Problem with List<> - .NET (Core and Framework) Discussion Boards

Linq and IEnumerable - case insensitive?

shn40023-Dec-09 16:31

3-Dec-09 16:31

I have this piece of code that "selects" from an Excel data stream and also from an XML one:
foreach (var ex in dataExcel)
{
ExcelRecs++;
IEnumerable<xelement> part =
from item in Partlists.Descendants("Partx")
where (string)item.Element("Part_name") == ex.Name
select item;

.....
}

How do I make the comparison "case INSENSITIVE"? that is either one of item.Element("Part_name") or ex.Name can be upper case and the other lower case, the == comparise would still be true.

Thanks for your help!

Re: Linq and IEnumerable - case insensitive?

Luc Pattyn3-Dec-09 16:45

Luc Pattyn

3-Dec-09 16:45

you want to compare two strings in a special way?
what class could possibly help you?
and what would be a nice name for a relevant method in such class?

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]

I only read code that is properly indented, and rendered in a non-proportional font; hint: use PRE tags in forum messages

Re: Linq and IEnumerable - case insensitive?

Mark Salsbery3-Dec-09 19:27

Mark Salsbery

3-Dec-09 19:27

Luc Pattyn wrote:
what class could possibly help you?
and what would be a nice name for a relevant method in such class?

I know! I know!

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: Linq and IEnumerable - case insensitive?

Pete O'Hanlon3-Dec-09 23:49

Pete O'Hanlon

3-Dec-09 23:49

Luc Pattyn wrote:
you want to compare two strings in a special way?
what class could possibly help you?

Oooh oooh! Is it CompareTwoStrings.InASpecialWay?

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.

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Re: Linq and IEnumerable - case insensitive?

Luc Pattyn4-Dec-09 1:06

Luc Pattyn

4-Dec-09 1:06

you're giving it away!

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]

I only read code that is properly indented, and rendered in a non-proportional font; hint: use PRE tags in forum messages

Re: Linq and IEnumerable - case insensitive?

N a v a n e e t h3-Dec-09 16:52

N a v a n e e t h

3-Dec-09 16:52

Use string.Compare.

var part = from item in Partlists.Descendants("Partx")
where string.Compare((string)item.Element("Part_name"), ex.Name, true) == 0
select item;

Best wishes,
Navaneeth

Re: Linq and IEnumerable - case insensitive?

shn40023-Dec-09 17:23

shn4002

3-Dec-09 17:23

Thank you very much Navaneeth! That's what I was looking for!!

Problem with List<>

polomint3-Dec-09 7:40

polomint

3-Dec-09 7:40

Hi,

I have a problem with VS2010beta2 and .NET Framework Client Profile, although I would expect the problem to be something to do with my inexperienced coding.

I have this block of code..

struct sGamePort
{
    public string sgpProtocol;
    public UInt16 sgpPortStart;
    public UInt16 sgpPortEnd;
}

struct sGamePortItem
{
    public string sgpName;
    public List<sGamePort> sgpPortList;
}

List<sGamePortItem> sGames;


private sGamePort ParsePorts(string[] line)
{
    sGamePort gp = new sGamePort();
    gp.sgpProtocol = line[0];
    int num = line.Count();
    if (num == 2)
    {
        // single port opened...
        gp.sgpPortStart =  Convert.ToUInt16(line[1]);
        gp.sgpPortEnd = Convert.ToUInt16(line[1]);
    }
    if (num == 3)
    {
        // port range opened...
        gp.sgpPortStart = Convert.ToUInt16(line[1]);
        gp.sgpPortEnd = Convert.ToUInt16(line[2]);
    }
    return gp;
}

Where line is a string array which essentially holds some tokens.
ie.
line[0] = "NAME"
line[1] = "JOHN"
line[2] = "YOUNG"

Now, in a seperate function I have

sGamePortItem pi = new sGamePortItem();
pi.sgpProtocol = "TCP";
pi.sgpPortList.Add(ParsePorts(strCMD));

This gives me a Null Reference Exception, so I changed it to this...

sGamePortItem pi = new sGamePortItem();
pi.sgpProtocol = "TCP";
sGamePort test = new sGamePort();
test = ParsePorts(strCMD);
pi.sgpPortList.Add(test); // ERROR HERE

Now, the error only occurs on the specified line above.. What am I doing wrong? Is it to do with me using the new keyword incorrectly? Or do I not use 'new'?

Any help would be appreciated as this has been confusing me for a few hours now, lol

Thanks again.

John

Yippee Kai Yai
Signed Polomint.......

Re: Problem with List<>

vtchris-peterson3-Dec-09 7:57

vtchris-peterson

3-Dec-09 7:57

The problem is that your line:

public List<sGamePort> sgpPortList;

should be:

public List<sGamePort> sgpPortList = new List<sGamePort>();

Need to assign a target to sgpPortList before you dereference it, hence the null ref exception.

Re: Problem with List<> [modified]

polomint3-Dec-09 7:59

polomint

3-Dec-09 7:59

Damn, I knew it would be something trivial...

Thanks for waking me up to a silly mistake, Big Grin | :-D

EDIT:
Now I'm getting the error "cannot have instance field initializers in structs"...
Hmmm, this could be a pain...

EDIT AGAIN:
I realised what was wrong.. I hadn't been initialising the sGamePortItem in the list..

sGamePortItem pi = new sGamePortItem();
pi.sgpPortList = new List<sGamePort>();  // THIS WAS NEEDED.

Thank you for your help, it made me think more about the initialisation...

Yippee Kai Yai
Signed Polomint.......

modified on Thursday, December 3, 2009 2:09 PM

Re: Problem with List<>

puri keemti3-Dec-09 22:48

puri keemti

3-Dec-09 22:48

You need to initialize the list of the struct "sGamePortItem" before assigning the object.

Hold the parent session when calling a showModalDialog child

Jose Alvarez de Lara3-Dec-09 4:37

Jose Alvarez de Lara

3-Dec-09 4:37

Hi,

I am developing a web app in VB.NET 1.1. In some Webforms I call a showModalDialog child, but when I close it, the parent session is removed.

Please, how can I hold it?

Thanks in advance,
Jose Alvarez de Lara

Re: Hold the parent session when calling a showModalDialog child

puri keemti3-Dec-09 22:55

puri keemti

3-Dec-09 22:55

Modal dialogues can't refer to their parent using opener. You need to pass a reference to the parent in the second parameter to showModalDialog.

Re: Hold the parent session when calling a showModalDialog child

Jose Alvarez de Lara4-Dec-09 0:11

Jose Alvarez de Lara

4-Dec-09 0:11

Hi Puri,

That is what I did. And I maintain a conversation between then parent and the child.
I am thinking if it is possible to send the parent session to the child and bring it back
to the parent when close the child.

Thanks for your interesting,
Jose

Re: Hold the parent session when calling a showModalDialog child

Jose Alvarez de Lara7-Dec-09 8:37

Jose Alvarez de Lara

7-Dec-09 8:37

Hello,

There are two articles here in the Code Project. I am talking about "Those Crazy Popups" and "ASP.Net Modal Window Server Control". I am looking for something like them, but I need to fix those articles into my issue.

Any help will be appreciate.

Regards,
Jose

Re: Hold the parent session when calling a showModalDialog child

Jose Alvarez de Lara8-Dec-09 5:47

Jose Alvarez de Lara

8-Dec-09 5:47

Hi,

I have found the answer googling.

It is enough putting

Response.Cache.SetCacheability(HttpCacheability.NoCache)

in the Page_Load of pop up window.

On the other hand here is the code snippet,

Page1.aspx

function DoDo(){
window.showModalDialog("Show.aspx","aa");
}

<asp:linkbutton id="LinkButton1" onclientclick="DoDo()" runat="server">LinkButton
protected void Page_Load(object sender, EventArgs e)
{
Session["AA"] = "have a good day!";
}

Show.aspx

protected void Page_Load(object sender, EventArgs e)
{
if (Session["AA"] != null)
Response.Write(Session["AA"].ToString());
else
Response.Write("NULL..........");
}

I hope this help to other people.

Regards,
Jose

DesignSurface Serialization problems

nicolas.alonzo3-Dec-09 3:47

nicolas.alonzo

3-Dec-09 3:47

Hello,

I have folllowing problems on a customized DesignSurface. I Load and save the design in a sort of XAML File (proprietary).

- wenn I copy and Paste a TabControl, Order of TabPages is wrong (reversed). Objects come in the wrong order in the Serialize method of my IDesignerSerializationService implementation.

- Wenn I copy and paste a Context menu, the Paste operation fails for the menuitems. It says "Toolstripmenuitem cant be insert in Container of type Form".

- I Have IExtenderprovider on some controls (ToolStrip). How can I handle that ? wen I Paste, The Design surface searches an object with the same name on the destination surface.

Thanks

Re: DesignSurface Serialization problems

nicolas.alonzo21-Dec-09 22:05

nicolas.alonzo

21-Dec-09 22:05

No one knows something ?
Frown | :-(

ADO Delimiters: Space and Tab

T21022-Dec-09 17:56

T2102

2-Dec-09 17:56

I've been trying to find a webpage containing the syntax of connection strings, especially for Tab, Space, and multiple delimiters. Right now, I am trying to query a text file that is space delimited where I treat consecutive delimiters as one.

The following code snippet is from my connection string in C++ .NET

Extended Properties=\"text;HDR=Yes;FMT=Delimited(' ')\""

Do you know what the syntax should be and where I can find a page with a list of the delimiters with syntax? I have examples for csv format, but have not found other examples on google yet.

Re: ADO Delimiters: Space and Tab

RCoate2-Dec-09 20:13

RCoate

2-Dec-09 20:13

Have you tried www.connectionstrings.com/[^]?
I have not checked for text file connections, but that site has helped me when I can't remember connection string syntax.

Re: ADO Delimiters: Space and Tab

T21022-Dec-09 20:49

T2102

2-Dec-09 20:49

Yes, I already have checked connectionstrings.com. They have examples with Tab, semi-colon, and comma. I have not gotten a space delimiter to work however.

Save Variable Values to a file and start another application when unhandled error occurs

Mehdi Ghiasi2-Dec-09 2:51

Mehdi Ghiasi

2-Dec-09 2:51

I want to save variable Values to a file and start another application when unhandled error occurs.

Does anyone has any idea?

Regards
Mahdi Ghiasi

Re: Save Variable Values to a file and start another application when unhandled error occurs

Eddy Vluggen2-Dec-09 3:29

Eddy Vluggen

2-Dec-09 3:29

mahdigh wrote:
Does anyone has any idea?

About what exactly?

Writing things to a file shouldn't be much of a problem. There's an event[^] that's triggered when an unhandled exception occurs. Starting an application is done via Proces.Start[^].

That about covers it, I guess Smile | :)

I are Troll Suspicious | :suss:

Re: Save Variable Values to a file and start another application when unhandled error occurs

Mehdi Ghiasi2-Dec-09 3:33

Mehdi Ghiasi

2-Dec-09 3:33

Where is Proces.Start in VB?

Mahdi Ghiasi

Re: Save Variable Values to a file and start another application when unhandled error occurs

Eddy Vluggen2-Dec-09 4:11

Eddy Vluggen

2-Dec-09 4:11

mahdigh wrote:
Where is Proces.Start in VB?

In VB.NET you'll find it in the diagnostics namespace.

If you're using VB6, then there won't be a namespace. You'd use the built-in Shell function, or call the CreateProcess[^] API.

Hope this helps Smile | :)

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