fix: catch not connect to network exception

STranslate/Utils/HttpUtil.cs

@@ -61,11 +61,18 @@ namespace STranslate.Utils
         {
             using (var client = new HttpClient())
             {
-                var respContent = await client.GetAsync(urlpath);
+                try
+                {
+                    var respContent = await client.GetAsync(urlpath);
 
-                string respStr = await respContent.Content.ReadAsStringAsync();
+                    string respStr = await respContent.Content.ReadAsStringAsync();
 
-                return respStr;
+                    return respStr;
+                }
+                catch (Exception ex)
+                {
+                    throw ex;
+                }
             }
         }
     }

STranslate/Utils/TranslateUtil.cs

@@ -61,16 +61,18 @@ namespace STranslate.Utils
         /// <returns></returns>
         public static async Task<string> TranslateBaiduAsync(string appID, string secretKey, string text, LanguageEnum target, LanguageEnum source = LanguageEnum.AUTO)
         {
-            Random rd = new Random();
-            string salt = rd.Next(100000).ToString();
-            string sign = EncryptString(appID + text + salt + secretKey);
-            string url = "http://api.fanyi.baidu.com/api/trans/vip/translate?";
-            url += "q=" + HttpUtility.UrlEncode(text);
-            url += "&from=" + source.ToString().ToLower();
-            url += "&to=" + target.ToString().ToLower();
-            url += "&appid=" + appID;
-            url += "&salt=" + salt;
-            url += "&sign=" + sign;
+            try
+            {
+                Random rd = new Random();
+                string salt = rd.Next(100000).ToString();
+                string sign = EncryptString(appID + text + salt + secretKey);
+                string url = "http://api.fanyi.baidu.com/api/trans/vip/translate?";
+                url += "q=" + HttpUtility.UrlEncode(text);
+                url += "&from=" + source.ToString().ToLower();
+                url += "&to=" + target.ToString().ToLower();
+                url += "&appid=" + appID;
+                url += "&salt=" + salt;
+                url += "&sign=" + sign;
 #if false
             HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
             request.Method = "GET";
@@ -84,14 +86,19 @@ namespace STranslate.Utils
             myStreamReader.Close();
             myResponseStream.Close();
 #endif
-            
-            var retString = await HttpUtil.GetAsync(url);
-            var resp = JsonConvert.DeserializeObject<BaiduResp>(retString);
-            if (resp.From != null)
+
+                var retString = await HttpUtil.GetAsync(url);
+                var resp = JsonConvert.DeserializeObject<BaiduResp>(retString);
+                if (resp.From != null)
+                {
+                    return resp.TransResult[0]?.Dst;
+                }
+                return string.Empty;
+            }
+            catch (Exception ex)
             {
-                return resp.TransResult[0]?.Dst;
+                throw ex;
             }
-            return string.Empty;
         }
         // 计算MD5值
         public static string EncryptString(string str)

STranslate/ViewModel/MainVM.cs

@@ -19,31 +19,31 @@ namespace STranslate.ViewModel
         private string Text;
         public MainVM()
         {
-            try
-            {
-                //初始化界面参数
-                InputCombo = LanguageEnumDict.Keys.ToList();
-                InputComboSelected = LanguageEnum.AUTO.GetDescription();
-                OutputCombo = LanguageEnumDict.Keys.ToList();
-                OutputComboSelected = LanguageEnum.EN.GetDescription();
+            //初始化界面参数
+            InputCombo = LanguageEnumDict.Keys.ToList();
+            InputComboSelected = LanguageEnum.AUTO.GetDescription();
+            OutputCombo = LanguageEnumDict.Keys.ToList();
+            OutputComboSelected = LanguageEnum.EN.GetDescription();
 
-                config = ConfigUtil.ReadConfig(ConfigPath);
+            config = ConfigUtil.ReadConfig(ConfigPath);
 
-                //手动复制翻译结果
-                CopyTranslateResultCmd = new RelayCommand((_) =>
-                {
-                    return string.IsNullOrEmpty(OutputTxt) ? false : true;
-                }, (_) =>
-                {
-                    System.Diagnostics.Debug.Print("手动复制翻译结果: " + OutputTxt);
-                    Clipboard.SetText(OutputTxt);
-                });
+            //手动复制翻译结果
+            CopyTranslateResultCmd = new RelayCommand((_) =>
+            {
+                return string.IsNullOrEmpty(OutputTxt) ? false : true;
+            }, (_) =>
+            {
+                System.Diagnostics.Debug.Print("手动复制翻译结果: " + OutputTxt);
+                Clipboard.SetText(OutputTxt);
+            });
 
 
-                TranslateCmd = new RelayCommand((_) =>
-                {
-                    return string.IsNullOrEmpty(InputTxt) ? false : true;
-                }, async (_) =>
+            TranslateCmd = new RelayCommand((_) =>
+            {
+                return string.IsNullOrEmpty(InputTxt) ? false : true;
+            }, async (_) =>
+            {
+                try
                 {
                     Text = InputTxt;
 
@@ -63,14 +63,12 @@ namespace STranslate.ViewModel
                         return;
                     }
                     OutputTxt = translateResp;
-                    Clipboard.SetText(OutputTxt);
-                });
-
-            }
-            catch (Exception ex)
-            {
-                OutputTxt = ex.Message;
-            }
+                }
+                catch (Exception ex)
+                {
+                    OutputTxt = ex.Message;
+                }
+            });
         }
 
         public ICommand TranslateCmd { get; private set; }