1、存入数据库
int DocLen = FileUpload1.PostedFile.ContentLength;
byte[] Docbuffer = new byte[DocLen];
Stream objStream = FileUpload1.PostedFile.InputStream;
objStream.Read(Docbuffer, 0, DocLen);
SqlConnection myconn = new SqlConnection(ConfigurationManager.ConnectionStrings["BaseConnectionString"].ConnectionString);
SqlCommand mycmd = new SqlCommand();
mycmd.Connection = myconn;
myconn.Open();
mycmd.CommandText = "INSERT INTO Temp1(FileType,FileSize,FileContent) VALUES ('" + FileUpload1.FileName.ToString().Substring(FileUpload1.FileName.Length - 4) + "','" + DocLen.ToString() + "',@FileContent)";
SqlParameter paramData = new SqlParameter("@FileContent", SqlDbType.Image);
paramData.Value = Docbuffer;
mycmd.Parameters.Add(paramData);
mycmd.ExecuteNonQuery();
myconn.Close();
2、从数据库中读取
SqlCommand mycmd= new SqlCommand("SELECT FileType,FileSize,FileContent FROM Temp1 WHERE ID = 1", myconn);
SqlDataReader mydr = mycmd.ExecuteReader();
if (mydr.Read())
{
Response.Clear();
Response.ContentType = "application/octet-stream";
Response.AddHeader("Content-Disposition", "attachment; filename=" + DateTime.Now.ToString() + HttpUtility.UrlEncode( + mydr["FileType"].ToString(), System.Text.Encoding.UTF8));
byte[] buffer = new Byte[10240];
long datalen = mydr.GetBytes(2, 0, null, 0, 0);
long curPos = 0;
long readsize = 0;
readsize = mydr.GetBytes(2, curPos, buffer, 0, 10240);
while (readsize == 10240)
{
curPos += readsize;
Response.BinaryWrite(buffer);
Response.Flush();
readsize = mydr.GetBytes(2, curPos, buffer, 0, 10240);
}
byte[] rBuf = new Byte[readsize];
mydr.GetBytes(2, curPos, rBuf, 0, (int)readsize);
Response.BinaryWrite(rBuf);
Response.Flush();
}
mydr.Close();
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