1、Session
2、驗證碼
YZM.ashx
<%@ WebHandler Language="C#" Class="YZM" %>using System;using System.Web;public class YZM : IHttpHandler, System.Web.SessionState.IRequiresSessionState{ public void ProcessRequest (HttpContext context) { context.Response.ContentType = "image/JPEG"; using (System.Drawing.Bitmap bitImage = new System.Drawing.Bitmap(130, 100)) { //設定畫布 using (System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitImage)) { //隨機數字 Random my_random = new Random(); int num_01 = my_random.Next(100); int num_02 = my_random.Next(100); int result = num_01 + num_02; string num_string01 = num_01.ToString(); string num_string02 = num_02.ToString(); string result_string = result.ToString(); //儲存到伺服器的sessionid中 HttpContext.Current.Session["YZM"] = result_string; //設定文字 g.DrawString(num_string01 +"+"+ num_string02+"?", new System.Drawing.Font("宋體", 20), System.Drawing.Brushes.Red, new System.Drawing.PointF(0, 0)); //儲存到輸出資料流中 bitImage.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg); } } } public bool IsReusable { get { return false; } }}
YZM.aspx
<form id="form1" runat="server"> <div> <%--單擊重新整理驗證碼--%> <img src="YZM.ashx" alt="請輸入驗證碼" onclick="this.src='YZM.ashx?aaa='+new Date()" /> </div> <asp:TextBox ID="TextBox1" runat="server" text=""></asp:TextBox> <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" /> </form>
3、http協議
4、按鈕實現標哥行刪除效果 超連結提交表單
5、web開發原則
6、XSS漏洞
label類似控制項:Literal控制項,如果 屬性中text的值為<a href="www.baidu.com">hah</a>可以會被嵌入連結,
可以設定mode屬性為Encode
7、虛擬目錄~ :ASP.net中使用,始終在應用程式根目錄下開始