C# Discussion Boards - CodeProject

Spessotto11-Oct-13 2:45

11-Oct-13 2:45

Hello Guys!!

I have a panel, and i have a textbox that i can move to where i want. When i try to move outside the panel, in the top or the left of the panel, the control stops, it means, its locked to move for these directions... Buuuuut, for right or bottom, the mouse leaves the panel and the control remains invisible because its outside the panels borders..

What i want is a way to lock the left and bottom, to move the contro only inside the panel...

thanks in advance!

Rafael

Re: Moving Controls only inside the panel

BillWoodruff12-Oct-13 14:21

BillWoodruff

12-Oct-13 14:21

You need to set the Cursor's Clip Rectangle in the MouseDown EventHandler for the TextBox to that of its container's ClientRectangle translated to Screen coordinates, using an offset based on the Height and Width of the TextBox:

// Add to your MouseDown EventHandler

Cursor.Clip = YourTextBox.Parent.RectangleToScreen
(
    new Rectangle
    (
        e.X,
        e.Y,
        YourTextBox.Parent.ClientSize.Width - YourTextBox.Width,
        YourTextBox.Parent.ClientSize.Height - YourTextBox.Height
    )
);

And, in the MouseUp EventHandler for the TextBox:

// Add to your MouseUp EventHandler

Cursor.Clip = Rectangle.Empty;

If the Control that contains the TextBox is never resized at run-time, then, of course, you can store its ClientRectangle translated to Screen coordinates in advance. If the TextBox is always the same size, you can pre-calculate the offset Rectangle only once, and then, in the MouseDown EventHandler, just set the Location depending on the MouseDown's MouseEventArgs.Location.

This may not seem intuitive Smile | :)

Google CEO, Erich Schmidt: "I keep asking for a product called Serendipity. This product would have access to everything ever written or recorded, know everything the user ever worked on and saved to his or her personal hard drive, and know a whole lot about the user's tastes, friends and predilections." 2004, USA Today interview

modified 13-Oct-13 1:51am.

Re: Moving Controls only inside the panel

Spessotto14-Oct-13 1:18

Spessotto

14-Oct-13 1:18

You're the man Bill!!!! Works perfectly!!! Thanks you so much!!!!

GridView

Member 1032928610-Oct-13 23:45

Member 10329286

10-Oct-13 23:45

Can anyone tell me how to export dataGridView to Image(.jpg) format?

Re: GridView

harold aptroot11-Oct-13 1:03

harold aptroot

11-Oct-13 1:03

The same way as any other control: DrawToBitmap[^], then save the bitmap as jpg, though you should probably save it as png instead, text and other high-contrast-tiny-feature things get mangled pretty badly by jpg.

Re: GridView

Member 1032928611-Oct-13 22:50

Member 10329286

11-Oct-13 22:50

Thank you so much for your reply. It is working absolutely fine for me.

Now i want to take every 5 rows from data grid and capture it as a separate image. Can you please suggest me anything for this?

For ex. If grid contains 20 records then i want to take 4 images containing five records each.

Re: GridView

harold aptroot11-Oct-13 23:04

harold aptroot

11-Oct-13 23:04

I'm not sure what a good way to do that is. One slightly hacky way would be to make a new control (not on the form, but a temporary object), copy those 5 rows over, and then draw that. At least, I think that works.. I haven't tried it.

How to use PrintQueue.AddJob()?

aygrhnwms30410-Oct-13 16:05

aygrhnwms304

10-Oct-13 16:05

I want to tranfer a print job of printqueue A to printqueue B,try the PrintQueue.AddJob(), but fail, who know how to resolve it,Thank you.

Re: How to use PrintQueue.AddJob()?

Richard MacCutchan10-Oct-13 20:58

Richard MacCutchan

10-Oct-13 20:58

There are a number of variants of the AddJob method[^]. Which did you use and what exactly was the result?

Veni, vidi, abiit domum

Best way to store MASSIVE amounts of data?

SledgeHammer0110-Oct-13 15:37

SledgeHammer01

10-Oct-13 15:37

What is the best way to store *MASSIVE* amounts of data? I'm thinking [EDITED] millions or billions of images totalling 10TB or so. Not sure of the exact size yet... need to get some data samples... but somewhere in that arena.

I guess at a high level, they could be split by state.

I know that SQL can not handle this kind of size.

Performant lookup is also desired.

How is this usually handled?

Needs to be backupable of course as well.

Had an old boss who was a big fan of storing the path in the DB and the files on disk. From personal experience, you end up with so many directories, the file system breaks down. Try navigating to a folder with 1000+ directories.

I don't think I'll need to do too complex of queries on the data, just simple look ups. Inserts should be fast as well.

-- modified 10-Oct-13 23:06pm.

Re: Best way to store MASSIVE amounts of data?

Richard Andrew x6410-Oct-13 16:31

Richard Andrew x64

10-Oct-13 16:31

Never mind the DB you choose, how will you connect that many hard drives to one machine?! OMG | :OMG:

Have you looked at these guys MongoDB[^]?

The difficult we do right away...
...the impossible takes slightly longer.

modified 10-Oct-13 22:46pm.

Re: Best way to store MASSIVE amounts of data?

SledgeHammer0110-Oct-13 17:04

SledgeHammer01

10-Oct-13 17:04

Hmm... you're right haha... my estimates were a bit over the top. I did the math just now, and thats like 95,000 TB... lol...

I think 10TB - 100TB total data is more in the right area... oops Smile | :)

Re: Best way to store MASSIVE amounts of data?

Mycroft Holmes10-Oct-13 16:43

Mycroft Holmes

10-Oct-13 16:43

That sort of volume is going to required some serious iron. I would suggest you need to look at Oracle, I loathe Oracle but SQL server struggles with serious volume. We were looking at record volume about the same but data size substantially smaller and I think the 3 server cost topped $1m for the Oracle licences.

Then you are going to want to hire an Oracle consultant/DBA to design and tune the blasted thing.

Never underestimate the power of human stupidity
RAH

Re: Best way to store MASSIVE amounts of data?

SledgeHammer0110-Oct-13 17:04

SledgeHammer01

10-Oct-13 17:04

As I responded to the other guy, I got a little over zealous with my estimates... 10TB to 100TB is probably closer.

Re: Best way to store MASSIVE amounts of data?

Mycroft Holmes10-Oct-13 17:28

Mycroft Holmes

10-Oct-13 17:28

If the number of records is over 100m then you are going to struggle with SQL Server, even when you go down the path suggested by Garth - that is really your only option anyway. There is no way you want the images anywhere near your searchable data.

Never underestimate the power of human stupidity
RAH

Re: Best way to store MASSIVE amounts of data?

Garth J Lancaster10-Oct-13 17:09

Garth J Lancaster

10-Oct-13 17:09

ok, there's the images, and then there's the 'meta data', or think of the index fields telling you how to locate an image ..

So, to locate the correct image or pointer to image, you need the metadata - this is what you search on .. the question is, do you really need to store the images WITH the meta/index data ? I'd suggest 'not' .. so, you have a searchable DB of metadata/indexes on fast tier 1 storage, then, once the right record is round, you then retrieve the image from maybe a worm drive, or 'tier 2 storage' using the pointer/location from the search.

Plenty of storage providers provide WORM storage for example

Re: Best way to store MASSIVE amounts of data?

s_magus10-Oct-13 18:53

s_magus

10-Oct-13 18:53

Here is a relatively old article about the architecture of flicker, but it might give you some ideas.

http://highscalability.com/flickr-architecture[^]

Re: Best way to store MASSIVE amounts of data?

jschell11-Oct-13 9:28

jschell

11-Oct-13 9:28

SledgeHammer01 wrote:
Performant lookup is also desired.

You need actual requirements - not off the cuff statements.

For example you could take the above statement and claim that the the system must be capable of serving all of that data at the very same time. If so then the company is going to need to buy an IP backbone company just to deliver it.

The reality is that system has business cases that dictate usage. You need to start with those.

SledgeHammer01 wrote:
Needs to be backupable of course as well.

Think about that in terms of the above requirements. How long is it going to take to restore the entire system from scratch? Obviously too long some something has to be different.

SledgeHammer01 wrote:
I guess at a high level, they could be split by state.

You start with requirements, business cases and usage patterns and then define categorizations. Categorizations will impact how it is stored.

One final suggestion - if that estimate is a pie in the sky dream then go do your own research. If it is a hard business requirement then the business needs to pay for consultants (very likely plural) with experience in very large data systems rather than trying to roll their own.

Re: Best way to store MASSIVE amounts of data?

Ennis Ray Lynch, Jr.11-Oct-13 9:45

Ennis Ray Lynch, Jr.

11-Oct-13 9:45

SQL is a language.

I have a few hundred gigs that I generate google map tile images on the fly so it can work. Appropriate indexing and caching is the real key.

How it is usually handled? Testing, scaling, testing, and measuring.

Are you on an intranet exlusively? Inexpensive servers with 4 port NICS serve as really nice in-house CDN's and scale fairly well. Not on an intranet? Well there are public CDN which will host the images then it is merely about hosting the indexes.

Need custom software developed? I do custom programming based primarily on MS tools with an emphasis on C# development and consulting.

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

"All users always want Excel" --Ennis Lynch

C# Code generation .net 4.5

no_time10-Oct-13 9:08

no_time

10-Oct-13 9:08

SQL

Hi,
do you know any c# code generation framework (.net 4.5)?
Any resources / best practices for that topic?

Re: C# Code generation .net 4.5

Richard Andrew x6410-Oct-13 9:50

Richard Andrew x64

10-Oct-13 9:50

Here is a code generation framework: CodeWorker[^]

The difficult we do right away...
...the impossible takes slightly longer.

Re: C# Code generation .net 4.5

Homero Rivera10-Oct-13 12:53

Homero Rivera

10-Oct-13 12:53

The truth is you can compile C# programs on CommandPrompt (aka DOS).
And with .NET Framework you can create text files with any extension including cs (for C#).
And also with .NET Framework you can issue CommandPrompt commands.

So, in theory you can make a C# program that creates c# programs and also that runs them.

Re: C# Code generation .net 4.5

Keld Ølykke10-Oct-13 22:04

Keld Ølykke

10-Oct-13 22:04

Hi,

If you are in visual studio and want to get your hands dirty, you can take a look at

A built-in system for code generation:
http://msdn.microsoft.com/en-us/library/vstudio/bb126445.aspx[^]

The built-in system for addins (you can write your own addin that can write/edit/delete files in an open solution):
Visual Studio Add Ins - In Depth[^]

Kind Regards,

Keld Ølykke

how to restrict a method call only once

srinimuk9-Oct-13 22:32

srinimuk

9-Oct-13 22:32

Hi Team, i have a master page in my .net application and from master page i call a helper file (.cs)and my requirement is i would like to execute one method(returns a string value) in that helper file, my application connects to master page each time upon loading of different pages i would like to keep the first method call value and persist the value between different page calls
i am unable to user httpcontext.session object as it gives me null values always ,

can some one suggest me the best way to preserve the method call value between round trips.

Re: how to restrict a method call only once

Richard MacCutchan9-Oct-13 22:53

Richard MacCutchan

9-Oct-13 22:53

Is this something to do with ASP.NET? If so, I would suggest you post it at http://www.codeproject.com/Forums/12076/ASP-NET.aspx[^].

Veni, vidi, abiit domum

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