C# Discussion Boards - CodeProject

musefan15-Jul-09 2:09

musefan

15-Jul-09 2:09

You could try recommending a book, not the one that book stores want you to buy thou Big Grin | :-D

Life goes very fast. Tomorrow, today is already yesterday.

Luc Pattyn15-Jul-09 2:14

15-Jul-09 2:14

Nah. I only do that when a very basic question is getting asked; anyway, feel free to visit a decent book store, I could recommend the Stanford University Bookstore on the Palo Alto campus, it is quite impressive (I think it looks like an Amazon warehouse).

FYI: I added a book thread[^] on my personal CP blog for your convenience.

Smile | :)

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musefan15-Jul-09 2:22

musefan

15-Jul-09 2:22

That's a bit far for me, but thanks none the less. I went to a book store the other day and could not even find a computer section! I'll try a different one next time...

Some good advise in your thread Smile | :)

Life goes very fast. Tomorrow, today is already yesterday.

Luc Pattyn15-Jul-09 2:25

15-Jul-09 2:25

musefan wrote:
That's a bit far for me

Same here, but I do visit it on every opportunity, which is once in ten years or so.

Smile | :)

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musefan15-Jul-09 2:31

musefan

15-Jul-09 2:31

Well I shall keep it in mind if I am ever in the area Smile | :)

Life goes very fast. Tomorrow, today is already yesterday.

Tom Deketelaere15-Jul-09 2:32

Tom Deketelaere

15-Jul-09 2:32

Well for once I was first Poke tongue | ;-P

Christian Graus15-Jul-09 2:48

Christian Graus

15-Jul-09 2:48

I love when they post code that is a disaster, we try to help, and they never answer anyone who replies.

Christian Graus

Driven to the arms of OSX by Vista.

Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.

Tom Deketelaere15-Jul-09 2:53

Tom Deketelaere

15-Jul-09 2:53

Christian Graus wrote:
we try to help, and they never answer anyone who replies.

I know

I think in all the answers I gave to questions (which is compared to you almost nothing but hey I try Poke tongue | ;-P

) I might have gotten an answer back like twice or so.

Luc Pattyn15-Jul-09 2:53

15-Jul-09 2:53

Smart people walk away from disasters, for some reason we feel attracted to them?? Big Grin | :-D

Luc Pattyn [Forum Guidelines] [My Articles]

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Tom Deketelaere15-Jul-09 3:04

Tom Deketelaere

15-Jul-09 3:04

It's the same as seeing an accident on the road.

For some reason you can't resist to look.

Automatic Email Sender

dev sheoran15-Jul-09 1:41

dev sheoran

15-Jul-09 1:41

Hi All,

I have to develop an application using C#. Application requirements is given below:

1.Automatically send job alerts to all the registered job seekers based on some criteria like
work experience,Skills etc.
2.There are about 9 lac registered users and will increase in future.
3.Once the application started will send email to all the users and after completing the
email sending to all users it will stop/pause for some time say 3 hours and after that
it will automatically started . This process will keep on repeating until administrator
stop the application.
4.Application will run on the same server where database is running.

Please suggest me how to develop the application so that it consume minimum resources of the server?

Should I develop an application or a windows service? Which will be the best solution?

Please give suggestion keeping in mind that server resources should be consumed minimum?

Please Help.

Thanks & Regards,
Dev

Not Active15-Jul-09 2:25

Not Active

15-Jul-09 2:25

dev sheoran wrote:
windows service

Yes

only two letters away from being an asset

Manas Bhardwaj15-Jul-09 2:29

Manas Bhardwaj

15-Jul-09 2:29

Need to speed up my typing speed Smile | :)

Manas Bhardwaj
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Manas Bhardwaj15-Jul-09 2:38

Manas Bhardwaj

15-Jul-09 2:38

Mark Nischalke wrote:
dev sheoran wrote:
windows service

Yes

No, I wont do that.
I'll need to keep polling for checking when to start the next batch as he wants to do this every 3 hrs.

Manas Bhardwaj
Please remember to rate helpful or unhelpful answers, it lets us and people reading the forums know if our answers are any good.

Not Active15-Jul-09 2:45

Not Active

15-Jul-09 2:45

Manas Bhardwaj wrote:
I'll need to keep polling

Ever heard of a timer?

only two letters away from being an asset

dev sheoran15-Jul-09 2:43

dev sheoran

15-Jul-09 2:43

I am new to C# and never developed a windows service.Please give any reference to the windows service which send emails. It will be help full for me.

Thanks,
Dev

Christian Graus15-Jul-09 2:50

Christian Graus

15-Jul-09 2:50

You're asking for the source code to your project ? How about you buy some books, or use google, or even search this site for articles ?

Christian Graus

Driven to the arms of OSX by Vista.

Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.

Manas Bhardwaj15-Jul-09 2:29

Manas Bhardwaj

15-Jul-09 2:29

You could create a Console Application which can be scheduled to run after every 3 hours. Admin may disable the task if he wants.

You need to come up with a logic which will get the users to whom you want send the email. This will be a stored procedure returing you the user details and probably also the email content.

Manas Bhardwaj
Please remember to rate helpful or unhelpful answers, it lets us and people reading the forums know if our answers are any good.

Re: vbscript installation

dev sheoran15-Jul-09 18:39

dev sheoran

15-Jul-09 18:39

1)I don't want to run this application after every 3 hours. I want that application stop/pause for 3 hours after sending emails to all users and after that it starts automatically.
2) Its not necessary that it take same time to send emails to all users. Time to complete the process by the application may change as it depends on availability of system resources and on some others factors too.

Thanks,

vbscript installation

arkiboys15-Jul-09 0:28

arkiboys

15-Jul-09 0:28

Hi,
When trying to run a vb script on a machine, this is what it gives as error:
Can't find script engine \"VBScript\"
So to fix this I logged into the machine and did the following to install the vbscript engine:
in run window
regsvr32 vbscript
Message was that installation succeeded.
Then tried running the script on the machine again and still gives the same error as before.
Any thoughts please?
Thanks

Christian Graus15-Jul-09 0:44

Christian Graus

15-Jul-09 0:44

How is this a C# question ?

Christian Graus

Driven to the arms of OSX by Vista.

Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.

How to convert an image to a Base64 string and back?

Megidolaon15-Jul-09 0:06

Megidolaon

15-Jul-09 0:06

I want to store images in text form and later load them again.

I got this code to convert and image to a base64 string:

ImageConverter converter = new ImageConverter();
byte[] raw = new byte[1];
Bitmap test = new Bitmap(OFD_Open.FileName);

raw = (byte[])converter.ConvertTo(test, typeof(byte[]));

string output = Convert.ToBase64String(raw);
File.WriteAllText("image.txt", output);

And this code to convert it from a string back to an image

byte[] raw = new byte[1];
Bitmap pic = new Bitmap(1, 1);
raw = Convert.FromBase64String(OFD_Open.FileName);
PictureBox box = new PictureBox();

TypeConverter tc = TypeDescriptor.GetConverter(typeof(Bitmap));
pic = (Bitmap)tc.ConvertFrom(raw);

But the Convert.FromBase64String method throws an error, telling me there is an invalid character in the Base64 string.

What went wrong?
Thanks.

Re: How to convert an image to a Base64 string and back?

SeMartens15-Jul-09 0:21

SeMartens

15-Jul-09 0:21

Hi,

the Convert.FromBase64String expect a base64-encoded string, which is in your case stored within a file. But you pass the name of the file. You have to pass the content of the file!

It's not a bug, it's a feature!

Check out my CodeProject article Permission-by-aspect.

Me in Softwareland.

Re: How to convert an image to a Base64 string and back?

Super Lloyd15-Jul-09 0:27

Super Lloyd

15-Jul-09 0:27

Megidolaon wrote:
raw = Convert.FromBase64String(OFD_Open.FileName);

I think converting the filename won't help much...
If I were you I would convert the content!

From the top of my mind perhaps this will work:

Convert.FromBase64String(File.ReallAllText(OFD_Open.FileName));

A train station is where the train stops. A bus station is where the bus stops. On my desk, I have a work station....
_________________________________________________________
My programs never have bugs, they just develop random features.

Re: How to convert an image to a Base64 string and back?

Luc Pattyn15-Jul-09 2:08