ASP.NET2.0中将文件上传到数据库

Access数据库代码 
 

<% ...@ Page Language = " C# "  EnableViewState = " true "   %>

<% ...@ Import Namespace = " System.Data.OleDb "   %>
<! DOCTYPE html PUBLIC  " -//W3C//DTD XHTML 1.0 Transitional//EN "   " http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd " >

< script runat = " server " > ...

   protected   void  Button1_Click(  object  sender, EventArgs e )
  ... ... {
    System.IO.Stream fileDataStream = FileUpload1.PostedFile.InputStream;

    if (fileDataStream.Length < 1)
    ......{
      Msg.Text = "请选择文件。";
      return;
    }

    //得到文件大小
    int fileLength = FileUpload1.PostedFile.ContentLength;

    //创建数组
    byte[] fileData = new byte[fileLength];
    //把文件流填充到数组
    fileDataStream.Read(fileData, 0, fileLength);
    //得到文件类型
    string fileType = FileUpload1.PostedFile.ContentType;

    //构建数据库连接，SQL语句，创建参数
    string strCnn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("Image2Access.mdb");
    OleDbConnection myConnection = new OleDbConnection(strCnn);
    OleDbCommand command = new OleDbCommand("INSERT INTO Person (PersonName,PersonEmail,PersonSex,PersonImageType,PersonImage)" +
    "VALUES (@PersonName,@PersonEmail,@PersonSex,@PersonImageType,@PersonImage)", myConnection);

    command.Parameters.AddWithValue("@PersonName",TextBox1.Text);
    command.Parameters.AddWithValue("@PersonEmail", "[email protected]");
    command.Parameters.AddWithValue("@paramPersonSex", "男");
    command.Parameters.AddWithValue("@PersonImageType", fileType);
    command.Parameters.AddWithValue("@PersonImage", fileData);


    //打开连接，执行查询
    myConnection.Open();
    command.ExecuteNonQuery();
    myConnection.Close();
    Response.Redirect(Request.RawUrl);
  }


   protected   void  Page_Load(  object  sender, EventArgs e )
  ... ... {

    if (!Page.IsPostBack)
    ......{
      BindGrid();
    }
  }

   private   void  BindGrid( )
  ... ... {
    string strCnn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="
    + Server.MapPath("Image2Access.mdb");
    OleDbConnection myConnection = new OleDbConnection(strCnn);
    OleDbCommand myCommand = new OleDbCommand("SELECT * FROM Person", myConnection);

    try
    ......{
      myConnection.Open();
      GridView1.DataSource = myCommand.ExecuteReader(System.Data.CommandBehavior.CloseConnection);
      GridView1.DataBind();
    }
    catch (OleDbException SQLexc)
    ......{
      Response.Write("提取数据时出现错误：" + SQLexc.ToString());
    }
  }
   protected   string  FormatURL(  object  strArgument )
  ... ... {
    return "ReadImage.aspx?id=" + strArgument.ToString();
  }   

</ script >

< html xmlns = " http://www.w3.org/1999/xhtml " >
< head runat = " server " >
   < title > 上传文件到数据库 </ title >
</ head >
< body >
   < form id = " MengXianhui "  runat = " server " >
     < asp:GridView ID = " GridView1 "  runat = " server "  AutoGenerateColumns = " false " >
       < Columns >
         < asp:TemplateField >
           < ItemTemplate >
             <% ...#Eval( " PersonName " )  %>
           </ ItemTemplate >
         </ asp:TemplateField >
         < asp:TemplateField >
           < ItemTemplate >
             <% ...#Eval( " PersonEmail " )  %>
           </ ItemTemplate >
         </ asp:TemplateField >
         < asp:TemplateField >
           < ItemTemplate >
             <% ...#Eval( " PersonSex " )  %>
           </ ItemTemplate >
         </ asp:TemplateField >
         < asp:TemplateField >
           < ItemTemplate >
             < img src = " <%#FormatURL(Eval( " PersonID " )) %> "   /></ ItemTemplate >
         </ asp:TemplateField >
       </ Columns >
     </ asp:GridView >
     < br  />
     < br  />
    姓名： < asp:TextBox ID = " TextBox1 "  runat = " server " ></ asp:TextBox >
     < br  />
    照片： < asp:FileUpload ID = " FileUpload1 "  runat = " server "   />
     < asp:Button ID = " btnUpload "  runat = " server "  Text = " 上传 "  OnClick = " Button1_Click " ></ asp:Button >
     < p >
       < asp:Label ID = " Msg "  runat = " server "  ForeColor = " Red " ></ asp:Label ></ p >
   </ form >
</ body >
</ html >

SQL Server数据库代码
 

<%...@ Page Language="C#" EnableViewState="true" %>

<%...@ Import Namespace="System.Data.SqlClient" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server"> ...
  string strCnn = "Persist Security Info=False;User ID=sa;Password=;Initial Catalog=Book;Server=(local);" ;
  protected void Button1_Click( object  sender, EventArgs e )
  ...... {
    System.IO.Stream fileDataStream = FileUpload1.PostedFile.InputStream;

    if (fileDataStream.Length < 1)
    ......{
      Msg.Text = "请选择文件。";
      return;
    }

    //得到文件大小
    int fileLength = FileUpload1.PostedFile.ContentLength;

    //创建数组
    byte[] fileData = new byte[fileLength];
    //把文件流填充到数组
    fileDataStream.Read(fileData, 0, fileLength);
    //得到文件类型
    string fileType = FileUpload1.PostedFile.ContentType;

    //构建数据库连接，SQL语句，创建参数

    SqlConnection myConnection = new SqlConnection(strCnn);
    SqlCommand command = new SqlCommand("INSERT INTO UserPhoto (UserName,ContentType,Photo)" +
    "VALUES (@UserName,@ContentType,@Photo)", myConnection);

    command.Parameters.AddWithValue("@UserName", TextBox1.Text);
    command.Parameters.AddWithValue("@ContentType", fileType);
    command.Parameters.AddWithValue("@Photo", fileData);

    //打开连接，执行查询
    myConnection.Open();
    command.ExecuteNonQuery();
    myConnection.Close();
    Response.Redirect(Request.RawUrl);
  }


   protected void Page_Load( object  sender, EventArgs e )
  ...... {

    if (!Page.IsPostBack)
    ......{
      BindGrid();
    }
  }

   private void  BindGrid( )
  ...... {
    SqlConnection myConnection = new SqlConnection(strCnn);
    SqlCommand myCommand = new SqlCommand("SELECT * FROM UserPhoto Order By id DESC", myConnection);

    try
    ......{
      myConnection.Open();
      GridView1.DataSource = myCommand.ExecuteReader(System.Data.CommandBehavior.CloseConnection);
      GridView1.DataBind();
    }
    catch (Exception SQLexc)
    ......{
      Response.Write("提取数据时出现错误：" + SQLexc.ToString());
    }
  }
   protected string FormatURL( object  strArgument )
  ...... {
    return "ReadImage.aspx?id=" + strArgument.ToString();
  }   

</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
   <title>上传文件到数据库</title>
</head>
<body>
   <form id="MengXianhui" runat="server">
     <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false">
       <Columns>
         <asp:TemplateField>
           <ItemTemplate>
             <%...#Eval("UserName") %>
           </ItemTemplate>
         </asp:TemplateField>
         <asp:TemplateField>
           <ItemTemplate>
             <img src="<%#FormatURL(Eval("id")) %>" /></ItemTemplate>
         </asp:TemplateField>
       </Columns>
     </asp:GridView>
     <br />
     <br />
    姓名： <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
     <br />
    照片： <asp:FileUpload ID="FileUpload1" runat="server" />
     <asp:Button ID="btnUpload" runat="server" Text="上传" OnClick="Button1_Click"></asp:Button>
     <p>
       <asp:Label ID="Msg" runat="server" ForeColor="Red"></asp:Label></p>
   </form>
</body>
</html>

显示图片

<% ...@ Page Language = " C# "   %>

<% ...@ Import Namespace = " System.Data.OleDb "   %>
<% ...@ Import Namespace = " System.Data.SqlClient "   %>
< script runat = " server " > ...

   protected   void  Page_Load(  object  sender, EventArgs e )
  ... ... {
    /**/////构建数据库连接，SQL语句，创建参数
    //ACCESS数据库使用本注释部分
    //string strCnn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("Image2Access.mdb");
    //OleDbConnection myConnection = new OleDbConnection(strCnn);
    //OleDbCommand command = new OleDbCommand("select * from Person Where PersonID =" + Request.QueryString["id"], myConnection);
    //myConnection.Open();
    //OleDbDataReader dr = command.ExecuteReader();
    //if (dr.Read())
    //{
    //  Response.Clear();
    //  Response.AddHeader("Content-Type", dr["PersonImageType"].ToString());
    //  Response.BinaryWrite((byte[])dr["PersonImage"]);
    //}
    //dr.Close();
    //myConnection.Dispose();

    //构建数据库连接，SQL语句，创建参数
    string strCnn = "Persist Security Info=False;User ID=sa;Password=;Initial Catalog=Book;Server=(local);";
    SqlConnection myConnection = new SqlConnection(strCnn);
    SqlCommand command = new SqlCommand("select * from UserPhoto Where id =" + Request.QueryString["id"], myConnection);
    myConnection.Open();
    SqlDataReader dr = command.ExecuteReader();
    if (dr.Read())
    ......{
      Response.Clear();
      Response.AddHeader("Content-Type", dr["ContentType"].ToString());
      Response.BinaryWrite((byte[])dr["Photo"]);
    }
    dr.Close();
    myConnection.Dispose();
  }
</ script >

创建SQL数据表语句

CREATE TABLE [UserPhoto] (
    [id] [ int ] IDENTITY ( 1 ,  1 ) NOT NULL ,
    [UserName] [nvarchar] ( 255 ) COLLATE Chinese_PRC_CI_AS NOT NULL ,
    [ContentType] [varchar] ( 50 ) COLLATE Chinese_PRC_CI_AS NOT NULL ,
    [Photo] [image] NOT NULL ,
    CONSTRAINT [PK_UserPhoto] PRIMARY KEY  CLUSTERED 
    (
        [id]
    )  ON [PRIMARY] 
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
GO