C# 保存文件到数据库

html

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="FileUploadDataSource.aspx.cs" Inherits="WebApplication1.FileUploadDataSource" %>

<!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>

    <style type ="text/css" >

        .fileList li{  margin-bottom :5px;}

    </style>

</head>

<body>

    <form id="form1" runat="server">

    <div>

        <asp:FileUpload ID="upFile" runat="server" />

        <asp:Button ID="Button1" runat="server"

            Text="上传" onclick="Button1_Click" />

    </div>

    <div>

        <asp:Repeater ID="Repeater1" runat="server" DataSourceID="Sqldatasource1">

        <HeaderTemplate >

            <ul class ="fileList">

        </HeaderTemplate>

        <ItemTemplate >

            <li>

                <asp:HyperLink ID="HyperLink1" runat="server" Text ='<%#Eval("FileName")%>' NavigateUrl ='<%#Eval("Id","~/FileHandler.ashx?id={0}") %>'>HyperLink</asp:HyperLink>

            </li>

        </ItemTemplate>

        <FooterTemplate >

            </ul>

        </FooterTemplate>

        </asp:Repeater>

    </div>

    <asp:sqldatasource ID="Sqldatasource1" runat="server"

    ConnectionString="Data Source=localhost;Initial Catalog=test;Integrated Security=True"

    ProviderName="System.Data.SqlClient" 

        InsertCommand="insert into Files(FileName,FileBytes)values(@FileName,@FileBytes)"

        SelectCommand="SELECT Files.* FROM Files">

        <InsertParameters>

            <asp:ControlParameter ControlID="upFile" Name="FileName"

                PropertyName="FileName" />

            <asp:ControlParameter ControlID ="upFile" Name ="FileBytes" PropertyName ="FileBytes" />

        </InsertParameters>

    </asp:sqldatasource>

    </form>

</body>

</html>

后台代码

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.IO;

namespace WebApplication1

{

    public partial class FileUploadDataSource : System.Web.UI.Page

    {

        protected void Page_Load(object sender, EventArgs e)

        {

        }

        protected void Button1_Click(object sender, EventArgs e)

        {

            if (upFile.HasFile)

            {

                if (CheckFileType(upFile.FileName))

                    Sqldatasource1.Insert();

            }

        }

        private bool CheckFileType(string fileName)

        {

            return (Path.GetExtension(fileName).ToLower() == ".doc" || Path.GetExtension(fileName).ToLower() == ".docx");

        }

    }

}

FileHandler处理页面

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Data.SqlClient;

using System.Data;

namespace WebApplication1

{

    /// <summary>

    /// FileHandler 的摘要说明

    /// </summary>

    public class FileHandler : IHttpHandler

    {

        public void ProcessRequest(HttpContext context)

        {

            context.Response.ContentType = "application/msword";

            string conString = "Data Source=localhost;Initial Catalog=test;Integrated Security=True";

            using (SqlConnection conn = new SqlConnection(conString))

            {

                string sql = "SELECT FileName, FileBytes  FROM Files where Id=@id \n";

                using (SqlCommand cmd = new SqlCommand(sql, conn))

                {

                    conn.Open();

                    cmd.Parameters.AddWithValue("@Id", context.Request["Id"]);

                    using (SqlDataAdapter adapter = new SqlDataAdapter(cmd))

                    {

                        DataTable dt = new DataTable();

                        adapter.Fill(dt);

                        if (dt.Rows.Count > )

                        {

                            byte[] fileBytes = (byte[])dt.Rows[]["FileBytes"];

                            string fileName = dt.Rows[]["FileName"].ToString();

                            context.Response.AddHeader("Content-Disposition", "attachment; filename=" + fileName);

                            context.Response.BinaryWrite(fileBytes);

                        }

                        else

                        {

                            context.Response.ContentType = "text/plain";

                            context.Response.Write("文件不存在");

                        }

                    }

                }

            }

        }

        public bool IsReusable

        {

            get

            {

                return false;

            }

        }

    }

}

表

CREATE TABLE [dbo].[Files](

    [Id] [int] IDENTITY(1,1) NOT NULL,

    [FileName] [nvarchar](50) NULL,

    [FileBytes] [varbinary](max) NULL,

 CONSTRAINT [PK_Files] PRIMARY KEY CLUSTERED

(

    [Id] ASC

)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]

) ON [PRIMARY]

巴特西

C# 保存文件到数据库

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