Re: Custom Collection Class - C# Discussion Boards

Re: Dummy Math Questions

matthias s.22-May-07 8:31

matthias s.

22-May-07 8:31

thanks a lot. i'll try that tonight.

/matthias

I love deadlines. I like the whooshing sound they make as they fly by.
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Re: Dummy Math Questions

CPallini22-May-07 9:38

CPallini

22-May-07 9:38

So...Have a nice night!
Big Grin | :-D

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

generate and send snmp trap

EvilInide22-May-07 1:34

EvilInide

22-May-07 1:34

I have to generate and send snmp trap from my application/service on-start or on-stop in c#.net. I have been googled more than 15 days but unable to get any idea how to do this.

I am trying with winsnmp.dll and wmi,but I am newcomer to these and ultimately gets failure.

plz help how can i achive this

yours
ashis Smile | :)

ashis

Custom Collection Class

SakthiSurya22-May-07 1:18

SakthiSurya

22-May-07 1:18

Hi,

I want to create a Custom collection Class

Where i can store values by just

CollectionObject.Key=Value;

Is it Possible to do like this.

If not is it possible to create dynamic properties to a class.

Please Help me

Thanks

Sakthi.

Re: Custom Collection Class

Martin#22-May-07 1:40

Martin#

22-May-07 1:40

Hello,

You mean like this?

public object Key
{
    get
    {
        return this.List[List.Count-1]; //Allways returns the last member of the List
    }
    set
    {
        if(!this.List.Contains(value))
        {
            this.List.Add(value);
        }
    }
}

All the best,

MArtin

Re: Custom Collection Class

SakthiSurya22-May-07 1:56

SakthiSurya

22-May-07 1:56

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.

Re: Custom Collection Class

Martin#22-May-07 2:03

Martin#

22-May-07 2:03

Apart from, that I don't understand what you mean.
Why would you whant to do something like this? Confused | :confused:

Re: Custom Collection Class

Tim Paaschen22-May-07 2:26

Tim Paaschen

22-May-07 2:26

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

Re: Custom Collection Class

Martin#22-May-07 2:34

Martin#

22-May-07 2:34

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

Re: Custom Collection Class

SakthiSurya22-May-07 2:39

SakthiSurya

22-May-07 2:39

Hi,

Thank you very much for your Suggestion and Concern.

Regards,

Sakthi.

Re: Custom Collection Class

Tim Paaschen22-May-07 2:49

Tim Paaschen

22-May-07 2:49

Martin# wrote:
Think about that again! ...

I never said that it is a good idea - just that it is technically possible.

Regards,
Tim

Re: Custom Collection Class

Martin#22-May-07 2:54

Martin#

22-May-07 2:54

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

How to run Smart Client Application from web page

Rahul8322-May-07 1:07

Rahul83

22-May-07 1:07

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

Re: How to run Smart Client Application from web page

Tarakeshwar Reddy22-May-07 2:52

Tarakeshwar Reddy

22-May-07 2:52

Have a look at this msdn article.[^]

Re: How to run Smart Client Application from web page

Rahul8322-May-07 4:12

Rahul83

22-May-07 4:12

Hi Tarakeshwar..Thanks a lot..url given by u solved my problem instantly..

optional attribute in xml

pashitech22-May-07 0:47

pashitech

22-May-07 0:47

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.

Re: optional attribute in xml

Christian Graus22-May-07 1:16

Christian Graus

22-May-07 1:16

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 )

Re: optional attribute in xml

pashitech22-May-07 1:45

pashitech

22-May-07 1:45

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.

Re: optional attribute in xml

andre_swnpl22-May-07 1:19

andre_swnpl

22-May-07 1:19

You could extract the node and test the attribute to see if it is null. if it is null the attribute is not present.

what means Error: "No mapping exists from object type System.Windows.Forms.TextBox to a known managed provider native type."

shinelo200222-May-07 0:43

shinelo2002

22-May-07 0:43

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 Frown | :-(

((

saeed shafaee

Re: what means Error: "No mapping exists from object type System.Windows.Forms.TextBox to a known managed provider native type."

Guffa22-May-07 0:46

Guffa

22-May-07 0:46

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;

Re: what means Error: "No mapping exists from object type System.Windows.Forms.TextBox to a known managed provider native type."

Member 814227811-Feb-12 4:52

Member 8142278

11-Feb-12 4:52

Thanks for your answer

Sortable CollectionBase ?

Gavin Roberts22-May-07 0:36

Gavin Roberts

22-May-07 0:36

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

Re: Sortable CollectionBase ?

Pete O'Hanlon22-May-07 1:02

Pete O'Hanlon

22-May-07 1:02

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.

Re: Sortable CollectionBase ?

Gavin Roberts22-May-07 1:59

Gavin Roberts

22-May-07 1:59

Hmm,

This annoys me about .Net 2.0. I want a collection dedicated to one type, and they bring out generic collections?! Probably why i've not hit that part of .Net 2.0 just yet.

I've tried the following http://en.csharp-online.net/Understanding_Generics%E2%80%94Creating_a_Custom_Generic_Collection[^] but received errors.

I need to be able to have methods and custom properties for my collection, if there is a way to do this, i'd be greatful if you could let me know.

Thanks

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