Generics problem - C# Discussion Boards

Re: I have a repetition in crystal report because the datasource are two joined tables?

Dave Kreskowiak3-Aug-10 10:02

3-Aug-10 10:02

I suspect the reason why you're getting the results you are is because of the JOIN type that has been used in the SQL query. You'll have to craft the SQL statement to return your proper results yourself. You may want to read up on the different join types [^] to understand how they work before proceding.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak

Re: I have a repetition in crystal report because the datasource are two joined tables?

akhil khare3-Aug-10 21:40

akhil khare

3-Aug-10 21:40

Either You not using internal link in data sources at crystal report end or you not use grouping option for that Laugh | :laugh:

Akhil Khare

Re: I have a repetition in crystal report because the datasource are two joined tables?

firas_hamzeh3-Aug-10 22:47

firas_hamzeh

3-Aug-10 22:47

I made sure that I used internal link in data sources.
If I was using grouping option would it get ride of the repetition of data?
could you please tell me what is the main goal of grouping option.
Thank you for being very helpful Wink | ;)

Re: I have a repetition in crystal report because the datasource are two joined tables?

akhil khare3-Aug-10 23:39

akhil khare

3-Aug-10 23:39

Actually when data will replicate then ther must be a comman data which are replicate so when we use th e group option on that particluar data feild then it grouped as per condition

e.g.

City Amount
DElhi 10000
DElhi 500
delhi 1500

Now after Group on CIty Feild it will

DElhi
---------> What u wanna to shown Big Grin | :-D

Re: I have a repetition in crystal report because the datasource are two joined tables?

firas_hamzeh4-Aug-10 0:25

firas_hamzeh

4-Aug-10 0:25

I don't think that my pronlem will be sovlved using group option, because in the result I obtained there are some data seemed to be as a mixed data resaulted from joining, I mean there are some error data row and I don't want to group them but get ride of them ..
Please read my problem agin to see what is the exact problem !!
Thanks,

Outlook 2007 Navigation Pane

Sean Robert Wright3-Aug-10 4:05

Sean Robert Wright

3-Aug-10 4:05

Hello,

Does anyone know if it is possible to programmatically add a panel to the Outlook 2007 Navigation pane?

Thanks,

Sean

Re: Outlook 2007 Navigation Pane

Ravi Bhavnani3-Aug-10 6:26

Ravi Bhavnani

3-Aug-10 6:26

I suspect VSTO will let you do this. Meanwhile, this[^] article may provide a starting point.

/ravi

My new year resolution: 2048 x 1536
Home | Articles | My .NET bits | Freeware

ravib(at)ravib(dot)com

Generics problem

kapax53-Aug-10 4:00

kapax5

3-Aug-10 4:00

There are following classes:

public class X
    {
    Int32[] a;
    public List<Int32> xxx()
        { ... }
    }

public class Y
    {
    List<Int32> a;
    public List<Int32> xxx()
        { ... }
    }

What I am trying to do is to find a generic way to make the class of similar descent:

public class GenericClass<T> where T : IEnumerable
    {
    T a;
    public List</*Type of the elements in the IEnumerable T*/> xxx()
        { .... }
    }

No ideas come to my head. Maybe some will come to yours'? I understand that the problem is that IEnumerable is not generic but maybe there will be any clever solutions Smile | :)

Re: Generics problem

Ennis Ray Lynch, Jr.3-Aug-10 4:17

Ennis Ray Lynch, Jr.

3-Aug-10 4:17

public class Foo<T> : IEnumerable<T> {
    private List<T> someList;	
    IEnumerator<T> IEnumerable<T>.GetEnumerator();
    System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator();
}

Need custom software developed? I do custom programming based primarily on MS tools with an emphasis on C# development and consulting. I also do Android Programming as I find it a refreshing break from the MS.

"And they, since they Were not the one dead, turned to their affairs" -- Robert Frost

Re: Generics problem

Łukasz Nowakowski3-Aug-10 4:20

Łukasz Nowakowski

3-Aug-10 4:20

I don't know if I understand your problem, but if I'm correct, you should do

public class GenericClass<T>
{
    T a;
    public List<T> xxx()
        { .... }
}

If it's not what you want, write about your problem in more details.

Don't forget to rate answer, that helped you. It will allow other people find their answers faster.

Re: Generics problem

kapax53-Aug-10 4:37

kapax5

3-Aug-10 4:37

You see, if I instantiate this class like this:

new GenericClass<Int32[]>();

,
then what xxx() returns is List<Int32[]>, although it should return List<Int32>.

Now, if I instantiate the class this way:

new GenericClass<List<Int32>>();

,
then xxx() will return List<List<Int32>>, but it should also return List<Int32>.

That is why I think that IEnumerable is the way to go for T.

I am starting to think that my idea is conceptually wrong, since I cannot think of anything that would work.

Re: Generics problem

DaveyM693-Aug-10 4:40

DaveyM69

3-Aug-10 4:40

Your problem is you need T to be the type of element, not a collection of so your IEnumerable idea isn't going to work.

I think you need something like this:

public class GenericClass<T>
{
    private List<T> a = null;

    public GenericClass(IEnumerable<T> items)
    {
        if (items != null)
            a = new List<T>(items);
    }

    public List<T> Xxx()
    {
        return a;
    }
}

Dave

If this helped, please vote & accept answer!

Binging is like googling, it just feels dirtier.
Please take your VB.NET out of our nice case sensitive forum.(Pete O'Hanlon)

BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)

Re: Generics problem

kapax53-Aug-10 4:42

kapax5

3-Aug-10 4:42

Yes, that's what I needed! Simple and elegant. Thank you!

Re: Generics problem

DaveyM693-Aug-10 4:44

DaveyM69

3-Aug-10 4:44

You're welcome Smile | :)

Dave

If this helped, please vote & accept answer!

Binging is like googling, it just feels dirtier.
Please take your VB.NET out of our nice case sensitive forum.(Pete O'Hanlon)

BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)

View Desktop of another pc using C# program

ayandelhi3-Aug-10 3:15

ayandelhi

3-Aug-10 3:15

Hi!!

Can we make a program which can access the display of a pc from another... just see the desktop(not manipulate it)...

Re: View Desktop of another pc using C# program

Dave Kreskowiak3-Aug-10 4:13

Dave Kreskowiak

3-Aug-10 4:13

It's the same as doing it with the manipulation capability. You need to have 2 apps. One running on your monitor machine that shows you what's on the remote desktop and an app running on the remote desktop that puts the screen view together and sends it to your monitoring workstation. Google for "C# VNC" and you'll find examples and libraries.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak

C# program to recover data

ayandelhi3-Aug-10 2:11

ayandelhi

3-Aug-10 2:11

Hi!!

M back...
i really need to understand the concept of data recovery...
can we make any program which can do data recovery using C#???

Thanks...

Re: C# program to recover data

AhsanS3-Aug-10 2:53

AhsanS

3-Aug-10 2:53

Concept of data recovery is hard to explain here. In short for writing a sw in c#
you have to wrap low level API's. Not directly possible.

Ahsan Ullah
Senior Software Engineer
MCTS 2.0

Re: C# program to recover data

ayandelhi3-Aug-10 3:16

ayandelhi

3-Aug-10 3:16

How shud i do it???

Re: C# program to recover data

Dave Kreskowiak3-Aug-10 4:11

Dave Kreskowiak

3-Aug-10 4:11

What you do and how you write it depends on exactly what you're trying to recover and the device you're trying to recover it from as well as the condition that it's in. You haven't specified what you mean by "data recovery", therefore, it's impossible to tell you what you have to do or if it's even possible to write in C#.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak

Re: C# program to recover data

ayandelhi4-Aug-10 4:38

ayandelhi

4-Aug-10 4:38

I want to know if a can recover deleted data from a IDE/SATA HDD, using a c# program....

Do i need to know abt ASM to do it???

often an corrupt hdd is sent for replacement, n the data is lost... cant we make any program or such thing which can recover data from a drive to another(good ) drive...

Re: C# program to recover data

Dave Kreskowiak4-Aug-10 15:00

Dave Kreskowiak

4-Aug-10 15:00

You don't need ASM to do it. You just need to have a VERY GOOD knowledge of how the internals of NTFS works, how files are actually deleted, how a disk is organized, and how to read wirte secotrs on the disk.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak

how to disable selection in context menu

NarVish3-Aug-10 2:02

NarVish

3-Aug-10 2:02

Hi,

I've a context menu with two levels. I would like to disable selection in second level. To describe in detail,
level-1->Level-2
AAAAAAA->aa1
aa2
aa3
BBBBBBB->bb1
bb2
bb3

If I select items(AAAAAAA,BBBBBBB) in Level 1, level-2 items gets pop-up. I should disable the selection in Level-2. Please let me know how to achieve this. Thanks in advance.

Re: how to disable selection in context menu

OriginalGriff3-Aug-10 2:18

OriginalGriff

3-Aug-10 2:18

Use the ContextMenu.ContextMenuOpening event http://msdn.microsoft.com/en-us/library/bb613568.aspx[^]

Real men don't use instructions. They are only the manufacturers opinion on how to put the thing together.

Re: how to disable selection in context menu

EliottA3-Aug-10 2:18

EliottA

3-Aug-10 2:18

Wouldn't you use the Enabled property on your sub items to achieve this behavior?

Check out the CodeProject forum Guidelines[^]
The original soapbox 1.0 is back![^]

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.