一般处理程序cookie和session+末尾的多选框，下拉框

  1 登录页面
  2 <body>
  3 <form action="Login.ashx" method="post">
  4 <input type="hidden" name="viewstate" value="123" id="viewstase" />
  5 <table style="margin:200px auto 0px;">
  6 <tr><td colspan="2" style="text-align:center">登陆系统</td></tr>
  7 <tr><td>用户名：</td><td><input type="text" name="username" value="$name" id="username" /></td></tr>
  8 <tr><td>密码：</td><td><input type="text" name="pwd" id="pwd" value="$pwd" /></td></tr>
  9 <tr><td colspan="2" style="text-align:center"><input type="submit" value="登陆" /></td></tr>
 10 </table>
 11 </form>
 12 </body>
 13 登录页面.ashx
 14 using System;
 15 using System.Collections.Generic;
 16 using System.Linq;
 17 using System.Web;
 18 using System.Data.SqlClient;
 19 using FirstWeb;
 20 using System.IO;
 21 using System.Web.SessionState;
 22 
 23 namespace Lesson3
 24 {
 25 /// <summary>
 26 /// Login 的摘要说明
 27 /// </summary>
 28 public class Login : IHttpHandler,IRequiresSessionState
 29 {
 30 
 31 public void ProcessRequest(HttpContext context)
 32 {
 33 //context.Response.ContentType = "text/html";
 34 //context.Response.Write("Hello World");
 35 context.Response.ContentType = "text/html";
 36 string name = context.Request["username"];
 37 string Pwd = context.Request["pwd"];
 38 string path = context.Request.MapPath("Login.htm"); //将Login.htm文件的相对路径改为绝对路径
 39 string loginhtml = File.ReadAllText(path);//读取文件内容
 40 string viewstate = context.Request["viewstate"];
 41 bool IsPostBack = !string.IsNullOrEmpty(viewstate);
 42 if (!IsPostBack)//第一次访问页面
 43 {
 44 HttpCookie cookie = context.Request.Cookies["Login"]; 
 45 if (cookie!=null)
 46 {
 47 //获取客户端保存的HttpCookie对象或值：context.Request.Cookies["Login"]
 48 string username = cookie["name"];
 49 string userpwd = cookie.Values["pwd"];
 50 loginhtml = loginhtml.Replace("$name", username).Replace("$pwd", userpwd);
 51 }
 52 else
 53 {
 54 loginhtml = loginhtml.Replace("$name", "").Replace("$pwd", "");
 55 } 
 56 context.Response.Write(loginhtml);
 57 return;
 58 }
 59 
 60 string sql = "select count(*) from Users where UserName=@username and Pwd=@pwd";
 61 SqlParameter[] sps ={
 62 new SqlParameter("@username",name),
 63 new SqlParameter("@Pwd",Pwd)
 64 };
 65 int result = Convert.ToInt32(sqlhelper.GetExecuteScalar(sql, sps));
 66 
 67 if (result > 0)
 68 {
 69 //HttpCookie cookie = new HttpCookie("Login");
 70 //cookie.Values["name"] = name;
 71 //cookie["pwd"] = Pwd;
 72 //cookie.Expires = DateTime.Now.AddMinutes(1);
 73 //context.Response.Cookies.Add(cookie);
 74 
 75 context.Response.Cookies["Login"]["name"] = name;
 76 context.Response.Cookies["Login"]["pwd"] = Pwd;
 77 context.Response.Cookies["Login"].Expires = DateTime.Now.AddMinutes(1);
 78 context.Response.Write("登陆成功！");
 79 
 80 context.Session["user"] = name;
 81 context.Application.Lock();//修改Application数据之前，需要先加锁处理，防止别人登录(一次只让一个人登陆，防止多人同时修改数据)
 82 context.Application["online"] = Convert.ToInt32(context.Application["online"]) + 1;
 83 context.Application.UnLock();//修改Application数据之后，需要先解锁处理，以供别人登录
 84 context.Response.Redirect("ApplicationTest.aspx");
 85 //context.Response.Write(cookie.Value);
 86 }
 87 else
 88 {
 89 loginhtml = loginhtml.Replace("$name",name).Replace("$pwd",Pwd);
 90 context.Response.Write(loginhtml);
 91 context.Response.Write("<script>alert('登陆失败！')</script>");
 92 }
 93 }
 94 
 95 public bool IsReusable
 96 {
 97 get
 98 {
 99 return false;
100 }
101 }
102 }
103 }
104 
105  
106 
107  
108 
109  
110 
111  
112 
113  
114 
115  
116 
117  
118 
119 1.AddStudent.htm
120 
121 1-1
122 <body>
123 <form action="AddStudent.ashx" method="post">
124 <table style="margin:10px auto">
125 <tr><td colspan="2" style="text-align:center">添加学生信息</td></tr>
126 <tr><td>学号：</td><td>
127 <input id="Text1" type="text" name="stuNo" /></td></tr>
128 <tr><td>姓名：</td><td>
129 <input id="Text2" type="text" name="stuName" /></td></tr>
130 <tr><td>性别</td><td>
131 <input id="Radio1" type="radio" name="sex" value="男" />男
132 <input id="Radio2" type="radio" name="sex" value="女" />女</td></tr>
133 <tr><td>出生日期：</td><td>
134 <input id="Text4" type="text" name="birthday" /></td></tr>
135 <tr><td>电话：</td><td>
136 <input id="Text5" type="text" name="phone" /></td></tr>
137 <tr><td>地址：</td><td>
138 <input id="Text6" type="text" name="address" /></td></tr>
139 <tr><td>Email:</td><td>
140 <input id="Text7" type="text" name="email" /></td></tr>
141 <tr><td colspan="2" style="text-align:center">
142 <input id="Submit1" type="submit" value="添加" /></td></tr>
143 </table>
144 </form>
145 </body>
146 1-2
147 using System;
148 using System.Collections.Generic;
149 using System.Linq;
150 using System.Web;
151 using System.IO;
152 using System.Data.SqlClient;
153 using FirstWeb;
154 
155 namespace Lesson3
156 {
157 /// <summary>
158 /// AddStudent 的摘要说明
159 /// </summary>
160 public class AddStudent : IHttpHandler
161 {
162 
163 public void ProcessRequest(HttpContext context)
164 {
165 context.Response.ContentType = "text/html";
166 //1.接收数据，这是从添加页面的name="stuName"获取的用户输入的信息
167 string stuName = context.Request["stuName"];
168 string stuNo = context.Request["stuNo"];
169 string sex = context.Request["sex"];
170 string birthday = context.Request["birthday"];
171 string phone = context.Request["phone"];
172 string address = context.Request["address"];
173 string email = context.Request["email"];
174 //将htm文件的相对路径转为绝对路径
175 string path = context.Request.MapPath("AddStudent.htm");
176 string html = File.ReadAllText(path);
177 //2.对接收数据进行处理
178 string msg = "";
179 if (string.IsNullOrEmpty(stuNo))
180 {
181 msg =msg + "学号不能为空";
182 //context.Response.Write("<script>alert('学号不能为空！')</script>");
183 }
184 if (string.IsNullOrEmpty(sex))
185 {
186 msg += "\n请选择性别";
187 }
188 if (!string.IsNullOrEmpty(birthday))
189 {
190 DateTime birth;
191 bool tag = DateTime.TryParse(birthday, out birth);
192 if (!tag)
193 {
194 msg += "\n日期格式错误";
195 }
196 }
197 
198 if (msg!="")
199 {
200 context.Response.Write("<script>alert('"+msg+"')</script>");
201 context.Response.Write(html);
202 context.Response.End();
203 }
204 
205 string sql = "declare @loginId int insert into users values(@username,@pwd);set @loginId=scope_identity();" +
206 "insert into tab_student values (@stuNo,@stuName,@sex,@birthday,@phone," +
207 "@address,@email,@IsDel,@loginId)";
208 SqlParameter[] sps = {
209 new SqlParameter("@username",stuNo),
210 new SqlParameter("@pwd",stuNo),
211 new SqlParameter("@stuNo",stuNo),
212 new SqlParameter("@stuName",stuName),
213 new SqlParameter("@sex",sex),
214 new SqlParameter("@birthday",birthday),
215 new SqlParameter("@phone",phone),
216 new SqlParameter("@address",address),
217 new SqlParameter("@email",email),
218 new SqlParameter("@IsDel",false)
219 };
220 int insert = sqlhelper.GetExecuteNotQuery(sql, sps);
221 //string sql = "insert into users values(@username,@pwd);select scope_identity()";
222 //获取Users表里的主键id
223 //SqlParameter[] sps ={
224 // new SqlParameter("@username",stuNo),
225 // new SqlParameter("@pwd",stuNo)
226 // };
227 //int loginId = Convert.ToInt32(sqlhelper.GetExecuteScalar(sql,sps));//查询login的id
228 
229 //string sql1 = "insert into tab_student values (@stuNo,@stuName,@sex,@birthday,@phone,@address,@email,@IsDel,@loginId) ";
230 //SqlParameter[] sps1 = {
231 // new SqlParameter("@stuNo",stuNo),
232 // new SqlParameter("@stuName",stuName),
233 // new SqlParameter("@sex",sex),
234 // new SqlParameter("@birthday",birthday),
235 // new SqlParameter("@phone",phone),
236 // new SqlParameter("@address",address),
237 // new SqlParameter("@email",email),
238 // new SqlParameter("@IsDel",false),
239 // new SqlParameter("@loginId",loginId),
240 
241 // };
242 //int insert = sqlhelper.GetExecuteNotQuery(sql1, sps1);
243 if (insert>0)
244 {
245 // context.Response.Write("<script>alert('登陆成功')</script>");
246 context.Response.Redirect("StudentList.ashx");
247 //context.Response.Write(html);
248 //context.Response.End();
249 }
250 else
251 {
252 context.Response.Write("<script>alert('添加失败')</script>");
253 context.Response.Write(html);
254 context.Response.End();
255 }
256 //context.Response.Write("Hello World");
257 }
258 
259 public bool IsReusable
260 {
261 get
262 {
263 return false;
264 }
265 }
266 }
267 }
268 2
269 2-1StudentList.htm
270 <html xmlns="http://www.w3.org/1999/xhtml">
271 <head>
272 <title></title>
273 <script type="text/javascript">
274 function confrim() {
275 if (confirm("是否要删除！"))
276 { return true; }
277 return false;
278 }
279 </script>
280 
281 </head>
282 <body>
283 <div style="800px">
284 <input type="button" name="sub" value="添加" onclick="Add();" />
285 <script type="text/javascript">
286 function Add() {
287 window.location.href = "AddStudent.htm";
288 }
289 </script>
290 <!--//<form action="StudentList.ashx" method="post">-->
291 <form method="post">
292 $tbody
293 </form>
294 </div>
295 </body>
296 </html>
297 
298 2-2StudentList.ashx
299 using System;
300 using System.Collections.Generic;
301 using System.Linq;
302 using System.Web;
303 using System.Data.SqlClient;
304 using System.Configuration;
305 using System.Text;
306 using System.Data;
307 using FirstWeb;
308 using System.IO;
309 
310 namespace Lesson3
311 {
312 /// <summary>
313 /// StudentList 的摘要说明
314 /// </summary>
315 public class StudentList : IHttpHandler
316 {
317 
318 public void ProcessRequest(HttpContext context)
319 {
320 string flag = context.Request.QueryString["flag"];
321 if (!string.IsNullOrEmpty(flag))
322 {
323 int result = Convert.ToInt32(flag);
324 if (result > 0)
325 {
326 context.Response.Write("<script>alert('删除成功')</script>");
327 }
328 else
329 {
330 context.Response.Write("<script>alert('删除失败')</script>");
331 }
332 }
333 
334 context.Response.ContentType = "text/html";
335 string path= context.Request.MapPath("StudentList.htm");
336 string html = File.ReadAllText(path); 
337 StringBuilder table = new StringBuilder();
338 table.Append("<table style='800px;margin:10px auto;text-align:center;'>");
339 table.Append("<tr><th>学号</th><th>姓名</th><th>性别</th><th>出生日期</th><th>年纪</th><th>电话</th><th>地址</th><th>Email</th><th>操作</th></tr>");
340 
341 string sql = "select * from tab_student";
342 DataTable dt = sqlhelper.GetDataTable1(sql);
343 foreach (DataRow dr in dt.Rows)
344 {
345 string age = "";
346 if (dr["birthday"] == DBNull.Value)
347 {
348 age = "未知";
349 
350 }
351 else
352 {
353 int nowyear = DateTime.Now.Year;
354 int oldyear = Convert.ToDateTime(dr["birthday"]).Year;
355 if (oldyear == 1900)
356 { age = "未知"; }
357 else
358 {
359 age = (nowyear - oldyear).ToString();
360 }
361 }
362 
363 string stuNo = dr["stuNo"].ToString();
364 string stuName = dr["stuName"].ToString();
365 string sex = dr["sex"].ToString();
366 string birthday = dr["birthday"].ToString();
367 string phone = dr["phone"].ToString();
368 string address = dr["address"].ToString();
369 string email = dr["email"].ToString();
370 string loginid=dr["loginId"].ToString();
371 table.Append("<tr><td>" + stuNo + "</td><td>" + stuName + "</td><td>" + sex + "</td><td>" + birthday + "</td><td>" + age + "</td><td>"
372 + phone + "</td><td>" + address + "</td><td>" + email + "</td>"
373 +"<td><a href='StudentDel.ashx?id=" + loginid + "' onclick='return confrim("是否要删除")'>删除</a>"
374 +"&nbsp;<a href='StudentExitShow.ashx?id=" + loginid + "'</td>修改</tr>");
375 
376 }
377 
378 
379 table.Append("</table>");
380 // table.ToString();
381 html = html.Replace("$tbody", table.ToString());
382 context.Response.Write(html);
383 }
384 
385 public bool IsReusable
386 {
387 get
388 {
389 return false;
390 }
391 }
392 }
393 }
394 <div style="800px">
395 <input type="button" name="sub" value="添加" onclick="Add();" />
396 <script type="text/javascript">
397 function Add() {
398 window.location.href = "AddStudent.htm";
399 }
400 </script>
401 <!--//<form action="StudentList.ashx" method="post">-->
402 <form method="post">
403 $tbody
404 </form>
405 </div>
406 </body>
407 </html>
408 3
409 3-1StudentDel.ashx
410 using System;
411 using System.Collections.Generic;
412 using System.Linq;
413 using System.Web;
414 using System.Data.SqlClient;
415 
416 
417 namespace Lesson3
418 {
419 /// <summary>
420 /// StudentDel 的摘要说明
421 /// </summary>
422 public class StudentDel : IHttpHandler
423 {
424 
425 public void ProcessRequest(HttpContext context)
426 {
427 context.Response.ContentType = "text/plain";
428 // context.Response.Write("Hello World");
429 string id = context.Request.QueryString["id"];
430 if (string.IsNullOrEmpty(id))
431 {
432 return;
433 }
434 string sql = "delete from tab_student where loginId=@loginId " 
435 +"delete from Users where ID=@loginId";
436 SqlParameter sps = new SqlParameter("@loginId", id);
437 int result = FirstWeb.sqlhelper.GetExecuteNotQuery(sql, sps);
438 context.Response.Redirect("StudentList.ashx?flag=" + result);
439 }
440 
441 public bool IsReusable
442 {
443 get
444 {
445 return false;
446 }
447 }
448 }
449 }
450 4
451 4.1StudentExit.htm
452 <body>
453 <!--<form action="StudentExit.ashx" method="post">-->
454 <form method="post">
455 <input type="hidden" name="hidID" value="@ID" />
456 <table style="margin:50px auto">
457 <tr><th colspan="2" style="text-align:left">修改学生信息:</th></tr>
458 <tr><td class="style1">学号：</td><td><input type="text" name="stuNo" value="@stuNo" /></td></tr>
459 <tr><td class="style1">姓名：</td><td><input type="text" name="stuName" value="@stuName" /></td></tr>
460 <tr><td class="style1">性别：</td><td><input type="radio" name="sex" value="男" boy="@boy" />男<input type="radio" name="sex" value="女" girl="@girl" />女</td></tr>
461 <tr><td class="style1">出生日期：</td><td><input type="text" name="birthday" value="@birthday" /></td></tr>
462 <tr><td class="style1">电话：</td><td><input type="text" name="phone" value="@phone"/></td></tr>
463 <tr><td class="style1">地址：</td><td><input type="text" name="address"value="@address" /></td></tr>
464 <tr><td class="style1">Email</td><td><input type="text" name="email" value="@email" /></td></tr>
465 <tr><td colspan="2" style="text-align:center"><input type="submit" value="修改" />
466 <input type="button" value="返回" onclick="funhui()" /></td></tr>
467 </table>
468 <script type="text/javascript">
469 function funhui() {
470 window.location.href = "StudentList.ashx";
471 }
472 </script>
473 <!--<script type="text/javascript">
474 function Exit() {
475 window.location.href = "StudentExit.ashx";
476 }
477 </script>-->
478 </form>
479 </body>
480 4.2StudentExitShow.ashx
481 using System;
482 using System.Collections.Generic;
483 using System.Linq;
484 using System.Web;
485 using System.Data.SqlClient;
486 using System.Data;
487 using System.IO;
488 
489 namespace Lesson3
490 {
491 /// <summary>
492 /// StudentExitShow 的摘要说明
493 /// </summary>
494 public class StudentExitShow : IHttpHandler
495 {
496 
497 public void ProcessRequest(HttpContext context)
498 {
499 context.Response.ContentType = "text/html";
500 //context.Response.Write("Hello World");
501 string path = context.Request.MapPath("StudentExit.htm");
502 string html = File.ReadAllText(path);
503 string loginid = context.Request.QueryString["id"];
504 if (string.IsNullOrEmpty(loginid))
505 {
506 context.Response.Redirect("StudentList.ashx");
507 }
508 string id = context.Request["hidID"];
509 bool IspostBack = !string.IsNullOrEmpty(id);
510 if (!IspostBack)
511 {
512 string sql = "select [ID],[stuNo],[stuName],[sex],convert(varchar,birthday,111) as birthday,[phone],[address],[email],[IsDel],[loginId] from tab_student where [loginId]=@loginid";
513 SqlParameter[] sps = { new SqlParameter("@loginid", loginid) };
514 DataTable dt = FirstWeb.sqlhelper.GetDataTable1(sql, sps);
515 html = html.Replace("@stuNo", dt.Rows[0]["stuNo"].ToString());
516 html = html.Replace("@stuName", dt.Rows[0]["stuName"].ToString());
517 html = html.Replace("@phone", dt.Rows[0]["phone"].ToString());
518 html = html.Replace("@address", dt.Rows[0]["address"].ToString());
519 html = html.Replace("@email", dt.Rows[0]["email"].ToString());
520 html = html.Replace("@ID", dt.Rows[0]["loginid"].ToString());
521 string sex = dt.Rows[0]["sex"].ToString();
522 if (sex == "男")
523 {
524 html = html.Replace("boy="@boy"", "checked");
525 }
526 else
527 { html = html.Replace("girl="@girl"", "checked"); }
528 if (dt.Rows[0]["birthday"].ToString().Substring(0, 4) == "1900")
529 {
530 html = html.Replace("@birthday", "");
531 }
532 else
533 { html = html.Replace("@birthday", dt.Rows[0]["birthday"].ToString()); }
534 
535 
536 context.Response.Write(html);
537 
538 }
539 else
540 {
541 string stuNo = context.Request["stuNo"];
542 string stuName = context.Request["stuName"];
543 string sex = context.Request["sex"];
544 string birthday = context.Request["birthday"];
545 string phone = context.Request["phone"];
546 string address = context.Request["address"];
547 string email = context.Request["email"];
548 string sql = "update tab_student set stuNo=@stuNo,stuName=@stuName,sex=@sex,birthday=@birthday,phone=@phone,address=@address,email=@email where [loginId]=@loginId "
549 + "update Users set [UserName]=@stuNo,[Pwd]=@stuNo where [ID]=@loginId";
550 SqlParameter[] sps ={
551 new SqlParameter("@stuNo",stuNo),
552 new SqlParameter("@stuName",stuName),
553 new SqlParameter("@sex",sex),
554 new SqlParameter("@birthday",birthday),
555 new SqlParameter("@phone",phone),
556 new SqlParameter("@address",address),
557 new SqlParameter("@email",email),
558 new SqlParameter("@loginId",id)
559 };
560 int result = FirstWeb.sqlhelper.GetExecuteNotQuery(sql, sps);
561 if (result > 0)
562 {
563 context.Response.Redirect("StudentList.ashx");
564 }
565 else
566 {
567 context.Response.Write("<script>alert('修改失败！')</script>");
568 }
569 }
570 }
571 
572 
573 public bool IsReusable
574 {
575 get
576 {
577 return false;
578 }
579 }
580 }
581 }
582 -------------------------------------------
583 
584 -----------------------------------
585 1ban 2ban 3ban 4ban RadioButtonList
586 只要是列表xxList都有ListItem 列表选项
587 RadioButtonList1就是班级框列表
588 操作代码都是写在按钮里的，然后在按钮里绑定其控件
589 if(RadioButtonList1.selectedIndex<0)
590 {
591 response.write("<script>alert('选择班级')</script>");
592 return;
593 }
594 Response.Write("<script>alert('你选择的班级的index是"+RadioButtonList1.SelectedIndex+"')</script>");
595 Response.Write("");
596 ----------------
597 男 女
598 string s="";
599 if(RadioButton1.cheched)
600 {
601 s=RadioButton1.Text;
602 }
603 if(RadioButton2.Checked)
604 {
605 s=RadioButton2.Text;
606 }
607 response.write("<script>alert('"+s+"')</script>");
608 --------------------
609 爱好：篮球 足球 多选框 CheckBoxList1
610 string s="";
611 for循环出所有选中的
612 foreach(ListItem item in CheckBoxList1.item)
613 {
614 if(item.Selected)
615 {
616 s=s+item.Text+"";
617 }
618 response.Write("<script>alert('"+s+"')</script>");
619 }
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原文地址：https://www.cnblogs.com/ZkbFighting/p/8142925.html