using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO;
using System.Data.SqlClient;
public partial class _Default : System.Web.UI.Page
{
Int32 FileLength = 0;
protected void Page_Load(object sender, EventArgs e)
{
}
//存储
protected void Button1_Click(object sender, EventArgs e)
{
HttpPostedFile UpFile = UP_File.PostedFile;//HttpPostedFile对象，用于读取图象文件属性
FileLength = UpFile.ContentLength;
try
{
if (FileLength == 0)
{
lblMessage.Text = "<b>请选择您要上传的文件</b>";
}
else
{
Byte[] FileByteArray = new byte[FileLength]; //图象文件临时储存Byte数组
Stream StreamObj = UpFile.InputStream;//建立数据流对像
//读取图象文件数据，FileByteArray为数据储存体，0为数据指针位置、FileLnegth为数据长度
StreamObj.Read(FileByteArray, 0, FileLength);
SqlConnection Con = new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"]);
String SqlCmd = "INSERT INTO ImageStore (ImageData,ImageContentType,ImageDescription,ImageSize) VALUES (@Image,@ContentType,@ImageDescription,@ImageSize)";
SqlCommand CmdObj = new SqlCommand(SqlCmd, Con);
CmdObj.Parameters.Add("@Image", SqlDbType.Binary, FileLength).Value = FileByteArray;
CmdObj.Parameters.Add("@ContentType", SqlDbType.VarChar, 50).Value = UpFile.ContentType;//记录文件类型
//把其它单表数据记录上传
CmdObj.Parameters.Add("@ImageDescription", SqlDbType.VarChar, 200).Value = txtDescription.Text;
//记录文件长度，读取时使用
CmdObj.Parameters.Add("@ImageSize", SqlDbType.BigInt, 8).Value = UpFile.ContentLength;
Con.Open();
CmdObj.ExecuteNonQuery();
Con.Close();
lblMessage.Text = "<p><b>OK!你已经成功上传你的图片</b>";//提示上传成功
}
}
catch (Exception ex)
{
lblMessage.Text = ex.Message.ToString();
}
}
//读取
private void ImgDataRead()
{
int ImgID = Convert.ToInt32(Request.QueryString["id"]);
SqlConnection Con = new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"]);
String SqlCmd = "SELECT * FROM ImageStore WHERE ID = @ImageID";
SqlCommand CmdObj = new SqlCommand(SqlCmd, Con);
CmdObj.Parameters.Add("@ImageID", SqlDbType.Int).Value = ImgID;
Con.Open();
SqlDataReader SqlReader = CmdObj.ExecuteReader();
SqlReader.Read();
Response.ContentType = (string)SqlReader["ImageContentType"];//设定输出文件类型
//输出图象文件二进制数制
Response.OutputStream.Write((byte[])SqlReader["ImageData"],0,Convert.ToInt32(SqlReader["ImageSize"]));
Response.BufferOutput = true;
Con.Close();
}
}