C# Discussion Boards - CodeProject

hashtable within a hashtable

9-Jul-08 4:39

Christian Graus wrote:
What is an eml file ? I have no idea

Just looked it up in Thunderbird by saving an e-mail in this format. It's basically just the mail header as received from the mail server (from, to, subject, mime, content-type, return-path) and the message body.

I don't see how this can be used to send e-mail.

modified 12-Sep-18 21:01pm.

benjamin yap9-Jul-08 4:02

benjamin yap

9-Jul-08 4:02

Hi, i got a hashtable within a hashtable. How do i retrive the property from the inner hashtable

I got this orderTable which store a Order object.

Inside my Order object, i have a Hashtable itemList as a attributes. The itemList will store a product object which have the property ModelNumber

foreach (Order order in orderTable.Values)
{
    if (order.ItemList.ContainsKey(Convert.ToString(p.ModelNumber)))
    {
        uint modelNum = ((Product)order.ItemList[p.ModelNumber]).ModelNumber;
        string cellValue = Convert.ToString(p.ModelNumber);
        if (cellValue == Convert.ToString(modelNum))
        {
            dataGridProduct.Rows[currentRow].Cells["colSelect"].Value = true;
        }
    }
}

this is what i do, but i get

Object reference not set to an instance of an object.

on this line

uint modelNum = ((Product)order.ItemList[p.ModelNumber]).ModelNumber;

Christian Graus9-Jul-08 4:07

9-Jul-08 4:07

benjamin yap wrote:
order.ItemList[p.ModelNumber]

This, by definition, returns a hashtable, not a Product. That's what you said, right ? That returns a hash table, so you need to pull the value out of that hash table. I am surprised you don't get an invalid cast exception.

Christian Graus

No longer a Microsoft MVP, but still happy to answer your questions.

benjamin yap9-Jul-08 4:11

benjamin yap

9-Jul-08 4:11

i cast a (Product) infront already and i just do a .ModelNumber

issint this pulling out the value? i tried many ways but cant seems to work. Probably you could help me with it?

Christian Graus9-Jul-08 4:14

9-Jul-08 4:14

The other response makes sense. I think what you said is wrong, I don't think you have a hashtable of hashtables. I think you're using a bad key, or a key to a value that was stored as null.

Christian Graus

No longer a Microsoft MVP, but still happy to answer your questions.

User 66589-Jul-08 4:13

9-Jul-08 4:13

Christian Graus wrote:
This, by definition, returns a hashtable, not a Product.

I guess ItemList is already the inner hashtable which will, when accessing the indexer, return a Product

regards

modified 12-Sep-18 21:01pm.

Christian Graus9-Jul-08 4:15

9-Jul-08 4:15

I guess so, I was just looking for the code that does what he asked about - accesses an object that is two hashes deep.

Christian Graus

No longer a Microsoft MVP, but still happy to answer your questions.

User 66589-Jul-08 4:10

9-Jul-08 4:10

benjamin yap wrote:
this is what i do, but i get

Object reference not set to an instance of an object.

on this line

This may have several reasons:

- order is null
- the returned Product may be null: You are checking ContainsKey with a string (Convert.ToString(p.ModelNumber)), but pass some other data type to the hashtable key (p.ModelNumber)

Try this:

foreach (Order order in orderTable.Values)
{
    string modelNumberStr = Convert.ToString(p.ModelNumber);
    if (order != null && order.ItemList.ContainsKey(modelNumberStr))
    {
        uint modelNum = ((Product)order.ItemList[modelNumberStr]).ModelNumber;
        string cellValue = modelNumberStr;
        if (cellValue == Convert.ToString(modelNum))
        {
            dataGridProduct.Rows[currentRow].Cells["colSelect"].Value = true;
        }
    }
}

regards

modified 12-Sep-18 21:01pm.

Windows Service accessing DMZ resources

benjamin yap9-Jul-08 4:31

benjamin yap

9-Jul-08 4:31

thanks! i got it working! thanks to you both!

newc19-Jul-08 3:46

newc1

9-Jul-08 3:46

Apologies if this is not in the correct forum, but hopefully someone can help with the below issue:

I have a C# Windows Service (.Net 2.0) that is to be installed on a collection of web servers in the DMZ. The Windows Service implements a FileSystemWatcher to check for changes to a set of specific CSV files held on a network share, and will copy locally any updated files before importing these to a local SQL database.

The distribution server that will hold the updated CSV files is also in the DMZ.

The problem:
How can I set up the Windows Service / distribution server so that the service can access the network share securely? It seems that no matter how I set the service up i.e. running as LocalSystem, LocalService, NetworkService or a specific user account (can only be a local account as no access to AD in the DMZ) I get System.UnauthorisedAccessException's occuring when attempting to set up the FileSystemWatcher.

Any help would be greatly appreciated.

Clean code is the key to happiness.

Stop Timer Plz.

Member 34356149-Jul-08 3:32

Member 3435614

9-Jul-08 3:32

I created one page which contain one timer which will execute some function after every 5 min and send one mail to my id. Now the problem is i m not able to stop that one after every 5 min i receive mails. I close that page so it not execute but still it is running. How to stop that timer.

Re: Stop Timer Plz.

stancrm9-Jul-08 3:54

stancrm

9-Jul-08 3:54

timer.Stop() or timer.Enabled=false.

Re: Stop Timer Plz.

Christian Graus9-Jul-08 3:56

c# GUI for mapping two different databases

9-Jul-08 3:56

Please don't double post. This is an ASP.NET question, you asked it there. The person who answered you assumed you knew where to post and gave you a winforms answer.

Christian Graus

No longer a Microsoft MVP, but still happy to answer your questions.

Re: Stop Timer Plz.

#realJSOP9-Jul-08 9:15

#realJSOP

9-Jul-08 9:15

Turn off the computer in question

-or-

Configure your email spam filter to block all messages from that server.

"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001

sarmstrong039-Jul-08 3:05

sarmstrong03

9-Jul-08 3:05

posted 30 June 2008 12:35
--------------------------------------------------------------------------------
I would like to create a GUI that allows a user to view 2 database tables and then drag and drop mappings - mapping the columns from database 1 to the columns in database 2. Does anyone know of an open source project/3rd party dll that does something similar, or any relevant tutorials?

Something similar to this:
http://www.schemaware.com/mapper_db.htm[^]

Thanks for any help.

Redirecting to a new .aspx page

WebMaster9-Jul-08 2:31

WebMaster

9-Jul-08 2:31

Hi everyone
I want to redirect from a .aspx page to another page while the page has been sent to client so by using Response.Redirect() method, I get an error saying "Response is not available in this context."
I also used Server.Transfer() method, this one created an error saying "error in executing child node"
Does anyone know what I may use instead of Response.Redirect() and Server.Transfer()?

Re: Redirecting to a new .aspx page

leppie9-Jul-08 2:37

leppie

9-Jul-08 2:37

If Reponse.Redirect does not work, something is very broken on your web page. I suggest you ask in the ASP.NET forum.

xacc.ide - now with TabsToSpaces support
IronScheme - 1.0 alpha 4a out now (29 May 2008)

Re: Redirecting to a new .aspx page

ITS79-Jul-08 10:53

ITS7

9-Jul-08 10:53

I think you try to call Redirectmethod outer than pageclass.
Use :

using System.Web.HttpContext;
.
.
.
.
HttpContext.Current.Response.Redirect(url);

I hope it helps you

ITS7

iis pick up service

shababnet9-Jul-08 2:26

shababnet

9-Jul-08 2:26

what is the iis pick up service?
How to send e-mail from desktop application in .net using iis pick up service?

Index was outside the bounds of the array

NewToAspDotNet9-Jul-08 1:45

NewToAspDotNet

9-Jul-08 1:45

Hi All,
I have a datatable and i want to get the first and second characters of a column of each row of my datatable:

foreach (DataRow dr in dt.Rows)
      {
               string str = dr[5].ToString();
               char first = str[0];
               char second = str[1];
      }

Bud i m getting a error: Index was outside the bounds of the array
on the 5e line : char second = str[1];
can anyone tell me why and what is the solution?

Thanx

Re: Index was outside the bounds of the array

leppie9-Jul-08 1:48

leppie

9-Jul-08 1:48

KamarBand wrote:
string str = dr[5].ToString();

You should use the value inside the DataColumn, not the DataColumn itself (let me guess the column name is only 1 character).

xacc.ide - now with TabsToSpaces support
IronScheme - 1.0 alpha 4a out now (29 May 2008)

Re: Index was outside the bounds of the array

NewToAspDotNet9-Jul-08 1:55

NewToAspDotNet

9-Jul-08 1:55

Hi Leppie, thanx fory reply, i found the problem, one of the rows had a empty string, that's why i got the error.

Re: Index was outside the bounds of the array

User 66589-Jul-08 1:53