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modified 3-Nov-19 11:15am.
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modified 3-Nov-19 11:14am.
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modified 3-Nov-19 11:14am.
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Message Removed
modified 3-Nov-19 11:14am.
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Hi!
Long time lurker here with a question.
I am thinkig of making a software that temporarily disables windows from auto-running a application when inserting a cd or usb. To do this, I need to edit a key in the registry, that is no hard to do.
What I want to know if this is enughe to stop malware from getting on my pc if I insert a usb-drive or cd, or if I am still risking getting a virus/malware on my pc.
If I understand it enughe, for a virus or other malicius software to infect my pc, dosen't it have to run some kind of script or app for it?
Would doing the above prevent that from happening or is it still dangerus to insert unknown usb drives into my pc, even with the auto run feature turned off?
Have a nice day
Acuena
modified 1-Nov-19 18:40pm.
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Disabling autoplay won't be enough to protect you from a malicious USB drive.
An attacker can manipulate the firmware[^] so that the drive pretends to be a keyboard or a network adapter. They can then send commands to your computer, or extract data, without having to run any software.
You can even purchase a "USB Killer" drive[^], which can completely destroy your hardware as soon as you plug it in.
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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Ow ya, did not think about the USB-killers and the modified firmware thing. That makes it much more harder to protect against bad USB with a software, it would make it impossible for the USB killer part.
Guess you could protect against the USB-Killer attack by having a external device you can use as a sacrifice thing between the PC and the USB, it must be able to handle the surge though.
Guess we have to stick to not allow it then unfortunately.
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To add to what Richard says, you get no real protection with a basic software solution: many computers are configured to allow "boot from USB" for recovery purposes, and even if disabling it in Windows works, if it has a bootable partition it stands a good chance of taking over the PC completely the next time it is turned on as that is part of the BIOS and before Windows even starts to load. The same problem exists with CD's (where fitted) - they can also be selected as a bootable device.
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
AntiTwitter: @DalekDave is now a follower!
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Yes, this is another problem I did not think off. Thanks for that 
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You're welcome!
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
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Hi
I'm new to C# and oop (though I have coded in Autoit for more that a decade, so I do have a basic understanding of coding) , I usually use google to get answers, but this question I haven't been able to find an answer to.
My problem/question.
I have created a simple form with 2 text boxes and a button. The form is in a class library, course I want to use it in several programs. In the same library I have another class file, that I want to handle all calls to my lib.
My problem is that I don't know how to "pop" the form, and how to use the button to get the input data from the text boxes, and then handle that data within my class file.
I want to use the library to handle the main programs license.
My idea is:
User launches the main program.
The program calls my license lib -> the lib checks if a license for the program exists in the database, if not "pop" the form to allow the user to enter User Name and License.
When the user clicks the form button, the lib calls a license server to check if the license is valid, if the lic is valid it writes it to the database, and shows a License is Valid message to the user.
Else if the license exist, continue the main program and drop the lic lib.
I hope that it clear what I try to achieve, and that some one can help point me in the right direction
Cheers
/LR
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Quote: The form is in a class library, course I want to use it in several programs.
Why not just keep the controls in the library and access the controls in the Windows Forms application? That would solve almost all of your problems.
Quote: I want to use the library to handle the main programs license.
Library cannot do anything on its own. Yes, you can contain the code for the logic in the library, but it would be your own application that triggers the functions and calls them to process something. Using a library, you will still need to process the output of the functions and then either continue the program, or terminate the process—as per licensing and other requirements.
There are a couple of articles on software licensing on CodeProject (search in top right corner), in case you want to see how to apply these features in a software application.
Quote: "pop" the form to allow the user to enter User Name and License.
Seems like a flow, why not execute the Windows Forms process itself, and "pop" it so user can input the details. This will be helpful, you can use Process class to start the process, and handle the output manually. If this program of yours is a Windows Forms app, then you can simply create the instance of the Form and show it.
Process Class (System.Diagnostics) | Microsoft Docs
To make things even interesting, you can add the Form elements to your console program, and show it dynamically on the runtime, see this thread for more, How to: Create a Windows Forms application from the command line | Microsoft Docs
Form Class (System.Windows.Forms) | Microsoft Docs
Quote: When the user clicks the form button
This would be managed inside the Windows Forms app, and your program will not do anything in this aspect—it will keep listening to the updates from licensing library.
Event driven programming in C# will help you in this case, Events - C# Programming Guide | Microsoft Docs
Based on the response of the library using the event, you can handle how to proceed with the last logic you have.
Once again, this is just pseudo-code, since you shared the pseudo-attempt with us. Start with the points I shared and get back to us, we will have more support by then.
The sh*t I complain about
It's like there ain't a cloud in the sky and it's raining out - Eminem
~! Firewall !~
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HI I am using this code to collect all data from datagrid and storing to list string.
this works perfectly except 1 problem. it only give me cell content to where the columns are visible. meaning if I have 200 rows and in my screen only shows 25 rows, what I can store to my string is only for 25rows. if I scroll, again it only give me values to the visible rows. anybody can give my a clue or give an advise why is this happening. or did I mis a for loop inside or foreach after declaring object[]?
var rows = GetDataGridRows(dataGrid);
List<string> s = new List<string>();
foreach (DataGridRow row in rows)
{
var column = dataGrid.Columns[0];
var tb = column.GetCellContent(row);
var r = (DataRowView)tb.DataContext;
Object[] obj = r.Row.ItemArray;
s.Add(obj[0].ToString());
ids = string.Join(",", s);
}
MessageBox.Show(ids);
modified 1-Nov-19 7:05am.
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That sounds like a problem with your GetDataGridRows function, which you haven't shown.
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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i used code to getrow.
public IEnumerable<datagridrow> GetDataGridRows(DataGrid grid)
{
var itemsSource = dataGrid.ItemsSource as IEnumerable;
if (null == itemsSource) yield return null;
foreach (var item in itemsSource)
{
var row = dataGrid.ItemContainerGenerator.ContainerFromItem(item) as DataGridRow;
if (null != row) yield return row;
}
}
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Looks like the DataGrid is virtualized, so ContainerFromItem returns null for any rows which aren't currently visible.
There are several workarounds suggested in this StackOverflow thread[^].
But as Dave said, it would be better to work with the source directly rather than trying to read the value from the DataGridRow.
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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Why are you getting the data from the DataGrid rows instead of the data source the grid is bound to?
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actually I extracted datas from DataTable. now I want to apply filtering to datagrid and from their I will get the values from current status of datagrid.
what I want is from current filter->get all cell content and store to 1 string with comma delimeter.
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you are right Dave. I dont need to go back and assess datagrid. instead use the data from rowfilter and use datarowview.
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Yes!
The DataGrid should be just for display of the data, not really a container for it.
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Hey, new to programming so be gentle. I am trying to compare two different SQL lists rows with each other using:
SqlCommand value = new SqlCommand("SELECT FROM INNER JOIN ON)
The problem is the FROM function - it will come from 2 different classes in a different common files (to the one I am writing code) and I am not sure i am calling these 2 (separate classes) from the common repository correctly?!
- The first SQL class is public int number1() with the row name name1.
- The second SQL class is public int number2() with the row name name2.
So the SELECT function will be SqlCommand value = new SqlCommand("FROM number1().name1, number2().name2)
So the FROM will go to the common repository and then search for class 1 get the row name one, and search class 2 (same repository) and search for name2? Obciously there is still SELECT INNER JOIN and ON functions but I just want to ensure that the FROM calling is done correctly thank you!!
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The JOIN syntax doesn't look like that:
SELECT a.columnName, b.ColumnName
FROM MyTable a
INNER JOIN MyOtherTable b
ON a.ID == b.MyTableID
I'm really not sure exactly what you are trying to do - your description doesn't make a lot of sense, and we have no access to your data or the relationships between your tables - so start here: SQL Joins[^] and if you can't work it out, give us sample data for your tables, and show what result you expect and why.
Remember that we can't see your screen, access your HDD, or read your mind - we only get exactly what you type to work with.
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
AntiTwitter: @DalekDave is now a follower!
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Thanks that's a good help. But when you are referring to tables I do not know what that would be since -
- I have two diffrent cs files, each file has 2 classes "public 1 ,
public 2). Within those to classes I now have the "myTable a"
and "myTable b". So I first have to refer to the cs. file, than
the class, than the "myTable b" or "myTable a" which im unsure how
to.
So the tables are not created in the same cs file thus when using
SELECT how do i tell c# to go to the class, than the
- When referring to table, you would refer to the SQL table that you
have created i.e. sql file name is "myTable a"?
Thanks for your patience!
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You don't use SQL for classes - SQL is for querying data direct from a DB: it's the source from which you get your data to populate your class instances! And the DB is external to your app, and often managed by a different app altogether: SQL server.
I think you need to sit back and rethink how you are managing data in this app - you don't seem to have quite worked out what gets stored where and how it gets loaded into what, when.
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
AntiTwitter: @DalekDave is now a follower!
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