Passing data from C# to ComPort2 (USb to RS232)

Question

I have a card dispensing device in which I want to be triggered by a C# program.

 

The Card Dispensing Device has a command to trigger the card-out function.

 

 

 

Now when I checked the 42 is a hex and the H is just a hex determinator of some sort.

 

They gave me an exe which do the sending of data but I want to repliacte it and create my own.

 

In the exe that they gave when I press card out it shows a command like this one

 

-->[0x01] [0x42]

 

the first [] is for the device the second [] is the I think ascii hex of the command.

 

Here's the code I have so far

using System.IO.Ports;
namespace Card_Reader
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
using (SerialPort port = new SerialPort("COM2", 9600, Parity.None, 8))
{
byte[] bytesToSend = new byte[1] { 0x2A };
port.Open();
port.Write(bytesToSend, 0, 1);
}
}

I did not include all closing brackets.

Answer 1

.NET:   
   string userString = textBox1.Text;
   string replacedString = userString.Replace("'", "''");
 
SQL:
   replacedString = Replace(userString,"'","''")
 
Hope this helps.

Answer 2

Hi Giorgio,
    Whenever you have single quotes, replace them with 2 single quotes. That should work.

Answer 3

Nainil:
 
Yes, thank you.

Answer 4

Nainil:
 
Can you give me a sample code of the 2 types?
 

Answer 5

Giorgio,
   You can either use .NET string.Replace() method to replace any single quotes with 2 single qoutes or you can use T-SQL's Replace function. Since the value being inserted is passed in as a SqlParameter.Value property, you can run the Replace function through it and ensure that any string being passed to the stored procedure is clean. Hope this helps.

Answer 6

Nainil:
 
Yes, if it was a string. But it will be some text that the user entered. Is there a way to do it automatically when I put it into the sql command to save it?