diff --git a/Backup2Cloud/Conf/SingleConfiguration.cs b/Backup2Cloud/Conf/SingleConfiguration.cs
index 6f88d62..a7d6c11 100644
--- a/Backup2Cloud/Conf/SingleConfiguration.cs
+++ b/Backup2Cloud/Conf/SingleConfiguration.cs
@@ -25,7 +25,8 @@ public struct SingleConfiguration : IConfigurable
         public HashSet<string> crontab;
 
         /// <summary>
-        /// 数据源
+        /// 数据源。
+        /// 用来将数据保存到path。
         /// </summary>
         public IDataSource dataSource;
 
diff --git a/Backup2Cloud/DataSource/CustomDataSource.cs b/Backup2Cloud/DataSource/CustomDataSource.cs
index 16911c6..793b202 100644
--- a/Backup2Cloud/DataSource/CustomDataSource.cs
+++ b/Backup2Cloud/DataSource/CustomDataSource.cs
@@ -34,7 +34,7 @@ public virtual string Tips
             get
             {
                 return "command：自定义命令；" +
-                    "params：自定义命令参数，可以为空。";
+                    "params：自定义命令参数，可以为空。如果包含\"{0}\"(没有空格)，将用配置文件的path替代。";
             }
         }
 
@@ -55,11 +55,11 @@ public virtual object GetExample()
         /// 运行自定义命令。
         /// </summary>
         /// <exception cref="OperationCanceledException"/>
-        public void SaveData()
+        public void SaveData(string des)
         {
             Process process = string.IsNullOrWhiteSpace(Params) ?
                                     Process.Start(Command) :
-                                    Process.Start(Command, Params);
+                                    Process.Start(Command, Params.Contains("{0}") ? string.Format(Params, des) : Params);
 #if DEBUG
             process.OutputDataReceived += (sender, e) => Log.Info(e.Data);
             process.BeginOutputReadLine();
diff --git a/Backup2Cloud/DataSource/IDataSource.cs b/Backup2Cloud/DataSource/IDataSource.cs
index 36ba57f..2b36060 100644
--- a/Backup2Cloud/DataSource/IDataSource.cs
+++ b/Backup2Cloud/DataSource/IDataSource.cs
@@ -10,6 +10,7 @@ public interface IDataSource : IConfigurable, IExampled
         /// <summary>
         /// 保存数据。
         /// </summary>
-        void SaveData();
+        /// <param name="des">保存的路径</param>
+        void SaveData(string des);
     }
 }
diff --git a/Backup2Cloud/Worker/BackupWorker.cs b/Backup2Cloud/Worker/BackupWorker.cs
index e57f952..ed2c4d8 100644
--- a/Backup2Cloud/Worker/BackupWorker.cs
+++ b/Backup2Cloud/Worker/BackupWorker.cs
@@ -29,8 +29,11 @@ public async Task Execute(IJobExecutionContext context)
                     DateTime start = DateTime.Now;
                     Log.Info(string.Format("开始执行任务\"{0}\"。", conf.name), conf.name);
 
-                    conf.dataSource.SaveData();
-                    Log.Info("成功为数据源执行保存命令。", conf.name);
+                    if (conf.dataSource != null)
+                    {
+                        conf.dataSource.SaveData(conf.path);
+                        Log.Info("成功为数据源执行保存命令。", conf.name);
+                    }
 
                     string suffix = start.ToString("yyyyMMddHHmmss") + ".zip";
                     file = Compress(conf.path);
@@ -39,7 +42,7 @@ public async Task Execute(IJobExecutionContext context)
                     Log.Info("成功上传文件。", conf.name);
 
                     DateTime end = DateTime.Now;
-                    Log.Info(string.Format("任务\"{0}\"执行成功，用时{1}秒。", conf.name, (end - start).TotalSeconds), conf.name);
+                    Log.Info($"任务\"{ conf.name }\"执行成功，用时{ (end - start).TotalSeconds }秒。",  conf.name);
                 }
                 catch (Exception e)
                 {
@@ -108,7 +111,7 @@ private string Compress(string path)
             else
             {
                 // 都不是
-                throw new FileNotFoundException(string.Format("没有找到文件或目录\"{0}\"。", path));
+                throw new FileNotFoundException($"没有找到文件或目录\"{ path }\"。");
             }
 
             return zip;