ASP.NET2.0中将文件上传到数据库(转载)

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">

    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>

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

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