实例介绍
【实例简介】SwfUpload案例
【实例截图】
【实例截图】
【核心代码】
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Configuration;
using System.Xml;
using System.Web;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;
using System.Web.UI;
using System.Net;
using IMMENSITY.SWFUploadAPI.Enums;
namespace IMMENSITY.SWFUploadAPI
{
/// <summary>
/// Description:文件上传方法类
/// Author:张盼
/// Date:2010-01-16
///
/// 注意:如果需要附加图片水印,需要在WebConfig中添加如下配置
/// <appSettings><add key="WaterMarkPath" value="路径"/></appSettings>
/// 如果需要添加小图,需要在WebConfig中添加如下配置,默认为small_
/// <appSettings><add key="SmallPicPrefix" value="前缀"/></appSettings>
/// 如果需要文字水印,需要在WebConfig中添加如下配置
/// <appSettings><add key="WaterMarkText" value="文字内容"/></appSettings>
/// </summary>
public class SWFUploadFile
{
/// <summary>
/// 数据请求基类
/// </summary>
private HttpPostedFile _HPFile = null;
/// <summary>
/// 水印图片文件
/// </summary>
private string _waterMarkImgPath = string.Empty;
/// <summary>
/// 网站根目录
/// </summary>
private string _webPath = System.Web.HttpContext.Current.Server.MapPath("~/");
public SWFUploadFile()
{
//默认上传路径
this.Path = System.Web.HttpContext.Current.Server.MapPath("~/");
//大图子文件夹
this.BigChildPath = "b";
//小图子文件夹
this.SmallChildPath = "s";
//水印图片路径
this._waterMarkImgPath = Path "/" SWFWebConfigManage.GetByAppSettingsKey("WaterMarkPath");
//当前时间用作文件名(年,月,日,时,分,秒,3位毫秒)
this.NewFileName = DateTime.Now.ToString("yyyyMMddhhmmssfff");
//默认不生成小图
this.SmallPic = false;
//默认生成小图片最大的宽度
this.MaxWith = 140;
//默认生成小图片最大的高度
this.MaxHeight = 140;
//默认不需要水印
this.IsWaterMark = false;
//默认水印类型
this.WMType = SWFWaterMarkType.WM_IMAGE;
//水印位置,默认为右下
this.WMLocation = SWFWaterMarkLocation.WM_BOTTOM_RIGHT;
//水印文字
this.WaterMarkText = SWFWebConfigManage.GetByAppSettingsKey("WaterMarkText");//水印文字
}
#region 公共属性
/// <summary>
/// 上传路径 默认:网站根目录
/// </summary>
public string Path { get; set; }
/// <summary>
/// 大图子文件夹
/// </summary>
public string BigChildPath { get; set; }
/// <summary>
/// 小图子文件夹
/// </summary>
public string SmallChildPath { get; set; }
///<summary>
/// 新的文件名 默认:年 月 日 时 分 秒 毫秒
///</summary>
public string NewFileName { get; set; }
///<summary>
/// 上传小图片最大宽度 默认:140
///</summary>
public int MaxWith { get; set; }
///<summary>
/// 上传小图片最大高度度 默认:140
///</summary>
public int MaxHeight { get; set; }
///<summary>
/// 是否需要小图 已否决
///</summary>
public bool SmallPic { get; set; }
/// <summary>
/// 是否添加水印
/// </summary>
public bool IsWaterMark { get; set; }
/// <summary>
/// 水印类型
/// </summary>
public SWFWaterMarkType WMType { get; set; }
/// <summary>
/// 水印位置
/// </summary>
public SWFWaterMarkLocation WMLocation { get; set; }
/// <summary>
/// 文字水印
/// </summary>
private string WaterMarkText { get; set; }
#endregion
#region 上传
//根据 mime 类型，返回编码器
private System.Drawing.Imaging.ImageCodecInfo GetEncoderInfo(string mimeType)
{
System.Drawing.Imaging.ImageCodecInfo result = null;
//检索已安装的图像编码解码器的相关信息。
System.Drawing.Imaging.ImageCodecInfo[] encoders =
System.Drawing.Imaging.ImageCodecInfo.GetImageEncoders();
for (int i = 0; i < encoders.Length; i )
{
if (encoders[i].MimeType == mimeType)
{
result = encoders[i];
break;
}
}
return result;
}
/// <summary>
/// 开始上传
/// </summary>
/// <param name="hpfBase">数据请求基类</param>
/// <param name="savePath">要保存的路径</param>
/// <param name="oldFileName">旧文件名称,便于删除(注:如果存在文件夹路径,程序将自动去除,只留下文件名)</param>
/// <param name="state">上传状态. 0:上传成功. 1:没有选择要上传的文件. 2:上传文件类型不符. 3:上传文件过大 -1:应用程序错误.</param>
/// <returns>文件名</returns>
public string SaveFile(HttpPostedFile hpfBase, string savePath, string oldFileName, ref int state)
{
oldFileName = this.ClearFileFolder(oldFileName);
this._HPFile = hpfBase;
return this.Save(savePath, oldFileName, ref state);
}
/// <summary>
/// 去除文件名中的文件夹名
/// </summary>
/// <param name="fileName">文件名</param>
/// <returns></returns>
private string ClearFileFolder(string fileName)
{
fileName = fileName.Trim().Replace("//", "/").Replace("\\", "/");
if (fileName != string.Empty && fileName.IndexOf(".") != -1 && fileName.IndexOf("/") != -1)
{
fileName = fileName.Substring(fileName.LastIndexOf("/") 1, fileName.Length - fileName.LastIndexOf("/") - 1);
}
return fileName;
}
/// <summary>
/// 上传核心
/// 返回文件名或上传状态
/// </summary>
/// <param name="inputFile">上传控件</param>
/// <param name="savePath">存放的文件夹 从网站根目录起</param>
/// <param name="oldFileName">在修改图片时指定旧图片名以便删除 默认为空字符串</param>
/// <returns>返回上传状态. 0:上传成功. 1:没有选择要上传的文件. 2:上传文件类型不符. 3:上传文件过大 -1:应用程序错误.</returns>
private string Save(string savePath, string oldFileName, ref int state)
{
try
{
#region 判断是否已选择文件 如果没选择返回旧图片名
//_inputFileValue为空 表示没有选择文件 返回状态1
if (this._HPFile.ContentLength==0)
{
//设置状态为没有选择图片
state = 1;
//返回旧图片名
return oldFileName;
}
#endregion
#region 检查目录是否存在
DirectoryInfo dir = new DirectoryInfo(this.Path savePath "/" this.BigChildPath);
//判断大图存放目录是否存在 不存在则创建
if (!dir.Exists) { dir.Create(); }
if (this.SmallPic)
{
dir = new DirectoryInfo(this.Path savePath "/" this.SmallChildPath);
//判断小图存放目录是否存在 不存在则创建
if (!dir.Exists) { dir.Create(); }
}
#endregion
#region 开始上传
string extension = System.IO.Path.GetExtension(this._HPFile.FileName).ToLower();
//存放文件路径 文件名
string filePath = string.Format("{0}{1}/{2}/{3}{4}", this.Path, savePath, this.BigChildPath, this.NewFileName, extension);
//判断是否需要水印
if (IsWaterMark)
{
string tempPath = string.Format("{0}/temp/{1}{2}", this.Path, this.NewFileName, extension);
dir = new DirectoryInfo(string.Format("{0}/temp", this.Path));
//判断是否存在temp临时目录,如果不存在则创建
if (!dir.Exists) { dir.Create(); }
if (this._HPFile != null) { this._HPFile.SaveAs(tempPath); }
//开始上传文件
this.addWaterMark(tempPath, filePath);
}
else
{
//开始上传文件
if (this._HPFile != null) { this._HPFile.SaveAs(filePath); }
}
#region 上传小图
if (SmallPic)
{
string newFilePath = string.Format("{0}{1}/{2}/{3}{4}", this.Path, savePath, this.SmallChildPath, this.NewFileName, extension);
this.GreateMiniImage(filePath, newFilePath, this.MaxWith, this.MaxHeight);
}
#endregion
#endregion
#region 删除图片
if (oldFileName.Trim() != string.Empty)
{
this.Delete(savePath, oldFileName, true);
}
#endregion
//设置状态为0,表示上传成功
state = 0;
//返回文件名
return string.Format("{0}{1}", this.NewFileName, extension);
}
catch
{
//发生严重错误,设置状态为-1,返回旧文件名
state = -1;
return oldFileName;
}
}
#endregion
#region 删除文件
/// <summary>
/// 删除指定文件
/// </summary>
/// <param name="savePath">文件夹名</param>
/// <param name="fileName">文件名</param>
/// <param name="delSmallPic">是否删除小图</param>
public string Delete(string savePath, string fileName, bool delSmallPic)
{
//删除状态
string msg = string.Empty;
string folder = savePath;
folder = folder == null ? "other" : folder;//没有找到则默认为other文件夹
string delPath = string.Format("{0}/{1}", folder, this.BigChildPath);
msg=this.Del(delPath, fileName);
if (delSmallPic)
{
delPath = string.Format("{0}/{1}", folder, this.SmallChildPath);
this.Del(delPath, fileName);//删除小图(删除小图时不记录状态)
}
return msg;
}
private int deleteCount = 0;
/// <summary>
/// 删除核心代码
/// </summary>
/// <param name="folder"></param>
/// <param name="fileName"></param>
/// <returns></returns>
private string Del(string folder, string fileName)
{
string msg = "文件不存在!";
fileName = this.ClearFileFolder(fileName);
string delPath = System.Web.HttpContext.Current.Server.MapPath("~/");
string delPicPath = string.Empty;
try
{
delPicPath = string.Format("{0}/{1}/{2}", delPath, folder, fileName);
if (File.Exists(delPicPath))//如果该文件存在，则删除
{
deleteCount ;
File.Delete(delPicPath);
msg = "删除成功!";
}
}
catch
{
if (deleteCount < 100)//为避免因资源被占用删除不了数据 所以在此循环100次
{
msg = "删除失败,请与站长联系!";
Del(folder, fileName);
}
}
return msg;
}
#endregion
#region 其它
/// <summary>
/// 删除指定文件夹中所有文件
/// </summary>
/// <param name="directoryPath"></param>
public void DeleteByDirectory(string directoryPath)
{
if (Directory.Exists(directoryPath))
{
DirectoryInfo dir = Directory.CreateDirectory(directoryPath);
foreach (FileInfo fileInfo in dir.GetFiles())
{
fileInfo.Delete();
}
dir.Delete(false);
}
}
/// <summary>
/// 删除指定文件夹中所有文件
/// </summary>
/// <param name="savePath"></param>
public void DeleteByDirectory(string savePath, string directoryPath)
{
string folder = savePath;
directoryPath = string.Format("{0}/{1}/{2}", this.Path, folder, directoryPath);
if (Directory.Exists(directoryPath))
{
DirectoryInfo dir = Directory.CreateDirectory(directoryPath);
foreach (FileInfo fileInfo in dir.GetFiles())
{
fileInfo.Delete();
}
dir.Delete(false);
}
}
#endregion
#region 添加水印
/// <summary>
/// 添加图片水印
/// </summary>
/// <param name="oldpath">原图片绝对地址</param>
/// <param name="newpath">新图片放置的绝对地址</param>
private void addWaterMark(string oldpath, string newpath)
{
try
{
System.Drawing.Image image = System.Drawing.Image.FromFile(oldpath);
Bitmap b = new Bitmap(image.Width, image.Height, PixelFormat.Format24bppRgb);
Graphics g = Graphics.FromImage(b);
g.Clear(Color.White);
g.SmoothingMode = SmoothingMode.HighQuality;
g.InterpolationMode = InterpolationMode.High;
g.DrawImage(image, 0, 0, image.Width, image.Height);
if (IsWaterMark)
{
switch (this.WMType)
{
case SWFWaterMarkType.WM_IMAGE: //水印图片
this.addWatermarkImage(g, _waterMarkImgPath, WMLocation, image.Width, image.Height);
break;
case SWFWaterMarkType.WM_TEXT://水印文字
this.addWatermarkText(g, this.WaterMarkText, WMLocation, image.Width, image.Height);
break;
}
#region 降低图片质量
System.Drawing.Imaging.ImageCodecInfo encoder = GetEncoderInfo("image/jpeg");
System.Drawing.Imaging.EncoderParameters encoderParams = new System.Drawing.Imaging.EncoderParameters(1);
encoderParams.Param[0] = new System.Drawing.Imaging.EncoderParameter(System.Drawing.Imaging.Encoder.Quality, (long)80);
#endregion
b.Save(newpath, encoder, encoderParams);
encoderParams.Dispose();
b.Dispose();
image.Dispose();
}
}
catch
{
if (File.Exists(oldpath))
{
File.Delete(oldpath);
}
}
finally
{
if (File.Exists(oldpath))
{
File.Delete(oldpath);
}
}
}
/// <summary>
/// 加水印图片
/// </summary>
/// <param name="picture">imge 对象</param>
/// <param name="WaterMarkPicPath">水印图片的地址</param>
/// <param name="_watermarkPosition">水印位置</param>
/// <param name="_width">被加水印图片的宽</param>
/// <param name="_height">被加水印图片的高</param>
private void addWatermarkImage(Graphics picture, string WaterMarkPicPath, SWFWaterMarkLocation location, int _width, int _height)
{
Image watermark = new Bitmap(WaterMarkPicPath);
ImageAttributes imageAttributes = new ImageAttributes();
ColorMap colorMap = new ColorMap();
colorMap.OldColor = Color.FromArgb(255, 0, 255, 0);
colorMap.NewColor = Color.FromArgb(0, 0, 0, 0);
ColorMap[] remapTable = { colorMap };
imageAttributes.SetRemapTable(remapTable, ColorAdjustType.Bitmap);
float[][] colorMatrixElements = {
new float[] {1.0f, 0.0f, 0.0f, 0.0f, 0.0f},
new float[] {0.0f, 1.0f, 0.0f, 0.0f, 0.0f},
new float[] {0.0f, 0.0f, 1.0f, 0.0f, 0.0f},
new float[] {0.0f, 0.0f, 0.0f, 0.3f, 0.0f},
new float[] {0.0f, 0.0f, 0.0f, 0.0f, 1.0f}
};
ColorMatrix colorMatrix = new ColorMatrix(colorMatrixElements);
//设置透明色
//imageAttributes.SetColorMatrix(colorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
int xpos = 0;
int ypos = 0;
int WatermarkWidth = 0;
int WatermarkHeight = 0;
double bl = 1d;
//计算水印图片的比率
//取背景的1/4宽度来比较
if ((_width > watermark.Width * 4) && (_height > watermark.Height * 4))
{
bl = 1;
}
else if ((_width > watermark.Width * 4) && (_height < watermark.Height * 4))
{
bl = Convert.ToDouble(_height / 4) / Convert.ToDouble(watermark.Height);
}
else
if ((_width < watermark.Width * 4) && (_height > watermark.Height * 4))
{
bl = Convert.ToDouble(_width / 4) / Convert.ToDouble(watermark.Width);
}
else
{
if ((_width * watermark.Height) > (_height * watermark.Width))
{
bl = Convert.ToDouble(_height / 4) / Convert.ToDouble(watermark.Height);
}
else
{
bl = Convert.ToDouble(_width / 4) / Convert.ToDouble(watermark.Width);
}
}
WatermarkWidth = Convert.ToInt32(watermark.Width * bl);
WatermarkHeight = Convert.ToInt32(watermark.Height * bl);
switch (location)
{
case SWFWaterMarkLocation.WM_TOP_LEFT:
xpos = 10;
ypos = 10;
break;
case SWFWaterMarkLocation.WM_TOP_RIGHT:
xpos = _width - WatermarkWidth - 10;
ypos = 10;
break;
case SWFWaterMarkLocation.WM_BOTTOM_RIGHT:
xpos = _width - WatermarkWidth - 10;
ypos = _height - WatermarkHeight - 10;
break;
case SWFWaterMarkLocation.WM_BOTTOM_LEFT:
xpos = 10;
ypos = _height - WatermarkHeight - 10;
break;
}
picture.DrawImage(watermark, new Rectangle(xpos, ypos, WatermarkWidth, WatermarkHeight), 0, 0, watermark.Width, watermark.Height, GraphicsUnit.Pixel, imageAttributes);
watermark.Dispose();
imageAttributes.Dispose();
}
/// <summary>
/// 加水印文字
/// </summary>
/// <param name="picture">imge 对象</param>
/// <param name="_watermarkText">水印文字内容</param>
/// <param name="_watermarkPosition">水印位置</param>
/// <param name="_width">被加水印图片的宽</param>
/// <param name="_height">被加水印图片的高</param>
private void addWatermarkText(Graphics picture, string _watermarkText, SWFWaterMarkLocation location, int _width, int _height)
{
int[] sizes = new int[] { 16, 14, 12, 10, 8, 6, 4 };
Font crFont = null;
SizeF crSize = new SizeF();
for (int i = 0; i < 7; i )
{
crFont = new Font("arial", sizes[i], FontStyle.Bold);
crSize = picture.MeasureString(_watermarkText, crFont);
if ((ushort)crSize.Width < (ushort)_width)
break;
}
float xpos = 0;
float ypos = 0;
switch (location)
{
case SWFWaterMarkLocation.WM_TOP_LEFT:
xpos = ((float)_width * (float).01) (crSize.Width / 2);
ypos = (float)_height * (float).01;
break;
case SWFWaterMarkLocation.WM_TOP_RIGHT:
xpos = ((float)_width * (float).99) - (crSize.Width / 2);
ypos = (float)_height * (float).01;
break;
case SWFWaterMarkLocation.WM_BOTTOM_RIGHT:
xpos = ((float)_width * (float).99) - (crSize.Width / 2);
ypos = ((float)_height * (float).99) - crSize.Height;
break;
case SWFWaterMarkLocation.WM_BOTTOM_LEFT:
xpos = ((float)_width * (float).01) (crSize.Width / 2);
ypos = ((float)_height * (float).99) - crSize.Height;
break;
}
StringFormat StrFormat = new StringFormat();
StrFormat.Alignment = StringAlignment.Center;
SolidBrush semiTransBrush2 = new SolidBrush(Color.FromArgb(153, 0, 0, 0));
picture.DrawString(_watermarkText, crFont, semiTransBrush2, xpos 1, ypos 1, StrFormat);
SolidBrush semiTransBrush = new SolidBrush(Color.FromArgb(153, 255, 255, 255));
picture.DrawString(_watermarkText, crFont, semiTransBrush, xpos, ypos, StrFormat);
semiTransBrush2.Dispose();
semiTransBrush.Dispose();
}
/// <summary>
/// 生成缩略图
/// </summary>
/// <param name="oldpath">原图片地址</param>
/// <param name="newpath">新图片地址</param>
/// <param name="tWidth">缩略图的宽</param>
/// <param name="tHeight">缩略图的高</param>
private void GreateMiniImage(string oldpath, string newpath, int tWidth, int tHeight)
{
try
{
System.Drawing.Image image = System.Drawing.Image.FromFile(oldpath);
#region 原有代码(图片尺寸等比缩放)
//double bl = 1d;
//if ((image.Width <= image.Height) && (tWidth >= tHeight))
//{
// bl = Convert.ToDouble(image.Height) / Convert.ToDouble(tHeight);
//}
//else if ((image.Width > image.Height) && (tWidth < tHeight))
//{
// bl = Convert.ToDouble(image.Width) / Convert.ToDouble(tWidth);
//}
//else
// if ((image.Width <= image.Height) && (tWidth <= tHeight))
// {
// if (image.Height / tHeight >= image.Width / tWidth)
// {
// bl = Convert.ToDouble(image.Width) / Convert.ToDouble(tWidth);
// }
// else
// {
// bl = Convert.ToDouble(image.Height) / Convert.ToDouble(tHeight);
// }
// }
// else
// {
// if (image.Height / tHeight >= image.Width / tWidth)
// {
// bl = Convert.ToDouble(image.Height) / Convert.ToDouble(tHeight);
// }
// else
// {
// bl = Convert.ToDouble(image.Width) / Convert.ToDouble(tWidth);
// }
// }
//Bitmap b = new Bitmap(image, Convert.ToInt32(image.Width / bl), Convert.ToInt32(image.Height / bl));
#endregion
#region 2010-03-29 改造
int imgWidth = image.Width;
int imgHeight = image.Height;
int newWidth = 0;
int newHeight = 0;
if (imgWidth > tWidth)
{
newWidth = tWidth;
newHeight = tWidth * imgHeight / imgWidth;
if (newHeight > tHeight)
{
newWidth = tHeight * newWidth / newHeight;
newHeight = tHeight;
}
}
else if (imgHeight > tHeight)
{
newHeight = tHeight;
newWidth = tHeight * imgWidth / imgHeight;
if (newWidth > tWidth)
{
newHeight = tWidth * newHeight / newWidth;
newWidth = tWidth;
}
}
else
{
newWidth = imgWidth;
newHeight = imgHeight;
}
Bitmap b = new Bitmap(image, newWidth, newHeight);
#endregion
b.Save(newpath);
b.Dispose();
image.Dispose();
}
catch
{
}
}
#endregion
public static string GetSmallPicName(string picName)
{
return SWFWebConfigManage.GetByAppSettingsKey("WaterMarkPath") picName;//5~1-a-s-p-x
}
}
}
标签： 上传
好例子网口号：伸出你的我的手 — 分享！
小贴士
感谢您为本站写下的评论，您的评论对其它用户来说具有重要的参考价值，所以请认真填写。
- 类似“顶”、“沙发”之类没有营养的文字，对勤劳贡献的楼主来说是令人沮丧的反馈信息。
- 相信您也不想看到一排文字/表情墙，所以请不要反馈意义不大的重复字符，也请尽量不要纯表情的回复。
- 提问之前请再仔细看一遍楼主的说明，或许是您遗漏了。
- 请勿到处挖坑绊人、招贴广告。既占空间让人厌烦，又没人会搭理，于人于己都无利。
关于好例子网
本站旨在为广大IT学习爱好者提供一个非营利性互相学习交流分享平台。本站所有资源都可以被免费获取学习研究。本站资源来自网友分享，对搜索内容的合法性不具有预见性、识别性、控制性，仅供学习研究，请务必在下载后24小时内给予删除，不得用于其他任何用途，否则后果自负。基于互联网的特殊性，平台无法对用户传输的作品、信息、内容的权属或合法性、安全性、合规性、真实性、科学性、完整权、有效性等进行实质审查；无论平台是否已进行审查，用户均应自行承担因其传输的作品、信息、内容而可能或已经产生的侵权或权属纠纷等法律责任。本站所有资源不代表本站的观点或立场，基于网友分享，根据中国法律《信息网络传播权保护条例》第二十二与二十三条之规定，若资源存在侵权或相关问题请联系本站客服人员，点此联系我们。关于更多版权及免责申明参见 版权及免责申明
网友评论
我要评论