除常见特殊字符

MainForm/FaForm/Form_Home.cs

@@ -1944,8 +1944,11 @@ namespace MainForm
         /// <param name="format"></param>
         /// <returns></returns>
         private static string FormatStrbyPLC(string format) {
-            
-            string cleanedString = Regex.Replace(format, @"[\r\n\t]", "");
+            string cleanedString = "";
+            if (!string.IsNullOrEmpty(format))
+            {
+                cleanedString = Regex.Replace(format, @"[\r\n\t]", "");
+            }
             return cleanedString;
         }