diff --git a/PaginationUtil.cs b/PaginationUtil.cs
index c44e0ad..7ef3172 100644
--- a/PaginationUtil.cs
+++ b/PaginationUtil.cs
@@ -246,8 +246,16 @@
             }
 
             DataTable table = OledbHelper.QueryTable(sql);
-            int result = int.Parse(table.Rows[0].ItemArray[0].ToString());
-            return result;
+            // 当查询异常时，返回-1，否则管径查询在数字框里 输入特殊字符会导致系统崩溃
+            if (table == null)
+            {
+                return -1;
+            }
+            else {
+                int result = int.Parse(table.Rows[0].ItemArray[0].ToString());
+                return result;
+            }
+
         }
         public static int CountSql(string layerName, string filedObject, List<string> filedValueList)
         {