更新了一个测试函数，找人测试一下

source/DBcon.cs

@@ -605,5 +605,25 @@ namespace BooksManageSystem
             return DBHelper.ExecuteNonQuery(new OleDbCommand("delete from booklist where lid = " + id));
         }
         #endregion
+
+        public string TestCon()
+        {
+            StringBuilder sb = new StringBuilder();
+            sb.AppendLine("queryCountByID");
+            sb.AppendLine(queryCountByID(1).ToString());
+            sb.AppendLine("Lingqu");
+            sb.AppendLine(Lingqu(1, 7, "ling", DateTime.Now).ToString());
+
+
+
+
+
+
+
+            return sb.ToString();
+
+
+        }
+
     }
 }

source/Form1.cs

@@ -697,7 +697,9 @@ namespace BooksManageSystem
 
         private void button1_Click(object sender, EventArgs e)
         {
-            
+            //测试函数
+
+            MessageBox.Show(con.TestCon());
         }
     }
 }