Events in C# sending string to other functions

So I have a C# program that take the user input and sends it out to another function.
The problem I'm having is that it only works the first time I click on button1, then I have to re-run the program so I can send out anything else.

I'm not sure what's the problem here.

Code:

---



        public Form1()
        {
            int i;
            InitializeComponent();
            InitComPort1();
            readDevice();
            i = ReadDevice();
            textBox3.Text = ReadString(2);

            }

private void button1_Click_1(object sender, EventArgs e)
        {
            int i;
            string DS = "DS";
            string DS_Rev = textBox2.Text;
            string DS_SN = textBox1.Text;
            string DS_Type = comboBox1.Text;
            string DS_Pdate = DateTime.Now.ToString("MMyy");
            i = ProgramDevice(3, DS + DS_SN + DS_Type, DS_Pdate + DS_Rev);
            if (i == 1)
            {
                MessageBox.Show(DS + DS_SN + DS_Type + DS_Pdate + DS_Rev + " Programmed Succesfully", "Programmer Result");
            }

---

My guess is that it's getting hung up in ProgramDevice() the second time you click the button. You can try throwing up another MessageBox right before the call to ProgramDevice() to see if it's getting there.

Put a breakpoint right before ProgramDevice is called. Once it hits the breakpoint step into ProgramDevice and see if it ever returns.

Incidentally you can enable line numbers in MSVS which helps when debugging. I find that without line numbers being shown it is difficult to tell at a glance where my breakpoints are.