Re: encryption - C# Discussion Boards

2-Nov-09 8:31

Hi all,
I just need to know how do encrypt one column in my datagridview out of many.
I do not want to show that column value to user because it contain password.

thanks in advance

Christian Graus2-Nov-09 9:02

Christian Graus

2-Nov-09 9:02

you don't want to show it encrypted, just don't show it at all, either by writing your own column definitions, or by not requesting it from the data source.

You don't encrypt passwords in your data source ?

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.

jashimu2-Nov-09 9:11

2-Nov-09 9:11

Hi Christian, I understand what you are saying. I am not encrypting the database rather
when it display on the datagridview I don't want the admin to see other password but he/she
should be able to change it without knowing what it was.it can be as MasktextBox like " *******".

thanks

netJP12L2-Nov-09 10:19

netJP12L

2-Nov-09 10:19

You should have a function that encrypt a user password. There are many password encryption algorithm. However you take that encrypted password string and stored in the database. This way anyone who would have access to the database or if somehow manged to the password all the would see is a long encrypted string.
If you want to update the password field then just update the password field with the new encrypted password and you are all set.

jashimu2-Nov-09 10:41

2-Nov-09 10:41

hi netJP12L, I see what you are saying. I am trying to do the same but having some deficulties.

thanks for your help.

Dave Kreskowiak2-Nov-09 10:42

Dave Kreskowiak

2-Nov-09 10:42

You really do not want to change passwords in a DataGridView environment. Since you shouldn't be showing what the new password is, you need to have the user type the passwrod twice to confirm it was typed correctly. You don't have that option in a DGV unless you write a custom editor for that field (NOT easy!). A better method would be to open a seperate form for that record and asking for the new password twice.

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Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008
But no longer in 2009...

jashimu2-Nov-09 10:45

2-Nov-09 10:45

Hi Dave, thaks for saving my time. I was trying for long time. Could not make it work.

I will try different way.

Last Attacker3-Nov-09 3:14

Last Attacker

3-Nov-09 3:14

What you could do (don't ask me how, I just know that we are using it in our project) is, if you're using SQL 2005, encrypt the column which contains your passwords, generate the proper cert for that encryption to happen.
Then create an Updatable View which will only allow certain SQL users to see the actual values and when other users do a select on that view, it will appear as NULL to them. Also, if you have access, you can change the password values through the Updatable View (you'll have to since the column is not a string column anymore but a binary one).
You'll have to find out how to do it but it is definitely possible as we are using it.

- Last Attacker

jashimu3-Nov-09 4:39

load image with open file?

3-Nov-09 4:39

Hi Atacker,

thanks for your suggestion. I did something it will not show to any user but user ( who has access to ) will be able to change modify it.

thanks

Arefeh Haghpnah2-Nov-09 8:12

Re: load image with open file?

2-Nov-09 8:12

created a program which has a "Load Picture" button, and a Picture Box .Whenever I click a "Load Picture" button, it will show a Open File Dialog then selected file will load to a picture box.

My question is How I can make the picture loads to my Picture Box when User right click on a image file ---> Open With --> browse for my program.

Like Photoshop, you know, when you rigt click a image file ---> Open With ---> Photoshop --> then Photoshop will open with that image file.

Thanks !

Christian Graus2-Nov-09 9:01

Christian Graus

2-Nov-09 9:01

Looks like you answered half your question. For the other half, you need to associate your program with the file extension in the shell, and you need to accept a program path as a command argument when your program launches.

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.

Message Closed

2-Nov-09 9:03

stancrm

2-Nov-09 9:03

Message Closed

modified 23-Nov-14 7:23am.

Re: load image with open file?

Arefeh Haghpnah3-Nov-09 7:52

3-Nov-09 7:52

Thank you. you are very good

load picture

Arefeh Haghpnah2-Nov-09 7:59

2-Nov-09 7:59

Hi every body.
I Have A Question a bout load picture in ASP.NET With c#.
How can I load picture?
And How can I laod images with open command dialog(cadre Open)?
Plaese help me.
thank you Cry | :((

kryzchek2-Nov-09 9:13

kryzchek

2-Nov-09 9:13

You mention ASP.NET, so do you really want the user to upload an image from their machine to your server?

Arefeh Haghpnah3-Nov-09 7:56

3-Nov-09 7:56

hello.
no . i want open picture with dialog open.please tell me who i can load picture with open dialog?
i am beginner .

kryzchek3-Nov-09 7:57

kryzchek

3-Nov-09 7:57

The OpenFileDialog is for Windows Forms, not ASP.NET. You need to allow the user to upload a file from their computer to your server. Your server cannot read files on a client's machine.