急急急!!.net 批量上传图片并且加上水印紧急求助!有什么思路请大家帮帮忙,有demo最好不过了.在线等

打中单的ADC 程序员  2018-07-10 06:01:56
急急急!!.net 批量上传图片并且加上水印紧急求助!有什么思路请大家帮帮忙,有demo最好不过了.在线等
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打中单的ADC 2018-07-11
这是定义的方法类吗?
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JeruSalem 2018-07-11

using System;
using System.Collections;
using System.IO;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;

namespace SufeiUtil
{
public class ImageClass
{
public ImageClass()
{ }

#region 缩略图
/// <summary>
/// 生成缩略图
/// </summary>
/// <param name="originalImagePath">源图路径(物理路径)</param>
/// <param name="thumbnailPath">缩略图路径(物理路径)</param>
/// <param name="width">缩略图宽度</param>
/// <param name="height">缩略图高度</param>
/// <param name="mode">生成缩略图的方式</param>
public static void MakeThumbnail(string originalImagePath, string thumbnailPath, int width, int height, string mode)
{
System.Drawing.Image originalImage = System.Drawing.Image.FromFile(originalImagePath);

int towidth = width;
int toheight = height;

int x = 0;
int y = 0;
int ow = originalImage.Width;
int oh = originalImage.Height;

switch (mode)
{
case "HW": //指定高宽缩放(可能变形)
break;
case "W": //指定宽,高按比例
toheight = originalImage.Height * width / originalImage.Width;
break;
case "H": //指定高,宽按比例
towidth = originalImage.Width * height / originalImage.Height;
break;
case "Cut": //指定高宽裁减(不变形)
if ((double)originalImage.Width / (double)originalImage.Height > (double)towidth / (double)toheight)
{
oh = originalImage.Height;
ow = originalImage.Height * towidth / toheight;
y = 0;
x = (originalImage.Width - ow) / 2;
}
else
{
ow = originalImage.Width;
oh = originalImage.Width * height / towidth;
x = 0;
y = (originalImage.Height - oh) / 2;
}
break;
default:
break;
}

//新建一个bmp图片
System.Drawing.Image bitmap = new System.Drawing.Bitmap(towidth, toheight);

//新建一个画板
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);

//设置高质量插值法
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;

//设置高质量,低速度呈现平滑程度
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;

//清空画布并以透明背景色填充
g.Clear(System.Drawing.Color.Transparent);

//在指定位置并且按指定大小绘制原图片的指定部分
g.DrawImage(originalImage, new System.Drawing.Rectangle(0, 0, towidth, toheight), new System.Drawing.Rectangle(x, y, ow, oh), System.Drawing.GraphicsUnit.Pixel);

try
{
//以jpg格式保存缩略图
bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg);
}
catch (System.Exception e)
{
throw e;
}
finally
{
originalImage.Dispose();
bitmap.Dispose();
g.Dispose();
}
}
#endregion

#region 图片水印
/// <summary>
/// 图片水印处理方法
/// </summary>
/// <param name="path">需要加载水印的图片路径(绝对路径)</param>
/// <param name="waterpath">水印图片(绝对路径)</param>
/// <param name="location">水印位置(传送正确的代码)</param>
public static string ImageWatermark(string path, string waterpath, string location)
{
string kz_name = Path.GetExtension(path);
if (kz_name == ".jpg" || kz_name == ".bmp" || kz_name == ".jpeg")
{
DateTime time = DateTime.Now;
string filename = "" + time.Year.ToString() + time.Month.ToString() + time.Day.ToString() + time.Hour.ToString() + time.Minute.ToString() + time.Second.ToString() + time.Millisecond.ToString();
Image img = Bitmap.FromFile(path);
Image waterimg = Image.FromFile(waterpath);
Graphics g = Graphics.FromImage(img);
ArrayList loca = GetLocation(location, img, waterimg);
g.DrawImage(waterimg, new Rectangle(int.Parse(loca[0].ToString()), int.Parse(loca[1].ToString()), waterimg.Width, waterimg.Height));
waterimg.Dispose();
g.Dispose();
string newpath = Path.GetDirectoryName(path) + filename + kz_name;
img.Save(newpath);
img.Dispose();
File.Copy(newpath, path, true);
if (File.Exists(newpath))
{
File.Delete(newpath);
}
}
return path;
}

/// <summary>
/// 图片水印位置处理方法
/// </summary>
/// <param name="location">水印位置</param>
/// <param name="img">需要添加水印的图片</param>
/// <param name="waterimg">水印图片</param>
private static ArrayList GetLocation(string location, Image img, Image waterimg)
{
ArrayList loca = new ArrayList();
int x = 0;
int y = 0;

if (location == "LT")
{
x = 10;
y = 10;
}
else if (location == "T")
{
x = img.Width / 2 - waterimg.Width / 2;
y = img.Height - waterimg.Height;
}
else if (location == "RT")
{
x = img.Width - waterimg.Width;
y = 10;
}
else if (location == "LC")
{
x = 10;
y = img.Height / 2 - waterimg.Height / 2;
}
else if (location == "C")
{
x = img.Width / 2 - waterimg.Width / 2;
y = img.Height / 2 - waterimg.Height / 2;
}
else if (location == "RC")
{
x = img.Width - waterimg.Width;
y = img.Height / 2 - waterimg.Height / 2;
}
else if (location == "LB")
{
x = 10;
y = img.Height - waterimg.Height;
}
else if (location == "B")
{
x = img.Width / 2 - waterimg.Width / 2;
y = img.Height - waterimg.Height;
}
else
{
x = img.Width - waterimg.Width;
y = img.Height - waterimg.Height;
}
loca.Add(x);
loca.Add(y);
return loca;
}
#endregion

#region 文字水印
/// <summary>
/// 文字水印处理方法
/// </summary>
/// <param name="path">图片路径(绝对路径)</param>
/// <param name="size">字体大小</param>
/// <param name="letter">水印文字</param>
/// <param name="color">颜色</param>
/// <param name="location">水印位置</param>
public static string LetterWatermark(string path, int size, string letter, Color color, string location)
{
#region

string kz_name = Path.GetExtension(path);
if (kz_name == ".jpg" || kz_name == ".bmp" || kz_name == ".jpeg")
{
DateTime time = DateTime.Now;
string filename = "" + time.Year.ToString() + time.Month.ToString() + time.Day.ToString() + time.Hour.ToString() + time.Minute.ToString() + time.Second.ToString() + time.Millisecond.ToString();
Image img = Bitmap.FromFile(path);
Graphics gs = Graphics.FromImage(img);
ArrayList loca = GetLocation(location, img, size, letter.Length);
Font font = new Font("宋体", size);
Brush br = new SolidBrush(color);
gs.DrawString(letter, font, br, float.Parse(loca[0].ToString()), float.Parse(loca[1].ToString()));
gs.Dispose();
string newpath = Path.GetDirectoryName(path) + filename + kz_name;
img.Save(newpath);
img.Dispose();
File.Copy(newpath, path, true);
if (File.Exists(newpath))
{
File.Delete(newpath);
}
}
return path;

#endregion
}

/// <summary>
/// 文字水印位置的方法
/// </summary>
/// <param name="location">位置代码</param>
/// <param name="img">图片对象</param>
/// <param name="width">宽(当水印类型为文字时,传过来的就是字体的大小)</param>
/// <param name="height">高(当水印类型为文字时,传过来的就是字符的长度)</param>
private static ArrayList GetLocation(string location, Image img, int width, int height)
{
#region

ArrayList loca = new ArrayList(); //定义数组存储位置
float x = 10;
float y = 10;

if (location == "LT")
{
loca.Add(x);
loca.Add(y);
}
else if (location == "T")
{
x = img.Width / 2 - (width * height) / 2;
loca.Add(x);
loca.Add(y);
}
else if (location == "RT")
{
x = img.Width - width * height;
}
else if (location == "LC")
{
y = img.Height / 2;
}
else if (location == "C")
{
x = img.Width / 2 - (width * height) / 2;
y = img.Height / 2;
}
else if (location == "RC")
{
x = img.Width - height;
y = img.Height / 2;
}
else if (locati
回复
guwei4037 2018-07-11
上传图片 http://www.cnblogs.com/guwei4037/p/8459058.html,加一步就是上传一张图片后用gdi+绘制水印 http://www.cnblogs.com/guwei4037/p/5639494.html
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