四．代碼：

（1） guestpost.aspx：

< %@ Page Language="C#" EnableSessionState="False" % >
< %@ Import Namespace="System" % >
< %@ Import Namespace="System.IO" % >
< %@ Import Namespace="System.Data" % >
< %-- 這些是本程序正常運(yùn)用所必須的名字空間 --% >

< html >
< head >
< title >歡迎來到我的留言簿< /title >
< script Language="C#" runat="server" >
///< summary >
/// 當(dāng)提交（submit）按鈕按下后，調(diào)要這個(gè)函數(shù)
///< /summary >
public void Submit_Click(Object sender, EventArgs e)
{
//保存數(shù)據(jù)的XML文件的路徑
//如果你的路徑和下面的不同，則請(qǐng)修改之
string dataFile = "db/guest.xml" ;

//運(yùn)用一個(gè)Try-Catch塊完成信息添加功能
try{
//僅當(dāng)頁面是有效的時(shí)候才處理它
if(Page.IsValid){

errmess.Text="" ;
//以讀的模式打開一個(gè)FileStream來訪問數(shù)據(jù)庫(kù)
FileStream fin;
fin= new FileStream(Server.MapPath(dataFile),FileMode.Open,
FileAccess.Read,FileShare.ReadWrite);
//建立一個(gè)數(shù)據(jù)庫(kù)對(duì)象
DataSet guestData = new DataSet();
//僅從數(shù)據(jù)庫(kù)讀取XML Schema
guestData.ReadXmlSchema(fin);
fin.Close();
//從數(shù)據(jù)集的Schema新建一個(gè)數(shù)據(jù)行
DataRow newRow = guestData.Tables[0].NewRow();
//用相應(yīng)值填寫數(shù)據(jù)行
newRow["Name"]=Name.Text;
newRow["Country"]=Country.Text;
newRow["Email"]=Email.Text;
newRow["Comments"]=Comments.Text;
newRow["DateTime"]=DateTime.Now.ToString();
//填寫完畢，將數(shù)據(jù)行添加到數(shù)據(jù)集
guestData.Tables[0].Rows.Add(newRow);
//為數(shù)據(jù)庫(kù)文件新建另一個(gè)寫模式的FileStream，并保存文件
FileStream fout ;
fout = new FileStream(Server.MapPath(dataFile),FileMode.Open,
FileAccess.Write,FileShare.ReadWrite);

guestData.WriteXml(fout, XmlWriteMode.WriteSchema);
fout.Close();
//隱藏當(dāng)前的面板
formPanel.Visible=false;
//顯示帶有感謝信息的面板
thankPanel.Visible=true;
}
}
catch (Exception edd)
{
//捕捉異常
errmess.Text="寫入XML文件出錯(cuò)，原因："+edd.ToString() ;
}
}
< /script >
< LINK href="mystyle.css" type=text/css rel=stylesheet >
< /head >
< body >
< %-- 包含一個(gè)頭文件：header.inc --% >
< !-- #Include File="header.inc" -- >
< br >
< h3 align="center" class="newsbody" >留言者信息< /h3 >
< br >
< asp:label id="errmess" text="" style="color:#FF0000" runat="server" / >
< asp:Panel id=formPanel runat=server >
< form runat="server" >
< table border="0" width="80%" align="Center" >
< tr >
< td class="newsheading" >< b >請(qǐng)?jiān)谖伊粞圆玖粝履鷮氋F的信息！！< /b >< /td >
< td class="newsheading" > < /td >
< /tr >
< tr class="newsbody" >
< td >姓名：< /td >
< td >< asp:textbox text="" id="Name" runat="server" / >
< asp:RequiredFieldValidator ControlToValidate=Name display=static
runat=server >
*< /asp:RequiredFieldValidator >< /td >< /tr >
< tr class="newsbody" >< td >國(guó)家：< /td >
< td >< asp:textbox text="" id="Country" runat="server"/ >
< asp:RequiredFieldValidator ControlToValidate=Country display=static
runat=server >
*< /asp:RequiredFieldValidator >< /td > < /tr >
< tr class="newsbody" >< td >E-Mail：< /td >
< td >< asp:textbox test="" id="Email" runat="server"/ >
< asp:RequiredFieldValidator ControlToValidate=Email display=static
runat=server >
*< /asp:RequiredFieldValidator >< asp:RegularExpressionValidator
runat="server"
ControlToValidate="Email"
ValidationExpression="[\w-]+@([\w-]+\.)+[\w-]+"
Display="Static"
Font-Name="verdana" Font-Size="10pt" >
請(qǐng)輸入一個(gè)格式正確的Email地址！< /asp:RegularExpressionValidator >< /td >
< /tr >< tr class="newsbody" >< td >留言：< /td >
< td >< asp:Textbox textmode=multiline id="Comments" columns="25"
rows="4" runat="server" / >< /td >< /tr >
< tr class="newsbody" >
< td colspan="2" >
< asp:Button class="newsheading" id="write" Text="Submit"
onClick="Submit_Click" runat="server"/ >< /td >< /tr >< /table >< /form >< /asp:Panel >

< asp:Panel id=thankPanel visible=false runat=server >
< p class="newsbody" align=center >< b >謝謝訪問我的留言簿！< /b >
< br >< a href="viewguestbook.aspx" >請(qǐng)點(diǎn)擊這里 < /a > 查看留言簿。
< /p >
< /asp:Panel >
< !-- #Include File="footer.inc" -- >
< /body >
< /html >