用asp.net写的论坛程序

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用asp.net写的论坛程序

这是一个用asp.net写的论坛程序，虽然简单但可以运行。

这个程序的编程思想其实还是基本延续了asp的方式，如果让那只大鸟儿看见可能要嘘之以鼻。但实际上这种方式对于asp程序向asp.net的快速移植还是有用的。如果你对这种移植不屑那也没办法，这个贴子就算给asp.net刚入门的小虾们开开眼。

这个例子包含3部分

1）forum.aspx-论坛主页。

2）reply.aspx-当在论坛主页中点击一个贴子时调用，显示贴子详细内容。

3）postmessage.aspx-上贴时调用，将内容保存入数据库

数据库结构   Table - newpost :This table will contain the New Topic posted messages
postid (primary key)  The unique id for each new topic.
name The name of the author of the message.
email E-mail address of the author.
subject Subject of the message.
ip IP address of the author.
date Date / Time of the Post
message Message posted.
replies Number of replies to the post (if any)
views Number of times the message has been viewed.

Table - reply :This table will contain the Replies made to the new topics.
replyid (primary key) The unique id for each reply.
name Name of the author.
email E-mail address of the author.
subject Subject of the post
ip IP of the author.
date Date / Time of post.
message Message posted.
postid postid from the "newpost" table for which this message is a reply.

用asp.net写的论坛程序--论坛主页

1) forum.aspx :- The main forum page

<%@ Page Language="C#" Debug="true" %>
<%@ Assembly Name="System.Data" %>
<%@ Import Namespace="System.Data.ADO" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System" %>
<html><head>
<title>Welcome to My Forum!</title>
<script language="C#" runat="server" >
//execute this script when the page loads
void Page_Load(Object Src, EventArgs E)
{
//Call the Method to DataBind the DataGrid
Binding() ;
}
//This Method Connects to the Database, and DataBinds the Database to the DataGrid
public void Binding()
{
//String to connect to the database, If your Database is in some other directory then change the path
//To the Database below
string strConn=@"Provider=Microsoft.Jet.OLEDB.4.0 ;Data Source="+Server.MapPath(".\\db\\board.mdb") ;
//Make a Connection to the Database
ADOConnection myConn = new ADOConnection(strConn) ;
//String to select records from the Database. newpost Table
//I have used "ORDER BY postid DESC" since I want to show the latest post on the top
//If you remove this clause then the oldest message will be shown first
string strCom = "SELECT postid ,subject ,name ,replies ,views ,date FROM newpost ORDER BY postid DESC" ;
//Open the Connection, Always remember to Open the connection before doing anything else
myConn.Open();
DataSet myDataSet = new DataSet();
//Create a ADODataSetCommand and a DataSet
ADODataSetCommand myCommand =new ADODataSetCommand(strCom,myConn);
//Fill the DataSet
myCommand.FillDataSet(myDataSet,"newpost") ;
//Connection is closed
myConn.Close();
//Set the DataView of the Table "newpost" contained in the DataSet for the DataGrid
DataGrid1.DataSource = myDataSet.Tables["newpost"].DefaultView ;
//DataBind the DataGrid
DataGrid1.DataBind();
}
//This method is called when the DataGrid is Paged (i.e. when you change from Page 1 to Page 2 etc.. )
public void DataGrid_Updt(Object sender, DataGridPageChangedEventArgs e)
{
//Call the Method to Databind
Binding();
}
//This Method is called when the form is submitted to make a new Post
public void Submit_Click(Object sender, EventArgs e)
{
//proceed only if all the required fields are filled-in
if(Page.IsValid&&name.Text!=""&&subject.Text!=""&&email.Text!=""){
//Get the Current Date and Time
DateTime now = DateTime.Now ;
errmess.Text="" ;
//I am building a custom query which will be used to call the postmessage.aspx page.
//Since it will be a query we have to encode the query into UTF8 format.
//So I get all the fields from the form and encode them into UTF8 format
string req = "name="+ System.Web.HttpUtility.UrlEncodeToString(name.Text, System.Text.Encoding.UTF8);
req+="&&email="+ System.Web.HttpUtility.UrlEncodeToString(email.Text, System.Text.Encoding.UTF8);
req+="&&subject="+ System.Web.HttpUtility.UrlEncodeToString(subject.Text, System.Text.Encoding.UTF8);
//Get the HostAddress of the Author
req+="&&ip="+ System.Web.HttpUtility.UrlEncodeToString(Request.UserHostAddress.ToString(), System.Text.Encoding.UTF8);
req+="&&date="+ System.Web.HttpUtility.UrlEncodeToString(now.ToString(), System.Text.Encoding.UTF8);
req+="&&message="+ System.Web.HttpUtility.UrlEncodeToString(message.Text, System.Text.Encoding.UTF8);
//A 'yes' is used below to tell the postmessage page that this is a new topic post
req+="&&newpost="+ System.Web.HttpUtility.UrlEncodeToString("yes", System.Text.Encoding.UTF8);
//call the postmessage.aspx page and append the query to it.
Page.Navigate("postmessage.aspx?" + req);
}
else
{
errmess.Text="Fill in all the Required Fields before Posting!<br>" ;
}
}
</script>
<LINK href="mystyle.css" type=text/css rel=stylesheet></head>
<body topmargin="0" leftmargin="0" rightmargin="0" marginwidth="0" marginheight="0">

<center>
<asp:label id="errmess" text="" style="COLOR:#ff0000" runat="server" />
<asp:Label class=fodark text="<font color=#00000 >Welcome to My Discussion Forum</font>" runat=server />
<br>
<br>
<form method="post" runat="server" ID=Form1>
<%-- The DataGrid settings. Its very interesting how much you can play with it --%>
<asp:DataGrid id=DataGrid1 runat="server" ForeColor="Black"
PagerStyle-Mode="NumericPages"
OnPageIndexChanged="DataGrid_Updt" PageSize="20" AllowPaging="True" width="80%" autogeneratecolumns="False">
<property name="PagerStyle">
<asp:DataGridPagerStyle BackColor="Coral" Mode="NumericPages">
</asp:DataGridPagerStyle>
</property>

<property name="AlternatingItemStyle">
<asp:TableItemStyle BorderColor="#FFC080" BackColor="#FF9966">
</asp:TableItemStyle>
</property>

<property name="FooterStyle">
<asp:TableItemStyle ForeColor="White" BackColor="DarkOrange">
</asp:TableItemStyle>
</property>

<property name="ItemStyle">
<asp:TableItemStyle BackColor="Moccasin">
</asp:TableItemStyle>
</property>

<property name="HeaderStyle">
<asp:TableItemStyle Font-Bold="True" ForeColor="White" BackColor="Coral">
</asp:TableItemStyle>
</property>
<%-- I am setting up the Individual columns myself using Templates --%>
<property name="Columns">
<%-- Manipulate the subject entry so that it contains a link to the reply page --%>
<asp:TemplateColumn HeaderText="Subject" itemstyle-width=50%>
<template name="ItemTemplate" >
<asp:Label runat="server" Text='<%#"<a href=reply.aspx?postid="+DataBinder.Eval(Container, "DataItem.postid")+">"
+DataBinder.Eval(Container, "DataItem.subject")+"</a>" %>' ID=Label2></asp:Label>
</template>
</asp:TemplateColumn>

<asp:TemplateColumn HeaderText="Author Name" itemstyle-width=20%>
<template name="ItemTemplate">
<asp:Label runat="server" Text='<%# DataBinder.Eval(Container, "DataItem.name") %>' ID=Label3></asp:Label>
</template>
</asp:TemplateColumn>

<asp:TemplateColumn HeaderText="Replies" itemstyle-width=10%>
<template name="ItemTemplate">
<asp:Label runat="server" width=10% Text='<%# DataBinder.Eval(Container, "DataItem.replies") %>' ID=Label4>
</asp:Label>
</template>
</asp:TemplateColumn>

<asp:TemplateColumn HeaderText="Views" itemstyle-width=10%>
<template name="ItemTemplate">
<asp:Label runat="server" width=10% Text='<%# DataBinder.Eval(Container, "DataItem.views") %>' ID=Label5>
</asp:Label>
</template>
</asp:TemplateColumn>

<asp:TemplateColumn HeaderText="Date of Post" itemstyle-width=10%>
<template name="ItemTemplate">
<asp:Label runat="server" width=10% Text='
<%# DataBinder.Eval(Container, "DataItem.date").ToString().ToDateTime().ToShortDateString() %>' ID=Label6>
</asp:Label>

</template>
</asp:TemplateColumn>
</property>
</asp:DataGrid>
<br>
<br>
<asp:Label class=fodark text="<font color=#00000 >Post New Topic</font>" runat=server />
<br>
<table border="0" width="80%" align="center">
<tr >
<td class="fohead" colspan=2><b>Post New Topic</b></td>
</tr>
<tr class="folight" >
<td>Name :</td>
<td ><asp:textbox text="" id="name" runat="server" />   <font color=#ff0000>*</font></td>
</tr>
<tr class="folight">
<td>E-Mail :</td>
<td><asp:textbox text="" id="email" runat="server"/>   <font color=#ff0000>*</font></td>
</tr>
<tr class="folight">
<td> Subject:</td>
<td><asp:textbox test="" id="subject" width=200 runat="server"/>   <font color=#ff0000>*</font>
</td></tr>
<tr class="folight">
<td>Message :</td>
<td>
<asp:TextBox id=message runat="server"
Columns="30" Rows="15" TextMode="MultiLine"></asp:TextBox></td>
</tr>
<tr class=folight>
<td colspan=2>
<asp:Button class=fodark id=write onClick=Submit_Click runat="server" Text="Submit"></asp:Button></td></tr>
</table>
</form>
</center>

</body></html>

用asp.net写的论坛程序--浏览贴子内容及回复

2) reply.aspx : The topic viewing and replying page

<%@ Page Language="C#" EnableSessionState="False" Debug="True" %>
<%@ Import Namespace="System" %>
<%@ Assembly Name="System.Data" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.ADO" %>
<html><head>
<title>Post New Topic.</title>
<%-- These are the imported assemblies and namespaces needed --%>
<script Language="C#" runat="server">
DataSet ds ,rs;
DataRow dr ;
string postid ;
public void Page_Load(object sender , EventArgs e)
{
//Check if the page is Post Back
if(!Page.IsPostBack)
{
//Get the postid from the Query string
postid = Request.Params["postid"] ;
if(postid!=null)
{
//Database connection string. Change the path to the database file if you have some other path where
//you are saving your Database file
string strConn=@"Provider=Microsoft.Jet.OLEDB.4.0 ;Data Source="+Server.MapPath(".\\db\\board.mdb") ;
//Make a connection to the Database
ADOConnection myConn = new ADOConnection(strConn) ;
//string to select the records from the newpost table
string strCon ="SELECT subject, name, email, message ,date FROM newpost WHERE postid="+postid ;
//set a ADODataSetCommand
ADODataSetCommand myCommand =new ADODataSetCommand(strCon,myConn);
ds = new DataSet();
//Don't ever forget to open the Connection
myConn.Open();
//Fill the DataSet
myCommand.FillDataSet(ds,"newpost") ;
//Get the Row at position '0' and store it in a DataRow object
//Why row at position '0' ? Since there can only be one record with the given postid remember !!
//Why put into a DataRow ? Its easy to access data from a DataRow
dr = ds.Tables["newpost"].Rows[0] ;
//Get the "subject" from the DataRow and set it up in the post reply form's subject field
subject.Text="Re:"+dr["subject"].ToString() ;
//Select the replies to the post from the reply table
strCon ="SELECT name , email, subject, message ,date FROM reply WHERE postid="+postid ;
//Make a new ADODataSetCommand and DataSet for the reply table
ADODataSetCommand myCommand2 =new ADODataSetCommand(strCon,myConn);
rs = new DataSet() ;
//fill the DataSet
myCommand2.FillDataSet(rs, "reply") ;
//Code to update the "views" field for the newpost Table
//Select the views field from the table for a given postid
strCon ="SELECT views FROM newpost WHERE postid = "+postid ;
//Make a ADOCommand here since we want a ADODataReader later
ADOCommand vicomm = new ADOCommand(strCon, myConn) ;
ADODataReader reader ;
//execute the statement and create a ADODataReader
vicomm.Execute(out reader) ;
//Read the First record (there can only be one record remember !)
reader.Read() ;
//Get a "Int32" value from the first Column (we have one column in the reader, check the select statement above)
int i = reader.GetInt32(0) ;
//Increase the views count
i++ ;
reader.Close() ;
//Update the newpost table with the new views value
strCon ="UPDATE newpost SET views = "+i+" WHERE (postid= "+postid+")" ;
//since we are using the same ADOCOmmand object for this statement too to set the CommandText property
vicomm.CommandText = strCon ;
//Since this statement will result in no output we use "ExecuteNonQuery()" method
vicomm.ExecuteNonQuery() ;
//close the connection
myConn.Close();
}
}
}
// This method is called when the submit button is clicked
public void Submit_Click(Object sender, EventArgs e)
{
//Get the postid
postid = Request.Params["postid"] ;

//proceed only if all the required fields are filled-in
if(Page.IsValid&&name.Text!=""&&subject.Text!=""&&email.Text!=""){
DateTime now = DateTime.Now ;
errmess.Text="" ;
//We have to call the postmessage.aspx page with a query to post the data to the Database.
//Hence we have to first build the custom query from the Data posted by the user
//also since we are using a query we have to encode the data into UTF8 format
string req = "name="+ System.Web.HttpUtility.UrlEncodeToString(name.Text, System.Text.Encoding.UTF8);
req+="&&email="+ System.Web.HttpUtility.UrlEncodeToString(email.Text, System.Text.Encoding.UTF8);
req+="&&subject="+System.Web.HttpUtility.UrlEncodeToString(subject.Text, System.Text.Encoding.UTF8);
req+="&&ip="+System.Web.HttpUtility.UrlEncodeToString(Request.UserHostAddress.ToString(), System.Text.Encoding.UTF8);
req+="&&date="+ System.Web.HttpUtility.UrlEncodeToString(now.ToString(), System.Text.Encoding.UTF8);
req+="&&message="+ System.Web.HttpUtility.UrlEncodeToString(message.Text, System.Text.Encoding.UTF8);
//Encode "no" to indicate that the post is not a new post but its a reply to a earlier message
req+="&&newpost="+ System.Web.HttpUtility.UrlEncodeToString("no", System.Text.Encoding.UTF8);
req+="&&previd="+ System.Web.HttpUtility.UrlEncodeToString(postid, System.Text.Encoding.UTF8);
//Call the postmessage page with our custom query
Page.Navigate("postmessage.aspx?" + req);
}
else
{
errmess.Text="Fill in all the Required Fields !" ;
}
}
</script>
<LINK href="mystyle.css" type=text/css rel=stylesheet></head>
<body topmargin="0" leftmargin="0" rightmargin="0" marginwidth="0" marginheight="0">
<%-- Include a header file 'header.inc' --%>

<br>
<div align=center>
<table border=0 width=80% cellspacing=2>
<tr class=fohead><th width=20%>Author Name</th>
<th width=80%>Message</th></tr>
<%-- Below I am encapsulating the email of the author over the name of the author
so that when you click on the author a e-mail gets sent to him
Also I am geting the DateTime from the DataBase and Displaying the Date and Time separately --%>
<tr class=folight><td rowspan=2 align="center"><%= "<a href=mailto:"+dr["email"]+">"+dr["name"]+"</a>" %><br>
<font size=1><%= dr["date"].ToString().ToDateTime().ToShortDateString() %><br>
<%= dr["date"].ToString().ToDateTime().ToShortTimeString() %></font>
</td>
<td><b>Subject: </b><%=dr["subject"] %></td></tr>
<tr class=folight>
<td><pre><%=dr["message"] %></pre> </td>
</tr>
<%-- Get all the replies to the Original post and show them --%>
<% int no = rs.Tables["reply"].Rows.Count ;
if(no>0)
{
for(int j=0 ;j<no ; j++)
{
DataRow rd = rs.Tables["reply"].Rows[j] ;
%>
<tr class=fodark>
<td align="center"><%="<a href=mailto:"+rd["email"]+">"+rd["name"]+"</a>" %><br>
<font size=1><%= rd["date"].ToString().ToDateTime().ToShortDateString() %><br>
<%= rd["date"].ToString().ToDateTime().ToShortTimeString() %></font>
</td>
<td><pre><%=rd["message"] %></pre> </td>
</tr>
<%
}
}
%>
</table>
</div>
<h3 align="center" class="fodark"><a href=forum.aspx>Click Here</a> to go to back to Forum.
<br>Reply to the Above Post.</h3>
<br>
<asp:label id="errmess" text="" style="COLOR:#ff0000" runat="server" />
<form runat="server">
<table border="0" width="80%" align="center">
<tr >
<td class="fohead" colspan=2><b>Reply to the Post</b></td>
</tr>
<tr class="folight" >
<td>Name :</td>
<td ><asp:textbox text="" id="name" runat="server" />   <font color=#ff0000>*</font></td>
</tr>
<tr class="folight">
<td>E-Mail :</td>
<td><asp:textbox text="" id="email" runat="server"/>   <font color=#ff0000>*</font></td>
</tr>
<tr class="folight">
<td> Subject:</td>
<td><asp:textbox test="" id="subject" width=200 runat="server"/>   <font color=#ff0000>*</font>
</td></tr>
<tr class="folight">
<td>Message :</td>
<td>
<asp:TextBox id=message runat="server"
Columns="30" Rows="15" TextMode="MultiLine"></asp:TextBox></td>
</tr>
<tr class=folight>
<td colspan=2>
<asp:Button class=fodark id=write onClick=Submit_Click runat="server" Text="Submit"></asp:Button></td></tr>
</table>
</form><br>
<br>
</body></html>

用asp.net写的论坛程序--上贴保存

3) postmessage.aspx :- The page which saved data to the Database

<%@ Import Namespace="System" %>
<%@ Assembly Name="System.Data" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.ADO" %>
<%@ Page Language="C#" Debug="true" %>
<html>
<head>
<title>Thank You for Posting !</title>
<script language="C#" runat="server" >
//execute this script when the page loads
void Page_Load(Object Src, EventArgs E)
{
//if the page is called from another page
if (!Page.IsPostBack) {
//Get all the Parameters from the Query string
string name = Request.Params["name"] ;
string email = Request.Params["email"] ;
string subject = Request.Params["subject"] ;
string ip = Request.Params["ip"] ;
string date = Request.Params["date" ];
string message = Request.Params["message"] ;
bool newmess =true ;
string previd ="1";
//Check if the post is a New topic or a reply to a new topic
if(Request.Params["newpost"].Equals("no"))
{
//if its a reply then get the postid called as previd here
newmess =false ;
previd = Request.Params["previd"] ;
}
//If the post is a new topic then follow the below routine
if(newmess)
{
//The string for the path to the database , if your database is in some other
directory then edit the path
//of this variable
string strConn=@"Provider=Microsoft.Jet.OLEDB.4.0 ;Data Source=
"+Server.MapPath(".\\db\\board.mdb") ;
//Get a ADOConnection to the database
ADOConnection myConn = new ADOConnection(strConn) ;
//The SQL Select statement
string strCom = "Select postid from newpost" ;
//Create a ADOCommand since we want a ADODataReader later
ADOCommand myCommand =new ADOCommand(strCom,myConn);
//Open the connection
myConn.Open();
ADODataReader reader;
//Execute the command and get the Data into "reader"
myCommand.Execute(out reader) ;
int i=1 ;
//Get the current number of records present in the database.
while(reader.Read())
{
i++ ;
}
reader.Close() ;
//build the SQL statement to insert into the Database
string insertStr =" INSERT INTO newpost VALUES ("
+i +", '"
+name+"', '"
+email+"', '"
+subject+"', '"
+ip+"', '"
+date+"', '"
+message+"',0, 0)" ;
myCommand.CommandText =insertStr ;
//Since the SQL statement does not return any output use "ExecuteNonQuery() method
myCommand.ExecuteNonQuery() ;
//Close the connection
myConn.Close() ;
}
else
{
//If the posted data is a reply to a topic then follow the below procedure
//string for the path to the database, if your database is stored in some other directory then
//edit the path here
string strConn=@"Provider=Microsoft.Jet.OLEDB.4.0 ;Data Source="+
Server.MapPath(".\\db\\board.mdb") ;
ADOConnection myConn = new ADOConnection(strConn) ;
//SQL statement to select the replyid
string strCom = "Select replyid from reply" ;
//create a ADOCommand
ADOCommand myCommand =new ADOCommand(strCom,myConn);
//Open the Connection
myConn.Open();
ADODataReader reader;
//Execute the command and get the Data into "reader"
myCommand.Execute(out reader) ;
int i=1 ;
//Get the current number of records present in the database.
while(reader.Read())
{
i++ ;
}
reader.Close() ;
//Build a statement to insert the values into the reply table
string insertStr =" INSERT INTO reply VALUES ("
+i +", '"
+name+"', '"
+email+"', '"
+subject+"', '"
+ip+"', '"
+date+"', '"
+message+"', "
+previd+")";
myCommand.CommandText =insertStr ;
//ExecuteNonQuery - since the command does not return anything
myCommand.ExecuteNonQuery() ;
//string to get the replies column from the newpost table
string replyno = "SELECT replies FROM newpost WHERE postid ="+previd ;
myCommand.CommandText =replyno ;
//Execute command and get the reader
myCommand.Execute(out reader) ;
//read the first record (remember there can only be one record in the reader since postid is unique)
reader.Read();
//Get the "Int16" value of the number of replies from the replies column in the newpost table
int rep =reader.GetInt16(0) ;
reader.Close() ;
rep++ ;
//SQL statement to update the replies field in the newpost table
string updtStr ="UPDATE newpost SET replies = "+rep
+" WHERE (postid = "+previd+")" ;
myCommand.CommandText = updtStr;
//ExecuteNonQuerry why ?? I guess U should know by now !
myCommand.ExecuteNonQuery();
myConn.Close() ;
}
//get the different Parameters from the query string and store it
//to respective Labels
NameLabel.Text = name;
EmailLabel.Text= email ;
SubjectLabel.Text=subject;
MessageLabel.Text=message ;
}
else
{
//else display an error
errmess.Text="This Page Cannot be called directly. It has to be called from the Form posting page.<br>" ;
}
}
</script>
<LINK href="mystyle.css" type=text/css rel=stylesheet>
</head>
<body topmargin="0" leftmargin="0" rightmargin="0" marginwidth="0" marginheight="0">

<center>
<asp:label id="errmess" text="" style="color:#FF0000" runat="server" />
<h2 class="fodark"><b>Thank You , for posting on the Message Board.</b></h2>
<table align=center width="60%" border="0" cellspacing="2" cellpadding="1" >
<tr class="fohead"><td colspan="2">The information You Posted!</td></tr>
<tr class="folight">
<td>Name :</td>
<td><asp:label id="NameLabel" text="" runat="server" /></td>
</tr>
<tr class="folight">
<td>E-Mail :</td>
<td><asp:label id="EmailLabel" text="" runat="server" /></td>
</tr>
<tr class="folight">
<td>Subject :</td>
<td><asp:label id="SubjectLabel" text="" runat="server" /></td>
</tr>
<tr class="folight">
<td>Message :</td>
<td><asp:label id="MessageLabel" text="" runat="server" /></td>
</tr>
</table>
<br>
<h4 class="fodark"><a href="forum.aspx">Click here </a> to go back to the Forum.<br>
<%-- A little work to show the link to return back to the page if, the post was a reply --%>
<% if(Request.Params["previd"]!=null)
{ %>
<a href='reply.aspx?postid=<%=Request.Params["previd"] %>'> Click here </a>to go back
where you came from.
<% } %>
</h4>
</center>

</body>
</html>

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