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Hello,
You mean like this?
public object Key
{
get
{
return this.List[List.Count-1];
}
set
{
if(!this.List.Contains(value))
{
this.List.Add(value);
}
}
}
All the best,
MArtin
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Hi Martin,
Thanks for your reply.
CollectionObject.Key = Value;
Key here refers the key to be stored in the collection class for
Reference.
Forexample
Dictionary<string,string> MyDict=new Dictionary<string,string>()
MyDict[Key] = Value;
Instead of using [](Square Braces i just want to use dot(.) Symbol.
Regards,
Sakthi.
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Apart from, that I don't understand what you mean.
Why would you whant to do something like this? 
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This is a really strange idea! All possible keys must be known at compile-time.
However, technically this can be achieved by adding a Dictionary member to you custom Collection and provide a property for each possible key that just wraps the indexer of the dictionary.
Regards,
Tim
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Tim Paaschen wrote: This is a really strange idea!
I do agree!
Tim Paaschen wrote: and provide a property for each possible key
Think about that again! (He will set a long time infront of his computer, and than one day his heart will stop beating)
As we all don't whant him to die infront of the computer writing this "strange" program, we should tell him to search for a better solution!
All the best,
Martin
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Hi,
Thank you very much for your Suggestion and Concern.
Regards,
Sakthi.
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Martin# wrote: Think about that again! ...
I never said that it is a good idea - just that it is technically possible.
Regards,
Tim
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Hello (Hallo) Tim,
Tim Paaschen wrote: I never said that it is a good idea
I know, and my answere was more meant as a joke than a critic on your statement.
Tim Paaschen wrote: just that it is technically possible
Technically possible, would be a set of keys which he defines during design time.
"All possible Keys" is not technically possible!
All the best (Noch einen schönen Tag)
Martin
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Hi friends..
I have designed one simple windows application in which i am retrvng data from data base and populating it to the grid..I build the solutn and have an .exe file for the same..
Now I am designing a web page with a button on it..I want that windows application to run on click of that button ..though I used java script and used windows.open(".exe path name")..i m still facing the problem..can anyone plz help me..
regards,
Rahul
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Hi Tarakeshwar..Thanks a lot..url given by u solved my problem instantly..
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i am using an xml file which has an optional atributes.
Now i want to know that there is no attribute for the node dynamically
prashanth,
s/w Engineer,
Syfnosys.
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How are you examining the XML ?
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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my xml file is
<?xml version="1.0"?>
<lasers xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="laserProp.xsd">
<laser LaserName="Laser1" ModelName="Nufern v1.0" SerialNo="1" ManufacturerName="Nufern v1.0" Maximumpower="200">
<properties>
<image>CW-Waveform.jpg</image>
<WaveTypes>
<WaveType Name="CW Waveform" url="CWwaveform.html" isavailable="true"/>
<WaveType Name="Relaxation Oscillation Envelope" url="RelaxOscillation.html" isavailable="true"/>
</WaveTypes>
<tabular>
<property id="40" name="IP" prgbar="false" selected="false" pwd="true" units="C" gauge="false"/>
<property id="200" name="Output Power" prgbar="true" selected="true" min="0" max="200" pwd="false" units="W" gauge="true" amberthresholdval="201" amberwarning="Output Power is near upper limit."/>
</tabular>
</properties>
</laser>
</lasers>
I am reading xml like this
xmldoc2.LoadXml(objXmlTasks.decrypt());
XmlNodeList xmlchildnodelst = xmldoc2.SelectNodes("/lasers/laser[@LaserName='" + laseridval + "']/properties/tabular/property[@name='" + childLaserSelectedName + "']");
for first child node in tabular node there is no attribute("amberthresholdval") so below statement is giving exception
xmlchildnodelst.Item(0).Attributes.GetNamedItem("amberthresholdval").Value
prashanth,
s/w Engineer,
Syfnosys.
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You could extract the node and test the attribute to see if it is null. if it is null the attribute is not present.
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when run my program,in ExecuteNonQuery,give me Error : No mapping exists from object type System.Windows.Forms.TextBox to a known managed provider native type. plz help me  ((
saeed shafaee
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You are trying to feed a windows control to the database, and it doen't know what to do with it.
I suppose that what you really want to do is to get the value of the Text property from the control and feed to the database instead.
---
single minded; short sighted; long gone;
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Hi all,
I'm working on an application, and being new to 2.0 I need some help.
I have a Custom Collection which inherits CollectionBase and i'm using this as a DataGridView datasource. All is fine, apart from the Sorting does not work anymore (I used to manually add each row.) When I tried to use Sort, it complained that my CollectionBase does not inherit the IBindingList class.
I've tried but I never really got far.
Does anyone have any examples which will help me?
<br />
using System;<br />
using System.Collections;<br />
using System.Windows.Forms;<br />
using System.Text;<br />
using System.ComponentModel;<br />
<br />
namespace HelpDesk<br />
{<br />
class RequestCollection : CollectionBase<br />
{<br />
public void Add(Request r)<br />
{<br />
r.Parent = this;<br />
List.Add(r);<br />
}<br />
public Request this[int index]<br />
{<br />
get { return (Request)List[index]; }<br />
set { List[index] = value; }<br />
}<br />
private ImageList _Images;<br />
public ImageList Images<br />
{<br />
get { return _Images; }<br />
set { _Images = value; }<br />
}<br />
<br />
public int OpenCount<br />
{<br />
get<br />
{<br />
int ReturnValue = 0;<br />
foreach (Request r in List)<br />
{<br />
if (r.Status == RequestStatus.Open)<br />
ReturnValue++;<br />
}<br />
return ReturnValue;<br />
}<br />
}<br />
public int PendingCount<br />
{<br />
get<br />
{<br />
int ReturnValue = 0;<br />
foreach (Request r in List)<br />
{<br />
if (r.Status == RequestStatus.Pending)<br />
ReturnValue++;<br />
}<br />
return ReturnValue;<br />
}<br />
}<br />
public int ImmediateCount<br />
{<br />
get<br />
{<br />
int ReturnValue = 0;<br />
foreach (Request r in List)<br />
{<br />
if (r.Priority == RequestPriority.Immediate)<br />
ReturnValue++;<br />
}<br />
return ReturnValue;<br />
}<br />
}<br />
public int HighCount<br />
{<br />
get<br />
{<br />
int ReturnValue = 0;<br />
foreach (Request r in List)<br />
{<br />
if (r.Priority == RequestPriority.High)<br />
ReturnValue++;<br />
}<br />
return ReturnValue;<br />
}<br />
}<br />
}<br />
}<br />
Thanks
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You may want to use a generic list instead. This article[^] shows you how to add a generic sort routine.
Deja View - the feeling that you've seen this post before.
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I use List<...> for a lot of code. I find it convenient to be able to have a wrapped list. Here's an example with a simple method to demonstrate how easy it is:
using System.Collections.Generic;
using System;
namespace Generics.Test
{
public class TestGeneric
{
public TestGeneric()
{
MyList<MyTest> test = new MyList<MyTest>();
test.Add(new MyTest("Test 1"));
test.Add(new MyTest("Test 2"));
if (test.HasValue("Test 2"))
Console.WriteLine("Test 2 is present");
}
}
public interface ISomeValue
{
string SomeValue { get; set; }
}
public class MyList<T> : List<T>, IEnumerable<T> where T : ISomeValue
{
public bool HasValue(string key)
{
foreach (T item in this)
{
if (item != null && item.SomeValue == key)
return true;
}
return false;
}
#region IEnumerable<T> Members
IEnumerator<T> IEnumerable<T>.GetEnumerator()
{
for (int i = 0; i < this.Count; i++)
{
yield return this[i];
}
}
#endregion
#region IEnumerable Members
System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
{
throw new Exception("The method or operation is not implemented.");
}
#endregion
}
}
Deja View - the feeling that you've seen this post before.
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Thanks for the sample code. I've gone to use it this morning and hit another problem.
I've created this:
<br />
public interface RequestCollectionInterface<br />
{<br />
ImageList Images { get; set; }<br />
int OpenCount { get; }<br />
int PendingCount { get; }<br />
int ImmediateCount { get; }<br />
int HighCount { get; }<br />
}<br />
public class RequestCollection<T> : List<T>, IEnumerable<T> where T : RequestCollectionInterface<br />
{<br />
IEnumerator<T> IEnumerable<T>.GetEnumerator()<br />
{<br />
for (int i = 0; i < this.Count; i++)<br />
{<br />
yield return this[i];<br />
}<br />
}<br />
IEnumerator IEnumerable.GetEnumerator()<br />
{<br />
throw new Exception("The method or operation is not implemented.");<br />
}<br />
public int OpenCount<br />
{<br />
get<br />
{<br />
int ReturnValue = 0;<br />
foreach (Request item in this)<br />
{<br />
if (item.Status == RequestStatus.Open)<br />
ReturnValue++;<br />
}<br />
return ReturnValue;<br />
}<br />
}<br />
public int PendingCount<br />
{<br />
get<br />
{<br />
int ReturnValue = 0;<br />
foreach (Request item in this)<br />
{<br />
if (item.Status == RequestStatus.Pending)<br />
ReturnValue++;<br />
}<br />
return ReturnValue;<br />
}<br />
}<br />
public int ImmediateCount<br />
{<br />
get<br />
{<br />
int ReturnValue = 0;<br />
foreach (Request item in this)<br />
{<br />
if (item.Priority = RequestPriority.Immediate)<br />
ReturnValue++;<br />
}<br />
return ReturnValue;<br />
}<br />
}<br />
public int HighCount<br />
{<br />
get<br />
{<br />
int ReturnValue = 0;<br />
foreach (Request item in this)<br />
{<br />
if (item.Priority = RequestPriority.High)<br />
ReturnValue++;<br />
}<br />
return ReturnValue;<br />
}<br />
}<br />
}<br />
And tried using it like this:
<br />
<br />
private RequestCollection<Request> __GetRequests()<br />
{<br />
RequestCollection<Request> rc = new RequestCollection<Request>();<br />
Request r = new Request();<br />
r.Id = 1;<br />
r.Summary = "This is a test";<br />
r.To = "Test";<br />
r.From = new User();<br />
r.Priority = RequestPriority.Normal;<br />
r.Status = RequestStatus.Open;<br />
r.Created = DateTime.Now;<br />
r.Assigned = r.Created;<br />
r.Parent = rc;<br />
r.Hours = r.Created.Subtract(r.Assigned).Hours;<br />
<br />
rc.Add(r);<br />
return rc;<br />
}<br />
but I get the following error:
<br />
Error 3 The type 'HelpDesk.Request' must be convertible to 'HelpDesk.RequestCollectionInterface' in order to use it as parameter 'T' in the generic type or method 'HelpDesk.RequestCollection<T>' C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\HelpDesk\HelpDesk\DataAccess.cs 66 44 HelpDesk<br />
this is my Request code:
<br />
class Request<br />
{<br />
private int _Id;<br />
private string _Summary;<br />
private User _From;<br />
private string _To;<br />
private RequestPriority _Priority;<br />
private RequestStatus _Status;<br />
private DateTime _Created;<br />
private DateTime _Assigned;<br />
private DateTime _LastChanged;<br />
private double _Hours;<br />
private RequestCollection<Request> _Parent;<br />
<br />
public int Id<br />
{<br />
get { return _Id; }<br />
set { _Id = value; }<br />
}<br />
public string Summary<br />
{<br />
get { return _Summary; }<br />
set { _Summary = value; }<br />
}<br />
public User From<br />
{<br />
get { return _From; }<br />
set { _From = value; }<br />
}<br />
public string To<br />
{<br />
get { return _To; }<br />
set { _To = value; }<br />
}<br />
public RequestPriority Priority<br />
{<br />
get { return _Priority; }<br />
set { _Priority = value; }<br />
}<br />
public RequestStatus Status<br />
{<br />
get { return _Status; }<br />
set { _Status = value; }<br />
}<br />
public DateTime Created<br />
{<br />
get { return _Created; }<br />
set { _Created = value; }<br />
}<br />
public DateTime Assigned<br />
{<br />
get { return _Assigned; }<br />
set { _Assigned = value; }<br />
}<br />
public DateTime LastChanged<br />
{<br />
get { return _LastChanged; }<br />
set { _LastChanged = value; }<br />
}<br />
public double Hours<br />
{<br />
get { return _Hours; }<br />
set { _Hours = value; }<br />
}<br />
public RequestCollection<Request> Parent<br />
{<br />
get { return _Parent; }<br />
set { _Parent = value; }<br />
}<br />
public Image PriorityImage<br />
{<br />
get<br />
{<br />
Image ReturnValue = null;<br />
try<br />
{<br />
if (this.Parent != null && this.Parent.Images != null)<br />
ReturnValue = this.Parent.Images.Images[(int)this.Priority];<br />
}<br />
catch (Exception ex)<br />
{<br />
int i = 99;<br />
}<br />
return ReturnValue;<br />
}<br />
}<br />
}<br />
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using System;
using System.Collections.Generic;
using System.Text;
namespace TestIterator
{
class Program
{
static void Main(string[] args)
{
RequestItemCollection<Request> coll = new RequestItemCollection<Request>();
Request req = new Request();
req.Status = RequestStatus.Open;
coll.Add(req);
req = new Request();
req.Status = RequestStatus.Open;
coll.Add(req);
System.Console.WriteLine("Open count = {0}", coll.OpenCount);
Console.ReadLine();
}
}
public class RequestItemCollection<T> : List<T>, IEnumerable<T> where T: IStatus
{
#region IEnumerable<T> Members
IEnumerator<T> IEnumerable<T>.GetEnumerator()
{
for (int i = 0; i < this.Count; i++)
yield return this[i];
}
#endregion
#region IEnumerable Members
System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
{
throw new Exception("The method or operation is not implemented.");
}
#endregion
public int OpenCount
{
get
{
return StatusCount(RequestStatus.Open);
}
}
public int Closed
{
get
{
return StatusCount(RequestStatus.Closed);
}
}
private int StatusCount(RequestStatus status)
{
int count = 0;
foreach (T item in this)
{
if (item.Status == status)
count++;
}
return count;
}
}
public enum RequestStatus
{
Open,
Closed,
Pending
}
public interface IStatus
{
RequestStatus Status { get; set; }
}
public class Request : IStatus
{
private RequestStatus _status;
#region IStatus Members
public RequestStatus Status
{
get
{
return _status;
}
set
{
_status = value;
}
}
#endregion
}
}
Deja View - the feeling that you've seen this post before.
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Hello,
I think you have to call the Sort method of the InnerList property.
There you have to pass an instance of a UserComparer class inheritet from IComparer.
For excample, if your Request class has a Name property which you whant to use for sorting:
public class YourComparer : IComparer
{
int IComparer.Compare( object x, object y )
{
Request request_x= x as Request ;
Request request_y= y as Request ;
if((request_x!=null)&&(request_y!=null))
{
return( (new CaseInsensitiveComparer()).Compare( request_x.Name, request_y.Name ) );
}
else
{
return 0;
}
}
}
Hope it helps!
All the best,
Martin
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