ASP.NET裡面以二進位制的形式上傳和讀取圖片
阿新 • • 發佈:2019-01-29
using System;
using System.Data;
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
{
protected void Page_Load(object sender, EventArgs e)
{
}
//上傳圖片
protected void Button1_Click(object sender, EventArgs e)
{
String pathName = this.File1.Value;//獲取檔案路徑
FileStream fs = new FileStream(pathName, FileMode.Open, FileAccess.Read);//建立檔案流
byte[] buffByle = new byte[fs.Length];// 建立一個byte 陣列
fs.Read(buffByle, 0, (int)fs.Length);//讀取流 寫入緩衝區
fs.Close();
// 把二進位制存入資料庫
SqlConnection conn = new SqlConnection("server=PC-200807242100;database=phone;uid=sa;pwd=251");
SqlCommand comm = new SqlCommand();
conn.Open();
comm.CommandText = "insert into image values(@image)";
comm.Connection = conn;
comm.CommandType = CommandType.Text;
comm.Parameters.Add("@image", SqlDbType.Image);//必須是Image 內型
comm.Parameters[0].Value = buffByle;
int i=comm.ExecuteNonQuery();
Response.Write(i);
conn.Close();
}
//讀取圖片
protected void Button2_Click(object sender, EventArgs e)
{
DataTable tb = new DataTable();
SqlConnection conn = new SqlConnection("server=PC-200807242100;database=phone;uid=sa;pwd=251");
conn.Open();
SqlDataAdapter Adapter = new SqlDataAdapter("select * from image ", conn);
Adapter.Fill(tb);
byte[] buffByle = (byte[])tb.Rows[0][0];//把資料庫中圖片的二進位制資料轉換一個byte陣列
int filelength = buffByle.Length;//獲得陣列的長度
//建立在伺服器上對應虛擬路徑的物理路徑
string myUrl = HttpContext.Current.Server.MapPath(this.Request.ApplicationPath) + @"/TempDownLoad";
// 建立檔案流
FileStream fs = new FileStream(myUrl, FileMode.OpenOrCreate);
BinaryWriter w = new BinaryWriter(fs);//以二進位制的形式將基元內寫入流
w.BaseStream.Write(buffByle, 0, filelength);//把資料庫中的圖片二進位制新增到BinaryWriter
w.Flush();
w.Close();
Image1.ImageUrl = Context.Request.ApplicationPath + "/TempDownLoad/";
}
}
using System.Data;
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
{
protected void Page_Load(object sender, EventArgs e)
{
}
//上傳圖片
protected void Button1_Click(object sender, EventArgs e)
{
String pathName = this.File1.Value;//獲取檔案路徑
FileStream fs = new FileStream(pathName, FileMode.Open, FileAccess.Read);//建立檔案流
byte[] buffByle = new byte[fs.Length];// 建立一個byte 陣列
fs.Read(buffByle, 0, (int)fs.Length);//讀取流 寫入緩衝區
fs.Close();
// 把二進位制存入資料庫
SqlConnection conn = new SqlConnection("server=PC-200807242100;database=phone;uid=sa;pwd=251");
SqlCommand comm = new SqlCommand();
conn.Open();
comm.CommandText = "insert into image values(@image)";
comm.Connection = conn;
comm.CommandType = CommandType.Text;
comm.Parameters.Add("@image", SqlDbType.Image);//必須是Image 內型
comm.Parameters[0].Value = buffByle;
int i=comm.ExecuteNonQuery();
Response.Write(i);
conn.Close();
}
//讀取圖片
protected void Button2_Click(object sender, EventArgs e)
{
DataTable tb = new DataTable();
SqlConnection conn = new SqlConnection("server=PC-200807242100;database=phone;uid=sa;pwd=251");
conn.Open();
SqlDataAdapter Adapter = new SqlDataAdapter("select * from image ", conn);
Adapter.Fill(tb);
byte[] buffByle = (byte[])tb.Rows[0][0];//把資料庫中圖片的二進位制資料轉換一個byte陣列
int filelength = buffByle.Length;//獲得陣列的長度
//建立在伺服器上對應虛擬路徑的物理路徑
string myUrl = HttpContext.Current.Server.MapPath(this.Request.ApplicationPath) + @"/TempDownLoad";
// 建立檔案流
FileStream fs = new FileStream(myUrl, FileMode.OpenOrCreate);
BinaryWriter w = new BinaryWriter(fs);//以二進位制的形式將基元內寫入流
w.BaseStream.Write(buffByle, 0, filelength);//把資料庫中的圖片二進位制新增到BinaryWriter
w.Flush();
w.Close();
Image1.ImageUrl = Context.Request.ApplicationPath + "/TempDownLoad/";
}
}