diff --git a/类库/Api.Framework/ApiClient.cs b/类库/Api.Framework/ApiClient.cs
index 63e1a86..075289b 100644
--- a/类库/Api.Framework/ApiClient.cs
+++ b/类库/Api.Framework/ApiClient.cs
@@ -64,6 +64,11 @@ namespace Api.Framework
         /// <returns></returns>
         public static string GetValidItemId(string numIid)
         {
+            if (numIid == null)
+            {
+                return string.Empty;
+            }
+
             if (numIid.Contains("-"))
             {
                 var split = numIid.Split(new string[] { "-" }, StringSplitOptions.RemoveEmptyEntries);