解决同时向数据库插入时冲突的问题

DownKyi.Core/Storage/Database/CoverDb.cs

@@ -1,4 +1,6 @@
-using System.Collections.Generic;
+using DownKyi.Core.Logging;
+using System;
+using System.Collections.Generic;
 
 namespace DownKyi.Core.Storage.Database
 {
@@ -25,20 +27,37 @@ namespace DownKyi.Core.Storage.Database
         /// </summary>
         /// <param name="cover"></param>
         public void Insert(Cover cover)
+        {
+            try
             {
                 string sql = $"insert into cover values ({cover.Avid}, '{cover.Bvid}', {cover.Cid}, '{cover.Url}', '{cover.Md5}')";
                 dbHelper.ExecuteNonQuery(sql);
             }
+            catch (Exception e)
+            {
+                Utils.Debugging.Console.PrintLine("Insert()发生异常: {0}", e);
+                LogManager.Error("CoverDb", e);
+            }
+        }
 
         /// <summary>
         /// 更新数据，以url检索
         /// </summary>
         /// <param name="cover"></param>
         public void Update(Cover cover)
+        {
+            try
             {
                 string sql = $"update cover set avid={cover.Avid}, bvid='{cover.Bvid}', cid={cover.Cid}, md5='{cover.Md5}' where url glob '{cover.Url}'";
                 dbHelper.ExecuteNonQuery(sql);
             }
+            catch (Exception e)
+            {
+                Utils.Debugging.Console.PrintLine("Update()发生异常: {0}", e);
+                LogManager.Error("CoverDb", e);
+            }
+           
+        }
 
         /// <summary>
         /// 查询所有数据

DownKyi.Core/Storage/Database/HeaderDb.cs

@@ -1,4 +1,6 @@
-using System.Collections.Generic;
+using DownKyi.Core.Logging;
+using System;
+using System.Collections.Generic;
 
 namespace DownKyi.Core.Storage.Database
 {
@@ -25,20 +27,36 @@ namespace DownKyi.Core.Storage.Database
         /// </summary>
         /// <param name="header"></param>
         public void Insert(Header header)
+        {
+            try
             {
                 string sql = $"insert into header values ({header.Mid}, '{header.Name}', '{header.Url}', '{header.Md5}')";
                 dbHelper.ExecuteNonQuery(sql);
             }
+            catch (Exception e)
+            {
+                Utils.Debugging.Console.PrintLine("Insert()发生异常: {0}", e);
+                LogManager.Error("HeaderDb", e);
+            }
+        }
 
         /// <summary>
         /// 更新数据
         /// </summary>
         /// <param name="header"></param>
         public void Update(Header header)
+        {
+            try
             {
                 string sql = $"update header set name='{header.Name}', url='{header.Url}', md5='{header.Md5}' where mid={header.Mid}";
                 dbHelper.ExecuteNonQuery(sql);
             }
+            catch (Exception e)
+            {
+                Utils.Debugging.Console.PrintLine("Update()发生异常: {0}", e);
+                LogManager.Error("HeaderDb", e);
+            }
+        }
 
         /// <summary>
         /// 查询所有数据
@@ -89,7 +107,7 @@ namespace DownKyi.Core.Storage.Database
                         Mid = (long)reader["mid"],
                         Name = (string)reader["name"],
                         Url = (string)reader["url"],
-                        Md5=(string)reader["md5"]
+                        Md5 = (string)reader["md5"]
                     };
                     headers.Add(header);
                 }

DownKyi.Core/Storage/StorageCover.cs

@@ -161,7 +161,14 @@ namespace DownKyi.Core.Storage
 
                     if (File.Exists(localFile))
                     {
-                        File.Move(localFile, $"{StorageManager.GetCover()}/{md5}");
+                        string destFile = $"{StorageManager.GetCover()}/{md5}";
+
+                        // 如果不存在
+                        if (!File.Exists(destFile))
+                        {
+                            // 移动到指定位置
+                            File.Move(localFile, destFile);
+                        }
 
                         return md5;
                     }