数据库存储图片
///<summary>
/// 上传图片
///</summary>
///<param name="FUSShopURL"& gt;FileUpload对象</param>
///<param name="UpladURL">图片要放到的目录名称</param>
///<returns>如果FileUpload不为空则返回上传后的图片位置,否则返回为空字符</returns>
publicstaticstring uploadImage(FileUpload FUSShopURL, string UpladURL)
{
if (FUSShopURL.HasFile)
{
// 获取当前的时间,一当作图片的名字
string fileName = DateTime.Now.ToString("yyyyMMddhhmmss") + DateTime.Now.Millisecond.ToString();
// 获取图片的扩展名
string Extent = System.IO.Path.GetExtension(FUSShopURL.PostedFile.FileName);
// 重命名图片
fileName += Extent;
//设置上传图片保存的文件夹
string dir = System.Web.HttpContext.Current.Server.MapPath(UpladURL);
// 指定图片的路径及文件名
string path = dir +"\\"+ fileName;
// 把上传得图片保存到指定的文件加中
FUSShopURL.PostedFile.SaveAs(path);
return fileName;
}
else
{
return"";
}
}
/// 上传图片
///</summary>
///<param name="FUSShopURL"& gt;FileUpload对象</param>
///<param name="UpladURL">图片要放到的目录名称</param>
///<returns>如果FileUpload不为空则返回上传后的图片位置,否则返回为空字符</returns>
publicstaticstring uploadImage(FileUpload FUSShopURL, string UpladURL)
{
if (FUSShopURL.HasFile)
{
// 获取当前的时间,一当作图片的名字
string fileName = DateTime.Now.ToString("yyyyMMddhhmmss") + DateTime.Now.Millisecond.ToString();
// 获取图片的扩展名
string Extent = System.IO.Path.GetExtension(FUSShopURL.PostedFile.FileName);
// 重命名图片
fileName += Extent;
//设置上传图片保存的文件夹
string dir = System.Web.HttpContext.Current.Server.MapPath(UpladURL);
// 指定图片的路径及文件名
string path = dir +"\\"+ fileName;
// 把上传得图片保存到指定的文件加中
FUSShopURL.PostedFile.SaveAs(path);
return fileName;
}
else
{
return"";
}
}
这个方法是与FileUpload控件 一起使用的,方法很简单大家一看就明白了。方法返回的就是一个相对的路经可以直接存储的数据里,然后从前台调用就可以了。
第二种方式 直接把图片的Base64String码进行存取
这种方法很方便,直接转化一下就行了,不需要书写很麻烦的路经问题,先看一下是怎么存储到数据库的吧:
//选择图片
privatevoid button1_Click(object sender, EventArgs e)
{
OpenFileDialog openfile =new OpenFileDialog();
openfile.Title =" 请选择客户端longin的图片";
openfile.Filter ="Login图片 (*.jpg;*.bmp;*png)|*.jpeg;*.jpg;*.bmp;*.png|AllFiles(*.*)|*.*";
if (DialogResult.OK == openfile.ShowDialog())
{
try
{
Bitmap bmp =new Bitmap(openfile.FileName);
pictureBox1.Image = bmp;
pictureBox1.SizeMode = PictureBoxSizeMode.Zoom;
MemoryStream ms =new MemoryStream();
bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
byte[] arr =newbyte[ms.Length];
ms.Position =0;
ms.Read(arr, 0, (int)ms.Length);
ms.Close();
// 直接返这个值放到数据就行了
pic = Convert.ToBase64String(arr);
}
catch { }
}
}
privatevoid button1_Click(object sender, EventArgs e)
{
OpenFileDialog openfile =new OpenFileDialog();
openfile.Title =" 请选择客户端longin的图片";
openfile.Filter ="Login图片 (*.jpg;*.bmp;*png)|*.jpeg;*.jpg;*.bmp;*.png|AllFiles(*.*)|*.*";
if (DialogResult.OK == openfile.ShowDialog())
{
try
{
Bitmap bmp =new Bitmap(openfile.FileName);
pictureBox1.Image = bmp;
pictureBox1.SizeMode = PictureBoxSizeMode.Zoom;
MemoryStream ms =new MemoryStream();
bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
byte[] arr =newbyte[ms.Length];
ms.Position =0;
ms.Read(arr, 0, (int)ms.Length);
ms.Close();
// 直接返这个值放到数据就行了
pic = Convert.ToBase64String(arr);
}
catch { }
}
}
读取的方法也很简单, pic就是我们得到的图片字符串只要我们存储到数据库里,从下面的方法里读取就可以了。需要注意的地方我都加的有注释:
//加载图片
privatevoid Form1_Load(object sender, EventArgs e)
{
try
{
// pic=........这一句换成从数据库里读取就可以了
// 判断是否为空,为空时的不执行
if (!string.IsNullOrEmpty(pic))
{
// 直接返Base64码转成数组
byte[] imageBytes = Convert.FromBase64String(pic);
// 读入MemoryStream对象
MemoryStream memoryStream =new MemoryStream(imageBytes, 0,imageBytes.Length);
memoryStream.Write(imageBytes, 0, imageBytes.Length);
// 转成图片
Image image = Image.FromStream(memoryStream);
//memoryStream.Close(); //不要加上这一句否则就不对了
// 将图片放置在 PictureBox 中
this.pictureBox1.SizeMode = PictureBoxSizeMode.Zoom;
this.pictureBox1.Image = image;
}
}
catch { }
}
privatevoid Form1_Load(object sender, EventArgs e)
{
try
{
// pic=........这一句换成从数据库里读取就可以了
// 判断是否为空,为空时的不执行
if (!string.IsNullOrEmpty(pic))
{
// 直接返Base64码转成数组
byte[] imageBytes = Convert.FromBase64String(pic);
// 读入MemoryStream对象
MemoryStream memoryStream =new MemoryStream(imageBytes, 0,imageBytes.Length);
memoryStream.Write(imageBytes, 0, imageBytes.Length);
// 转成图片
Image image = Image.FromStream(memoryStream);
//memoryStream.Close(); //不要加上这一句否则就不对了
// 将图片放置在 PictureBox 中
this.pictureBox1.SizeMode = PictureBoxSizeMode.Zoom;
this.pictureBox1.Image = image;
}
}
catch { }
}
大家看一下效果吧:
在这里我们只要单击选择图片直接就可以更换。这些很简单但是我个人感觉还是很常用的,而且网上关于这块的例子着实不少,不过真正能帮上忙的还真不多,因为我们的好几个项目里用到了这些方法,或多或少的还是有些员工不怎么会, 在这里贴一贴方便新手查看吧。
下面的本例子的所有代码:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Threading;
namespace WindowsFormsApplication1
{
publicpartialclass Form1 : Form
{
public Form1()
{
InitializeComponent();
}
string pic ="";
// 加载图片
privatevoid Form1_Load(object sender, EventArgs e)
{
try
{
if (!string.IsNullOrEmpty(pic))
{
byte[] imageBytes = Convert.FromBase64String(pic);
MemoryStream memoryStream =new MemoryStream(imageBytes, 0, imageBytes.Length);
memoryStream.Write(imageBytes, 0, imageBytes.Length);
Image image = Image.FromStream(memoryStream);
// 将图片放置在 PictureBox 中
this.pictureBox1.SizeMode = PictureBoxSizeMode.Zoom;
this.pictureBox1.Image = image;
}
}
catch { }
}
// 选择图片
privatevoid button1_Click(object sender, EventArgs e)
{
OpenFileDialog openfile =new OpenFileDialog();
openfile.Title =" 请选择客户端longin的图片";
openfile.Filter ="Login图片 (*.jpg;*.bmp;*png)|*.jpeg;*.jpg;*.bmp;*.png|AllFiles(*.*)|*.*";
if (DialogResult.OK == openfile.ShowDialog())
{
try
{
Bitmap bmp =new Bitmap(openfile.FileName);
pictureBox1.Image = bmp;
pictureBox1.SizeMode = PictureBoxSizeMode.Zoom;
MemoryStream ms =new MemoryStream();
bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
byte[] arr =newbyte[ms.Length];
ms.Position =0;
ms.Read(arr, 0, (int)ms.Length);
ms.Close();
pic = Convert.ToBase64String(arr);
}
catch { }
}
}
}
}
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Threading;
namespace WindowsFormsApplication1
{
publicpartialclass Form1 : Form
{
public Form1()
{
InitializeComponent();
}
string pic ="";
// 加载图片
privatevoid Form1_Load(object sender, EventArgs e)
{
try
{
if (!string.IsNullOrEmpty(pic))
{
byte[] imageBytes = Convert.FromBase64String(pic);
MemoryStream memoryStream =new MemoryStream(imageBytes, 0, imageBytes.Length);
memoryStream.Write(imageBytes, 0, imageBytes.Length);
Image image = Image.FromStream(memoryStream);
// 将图片放置在 PictureBox 中
this.pictureBox1.SizeMode = PictureBoxSizeMode.Zoom;
this.pictureBox1.Image = image;
}
}
catch { }
}
// 选择图片
privatevoid button1_Click(object sender, EventArgs e)
{
OpenFileDialog openfile =new OpenFileDialog();
openfile.Title =" 请选择客户端longin的图片";
openfile.Filter ="Login图片 (*.jpg;*.bmp;*png)|*.jpeg;*.jpg;*.bmp;*.png|AllFiles(*.*)|*.*";
if (DialogResult.OK == openfile.ShowDialog())
{
try
{
Bitmap bmp =new Bitmap(openfile.FileName);
pictureBox1.Image = bmp;
pictureBox1.SizeMode = PictureBoxSizeMode.Zoom;
MemoryStream ms =new MemoryStream();
bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
byte[] arr =newbyte[ms.Length];
ms.Position =0;
ms.Read(arr, 0, (int)ms.Length);
ms.Close();
pic = Convert.ToBase64String(arr);
}
catch { }
}
}
}
}
第三种方式 读成二进制后进行存取
先把图片读成二进制以后再做处理,这样快捷而且代码相对少很多,还有就是感谢下面几位网友的提醒和建议,在这里我把我简单写的代码贴一下,怎么样存储到数据库的方法还是大家自己写我只提供存取的方法:
privatevoid button1_Click(object sender, EventArgs e)
{
OpenFileDialog openfile =new OpenFileDialog();
openfile.Title =" 请选择客户端longin的图片";
openfile.Filter ="Login图片 (*.jpg;*.bmp;*png)|*.jpeg;*.jpg;*.bmp;*.png|AllFiles(*.*)|*.*";
if (DialogResult.OK == openfile.ShowDialog())
{
try
{
// 读成二进制
byte[] bytes = File.ReadAllBytes(openfile.FileName);
// 直接返这个存储到数据就行了 cmd.Parameters.Add("@image", SqlDbType.Image).Value = bytes;
// 输出二进制 在这里把数据中取到的值放在这里byte[] bytes=(byte[])model.image;
pictureBox1.Image = System.Drawing.Image.FromStream(new MemoryStream(bytes));
this.pictureBox1.SizeMode = PictureBoxSizeMode.Zoom;
// 如果保存成文件:
File.WriteAllBytes(@"d:\text.jpg", bytes);
}
catch { }
}
}
{
OpenFileDialog openfile =new OpenFileDialog();
openfile.Title =" 请选择客户端longin的图片";
openfile.Filter ="Login图片 (*.jpg;*.bmp;*png)|*.jpeg;*.jpg;*.bmp;*.png|AllFiles(*.*)|*.*";
if (DialogResult.OK == openfile.ShowDialog())
{
try
{
// 读成二进制
byte[] bytes = File.ReadAllBytes(openfile.FileName);
// 直接返这个存储到数据就行了 cmd.Parameters.Add("@image", SqlDbType.Image).Value = bytes;
// 输出二进制 在这里把数据中取到的值放在这里byte[] bytes=(byte[])model.image;
pictureBox1.Image = System.Drawing.Image.FromStream(new MemoryStream(bytes));
this.pictureBox1.SizeMode = PictureBoxSizeMode.Zoom;
// 如果保存成文件:
File.WriteAllBytes(@"d:\text.jpg", bytes);
}
catch { }
}
}
凡事用心去做,认真对待!