
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I have used emgu cv to create a face detection program and i followed the code according to this website
http://friism.com/webcam-face-detection-in-c-using-emgu-cv
what i would like to know is there any codes that can count the number of faces in the picture or the number of rectangles that appear during face detection so that i will be able to know the number of people present in the picture
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You stand a better chance of a valid reply on the emgu cv site here[^].
Henry Minute
Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”
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Hi All,
I have table, named tblTasks, with columns Id, Name, StartDate, EndDate etc. I want to convert this table in to xml fromat via nHibernate.
<Task>
<Id> </Id>
<Name> </Name>
<StartDate> </StartDate>
<EndDate> </EndDate>
</Task>
I am using NHibernate dll version 2.1.0.
Pls help me.
Thanks in advance
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NHibernate has its own forums, you could try asking here[^].
Henry Minute
Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”
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Hi all,
I've been given source code for a program that created a form post from values within an excel document, however I keep getting the following errors:
Property, indexer, or event 'Value' is not supported by the language; try directly calling accessor methods 'Microsoft.Office.Interop.Excel.Range.get_Value(object)' or 'Microsoft.Office.Interop.Excel.Range.set_Value(object, object)'
I've had a root through the MSDN site, and cant seem to work out whats wrong:
private void btnBatchExecute_Click(object sender, System.EventArgs e)
{
Excel.Application xlApp;
Excel.Workbook xlWorkbook;
Excel.Worksheet xlWorkSheet;
Excel.Range xlRange;
string method;
string postString;
string[] values;
string returnString;
XmlDocument xDoc = new XmlDocument();
try
{
xlApp = new Excel.ApplicationClass();
xlApp.Visible = true;
string thisFileName = txtFileName.Text;
xlWorkbook = xlApp.Workbooks.Open(thisFileName,
Type.Missing, Type.Missing, Type.Missing, Type.Missing,
Type.Missing, Type.Missing, Type.Missing, Type.Missing,
Type.Missing, Type.Missing, Type.Missing, Type.Missing,
Type.Missing, Type.Missing);
xlWorkSheet = (Excel.Worksheet)xlWorkbook.ActiveSheet;
for(int i = 5;;i++)
{
xlRange = xlWorkSheet.get_Range(xlWorkSheet.Cells[i,2],xlWorkSheet.Cells[i,52]);
values = ConvertToStringArray((System.Array)xlRange.Cells.Value);
if(values[0]=="") break;
postString = "ESERIES_FORM_ID=AUTHENTICATE_3&CTRL_TYPEINDICATOR=C&CTRL_SEARCHCONSENT=Y&CTRL_CHANNEL=I&CTRL_CALLTYPE=I";
postString+="&NAME_TITLE="+values[0];
postString+="&NAME_FORENAME="+values[1];
postString+="&NAME_INITIALS="+values[2];
postString+="&NAME_SURNAME="+values[3];
postString+="&NAME_SUFFIX="+values[4];
postString+="&NAME_DATEOFBIRTH_DD="+("0"+values[5]).Substring(("0"+values[5]).Length-2);
postString+="&NAME_DATEOFBIRTH_MM="+("0"+values[6]).Substring(("0"+values[6]).Length-2);
postString+="&NAME_DATEOFBIRTH_CCYY="+values[7];
if(values[8]!="")
{
postString+="&NAME_TITLE="+values[8];
postString+="&NAME_FORENAME="+values[9];
postString+="&NAME_INITIALS="+values[10];
postString+="&NAME_SURNAME="+values[11];
postString+="&NAME_SUFFIX="+values[12];
postString+="&NAME_DATEOFBIRTH_DD="+("0"+values[5]).Substring(("0"+values[5]).Length-2);
postString+="&NAME_DATEOFBIRTH_MM="+("0"+values[6]).Substring(("0"+values[6]).Length-2);
postString+="&NAME_DATEOFBIRTH_CCYY="+values[7];
}
postString+="&ADDR_FLAT="+values[15];
postString+="&ADDR_HOUSENAME="+values[14];
postString+="&ADDR_HOUSENUMBER="+values[13];
postString+="&ADDR_STREET="+values[16];
postString+="&ADDR_DISTRICT="+values[17];
postString+="&ADDR_TOWN="+values[18];
postString+="&ADDR_COUNTY="+values[19];
postString+="&ADDR_POSTCODE="+values[20];
postString+="&RESY_DATEFROM_CCYY="+values[28];
postString+="&RESY_DATEFROM_MM="+("0"+values[27]).Substring(("0"+values[27]).Length-2);
postString+="&RESY_DATEFROM_DD="+("0"+values[26]).Substring(("0"+values[26]).Length-2);
postString+="&RESY_DATETO_CCYY="+values[31];
postString+="&RESY_DATETO_MM="+("0"+values[30]).Substring(("0"+values[30]).Length-2);
postString+="&RESY_DATETO_DD="+("0"+values[29]).Substring(("0"+values[29]).Length-2);
postString+="&RESY_DATEFROM_CCYY="+values[28];
postString+="&RESY_DATEFROM_MM="+("0"+values[27]).Substring(("0"+values[27]).Length-2);
postString+="&RESY_DATEFROM_DD="+("0"+values[26]).Substring(("0"+values[26]).Length-2);
postString+="&RESY_DATETO_CCYY="+values[31];
postString+="&RESY_DATETO_MM="+("0"+values[30]).Substring(("0"+values[30]).Length-2);
postString+="&RESY_DATETO_DD="+("0"+values[29]).Substring(("0"+values[29]).Length-2);
if(values[39]!="")
{
postString+="&ADDR_FLAT="+values[34];
postString+="&ADDR_HOUSENAME="+values[33];
postString+="&ADDR_HOUSENUMBER="+values[32];
postString+="&ADDR_STREET="+values[35];
postString+="&ADDR_DISTRICT="+values[36];
postString+="&ADDR_TOWN="+values[37];
postString+="&ADDR_COUNTY="+values[38];
postString+="&ADDR_POSTCODE="+values[39];
postString+="&RESY_DATEFROM_CCYY="+values[47];
postString+="&RESY_DATEFROM_MM="+("0"+values[46]).Substring(("0"+values[46]).Length-2);
postString+="&RESY_DATEFROM_DD="+("0"+values[45]).Substring(("0"+values[45]).Length-2);
postString+="&RESY_DATETO_CCYY="+values[50];
postString+="&RESY_DATETO_MM="+("0"+values[49]).Substring(("0"+values[49]).Length-2);
postString+="&RESY_DATETO_DD="+("0"+values[48]).Substring(("0"+values[48]).Length-2);
postString+="&RESY_DATEFROM_CCYY="+values[47];
postString+="&RESY_DATEFROM_MM="+("0"+values[46]).Substring(("0"+values[46]).Length-2);
postString+="&RESY_DATEFROM_DD="+("0"+values[45]).Substring(("0"+values[45]).Length-2);
postString+="&RESY_DATETO_CCYY="+values[50];
postString+="&RESY_DATETO_MM="+("0"+values[49]).Substring(("0"+values[49]).Length-2);
postString+="&RESY_DATETO_DD="+("0"+values[48]).Substring(("0"+values[48]).Length-2);
}
txtReturn.Lines = values;
if (rdoPost.Checked == true)
method = "POST";
else
method = "GET";
returnString = webRequest(txtAddress.Text, method, "HTML", postString);
txtReturn.Text = returnString;
txtReturn.Refresh();
returnString = Regex.Replace(returnString,@"&[^(amp;)]","&");
xDoc.LoadXml(returnString);
if(xDoc.SelectNodes("//ERR1").Count>0)
{
xlRange = xlWorkSheet.get_Range(xlWorkSheet.Cells[i,68],xlWorkSheet.Cells[i,68]);
xlRange.Value="Error! - " + xDoc.SelectSingleNode("//ERR1").InnerText;
}
else
{
int cellPos;
if("CHAM"==xDoc.SelectSingleNode("//AU3E/TEST_GROUP").InnerText)
{
cellPos=54;
}
else
{
cellPos=61;
}
xlRange = xlWorkSheet.get_Range(xlWorkSheet.Cells[i,cellPos],xlWorkSheet.Cells[i,cellPos++]);
xlRange.Value=xDoc.SelectSingleNode("//AU3E/AUTH_INDEX").InnerText;
xlRange = xlWorkSheet.get_Range(xlWorkSheet.Cells[i,cellPos],xlWorkSheet.Cells[i,cellPos++]);
xlRange.Value=xDoc.SelectSingleNode("//AU3E/PST_OUTCOME").InnerText;
if("0"==xDoc.SelectSingleNode("//AU3E/POLICY_RULE_COUNT").InnerText)
{
xlRange = xlWorkSheet.get_Range(xlWorkSheet.Cells[i,cellPos],xlWorkSheet.Cells[i,cellPos++]);
xlRange.Value="No Rules Hit!";
}
else
{
int counter=1;
foreach(XmlNode node in xDoc.SelectNodes("//AU3E/POLICYRULES/POLICY_RULE"))
{
xlRange = xlWorkSheet.get_Range(xlWorkSheet.Cells[i,cellPos],xlWorkSheet.Cells[i,cellPos++]);
xlRange.Value=node.InnerText;
if(counter++>5)break;
}
}
}
}
xlApp.Quit();
}
catch( Exception ex )
{
String errorMessage;
errorMessage = "Error: ";
errorMessage = String.Concat( errorMessage, ex.Message );
errorMessage = String.Concat( errorMessage, " Line: " );
errorMessage = String.Concat( errorMessage, ex.Source );
MessageBox.Show( errorMessage, "Error" );
}
}
Any Ideas?
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Hello,
I have a C# program that uses the Excel interop (Microsoft.Office.Interop.Excel) to monitor an Excel 2007 spreadsheet.
I use the delegate named WorkbookEvents_SheetChangeEventHandler which runs my custom code when any cell on the spreadsheet is updated. But the following code is not working..
I think I didn't use the delegate WorkbookEvents_SheetChangeEventHandler,correctly.Please let me know how to raise the event whenever the cell in excel file gets changed.
Thanks in advance.
using excel=Microsoft.Office.Interop.Excel;
public event excel.WorkbookEvents_SheetChangeEventHandler SheetChange;
private void WorkbookSheetChange()
{
this.SheetChange += new excel.WorkbookEvents_SheetChangeEventHandler(workSheet_SheetChange);
}
void workSheet_SheetChange(object Sh, excel.Range Target)
{
Target = range;
string changedRange = Target.get_Address(1, 1,
excel.XlReferenceStyle.xlA1, 1, 1);
MessageBox.Show("The value of " + workSheet.Name + ":" +
changedRange + " was changed.");
}
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Hi,
According to FXCop, i must have arraylist property as read only (not setter).
i tried below method as was mentioned in msdn site(http://msdn.microsoft.com/en-us/library/ms182327(VS.80).aspx):
public ArrayList SomeStrings
{
get { return strings; }
// Violates the rule.
// set { strings = value; }
}
ArrayList newCollection = new ArrayList();
WritableCollection collection = new WritableCollection();
collection.SomeStrings = newCollection;
collection.SomeStrings.Clear();
collection.SomeStrings.AddRange(newCollection);
But at the point marked bold italic, i get error saying that the property is readonly.
I'm really stuck here, can anyone plz give m solution?
I need to set data to the arraylist, but its not FXCop compliant.
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I do not see your problem.
The error line functionality is achieved in the two lines below it. Same effect, just slightly longer to code, and possibly slightly slower to run.
More to the point, do you have to use an ArrayList? You would be better off using List<string>. 
Henry Minute
Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”
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Henry Minute wrote: do you have to use an ArrayList?
Sure, however the referenced MSDN page[^], although part of VS8, gave an example with ArrayList (which probably dated back from .NET 1.x)
Luc Pattyn [Forum Guidelines] [My Articles]
The quality and detail of your question reflects on the effectiveness of the help you are likely to get.
Show formatted code inside PRE tags, and give clear symptoms when describing a problem.
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Why are you using an ArrayList anyway? Are you using .NET 1?
Some things you could do:
- Create the new collection in the ctor of the containing class
- Make a method that takes an ArrayList and assigns that to the field/property which can then have a private setter (or no setter, if it's a field). This is not actually a good way though, it just sidesteps the problem and may generate an other warning
- Make a method that takes items to add to the ArrayList which may then not have to be exposed to the outside anymore
- Stop caring about FXCop (hey it's possible), what it says are not rules, but just guidelines. If you have good reason to ignore its advice then do it - or at least do not blindly follow its advice, following a mere guideline can cause an actual error (as is the case now).
Following the guidelines can lead to a good design, but also to hacking around just to follow guidelines while actually making the design worse.
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harold aptroot wrote: Why are you using an ArrayList anyway?
Right, however the referenced MSDN page[^], although part of VS8, gave an example with ArrayList (which probably dated back from .NET 1.x)
Luc Pattyn [Forum Guidelines] [My Articles]
The quality and detail of your question reflects on the effectiveness of the help you are likely to get.
Show formatted code inside PRE tags, and give clear symptoms when describing a problem.
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Alright, so that site has an excuse, but he could/should have changed it IMO
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Hi,
FYI: cops aren't always right, and you can change the rules if you don't like them.
The MSDN example looks OK.
You must choose between 2 possibilities:
1. SomeStrings has no setter, and collection.SomeStrings = newCollection; does not compile,
however you can use Clear() and AddRange() instead, as suggested by the MSDN page.
2. SomeStrings has a setter, collection.SomeStrings = newCollection; works, and unmodified FXCop complains, however FXCop with a new or modified rule could be made to agree
Luc Pattyn [Forum Guidelines] [My Articles]
The quality and detail of your question reflects on the effectiveness of the help you are likely to get.
Show formatted code inside PRE tags, and give clear symptoms when describing a problem.
modified on Monday, August 24, 2009 9:23 AM
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I suggest:
public List<string> SomeStrings { get; private set; }
A train station is where the train stops. A bus station is where the bus stops. On my desk, I have a work station....
_________________________________________________________
My programs never have bugs, they just develop random features.
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