diff --git a/ViewModel/Grading/GradingResultVM.cs b/ViewModel/Grading/GradingResultVM.cs
index bf9dc68..4f67610 100644
--- a/ViewModel/Grading/GradingResultVM.cs
+++ b/ViewModel/Grading/GradingResultVM.cs
@@ -1107,7 +1107,7 @@ public class Name
 
     public static string getNameById(string id)
     {
-        string sql = $"SELECT NAME, EN_NAME FROM NAME WHERE ID = {id}";
+        string sql = $"SELECT NAME, EN_NAME FROM NAME WHERE ID = '{id}'";
         DataTable data = DataBaseHelper.ExecuteQuery(sql);
         string nameType = MultilingualHelper.getString("NameType");
         if (data.Rows.Count>0)