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B(.NET)基于ASP.NET的网络博客的设计与实现

第3.2节 用户管理首页userindex

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图3·3 用户管理首页图 paper51.com

用户管理首页为用户提供了各个管理功能的链接,如添加日志、管理日志、管理专题、个人信息修改、评论管理等,如图3.3所示。

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在HTML语言中A href="userlogmanage.aspx"target="_blank"提供了在新窗口中打开userlogmanage.aspx的链接,添加日志链接到的页面是useraddlog.aspx,分类管理链接到的页面是userclass.aspx,修改用户资料链接到的页面是userinfomodify.aspx。

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第3.3节 发表日志user_addlog.aspx paper51.com

(1)    动态加载系统分类、用户分类、表情 内容来自www.paper51.com

系统分类信息在表category中,加载的时候把所有的系统分类id和对应的类名作为一个list的项加入到控件中,用户分类在表userclass中,需要通过userid来筛选该分类是否当前登录用户的分类。

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具体实现如下所示:

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        IfNot IsPostBack Then 内容来自论文无忧网 www.paper51.com

                Fori = 1 To 8

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               Dim srcstr As String

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               srcstr = "myimage\emot\face" + i.ToString + ".gif"//添加表情 copyright paper51.com

               Dim a As New System.Web.UI.WebControls.ListItem

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               a.Value = srcstr 内容来自论文无忧网 www.paper51.com

               a.Text = "<img src='" + srcstr + "'>" paper51.com

               imagelist.Items.Add(a)

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           Next copyright paper51.com

           mycon.Open()

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           mycmd.CommandText = "select * from category"

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           dr = mycmd.ExecuteReader 内容来自论文无忧网 www.paper51.com

            Whiledr.Read paper51.com

               Dim a As New Web.UI.WebControls.ListItem

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               Dim a As New Web.UI.WebControls.ListItem

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               a.Value = dr.GetValue(2)

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               a.Text = dr.GetValue(0)

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               category.Items.Add(a)

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           End While

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           dr.Close()[17]

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           mycmd.Connection = mycon 内容来自www.paper51.com

           mycmd.CommandText = "select * from userclass where user_id ='" & Session("username") & "'"

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           dr = mycmd.ExecuteReader

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           userclass.Items.Clear()

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           While dr.Read

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               Dim a As New Web.UI.WebControls.ListItem

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               a.Value = dr.GetValue(3) paper51.com

               a.Text = dr.GetValue(0)

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               userclass.Items.Add(a) 内容来自www.paper51.com

           End While copyright paper51.com

           mycon.Close() copyright paper51.com

           dr.Close()

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        EndIf

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(2)    发表日志: 内容来自www.paper51.com

发表日志主要是在log基本表中添加一条日志记录,包括日志ID,标题,内容,发表人ID,所属系统分类ID,所属用户分类ID,发表时间,表情,是否隐藏,是否需要密码。 paper51.com

日志的ID需要遍历log基本表的日志ID,把最大的ID号加1,做为新日志的ID,而不是只统计当前的日志总数,因为日志可能被删掉。发表日志的时候需要判断标题、内容、系统分类是否为空,若为空则给出提示,不为空则对基本表进行插入操作,插入前需要将标题、内容、表情进行特殊字符的变换。具体实现代码如下:

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        If(Session("username") = "") Then 内容来自www.paper51.com

           Page.Response.Redirect("index.aspx")

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        EndIf

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        If logtitle.Text ="" Then '日志标题

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           Response.Write("<script language=vbscript>alert""日志标题不能为空""</script>") 内容来自论文无忧网 www.paper51.com

       ElseIf body.Text = "" Then '日志内容

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           Response.Write("<script language=vbscript>alert""日志内容不能为空""</script>")

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       ElseIf category.SelectedItem.Text = "请选择分类"Then  '日志内容 内容来自论文无忧网 www.paper51.com

           Response.Write("<script language=vbscript>alert""请选择系统分类""</script>") copyright paper51.com

        Else

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           mycmd.Connection = mycon http://www.paper51.com

           mycmd.CommandText = "select log_id from log" 内容来自论文无忧网 www.paper51.com

           Dim log_num As Integer

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           log_num = 1 copyright paper51.com

           dr = mycmd.ExecuteReader http://www.paper51.com

           While dr.Read 内容来自www.paper51.com

               If (dr.GetValue(0) > log_num) Then

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                   log_num = dr.GetValue(0) copyright paper51.com

               End If

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           End While

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           log_num =log_num + 1 内容来自www.paper51.com

           dr.Close() http://www.paper51.com

           Dim display_num As Integer

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           Dim subjectstr As String = logtitle.Text http://www.paper51.com

           Dim contentstr As String = body.Text

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           Dim imagesrc As String = imagelist.SelectedValue

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//特殊字符转换 内容来自www.paper51.com

           imagesrc = imagesrc.Replace("&", "&amp;") http://www.paper51.com

            ……

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           contentstr = contentstr.Replace(">", "&gt;") 内容来自www.paper51.com

           contentstr = contentstr.Replace(Chr(32), "&nbsp;") 内容来自论文无忧网 www.paper51.com

           category_id = CInt(category.SelectedItem.Value)

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            If(userclass.SelectedIndex = -1) Then copyright paper51.com

               class_id = 0 paper51.com

           Else

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               class_id = CInt(userclass.SelectedItem.Value) 内容来自论文无忧网 www.paper51.com

           End If

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           sql = "insert into log values(" & log_num &",'" & subjectstr & "','" & contentstr &"','" & Now & "','" &Session("username") & "'," & category_id &"," & class_id & ",'" & ispassword.Text &"',0,'" & hide.SelectedItem.Text & "','" &imagesrc & "')" paper51.com

           mycmd.CommandText = sql http://www.paper51.com

           mycmd.ExecuteNonQuery()

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           mycmd.CommandText= "update category set log_num=log_num+1  where category_id=" &category_id copyright paper51.com

           mycmd.ExecuteNonQuery() http://www.paper51.com

           If (class_id <> 0) Then

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 mycmd.CommandText = "updateuserclass  setlog_num=log_num+1  whereclass_id=" & class_id copyright paper51.com

               mycmd.ExecuteNonQuery() copyright paper51.com

           End If http://www.paper51.com

           mycon.Close()

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  Response.Write("<script language=vbscript>alert""发表日志成功""</script>")

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 Page.Response.Redirect("viewblog.aspx?username=" &Session("username")) copyright paper51.com

        EndIf

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图3·4 发表日志页面

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