연결할 Serial 없을 때 예외 문법 추가 / ComboBox에 연결할 Serial Port 없을 때 예외 문장 추가

Basic_Terminal/Func/Serial.cs

@@ -31,13 +31,17 @@ namespace Basic_Terminal
             }
             cb_port.EndUpdate();
             //SerialPort 초기 설정.
-            serialPort.Encoding = Encoding.GetEncoding("Windows-1252");
+         //  serialPort.Encoding = Encoding.GetEncoding("Windows-1252");
             cb_port.DataSource =  SerialPort.GetPortNames();
-            serialPort.PortName = Serial_Name = cb_port.SelectedItem.ToString();
-            serialPort.BaudRate = (int)115200;
-            serialPort.DataBits = (int)8;
-            serialPort.Parity = System.IO.Ports.Parity.None;
-            serialPort.StopBits = StopBits.One;
+            try
+            {
+                serialPort.PortName = Serial_Name = cb_port.SelectedItem.ToString();
+                serialPort.BaudRate = (int)115200;
+                serialPort.DataBits = (int)8;
+                serialPort.Parity = System.IO.Ports.Parity.None;
+                serialPort.StopBits = StopBits.One;
+            }
+            catch { }
 
         }
         private delegate void StringSend(string Text);
@@ -109,7 +113,7 @@ namespace Basic_Terminal
             System.GC.Collect(0, GCCollectionMode.Forced);
             System.GC.WaitForFullGCComplete();
         }
-        public Boolean Serial_PortOpen(ref Button Btn_Portonoff)
+        public Boolean Serial_PortOpen(ref Button Btn_Portonoff,ref ComboBox cb)
         {
             Boolean ret = false;
             try
@@ -121,8 +125,16 @@ namespace Basic_Terminal
                 }
                 else//When the port is close
                 {
-                    serialPort.Open();
-                    Btn_Portonoff.Text = "Port Close";
+                    if (cb.Text != "")
+                    {
+                        serialPort.Open();
+                        Btn_Portonoff.Text = "Port Close";
+                    }
+                    else
+                    {
+                        MessageBox.Show("Port is not set");
+                        ret = true;
+                    }
                 }
             }
             catch

Basic_Terminal/Wnd/Main_Form.cs

@@ -45,7 +45,7 @@ namespace Basic_Terminal
 
         private void Button_PortOpen_Click(object sender, EventArgs e)
         {
-            Serial_connectiondisable(serial.Serial_PortOpen(ref button_PortOpen));
+            Serial_connectiondisable(serial.Serial_PortOpen(ref button_PortOpen,ref comboBox_Port));
         }
 
         private void ComboBox_Port_SelectedIndexChanged(object sender, EventArgs e)