diff --git a/Projects/WebClient/Web.Operation/Components/Pages/CPMeta.razor b/Projects/WebClient/Web.Operation/Components/Pages/CPMeta.razor
index 98823c1..9fec4a5 100644
--- a/Projects/WebClient/Web.Operation/Components/Pages/CPMeta.razor
+++ b/Projects/WebClient/Web.Operation/Components/Pages/CPMeta.razor
@@ -71,6 +71,11 @@
                 response = await _cpMetaService.GetWbmsMetaByProductID(SearchProductID, ServerAddress, outValue);
         }
 
+        if(response == null)
+        {
+            response = new Response_GetWbmsMeta();
+        }
+
         await Task.Delay(300);
         PopupService.CloseIndicator();
     }
@@ -85,6 +90,11 @@
                 response = await _cpMetaService.GetWbmsMetaByMacAddress(SearchProductMacAddress, ServerAddress, outValue);
         }       
 
+        if (response == null)
+        {
+            response = new Response_GetWbmsMeta();
+        }
+
         await Task.Delay(300);
         PopupService.CloseIndicator();
     }
diff --git a/Projects/WebClient/Web.Operation/Module/OperationGrid.razor b/Projects/WebClient/Web.Operation/Module/OperationGrid.razor
index 110c709..fedacac 100644
--- a/Projects/WebClient/Web.Operation/Module/OperationGrid.razor
+++ b/Projects/WebClient/Web.Operation/Module/OperationGrid.razor
@@ -6,9 +6,9 @@
 <RadzenDataGrid class="rz-shadow-1" TItem="TDataModel" Data="@DataList" GridLines="DataGridGridLines.Both"
                 AllowFiltering FilterMode="FilterMode.Simple" AllowColumnResize
                 SelectionMode="DataGridSelectionMode.Single" Density="@Density.Default">
-    <Columns>
+    <Columns>        
         @foreach (var col in typeof(TDataModel).GetProperties())
-        {            
+        {
             <RadzenDataGridColumn Property="@col.Name" Title="@col.Name">
                 <Template>
                     <span>
@@ -16,11 +16,11 @@
                     </span>
                 </Template>
             </RadzenDataGridColumn>
-        }
+        }          
     </Columns>
 </RadzenDataGrid>
 
 @code {
     [Parameter]
-    public IEnumerable<TDataModel> DataList { get; set; }
+    public IEnumerable<TDataModel> DataList { get; set; }  
 }
diff --git a/Projects/WebClient/Web.Operation/Packet/CPMetaWbms.cs b/Projects/WebClient/Web.Operation/Packet/CPMetaWbms.cs
index 334b38c..9e0fb8a 100644
--- a/Projects/WebClient/Web.Operation/Packet/CPMetaWbms.cs
+++ b/Projects/WebClient/Web.Operation/Packet/CPMetaWbms.cs
@@ -36,7 +36,7 @@
 
     public class Response_GetWbmsMeta
     {
-        public List<tWbms> Wbms { get; set; }
+        public List<tWbms> Wbms { get; set; } = new List<tWbms>();
         public string Result { get; set; } = string.Empty;
         public string Message { get; set; } = string.Empty;
     }