先建立一個一般處理程序，ListHandler.ashx，然后將數據庫中的數據讀取出來，並在網頁中顯示 代碼如下：
<%@ WebHandler Language="C#" Class="ListHandler" %> using System; using System.Web; using System.Configuration; using System.Data.SqlClient; using System.Text; public class ListHandler : IHttpHandler { public void ProcessRequest (HttpContext context) { context.Response.ContentType = "text/html"; //context.Response.Write("Hello World"); StringBuilder sb = new StringBuilder();//拼接字符串 sb.Append("<html><head></head><body><a href='addDate.html'>增加站點信息</a>");//APPend()要成對出現 //下面拼接表頭 sb.Append("<table><tr><th>Id</th> <th>站名</th> <th>站號</th> <th>登陸用戶名</th> <th>登陸密碼</th><th>操 作</th></tr>"); string str= ConfigurationManager.ConnectionStrings["BjQx"].ConnectionString; using (SqlConnection conn=new SqlConnection (str)) { string sql = "select * from Tbl_ZhanMing"; using (SqlCommand cmd=new SqlCommand (sql,conn)) { conn.Open(); using (var reader=cmd.ExecuteReader()) { while (reader.Read()) { //拼接字符串 sb.AppendFormat("<tr><td>{0}</td><td>{1}</td><td>{2}</td><td>{3}</td><td>{4}</td>"+ "<td><a href='DetailHandler.ashx?Id={0}' target=_blank>詳情</a> "+ "<a onclick='return confirm(\"是否刪除？\")' href='Delete.ashx?Id={0}' >刪除</a> "+ " <a onclick='return confirm(\"是否修改\")' href='EditShow.ashx?Id={0}&action=show'>修改</a></td></tr>", reader.GetInt32(0), reader["站名"], reader["站號"], reader["登陸用戶名"], reader["登陸密碼"]); } } } } sb.Append("</table>"); sb.Append("</body></html>"); //把上面拼接的字符串寫入網頁中 context.Response.Write(sb.ToString());//一般要寫為sb.ToString() } public bool IsReusable { get { return false; } } }
點擊 “詳情”時，則跳轉到'DetailHandler.ashx頁面，該頁面顯示出所點擊的站點信息，代碼如下：
<%@ WebHandler Language="C#" Class="DetailHandler" %> using System; using System.Web; using System.Configuration; using System.Data.SqlClient; using System.Text; using System.Data; using System.IO; public class DetailHandler : IHttpHandler { public void ProcessRequest (HttpContext context) { context.Response.ContentType = "text/html"; //context.Response.Write("Hello World"); StringBuilder sb = new StringBuilder(); //先接收點擊“詳情”發過來的信息 string Id = context.Request.QueryString["Id"]; int ZId = int.Parse(Id); //通過ID號，連接數據庫並將內容顯示在該網頁中 用SQLDataAdapter string strLink = ConfigurationManager.ConnectionStrings["BjQx"].ConnectionString; string sql = "select * from Tbl_ZhanMing where Id=@Id"; using (SqlDataAdapter adapter = new SqlDataAdapter(sql, strLink)) { //傳遞參數過來 adapter.SelectCommand.Parameters.Add("@Id", ZId); //創建一個表格對象 DataTable dt = new DataTable(); adapter.Fill(dt);//在網頁中填充表格 //下面進行填充表格 sb.AppendFormat("<tr><td>Id:</td><td>{0}</td></tr>", dt.Rows[0]["Id"]); sb.AppendFormat("<tr><td>站名:</td><td>{0}</td></tr>", dt.Rows[0]["站名"]); sb.AppendFormat("<tr><td>站號:</td><td>{0}</td></tr>", dt.Rows[0]["站號"]); sb.AppendFormat("<tr><td>登陸用戶名:</td><td>{0}</td></tr>", dt.Rows[0]["登陸用戶名"]); sb.AppendFormat("<tr><td>登陸密碼:</td><td>{0}</td></tr>", dt.Rows[0]["登陸密碼"]); } //寫一個HTML模板 string path = context.Request.MapPath("/showresult.html"); string texttemp = File.ReadAllText(path);//將整個html網頁賦值給他 string result = texttemp.Replace("@NBBiJie", sb.ToString()); context.Response.Write(result); } public bool IsReusable { get { return false; } } }
當點擊“增加站點信息”按鈕時，則跳轉到addDate.html 頁面，在該HTML表單里寫入<form id="frmAdd" action="AddDateHandle.ashx">，提交表單時則跳轉到
AddDateHandle.ashx頁。
addDate.html 頁面代碼如下：
<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title></title> <meta charset="utf-8" /> </head> <body> <h1>請增加如下內容：</h1> <form id="frmAdd" action="AddDateHandle.ashx"> <table> <tr> <td>站名：</td> <td> <input type="text" name="zhanming" /> </td> </tr> <tr> <td>站號：</td> <td> <input type="text" name="zhanhao" /> </td> </tr> <tr> <td>登陸用戶名：</td> <td> <input type="text" name="username"/> </td> </tr> <tr> <td>登錄密碼：</td> <td> <input type="text" name="password" /> </td> </tr> <tr> <td> <input type="submit" value="提交" /> </td> <td> <input type="reset" value="重置" /> </td> </tr> </table> </form> </body> </html>
AddDateHandle.ashx一般處理程序頁面代碼如下：
<%@ WebHandler Language="C#" Class="AddDateHandle" %> using System; using System.Web; using System.Configuration; using System.Data.SqlClient; public class AddDateHandle : IHttpHandler { public void ProcessRequest (HttpContext context) { context.Response.ContentType = "text/html"; //context.Response.Write("Hello World"); //拿到addDate.html上交來的數據 string zhanming = context.Request["zhanming"]; int zhanhao =int.Parse(context.Request["zhanhao"]); string username = context.Request["username"]; string passsword = context.Request["password"]; //接下來做數據庫插入操作 string str = ConfigurationManager.ConnectionStrings["BJQx"].ConnectionString; using (SqlConnection conn=new SqlConnection (str)) { string sql = string.Format("insert into Tbl_ZhanMing (站名,站號,登陸用戶名,登陸密碼) values ('{0}',{1},'{2}','{3}') select * from Tbl_ZhanMing",zhanming,zhanhao,username,passsword); using (SqlCommand cmd=new SqlCommand (sql,conn)) { conn.Open(); int r= cmd.ExecuteNonQuery(); } } context.Response.Redirect("ListHandler.ashx"); } public bool IsReusable { get { return false; } } }
以上代碼完成了對數據的增加，全部顯示，和顯示所點擊那一條信息的詳情的操作。
當在ListHandler.ashx所顯示的頁面上，點擊“刪除”按鈕時，則跳轉到Delete.ashx頁。此步驟完成對數據庫表中的數據進行刪除操作。該頁面的代碼如下：
<%@ WebHandler Language="C#" Class="Delete" %> using System; using System.Web; using System.Configuration; using System.Data.SqlClient; public class Delete : IHttpHandler { public void ProcessRequest (HttpContext context) { context.Response.ContentType = "text/plain"; //context.Response.Write("Hello World"); //獲取提交刪除的Id string Id= context.Request["Id"]; int delId = int.Parse(Id); //連接數據庫進行刪除操作 string constr = ConfigurationManager.ConnectionStrings["BJQx"].ConnectionString; using (SqlConnection conn=new SqlConnection (constr)) { string sql = "delete from Tbl_ZhanMing where Id=@Id"; using (SqlCommand cmd=new SqlCommand (sql,conn)) { conn.Open(); cmd.Parameters.Add(new SqlParameter("@Id", delId)); int rows = cmd.ExecuteNonQuery(); if (rows>0) { //刪除成功 context.Response.Redirect("ListHandler.ashx"); } else { context.Response.Write("刪除失敗！"); } } } } public bool IsReusable { get { return false; } } }
一下代碼對數據庫列表進行修改操作，當點擊“修改”按鈕時，則跳轉到EditShow.ashx，代碼如下：
<%@ WebHandler Language="C#" Class="Alter" %> using System; using System.Web; using System.Configuration; using System.Data.SqlClient; using System.Data; using System.IO; public class Alter : IHttpHandler { public void ProcessRequest (HttpContext context) { context.Response.ContentType = "text/html";// 切記 此處要改為html，否則就把源碼輸出來了！ //用於顯示修改數據的 if (context.Request["action"] == "show") { //先拿到需要修改的那一行的Id int altId = int.Parse(context.Request["Id"]); //建立數據庫連接 填充網頁一般用SqlDataAdapter string str = ConfigurationManager.ConnectionStrings["BjQx"].ConnectionString; string sql = "select *from Tbl_ZhanMing where Id=@Id"; using (SqlDataAdapter adapter = new SqlDataAdapter(sql, str)) { //將ID傳遞過來 adapter.SelectCommand.Parameters.Add("@Id", altId); //填充表格 DataTable dt = new DataTable();//創建一個表格對象 adapter.Fill(dt); //直接在后台拼接字符串太麻煩，所以寫一個模板 EditTemp.html string strResult = File.ReadAllText(context.Request.MapPath("EditTemp.html")); //File.ReadAllText()需要的是一個絕對路徑 strResult = strResult.Replace("@txtZhanMing", dt.Rows[0]["站名"].ToString());//第一行站名這一列全部顯示出來 strResult = strResult.Replace("@txtZhanHao", dt.Rows[0]["站號"].ToString()); strResult = strResult.Replace("@txtUserName", dt.Rows[0]["登陸用戶名"].ToString()); strResult = strResult.Replace("@txtPassWord", dt.Rows[0]["登陸密碼"].ToString()); strResult = strResult.Replace("@Id", dt.Rows[0]["Id"].ToString()); context.Response.Write(strResult); } } } public bool IsReusable { get { return false; } } }
EditShow.ashx需要一個html模板EditTemp.html，代碼如下：
<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title></title> <meta charset="utf-8" /> </head> <body> <form method="post" action="EditProcess.ashx"> <input type="hidden" name="hidId" value="@Id" /> <table> <tr> <td>站名：</td> <td> <input type="text" name="txtZhanMing" value="@txtZhanMing"/> </td> </tr> <tr> <td>站號：</td> <td> <input type="text" name="txtZhanHao" value="@txtZhanHao" /> </td> </tr> <tr> <td>登陸用戶名：</td> <td> <input type="text" name="txtUserName" value="@txtUserName"/> </td> </tr> <tr> <td>登錄密碼：</td> <td> <input type="text" name="txtPassWord" value="@txtPassWord" /> </td> </tr> <tr> <td colspan="2"> <input type="submit" value="修改" /> </td> </tr> </table> </form> </body> </html>
在EditTemp.html頁面上，當點擊“修改”按鈕時，跳轉到EditProcess.ashx,則可以直接對所選中的數據庫列表進行修改操作。代碼如下：
<%@ WebHandler Language="C#" Class="EditProcess" %> using System; using System.Web; using System.Configuration; using System.Data.SqlClient; public class EditProcess : IHttpHandler { public void ProcessRequest (HttpContext context) { context.Response.ContentType = "text/html"; //用於修改數據的 //先拿到要修改的這一行的信息，不知道Id,因此只能單獨取，我們知道name的值 string txtZhanMing = context.Request["txtZhanMing"]; int txtZhanHao = int.Parse(context.Request["txtZhanHao"]); string txtUserName = context.Request["txtUserName"]; string txtPassWord = context.Request["txtPassWord"]; int editId = int.Parse(context.Request["hidId"]);//通過網頁的名字來取ID //建立數據庫連接 string str = ConfigurationManager.ConnectionStrings["BjQx"].ConnectionString; using (SqlConnection conn=new SqlConnection (str)) { string sql = "update Tbl_ZhanMing set 站名=@txtZhanMing,站號=@txtZhanHao,登陸用戶名=@txtUserName,登陸密碼=@txtPassWord where Id=@Id"; using (SqlCommand cmd=new SqlCommand(sql,conn)) { //將sql語句的參數全部給其賦值 cmd.Parameters.Add(new SqlParameter("@Id", editId)); cmd.Parameters.Add(new SqlParameter("@txtZhanMing", txtZhanMing)); cmd.Parameters.Add(new SqlParameter("@txtZhanHao", txtZhanHao)); cmd.Parameters.Add(new SqlParameter("@txtUserName", txtUserName)); cmd.Parameters.Add(new SqlParameter("@txtPassWord", txtPassWord)); conn.Open(); int r = cmd.ExecuteNonQuery(); if (r>0) { context.Response.Redirect("ListHandler.ashx"); } else { context.Response.Write("修改失敗！"); } } } } public bool IsReusable { get { return false; } } }
以上代碼實現了對數據庫的增刪改查操作。