From 5e3b49224674a45a18f1a150703d4d46c6cbeaba Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=8E=8B=E9=83=81=E9=BD=90?= <2050634948@qq.com>
Date: Mon, 23 May 2022 04:04:10 +0000
Subject: [PATCH 1/2] =?UTF-8?q?=E5=88=A0=E9=99=A4=E6=96=87=E4=BB=B6=206?=
 =?UTF-8?q?=E5=8F=B7=E9=99=88=E5=98=89=E9=91=AB?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 "6\345\217\267\351\231\210\345\230\211\351\221\253/.keep" | 0
 1 file changed, 0 insertions(+), 0 deletions(-)
 delete mode 100644 "6\345\217\267\351\231\210\345\230\211\351\221\253/.keep"

diff --git "a/6\345\217\267\351\231\210\345\230\211\351\221\253/.keep" "b/6\345\217\267\351\231\210\345\230\211\351\221\253/.keep"
deleted file mode 100644
index e69de29..0000000
-- 
Gitee


From ef30c0243d5aef2bd83101d69db79835d0fccbdc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E2=80=9C=E7=8E=8B=E9=83=81=E9=BD=90=E2=80=9D?=
 <“2050634948@qq.com”>
Date: Tue, 24 May 2022 21:44:28 +0800
Subject: [PATCH 2/2] =?UTF-8?q?=E7=BB=83=E4=B9=A0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 WebForm1.aspx.cs | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 WebForm1.aspx.cs

diff --git a/WebForm1.aspx.cs b/WebForm1.aspx.cs
new file mode 100644
index 0000000..7e916bf
--- /dev/null
+++ b/WebForm1.aspx.cs
@@ -0,0 +1,38 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Web;
+using System.Web.UI;
+using System.Web.UI.WebControls;
+
+namespace WebApplication1
+{
+    public partial class WebForm1 : System.Web.UI.Page
+    {
+        protected void Page_Load(object sender, EventArgs e)
+        {
+            if (!Page.IsPostBack) {
+                SqlDataSource1.SelectCommand = "select * from city where type=1 ";
+                SqlDataSource2.SelectCommand = "select * from city where type=2 and pid=2";
+                SqlDataSource3.SelectCommand = "select * from city where type=3 and pid in (select id from city where type = 2 and pid = 2)";
+            }
+
+        }
+
+        protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
+        {
+            SqlDataSource2.SelectCommand = "select * from city where type=2 and pid=" + DropDownList1.SelectedValue;
+            SqlDataSource3.SelectCommand = "select * from city where type=3 and pid in (select id from city where type = 2 and pid = " + DropDownList1.SelectedValue+")";
+        }
+
+        protected void DropDownList2_SelectedIndexChanged(object sender, EventArgs e)
+        {
+            SqlDataSource3.SelectCommand = "select * from city where type=3 and pid =" + DropDownList2.SelectedValue;
+        }
+
+        protected void DropDownList3_SelectedIndexChanged(object sender, EventArgs e)
+        {
+
+        }
+    }
+}
\ No newline at end of file
-- 
Gitee