我在asp.net C＃中制作电子邮件客户端。在其中，GridView不会获取超过5行的数据。我的邮箱里有250封邮件。但GridView没有显示该数据。它最多只显示5行，然后在GridView中显示5到6行数据。
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="CS.aspx.cs" Inherits="CS" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js">
</script>
<script src="http://ajax.aspnetcdn.com/ajax/jquery.ui/1.8.9/jquery-ui.js" type="text/javascript">
</script>
<link href="http://ajax.aspnetcdn.com/ajax/jquery.ui/1.8.9/themes/start/jquery-ui.css"
rel="stylesheet" type="text/css"
/>
<script type="text/javascript">
$("[id*=lnkView]").live("click", function () {
var subject = $(this).text();
var row = $(this).closest("tr");
$("#body").html($(".body", row).html());
$("#attachments").html($(".Attachments", row).html());
$("#dialog").dialog({
title: subject,
buttons: {
Ok: function () {
$(this).dialog('close');
}
}
});
return false;
});
</script>
</head>
<body style="font-family: Arial; font-size: 10pt">
<form id="form1" runat="server">
<asp:GridView ID="gvEmails" runat="server" OnRowDataBound="OnRowDataBound" DataKeyNames="MessageNumber"
AutoGenerateColumns="false">
<Columns>
<asp:BoundField HeaderText="From" DataField="From" HtmlEncode="false" />
<asp:TemplateField HeaderText="Subject">
<ItemTemplate>
<asp:LinkButton ID="lnkView" runat="server" Text='<%# Eval("Subject") %>' />
<span class="body" style="display: none">
<%# Eval("Body") %></span>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField HeaderText="Date" DataField="DateSent" />
<asp:TemplateField ItemStyle-CssClass="Attachments">
<ItemTemplate>
<asp:Repeater ID="rptAttachments" runat="server">
<ItemTemplate>
<asp:LinkButton ID="lnkAttachment" runat="server" OnClick="Download" Text='<%# Eval("FileName") %>' />
</ItemTemplate>
<SeparatorTemplate>
<br>
</SeparatorTemplate>
</asp:Repeater>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
<div id="dialog" style="display: none">
<span id="body"></span>
<br />
<span id="attachments"></span>
</div>
</form>
</body>
</html>
代码背后：
public partial class CS : System.Web.UI.Page
{
protected List<Email> Emails
{
get { return (List<Email>)ViewState["Emails"]; }
set { ViewState["Emails"] = value; }
}
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
this.Read_Emails();
}
}
private void Read_Emails()
{
Pop3Client pop3Client;
if (Session["Pop3Client"] == null)
{
pop3Client = new Pop3Client();
pop3Client.Connect("pop.gmail.com", 995, true);
pop3Client.Authenticate("example@gmail.com", "password", AuthenticationMethod.TryBoth);
Session["Pop3Client"] = pop3Client;
}
else
{
pop3Client = (Pop3Client)Session["Pop3Client"];
}
int count = pop3Client.GetMessageCount();
this.Emails = new List<Email>();
int counter = 0;
for (int i = count; i >= 1; i--)
{
Message message = pop3Client.GetMessage(i);
Email email = new Email()
{
MessageNumber = i,
Subject = message.Headers.Subject,
DateSent = message.Headers.DateSent,
From = string.Format("<a href = 'mailto:{1}'>{0}</a>", message.Headers.From.DisplayName, message.Headers.From.Address),
};
MessagePart body = message.FindFirstHtmlVersion();
if (body != null)
{
email.Body = body.GetBodyAsText();
}
else
{
body = message.FindFirstPlainTextVersion();
if (body != null)
{
email.Body = body.GetBodyAsText();
}
}
List<MessagePart> attachments = message.FindAllAttachments();
foreach (MessagePart attachment in attachments)
{
email.Attachments.Add(new Attachment
{
FileName = attachment.FileName,
ContentType = attachment.ContentType.MediaType,
Content = attachment.Body
});
}
this.Emails.Add(email);
counter++;
if (counter > count)
{
break;
}
gvEmails.DataSource = this.Emails;
gvEmails.DataBind();
}
//gvEmails.DataSource = this.Emails;
//gvEmails.DataBind();
}
protected void OnRowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
Repeater rptAttachments = (e.Row.FindControl("rptAttachments") as Repeater);
List<Attachment> attachments = this.Emails.Where(email => email.MessageNumber == Convert.ToInt32(gvEmails.DataKeys[e.Row.RowIndex].Value)).FirstOrDefault().Attachments;
rptAttachments.DataSource = attachments;
rptAttachments.DataBind();
}
}
protected void Download(object sender, EventArgs e)
{
LinkButton lnkAttachment = (sender as LinkButton);
GridViewRow row = (lnkAttachment.Parent.Parent.NamingContainer as GridViewRow);
List<Attachment> attachments = this.Emails.Where(email => email.MessageNumber == Convert.ToInt32(gvEmails.DataKeys[row.RowIndex].Value)).FirstOrDefault().Attachments;
Attachment attachment = attachments.Where(a => a.FileName == lnkAttachment.Text).FirstOrDefault();
Response.AddHeader("content-disposition", "attachment;filename=" + attachment.FileName);
Response.ContentType = attachment.ContentType;
Response.BinaryWrite(attachment.Content);
Response.End();
}
}
[Serializable]
public class Email
{
public Email()
{
this.Attachments = new List<Attachment>();
}
public int MessageNumber { get; set; }
public string From { get; set; }
public string Subject { get; set; }
public string Body { get; set; }
public DateTime DateSent { get; set; }
public List<Attachment> Attachments { get; set; }
}
[Serializable]
public class Attachment
{
public string FileName { get; set; }
public string ContentType { get; set; }
public byte[] Content { get; set; }
}