Use AJAX technology to write a mini wall Web control

Beginner Ajax Soon, I write a small thing to make a study diary
Message board pictures are as follows:

Sample address: http://www.8dao.net/miniguest/

First, the Access database is used for ease of movement.
Database is simple, table guest, field has Id,name,content

To implement Ajax, it is convenient to use ASP.net Ajax 1.0 bate, which can be downloaded in http://ajax.asp.net.
When installed, open VS2005, create a new asp.net AJAX Enabled Web site project
To add a Web user control minigb.ascx inside, the control code is as follows:

<%@ control language= "C #" Classname= "MINIGB"%>
<%@ Import namespace= "System.Data.OleDb"%>
<%@ Import namespace= "System.Data"%>
<script runat= "Server" >

Private OleDbConnection conn = new OleDbConnection ("Provider=Microsoft.Jet.OLEDB.4.0;Data source=" + System.Web.HttpContext.Current.Server.MapPath ("Guest.mdb"));
private string dname = "Visitor";
public string Dname
{
Get
{
return dname;
}
Set
{
Dname = value;
}
}

protected void Button1_Click (object sender, EventArgs e)
{
if (TextBox1.Text.Trim ()!= "")
{
OleDbCommand comm = new OleDbCommand ("INSERT into guest (name,content) VALUES (' +dname+" ', ' "+ TextBox1.Text.Trim () +") " , conn);
Comm. ExecuteNonQuery ();
Listupdate ();
TextBox1.Text = "";
}
}
private void Listupdate ()
{
OleDbDataAdapter da = new OleDbDataAdapter ("SELECT Top 5 * out guest ORDER BY id DESC", conn);
DataSet ds = new DataSet ();
Da. Fill (DS);
Datalist1.datasource = ds;
Datalist1.databind ();
}
protected void Page_Load (object sender, EventArgs e)
{
Conn. Open ();
Listupdate ();
}
</script>
<style>
. Gtitle
{
width:200px;
Background-color: #464646;
Color: #FFFFFF;
font-size:14px;
height:20px;
padding:3px 0 0 10px;
Font-weight:bold;
Border-style:solid;
border-top-width:1px;
border-bottom-width:0px;
border-left-width:1px;
border-right-width:1px;
Border-color: #BBBBBB;
}
. Gbody
{
width:200px;
Border-style:solid;
border-top-width:0px;
border-bottom-width:0px;
border-left-width:1px;
border-right-width:1px;
Border-color: #BBBBBB;
padding:3px 5px 3px 5px;
}
. Gend
{
width:200px;
Border-style:solid;
border-top-width:0px;
border-bottom-width:1px;
border-left-width:1px;
border-right-width:1px;
Border-color: #BBBBBB;
padding:3px 5px 3px 5px;
}
. Gname
{
width:190px;
font-size:12px;
Color:blue;
}
. Gcontent
{
width:190px;
Word-break:break-all;
Color: #444444;
font-size:12px;
padding:3px 0 3px 0;
border-style:dotted;
border-top-width:0px;
border-bottom-width:1px;
border-left-width:0px;
border-right-width:0px;
Border-color: #BBBBBB;
}
</style>

<asp:scriptmanagerproxy id= "ScriptManagerProxy1" runat= "server"
</asp:scriptmanagerproxy>
<asp:updatepanel id= "UpdatePanel1" runat= "server"
<contenttemplate>
<div class= "Gtitle" > <asp:label id= "Label1" runat= "Server" text= "message board" ></ASP:LABEL></DIV>
<div class= "Gbody" > <asp:datalist id= "DataList1" runat= "server"
<itemtemplate>
<div class= "Gname" ><%# DataBinder.Eval (Container.DataItem, "name")%> said: </div><div class= "Gcontent" ><%# DataBinder.Eval ( Container.DataItem, "content")%></div>
</itemtemplate>
</asp:DataList></div>
<div class= "Gend" ><asp:textbox id= "TextBox1" runat= "Server" width= "150px"/>
<asp:button id= " Button1 "runat=" "Server" text= "message" onclick= "Button1_Click"/></DIV>
</contenttemplate>
</ Asp:updatepanel>

This completes the control and then calls the control on the page, and the page that calls the control must have a ScriptManager control to use.

This control can be modified as an article comment control, plus a: more ... , the comment is available by the article ID.

Beginner Ajax, do an application, as a learning log. Also hope to teach more.
Http://www.cnblogs.com/aowind/archive/2006/11/21/567157.html