//支持缩略图，是否等比缩放，指定像素缩放，限定上传大小，上传尺寸，图片存放路径，信息导出
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.Drawing;
using System.IO;
/// <summary>
/// UploadIMG 的摘要说明
/// </summary>
public class UploadIMG
{
public UploadIMG()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
private string _MSG;
private string _ofullname;
private string _tfullname;
private string _ofilename;
private string _tfilename;
private int _limitwidth = 2048;
private int _limitheight = 1536;
private int _twidth = 100;
private int _theight = 100;
private int _size = 1000000;
private bool _israte = true;
private string _path = "UpdateFile";
/// <summary>
/// 信息
/// </summary>
public string MSG
{
get { return _MSG; }
set { _MSG = value; }
}
/// <summary>
/// 保存时的完整路径.原图
/// </summary>
public string OFullName
{
get { return _ofullname; }
set { _ofullname = value; }
}
/// <summary>
/// 保存时的完整路径.缩略图
/// </summary>
public string TFullName
{
get { return _tfullname; }
set { _tfullname = value; }
}
/// <summary>
/// 保存时的图片名称.原图
/// </summary>
public string OFileName
{
get { return _ofilename; }
set { _ofilename = value; }
}
/// <summary>
/// 保存时的图片名称.缩略图
/// </summary>
public string TFileName
{
get { return _tfilename; }
set { _tfilename = value; }
}
/// <summary>
/// 限定宽度
/// </summary>
public int LimitWidth
{
get { return _limitwidth; }
set { _limitwidth = value; }
}
/// <summary>
/// 限定高度
/// </summary>
public int LimitHeight
{
get { return _limitheight; }
set { _limitheight = value; }
}
/// <summary>
/// 缩略图宽度
/// </summary>
public int TWidth
{
get { return _twidth; }
set { _twidth = value; }
}
/// <summary>
/// 缩略图高度
/// </summary>
public int THeight
{
get { return _theight; }
set { _theight = value; }
}
/// <summary>
/// 文件大小
/// </summary>
public int Size
{
get { return _size; }
set { _size = value; }
}
/// <summary>
/// 是否成比例
/// </summary>
public bool IsRate
{
get { return _israte; }
set { _israte = value; }
}
/// <summary>
/// 存放图片的文件夹名称
/// </summary>
public string Path
{
get { return _path; }
set { _path = value; }
}

/// <summary>
/// 图片上传(默认:"等比压缩,限定上传尺寸2048*1536,缩略图尺寸100*100,限定上传大小1MB,存放在根目录UpdateFile中")
/// </summary>
/// <param name="UploadFile">文件上传控件</param>
/// <returns>返回是否成功保存图片</returns>
public bool UpLoadIMG(FileUpload UploadFile)
{
if (UploadFile.HasFile)//检查是否已经选择文件
{
string filename = UploadFile.FileName.ToLower();
int i = filename.LastIndexOf(".");
filename = filename.Substring(i, filename.Length - i);
if (!(filename == ".jpg" || filename == ".jpeg" || filename == ".gif" || filename == ".png" || filename == ".bmp"))
{
MSG = "不受支持的类型,请重新选择!";
return false;
}//检查上传文件的格式是否有效
if (UploadFile.PostedFile.ContentLength == 0 || UploadFile.PostedFile.ContentLength >= Size)
{
MSG = "指定的文件大小不符合要求!";
return false;
}//检查图片文件的大小
//生成原图 
Stream oStream = UploadFile.PostedFile.InputStream;
System.Drawing.Image oImage = System.Drawing.Image.FromStream(oStream);
int owidth = oImage.Width; //原图宽度 
int oheight = oImage.Height; //原图高度
if (owidth > LimitWidth || oheight > LimitHeight)
{
MSG = "超过允许的图片尺寸范围!";
return false;
}//检查是否超出规定尺寸
if (IsRate)
{
//按比例计算出缩略图的宽度和高度 
if (owidth >= oheight)
{
THeight = (int)Math.Floor(Convert.ToDouble(oheight) * (Convert.ToDouble(TWidth) / Convert.ToDouble(owidth)));//等比设定高度
}
else
{
TWidth = (int)Math.Floor(Convert.ToDouble(owidth) * (Convert.ToDouble(THeight) / Convert.ToDouble(oheight)));/