Comments by HKHerron - CodeProject

HKHerron 4-Sep-17 15:10pm View

I Agree, I did state that this is not a secure approach.

However, I did mention using a Server-Side solution that would preform this function on the server instead, then reply back to the application if the keycode is valid or not.

I do have a couple of question for you though (Nothing to do with security)
How are you planning to maintain the database?
Are you going to add a new keycode every time you give out another copy?
What type of web-server are you running? Is it Public?

HKHerron 3-Sep-17 18:25pm View

OK, there are some things you need to change for it to work correctly.

For example, the namespace should match your application.

HKHerron 3-Sep-17 17:14pm View

There are several different ways you can handle the connection string.
Unfortunately, it is required to connect to any MySql database.

The text file was just a SIMPLE way to demonstrate.
I use the Text file version, because I use this in several applications and they connect to different servers. This way I can use the same code, and the only thing that changes is my DBConfig file. This is not considered Hard Coded, as it loads the information from the DBConfig file each time the application is ran. And yes, this is not very secure. However, to make the text file more secure, you could encrypt the text file. Then Decrypt in code to read the information.

You could also make it part of the Install application, hard code it in to the Initialize() method, then have it saved anywhere, and in any form. Once you application is complied, it is a lot harder to find the information.

One other way would be to create a Web App that does the MySql side of things, so that the connection string is actually on the web server and not in your code.

for example, write a web page:
http://www.mysite.com/CheckKeyCode?a1b2c3d4e5f6g7h8i9j10k11

Have it do the same work that in my code, then return a blank page with either the work true or false.

We then change my code to run an httprequest with the keycode entered, then read the response. Then perform actions based on the True or False reply.

One last thing, I forgot to mention, create a different user for the database to use other than your main account or the Admin account. Then only give the user rights to Query and Update.

HKHerron 10-Mar-16 16:02pm View

PHP with MySQL is what I would suggest. However, It appears you need to learn more about coding languages and what their abilities are. Also, you could down load an open source project, and study the code.

HKHerron 31-Dec-15 16:47pm View

You need to submit more code here for us to evaluate.
We can not solve your issue from what you have presented.

HKHerron 12-Aug-15 14:15pm View

Can you show us a sample of what the string "output" would be? Line breaks in a Command Line are different than that in a list box.

HKHerron 23-Jul-15 9:47am View

Please show us your code.

HKHerron 28-May-15 9:06am View

1st, Thank you Sascha for your explanations and examples.
This makes the most sense to me.

Not sure if this would matter, but I should explain that there may be (say) 6 different Device objects. But they all use Service1, Service2 and Service3.
The Device objects are found through a UPnP broadcast that returns a list containing the url to each devices description.xml file. Each Device object is then populated according to the information found in the description file. This is where the services are found for that device.

Since all my devices use the same services, maybe I should just consider NOT making the Services even part of the Device object at all, but stand alone classes.

Then I could use something like: Service2.executethis(Device, "VolumeUp");

HKHerron 28-May-15 8:54am View

Thank you Sergey Alexandrovich Kryukov for your explanation and response. +5
I am selecting Solution 2 as the accepted answer as it expands on your thoughts, while providing the best explanations, alternatives and options.

HKHerron 15-Apr-15 13:09pm View

Not sure, but don't you need to specify the size of the rectangle?
Like this:
RadioCheckField ckbx = new RadioCheckField(writer, new Rectangle(20, 20), fieldname, "Yes");

HKHerron 24-Mar-15 19:56pm View

Your issue is not in the error, but in Your code that caused it.

HKHerron 14-Mar-15 16:12pm View

Look in to using a VLC library here: http://www.videolan.org/vlc/index.html

HKHerron 14-Mar-15 16:09pm View

What are your 3rd party libraries compiled as? (x86, x64)

HKHerron 5-Mar-15 15:26pm View

Actually, it was more @OriginalGriff code.

HKHerron 5-Mar-15 15:03pm View

No, not mine, you used your code!

HKHerron 5-Mar-15 15:02pm View

Try looking at this: http://www.codeproject.com/Articles/54645/WPF-ListView-which-can-do-Sorting-Filtering-Totals

HKHerron 5-Mar-15 14:55pm View

Great, you should select it as your Solution!

HKHerron 5-Mar-15 14:47pm View

It works for me!

You need to change this line:

Console.WriteLine(" Order #(), Quantity ordered ()",orderNum, quantity);

to this:

Console.WriteLine(" Order #{0}, Quantity ordered {1}",orderNum, quantity);

HKHerron 5-Mar-15 14:10pm View

That's because your code still doesn't return any data beck to main. Look at solution 5, or Yes, you can do it like this, but it changes your classes to public!

using System;

public class DebugEight1
{
public static int orderNum = 0;
public static int quantity = 0;

public static void Main()
{
double total;
const double PRICE_EACH = 3.99;
DebugEight1.GetData();
total = quantity * PRICE_EACH;
Console.WriteLine(" Order #{0}, Quantity ordered = {1}", orderNum, quantity);
Console.WriteLine("Total is {0}", total.ToString("C"));
Console.WriteLine("=================================");
Console.WriteLine("Hit key to quit:");
Console.ReadKey();
}

public static void GetData()
{
String s1, s2;
Console.Write("Enter order number ");
s1 = Console.ReadLine();
Console.Write("Enter quantity ");
s2 = Console.ReadLine();
orderNum = Convert.ToInt32(s1);
quantity = Convert.ToInt32(s2);
}

Post your new code in a comment, or you can update your first post!

HKHerron 5-Mar-15 14:01pm View

Your code creates an error in the line: GetData(orderNum, quantity);
"Use of unassigned local variable" - This is what we were asking for!

This is because your variables: orderNum and quantity are null!

Change this line: int orderNum, quantity;

to this: int orderNum=0, quantity=0;

HKHerron 5-Mar-15 13:53pm View

OK, for starters, your code wont work because your GetData method does not return any information back to the Main method. Unless declared properly, variable declared in methods are not accessible to other methods. By using a class, you can pass this information between methods!

HKHerron 5-Mar-15 13:48pm View

This is your code. All I did was fix it!

HKHerron 5-Mar-15 10:31am View

As I mentioned, these are not my code, but some examples I found for you. This also seems to be a big issue for other users too. It's not really your code, but a bug when trying to integrate with your crystal report class. Crystal reports print from the "Default" printer by design of their software. Over-riding is possible but may not be the way you intend it to be.

I would start looking at Crystal Report forums, and ask you question there and see if any other users have found a solution to this. As I mentioned, it's not really a C# question, but more of a Crystal Reports question.

HKHerron 4-Mar-15 13:20pm View

Not sure what you mean by "I have tried to write System.Windows.Forms, its not coming."

In VS, under your project references, add a reference to System.Windows.Forms. It's not coming up because you do not have a reference to this library. Which is where access to the PrintDialog is located.

Also here is another example I found out there:

try
{

using (PrintDialog printDialog = new PrintDialog())
{
ReportPrintDocument rp = new ReportPrintDocument(rvPermit.ServerReport);

Form currentForm = new Form();
currentForm.Show();
currentForm.Activate();
currentForm.TopMost = true;
currentForm.Focus();
currentForm.Visible = false;

if (printDialog.ShowDialog(currentForm) == DialogResult.OK)
{
if (PrintReport != null)
PrintReport(this, e);

rp.PrinterSettings = printDialog.PrinterSettings;
rp.Print();
}

currentForm.Close();
}
}
catch (Exception)
{
// Prevent any error while calling the printer dialog
}

HKHerron 3-Mar-15 16:02pm View

Show us your code that attempts to open the connection!

HKHerron 3-Mar-15 14:24pm View

Huh???

OH.. OK like this:

string name;
if(name == "Structure")
{
Console.Writeline("Yep, sure is!");
}
else
{
Console.Writeline("Nope, not structure name!");
}

LOL :)

HKHerron 3-Mar-15 12:55pm View

Are the servers on your Local LAN, or internet?
Do you have any better idea of what the IP Addresses are?

Your starting at 100.100.0.0, but how many IP addresses do you need to go through to find the next one? or Do you know the IP Addresses of the server?

Since FTP servers use a particular Port, I would suggest possibly using a C# Port scanner on the IP address range and FTP port you are using (2222). You really don't even have to login or any thing, just see if it responds. Any response from one would mean that the server is ONLINE.

However, depending on the number of IP addresses it would need to go through, this could be a long process....

100.100.0.0 - 100.100.0.255 is a total of 256 IP address to search through.
100.100.0.0 - 100.100.255.255 is a total of 65,025 IP address to search through.

HKHerron 2-Mar-15 14:10pm View

Deleted

Take a look here: http://www.aspsnippets.com/Articles/Display-image-from-database-in-Image-control-without-using-Generic-Handler-in-ASPNet.aspx it looks like a good starting point.

HKHerron 2-Mar-15 14:06pm View

Why wouldn't you just use: public string cmb {get; set;}

HKHerron 1-Mar-15 18:43pm View

For starters, most prices and totals are not an INT. they are a Double. When you convert to INT, it will round the cents up. So 1.75 = 2 and 24.95 = 25.

HKHerron 1-Mar-15 12:09pm View

This will count spaces as a character!

HKHerron 1-Mar-15 10:18am View

Does your application use any 3rd party libraries or API's?
When you build the project, are there any warnings or errors reported?

HKHerron 28-Feb-15 20:35pm View

Your answer is the same as the console question that has already been answered.

HKHerron 28-Feb-15 14:01pm View

We just worked on this as a console app. You need to do your own homework!

HKHerron 28-Feb-15 13:58pm View

Is your question how to store data in a data base, or is it how to get the Longitude and Latitude from a MAP? I ask this because, storing the information in a database is just like any other data, as @Mehdi stated. If you are wondering what data type to use for it, I would suggest you just store is as a string. Then manipulate or covert as needed. Hope this helps you.

HKHerron 28-Feb-15 10:32am View

OH, WOW. 100-1000 is a large range.
Did you try stepping through it in debug to see if the file.filename is actually changing through each file found? You can also add a line with int x = Files.Count(); and see how many files are found.

HKHerron 27-Feb-15 21:05pm View

How many .jpg files are in c:\images?

HKHerron 27-Feb-15 16:33pm View

Devices that use the SOAP service usually have a Description file that will start you on your way to finding all the methods available. In many cases this file can be retrieved by going to the devices IP address and including the file name. For example: 192.168.1.100/description. However, some devices use a different name like DMR.XML. Try looking at this library to help you find UPnP services and methods: http://www.managedupnp.codeplex.com

HKHerron 26-Feb-15 15:22pm View

You really need to provide some more information here. Show us the code your trying to use.

HKHerron 25-Feb-15 16:16pm View

I think he is trying to prevent 2 people from editing the same record at the same time??

HKHerron 24-Feb-15 13:43pm View

I totally agree, but was not considering other data being entered as he is defensively not ready to handle validating input yet! LOL

HKHerron 24-Feb-15 13:35pm View

Wow, can't believe I overlook 2 stupid things.
It should be ReadLine() just in case they enter a 2 digit number. This is why you were asking what if they entered **50**. or even **11** for that matter.

I have updated my solution.

HKHerron 24-Feb-15 13:26pm View

Thanks for the catch on that @Andreas. My over-site...

This should work though:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Multiplication
{
class Program
{
static void Main(string[] args)
{
int number;
Console.Write("Please enter a number: ");
var x = Console.Read();
number = Convert.ToInt32(x);
MultiplicationTable(number);
}

private static void MultiplicationTable(int num)
{
int[] times = { 2, 3, 4, 5, 6, 7, 8, 9, 10 };
int answer;
foreach(int tnum in times)
{
answer = num * tnum;
Console.Write("The product of " + num + " x " + tnum + " = " + answer);
}
}
}
}

HKHerron 24-Feb-15 13:15pm View

What are you entering???

HKHerron 24-Feb-15 13:13pm View

tnum is each value in the array.
so during the loop, tnum will = 2 the first time, 3 the second time 4 the 3rd time and so on.

HKHerron 24-Feb-15 13:12pm View

Well, if you enter 50, then YES it going to do 50x2, 50x3, 50x4 and so on.
So the output should be:
100
150
200
250
300
350

However if you enter 2, it will be 2x2, 2x3,2x4,2x5 and will return
4
6
8
10
12

If you enter 1, then it will be 1x2, 1x3, 1x4 and will return
2
3
4
5.

Comments by HKHerron (Top 46 by date)