-

Src/Asp.Net/SqlSugar/Abstract/AdoProvider/AdoProvider.cs

@@ -90,7 +90,14 @@ namespace SqlSugar
         {
             if (this.Connection.State != ConnectionState.Open)
             {
-                this.Connection.Open();
+                try
+                {
+                    this.Connection.Open();
+                }
+                catch (Exception ex)
+                {
+                    Check.Exception(true,ErrorMessage.ConnnectionOpen, ex.Message);
+                }
             }
         }
 

Src/Asp.Net/SqlSugar/ExpressionsToSql/Common/ErrorMessage.cs

@@ -29,5 +29,13 @@ namespace SqlSugar
                 return ErrorMessage.GetThrowMessage("Expression parsing does not support the current function {0}. There are many functions available in the SqlFunc class, for example, it=>SqlFunc.HasValue(it.Id)", "拉姆达解析不支持当前函数{0}，SqlFunc这个类里面有大量函数可用,也许有你想要的，例如： it=>SqlFunc.HasValue(it.Id)");
             }
         }
+
+        public static string ConnnectionOpen
+        {
+            get
+            {
+                return ErrorMessage.GetThrowMessage("Connection open error . {0}", " 连接字符串出错了，实在找不到原因请先Google错误.{0}.");
+            }
+        }
     }
 }