1using System;
  2using System.Data;
  3using System.Configuration;
  4using System.Collections;
  5using System.Web;
  6using System.Web.Security;
  7using System.Web.UI;
  8using System.Web.UI.WebControls;
  9using System.Web.UI.WebControls.WebParts;
 10using System.Web.UI.HtmlControls;
 11using System.IO;
 12using System.Globalization;
 13using System.Reflection;
 14public partial class List : System.Web.UI.Page,ICallbackEventHandler
 15...{
 16    protected void Page_Load(object sender, EventArgs e)
 17    ...{
 18        //从cookie中获取身份验证票信息
 19        string cookieName = FormsAuthentication.FormsCookieName;
 20        HttpCookie authCookie = Context.Request.Cookies[cookieName];
 21
 22
 23        if (authCookie != null)
 24        ...{
 25            div2.Visible = true;
 26            //解密
 27            FormsAuthenticationTicket authTicket = FormsAuthentication.Decrypt(authCookie.Value);
 28            Link.Text = authTicket.Name.ToString();
 29            LinkRole.Text = authTicket.UserData.ToString();
 30
 31        }
 32        else
 33        ...{ div2.Visible = false; }
 34
 35       //第一次加载时绑定datalist控件为第一页
 36        if (!Page.IsPostBack)
 37            bind(0);
 38       
 39
 40      }
 41
 42   
 43    protected void Linkout_Click(object sender, EventArgs e)
 44    ...{
 45        System.Web.Security.FormsAuthentication.SignOut();
 46
 47        string url = "List.aspx?category=" + Request.QueryString["category"];
 48        Context.Response.Redirect(url);
 49    }
 50    protected void login_Click(object sender, ImageClickEventArgs e)
 51    ...{
 52        if (txtid.Text != "" && txtpwd.Text != "")
 53        ...{
 54            string UserName = txtid.Text.Trim();
 55            string UserPwd = txtpwd.Text.Trim();
 56
 57            DataVisit mydv = new DataVisit();//创建访问层的类
 58            if (mydv.Confirm(UserName, UserPwd))//验证用户是否合法
 59            ...{
 60                string UserRoles = mydv.GetRoles(UserName);//获取用户角色的字符串
 61                //建立身份验证票据对象
 62                FormsAuthenticationTicket Ticket = new FormsAuthenticationTicket(1, UserName, DateTime.Now, DateTime.Now.AddHours(1), false, UserRoles, "/");
 63                //加密序列化验证票为字符串
 64                string HashTicket = FormsAuthentication.Encrypt(Ticket);
 65                //创建cookie
 66                HttpCookie UserCookie = new HttpCookie(FormsAuthentication.FormsCookieName, HashTicket);
 67                //输出cookie
 68                Context.Response.Cookies.Add(UserCookie);
 69                // div2.Visible = true;
 70                string url="List.aspx?category="+Request.QueryString["category"];
 71                Context.Response.Redirect(url);
 72
 73
 74
 75
 76            }
 77            else
 78            ...{
 79                txtid.Text = "不正确！用户名或密码";
 80
 81            }
 82
 83        }
 84    }
 85    protected void register_Click(object sender, ImageClickEventArgs e)
 86    ...{
 87        Response.Redirect("Register.aspx");
 88    }
 89    protected void DataList1_ItemDataBound(object sender, DataListItemEventArgs e)
 90    ...{
 91        
 92
 93        if (e.Item.ItemType == ListItemType.Footer)
 94        ...{
 95            ImageButton linkpre = (ImageButton)e.Item.FindControl("linkpre");
 96            ImageButton linknext = (ImageButton)e.Item.FindControl("linknext");
 97            DropDownList ddl = (DropDownList)e.Item.FindControl("DropDownList1");
 98            Label all = (Label)e.Item.FindControl("all");
 99            Label now = (Label)e.Item.FindControl("now");
100            linknext.Enabled = false;
101            linkpre.Enabled = false;
102
103            int newpageIndex;
104            if (!Page.IsPostBack)
105            ...{
106                newpageIndex = 0;//第一次加载时为第一页
107              
108            }
109            else
110            ...{
111                if (result == null)//如果回调参数为空
112                    Session["page"] = 0;//session保存当前页面号
113                else
114                ...{　　//由于回调结果在绑定事件之前　所以设置回调后的页面　保存在session中
115                    string[] parts = result.Split('|');
116                    string n = parts[1];
117                    Session["page"] = n;
118                }
119                newpageIndex = Convert.ToInt32(Session["page"]); // 取出当前页面
120            } 
121
122                if (newpageIndex > 0)
123                ...{
124                    linkpre.Enabled = true;
125                    //设置回调事件
126                    linkpre.Attributes.Add("onclick", "setpageto(" + (newpageIndex-1).ToString() + ");return false;");
127                }
128                if (newpageIndex < pds().PageCount - 1)
129                ...{
130
131                    linknext.Enabled = true;
132                    //设置回调事件
133                    linknext.Attributes.Add("onclick", "setpageto(" + (newpageIndex+1).ToString() + "); return  false;");
134                }
135
136
137
138                for (int i = 1; i <= pds().PageCount;i++ )
139                ...{
140                    ListItem item = new ListItem();
141                    item.Value = i.ToString();
142                    ddl.Items.Add(item);
143                }
144                   ddl.Text = (newpageIndex + 1).ToString();
145                    ddl.Attributes.Add("onchange", "setpageto1(this); return  false;");
146              
147               now.Text = pds(newpageIndex+1).CurrentPageIndex.ToString();
148               all.Text = pds().PageCount.ToString();  
149
150              
151           
152           
153
154        }
155
156
157    }
158
159  
160
161    //返回一个可分页的数据源
162    public PagedDataSource pds()
163    ...{
164        PagedDataSource pds = new PagedDataSource();
165
166        DataVisit mydv = new DataVisit();
167        string category=Request.QueryString["category"];
168        switch (category)
169        ...{
170            case "1": category = "动作";
171                break;
172            case "2": category = "爱情";
173                break;
174            case "3": category = "科幻";
175                break;
176            case "4": category = "卡通";
177                break;
178            case "5": category = "其他";
179                break;
180            case "6": category = "剧情";
181                break;
182            case "7": category = "喜剧";
183                break;
184            case "8": category = "恐怖";
185                break;
186            case "9": category = "大片";
187                break;
188            case "10": category = "战争";
189                break;
190            case "11": category = "美国";
191                break;
192            case "12": category = "香港台湾";
193                break;
194            case "13": category = "韩国";
195                break;
196            case "14": category = "中国内地";
197                break;
198            case "15": category = "其他地区";
199                break;
200
201        }
202        DataTable mydt = mydv.getCategory(category) ;
203        pds.DataSource = mydt.DefaultView;
204        pds.AllowPaging = true;
205        int size =12;
206        pds.PageSize = size;
207        pds.CurrentPageIndex = pds.CurrentPageIndex;
208        return pds;
209   }
210   //根据一个传来的整数作为当前页码并返回分页后的数据员
211    public PagedDataSource pds(int n)
212    ...{
213        PagedDataSource pds = new PagedDataSource();
214
215        DataVisit mydv = new DataVisit();
216        string category=Request.QueryString["category"];
217        switch (category)
218        ...{
219            case "1": category = "动作";
220                break;
221            case "2": category = "爱情";
222                break;
223            case "3": category = "科幻";
224                break;
225            case "4": category = "卡通";
226                break;
227            case "5": category = "其他";
228                break;
229            case "6": category = "剧情";
230                break;
231            case "7": category = "喜剧";
232                break;
233            case "8": category = "恐怖";
234                break;
235            case "9": category = "大片";
236                break;
237            case "10": category = "战争";
238                break;
239            case "11": category = "美国";
240                break;
241            case "12": category = "香港台湾";
242                break;
243            case "13": category = "韩国";
244                break;
245            case "14": category = "中国内地";
246                break;
247            case "15": category = "其他地区";
248                break;
249
250        }
251        DataTable mydt = mydv.getCategory(category);
252
253        pds.DataSource = mydt.DefaultView;
254        pds.AllowPaging = true;
255        int size = 12;
256        pds.PageSize = size;
257        pds.CurrentPageIndex = n;
258        return pds;
259    }
260
261    //绑定DataList
262    public void bind(int n)
263    ...{
264        DataList1.DataSource = pds(n);
265        DataList1.DataBind();
266
267    }
268
269
270
271
272
273    //回调方法
274    public string result;
275    public string GetCallbackResult()
276    ...{
277        string[] parts = result.Split('|');
278        //搜索名为MethodName的方法
279        MethodInfo method = this.GetType().GetMethod(parts[0]);
280
281        //定义一个object数组用来保存参数
282        object[] args = new object[parts.Length - 1];
283        Array.Copy(parts, 1, args, 0, args.Length);
284
285        return (string)method.Invoke(this, args);
286       
287        
288    }
289    public void RaiseCallbackEvent(string eventArgument)
290    ...{
291        result = eventArgument;
292    }
293    public string pageChange(string newIndex)
294    ...{
295
296        int n = Convert.ToInt32(newIndex);
297        bind(n);
298        return getRenderCode();
299    }
300 
301    public string getRenderCode()
302    ...{
303        StringWriter write1 = new StringWriter(CultureInfo.InvariantCulture);
304        HtmlTextWriter write2 = new HtmlTextWriter(write1);
305
306        DataList1.RenderControl(write2);
307        write2.Flush();
308        write2.Close();
309
310        return write1.ToString();
311    
312    }
313
314}