老是找不到合适的数据库上传下载的，从网上找了一些代码，改写了个可以直接使用的版本！
代码
AttachmentId bigint Unchecked
AttachmentName nvarchar(50) Unchecked
AgencyName nvarchar(50) Checked
ClassName nvarchar(255) Checked
TypeName nvarchar(50) Checked
Image image Checked
Flag int Checked
Notes text Checked
Unchecked
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Attachment.aspx.cs" Inherits="hrootCIS.DataShow.Types.NewNavigator.Attachment" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>
<!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 id="Head1" runat="server">
<title>附件信息</title>
<link href ="http://www.cnblogs.com/../Styles/AjaxTookitStyle.css" type="text/css" rel="stylesheet" />
</head>
<body>
<form id="form1" runat="server">
<div style="height: 1882px; width: 1200px">
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<cc1:TabContainer ID="TabContainer1" runat="server" ActiveTabIndex="0"
Height="1616px" >
<cc1:TabPanel runat="server" HeaderText="添加附件信息" ID="TabPanel1">
<HeaderTemplate>
添加附件信息
</HeaderTemplate>
<ContentTemplate>
<div>
<asp:Label ID="lblPoistion" runat="server" Text="附件："></asp:Label>
<input id="UpFile" runat="server" name="File1"
type="file" /><br />
<br />
<br />
<table>
<tr>
<td>选择公司：</td>
<td><asp:DropDownList ID="dplAgencyA" runat="server"
DataSourceID="SqlDataSourceAgencyA" DataTextField="AgencyName"
DataValueField="Agencyid"></asp:DropDownList><asp:SqlDataSource ID="SqlDataSourceAgencyA" runat="server"
ConnectionString="<%$ ConnectionStrings:mvcNewsConnectionString %>"
SelectCommand="SELECT * FROM [Agency]"></asp:SqlDataSource></td></tr>
<tr>
<td>附件所属类别:</td>
<td> <asp:DropDownList ID="dplClass" runat="server">
<asp:ListItem>企业研究报告</asp:ListItem>
<asp:ListItem>广告投放信息</asp:ListItem>
<asp:ListItem>媒体曝光信息</asp:ListItem>
<asp:ListItem>行业调研报告</asp:ListItem>
</asp:DropDownList>
</td>
</tr>
<tr>
<td>附件简介</td>
<td>
<asp:TextBox ID="txtNotes" runat="server" Height="81px" TextMode="MultiLine"
Width="273px"></asp:TextBox> </td>
</tr>
</table>
<asp:Button ID="btnUpLoad" runat="server" Text="上传附件"
onclick="btnUpLoad_Click" />
</div>
</ContentTemplate>
</cc1:TabPanel>
<cc1:TabPanel ID="TabPanel2" runat="server" HeaderText="管理">
<HeaderTemplate >
管理附件信息
</HeaderTemplate>
<ContentTemplate >
<table cellpadding="0" cellspacing="0" style="height: 30px" width="98%"><tr><td><asp:DropDownList ID="DropDownList1" runat="server"
DataSourceID="SqlDataSourceAgencyB" DataTextField="AgencyName"
DataValueField="Agencyid"></asp:DropDownList><asp:SqlDataSource ID="SqlDataSourceAgencyB" runat="server"
ConnectionString="<%$ ConnectionStrings:mvcNewsConnectionString %>"
SelectCommand="SELECT * FROM [Agency]"></asp:SqlDataSource></td></tr><tr><td>
<asp:Button
ID="BtnShowAttachment" runat="server" Text="显示所选公司的附件信息"
onclick="BtnShowAttachment_Click" BorderStyle="Outset"
BorderWidth="1px" /></td></tr><tr><td align="center"><asp:GridView ID="gdvAttachment" runat="server" AutoGenerateColumns="False"
Width="400px" CellPadding="4" ForeColor="#333333" GridLines="None"><AlternatingRowStyle BackColor="White" /><Columns><asp:TemplateField
HeaderText="ID" Visible="False"><ItemTemplate><asp:Label ID="lblId"
runat="server" Text="<%#Bind('AttachmentId') %>"></asp:Label></ItemTemplate></asp:TemplateField><asp:TemplateField><ItemTemplate><%#Eval("AttachmentName")%></a></ItemTemplate></asp:TemplateField><asp:TemplateField HeaderText="选项"><ItemTemplate><asp:CheckBox ID="chkDelete" runat="server" /></ItemTemplate></asp:TemplateField><asp:TemplateField></asp:TemplateField></Columns><EditRowStyle BackColor="#2461BF" /><FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" /><HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" /><PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" /><RowStyle BackColor="#EFF3FB" /><SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" /></asp:GridView></td></tr><table><tr><td><asp:Button ID="btnDelete" runat="server" OnClick="btnDelete_Click" Text="删除" /></td></tr></table></table>
</ContentTemplate>
</cc1:TabPanel>
<cc1:TabPanel ID="TabPanel3" runat="server" HeaderText="下载附件">
<HeaderTemplate >
下载附件
</HeaderTemplate>
<ContentTemplate >
<asp:GridView ID="gdvAttachmentA" runat="server" AutoGenerateColumns="False"
DataSourceID="SqlDataSourceAttachment"
onrowcommand="gdvAttachmentA_RowCommand" DataKeyNames="AttachmentId">
<Columns >
<asp:BoundField DataField="AttachmentName" HeaderText="文件名称"
SortExpression="AttachmentName" />
<asp:BoundField DataField="ClassName" HeaderText="ClassName"
SortExpression="ClassName" />
<asp:TemplateField>
<ItemTemplate>
<asp:LinkButton ID="lbtnDownload" runat="server" CommandName="download" CommandArgument='<%#Eval("AttachmentName") %>'>下载</asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSourceAttachment" runat="server"
ConnectionString="<%$ ConnectionStrings:mvcNewsConnectionString %>"
SelectCommand="SELECT AttachmentId,AttachmentName,ClassName FROM [Attachment]"></asp:SqlDataSource>
</ContentTemplate>
</cc1:TabPanel>
</cc1:TabContainer>
</div>
</form>
</body>
</html>