把图片存到sql里面，并从sql读出显示到页面上
http://www.cnblogs.com/Hedonister/
第一个页面的前台
Code<%@ Page Language="C#" AutoEventWireup="true" CodeFile="UpPhoto.aspx.cs" Inherits="UpPhoto" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>无标题页</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:FileUpload ID="FileUpload1" runat="server" />
<asp:Button ID="Button1" runat="server" Text="上传" OnClick="Button1_Click" />
<br />
<br />
<asp:Image ID="Image1" runat="server" ImageUrl ="ShowPhoto.aspx" />
</div>
</form>
</body>
</html>
第一个页面的后台：
Codeusing System;
using System.Data;
using System.Configuration;
using System.Collections;
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.Data.SqlClient;
using System.IO;
public partial class UpPhoto : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
//获得图象并把图象转换为byte[]
HttpPostedFile upPhoto = FileUpload1.PostedFile;
int upPhotoLength = upPhoto.ContentLength;
byte[] PhotoArray = new Byte[upPhotoLength];
Stream PhotoStream = upPhoto.InputStream;
PhotoStream.Read(PhotoArray, 0, upPhotoLength);
//连接数据库
SqlConnection conn = new SqlConnection();
conn.ConnectionString = "Data Source=localhost;Database=zy;User Id=sa;Pwd=sa";
//SqlCommand cmd = new SqlCommand("UpdateImage", conn);
//cmd.CommandType = CommandType.StoredProcedure;
//cmd.Parameters.Add("@UpdateImage", SqlDbType.Image);
//cmd.Parameters["@UpdateImage"].Value = PhotoArray;
//如果你希望不使用存储过程来添加图片把上面四句代码改为：
string strSql = "Insert into test(FImage) values(@FImage)";
SqlCommand cmd = new SqlCommand(strSql, conn);
cmd.Parameters.Add("@FImage", SqlDbType.Image);
cmd.Parameters["@FImage"].Value = PhotoArray;
conn.Open();
cmd.ExecuteNonQuery();
conn.Close();
}
}
第二个页面的后台：
Codeusing System;
using System.Data;
using System.Configuration;
using System.Collections;
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.Data.SqlClient;
public partial class ShowPhoto : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
SqlConnection conn = new SqlConnection();
conn.ConnectionString = "Data Source=localhost;Database=zy;User Id=sa;Pwd=sa";
string strSql = "select FImage from test ";//这里假设获取id为2的图片
conn.Open();
SqlCommand cmd = new SqlCommand(strSql, conn);
SqlDataReader reader = null;
reader=cmd.ExecuteReader();
reader.Read();
Response.ContentType = "application/octet-stream";
Response.BinaryWrite((Byte[])reader["FImage"]);
Response.End();
reader.Close();
}
}
}
原文：
Code1，使用asp.net将图片上传并存入SqlServer中，然后从SqlServer中读取并显示出来
一，上传并存入SqlServer
数据库结构
create table test
{
id identity(1,1),
FImage image
}
相关的存储过程
Create proc UpdateImage
(
@UpdateImage Image
)
As
Insert Into test(FImage) values(@UpdateImage)
GO
在UpPhoto.aspx文件中添加如下:
<input id="UpPhoto" name="UpPhoto" runat="server" type="file">
<asp:Button id="btnAdd" name="btnAdd" runat="server" Text="上传"></asp:Button>
然后在后置代码文件UpPhoto.aspx.cs添加btnAdd按钮的单击事件处理代码:
private void btnAdd_Click(object sender, System.EventArgs e)
{
//获得图象并把图象转换为byte[]
HttpPostedFile upPhoto=UpPhoto.PostedFile;
int upPhotoLength=upPhoto.ContentLength;
byte[] PhotoArray=new Byte[upPhotoLength];
Stream PhotoStream=upPhoto.InputStream;
PhotoStream.Read(PhotoArray,0,upPhotoLength);
//连接数据库
SqlConnection conn=new SqlConnection();
conn.ConnectionString="Data Source=localhost;Database=test;User Id=sa;Pwd=sa";
SqlCommand cmd=new SqlCommand("UpdateImage",conn);
cmd.CommandType=CommandType.StoredProcedure;
cmd.Parameters.Add("@UpdateImage",SqlDbType.Image);
cmd.Parameters["@UpdateImage"].Value=PhotoArray;
//如果你希望不使用存储过程来添加图片把上面四句代码改为：
//string strSql="Insert into test(FImage) values(@FImage)";
//SqlCommand cmd=new SqlCommand(strSql,conn);
//cmd.Parameters.Add("@FImage",SqlDbType.Image);
//cmd.Parameters["@FImage"].Value=PhotoArray;
conn.Open();
cmd.ExecuteNonQuery();
conn.Close();
}
二，从SqlServer中读取并显示出来
在需要显示图片的地方添加如下代码:
<asp:image id="imgPhoto" runat="server" ImageUrl="ShowPhoto.aspx"></asp:image>
ShowPhoto.aspx主体代码：
private void Page_Load(object sender, System.EventArgs e)
{
if(!Page.IsPostBack)
{
SqlConnection conn=new SqlConnection()
conn.ConnectionString="Data Source=localhost;Database=test;User Id=sa;Pwd=sa";
string strSql="select * from test where id=2";//这里假设获取id为2的图片
SqlCommand cmd=new SqlCommand()
reader.Read();
Response.ContentType="application/octet-stream";
Response.BinaryWrite((Byte[])reader["FImage"]);
Response.End();
reader.Close();
}
}
3，在winform中将图片存入sqlserver，并从sqlserver中读取并显示在picturebox中
1,存入sqlserver
数据库结构和使用的存储过过程，同上面的一样
1.1,在窗体中加一个OpenFileDialog控件，命名为ofdSelectPic
1.2,在窗体上添加一个打开文件按钮，添加如下单击事件代码：
Stream ms;
byte[] picbyte;
//ofdSelectPic.ShowDialog();
if (ofdSelectPic.ShowDialog()==DialogResult.OK)
{
if ((ms=ofdSelectPic.OpenFile())!=null)
{
//MessageBox.Show("ok");
picbyte=new byte[ms.Length];
ms.Position=0;
ms.Read(picbyte,0,Convert.ToInt32(ms.Length));
//MessageBox.Show("读取完毕!");
//连接数据库
SqlConnection conn=new SqlConnection();
conn.ConnectionString="Data Source=localhost;Database=test;User Id=sa;Pwd=sa";
SqlCommand cmd=new SqlCommand("UpdateImage",conn);
cmd.CommandType=CommandType.StoredProcedure;
cmd.Parameters.Add("@UpdateImage",SqlDbType.Image);
cmd.Parameters["@UpdateImage"].Value=picbyte;
conn.Open();
cmd.ExecuteNonQuery();
conn.Close();
ms.Close();
}
}
2,读取并显示在picturebox中
2.1 添加一个picturebox,名为ptbShow
2.2 添加一个按钮，添加如下响应事件：
SqlConnection conn=new SqlConnection();
conn.ConnectionString="Data Source=localhost;Database=test;User Id=sa;Pwd=sa";
string strSql="select FImage from test where id=1";
SqlCommand cmd=new SqlCommand(strSql,conn);
conn.Open();
SqlDataReader reader=cmd.ExecuteReader();
reader.Read();
MemoryStream ms=new MemoryStream((byte[])reader["FImage"]);
Image image=Image.FromStream(ms,true);
reader.Close();
conn.Close();
ptbShow.Image=image;
在UpPhoto.aspx文件中添加如下:
<input id="UpPhoto" name="UpPhoto" runat="server" type="file">
<asp:Button id="btnAdd" name="btnAdd" runat="server" Text="上传"></asp:Button>
然后在后置代码文件UpPhoto.aspx.cs添加btnAdd按钮的单击事件处理代码:
private void btnAdd_Click(object sender, System.EventArgs e)
{
//获得图象并把图象转换为byte[]
HttpPostedFile upPhoto=UpPhoto.PostedFile;
int upPhotoLength=upPhoto.ContentLength;
byte[] PhotoArray=new Byte[upPhotoLength];
Stream PhotoStream=upPhoto.InputStream;
PhotoStream.Read(PhotoArray,0,upPhotoLength);
//连接数据库
SqlConnection conn=new SqlConnection();
conn.ConnectionString="Data Source=localhost;Database=test;User Id=sa;Pwd=sa";
SqlCommand cmd=new SqlCommand("UpdateImage",conn);
cmd.CommandType=CommandType.StoredProcedure;
cmd.Parameters.Add("@UpdateImage",SqlDbType.Image);
cmd.Parameters["@UpdateImage"].Value=PhotoArray;
//如果你希望不使用存储过程来添加图片把上面四句代码改为：
//string strSql="Insert into test(FImage) values(@FImage)";
//SqlCommand cmd=new SqlCommand(strSql,conn);
//cmd.Parameters.Add("@FImage",SqlDbType.Image);
//cmd.Parameters["@FImage"].Value=PhotoArray;
conn.Open();
cmd.ExecuteNonQuery();
conn.Close();
}
二，从SqlServer中读取并显示出来
在需要显示图片的地方添加如下代码:
<asp:image id="imgPhoto" runat="server" ImageUrl="ShowPhoto.aspx"></asp:image>
ShowPhoto.aspx主体代码：
private void Page_Load(object sender, System.EventArgs e)
{
if(!Page.IsPostBack)
{
SqlConnection conn=new SqlConnection()
conn.ConnectionString="Data Source=localhost;Database=test;User Id=sa;Pwd=sa";
string strSql="select * from test where id=2";//这里假设获取id为2的图片
SqlCommand cmd=new SqlCommand()
reader.Read();
Response.ContentType="application/octet-stream";
Response.BinaryWrite((Byte[])reader["FImage"]);
Response.End();
reader.Close();
}
}
3，在winform中将图片存入sqlserver，并从sqlserver中读取并显示在picturebox中
1,存入sqlserver
数据库结构和使用的存储过过程，同上面的一样
1.1,在窗体中加一个OpenFileDialog控件，命名为ofdSelectPic
1.2,在窗体上添加一个打开文件按钮，添加如下单击事件代码：
Stream ms;
byte[] picbyte;
//ofdSelectPic.ShowDialog();
if (ofdSelectPic.ShowDialog()==DialogResult.OK)
{
if ((ms=ofdSelectPic.OpenFile())!=null)
{
//MessageBox.Show("ok");
picbyte=new byte[ms.Length];
ms.Position=0;
ms.Read(picbyte,0,Convert.ToInt32(ms.Length));
//MessageBox.Show("读取完毕!");
//连接数据库
SqlConnection conn=new SqlConnection();
conn.ConnectionString="Data Source=localhost;Database=test;User Id=sa;Pwd=sa";
SqlCommand cmd=new SqlCommand("UpdateImage",conn);
cmd.CommandType=CommandType.StoredProcedure;
cmd.Parameters.Add("@UpdateImage",SqlDbType.Image);
cmd.Parameters["@UpdateImage"].Value=picbyte;
conn.Open();
cmd.ExecuteNonQuery();
conn.Close();
ms.Close();
}
}
2,读取并显示在picturebox中
2.1 添加一个picturebox,名为ptbShow
2.2 添加一个按钮，添加如下响应事件：
SqlConnection conn=new SqlConnection();
conn.ConnectionString="Data Source=localhost;Database=test;User Id=sa;Pwd=sa";
string strSql="select FImage from test where id=1";
SqlCommand cmd=new SqlCommand(strSql,conn);
conn.Open();
SqlDataReader reader=cmd.ExecuteReader();
reader.Read();
MemoryStream ms=new MemoryStream((byte[])reader["FImage"]);
Image image=Image.FromStream(ms,true);
reader.Close();
conn.Close();
ptbShow.Image=image;
