zoukankan
html css js c++ java
GDI+中对图片的裁剪
CutImage
1
void
CutImage(HttpPostedFile post,
string
ppuid,
out
string
imagename)
2
{
3
System.Drawing.Image SourceImg
=
System.Drawing.Image.FromStream(post.InputStream);
4
if
(SourceImg.Height
>
ConfigHelper.UserFaceMaxHeight)
5
{
6
this
._lbl_upload_msg.Text
=
"
最大高度不得大于
"
+
ConfigHelper.UserFaceMaxHeight;
7
return
;
8
}
9
if
(SourceImg.Width
>
ConfigHelper.UserFaceMaxWidth)
10
{
11
this
._lbl_upload_msg.Text
=
"
最大宽度不得大于
"
+
ConfigHelper.UserFaceMaxWidth;
12
return
;
13
}
14
ImageFormat format
=
getImageformat(System.IO.Path.GetExtension(post.FileName));
15
string
filename
=
ppuid
+
"
.
"
+
format.ToString();
16
imagename
=
filename;
17
18
if
(
!
UserFaceDir.EndsWith(
"
\\
"
))
19
UserFaceDir
=
UserFaceDir
+
"
\\
"
;
20
filename
=
UserFaceDir
+
filename;
21
int
SourceImgWidth
=
SourceImg.Width;
22
int
SourceImgHeight
=
SourceImg.Height;
23
if
((SourceImgWidth
!=
ConfigHelper.UserFaceWidth)
&&
(SourceImgHeight
!=
ConfigHelper.UserFaceHeight))
24
{
25
//
如果宽高比例为1:1,则直接构成缩略图
26
if
(((Double)SourceImgWidth
/
SourceImgHeight)
==
1
)
27
{
28
System.Drawing.Image thumbimg
=
SourceImg.GetThumbnailImage(ConfigHelper.UserFaceWidth, ConfigHelper.UserFaceHeight,
null
, IntPtr.Zero);
29
thumbimg.Save(filename, format);
30
thumbimg.Dispose();
31
SourceImg.Dispose();
32
return
;
33
}
34
Bitmap bit
=
new
Bitmap(SourceImg);
35
Rectangle rec
=
new
Rectangle();
//
构造一个Rectangle类,一个矩形
36
rec.Width
=
ConfigHelper.UserFaceWidth;
37
rec.Height
=
ConfigHelper.UserFaceHeight;
38
if
(SourceImgWidth
>
rec.Width)
39
rec.X
=
(SourceImgWidth
-
rec.Width)
/
2
;
40
else
41
{
42
rec.X
=
0
;
43
rec.Width
=
SourceImg.Width;
44
}
45
if
(SourceImgHeight
>
rec.Height)
46
rec.Y
=
(SourceImgHeight
-
rec.Height)
/
2
;
47
else
48
{
49
rec.Y
=
0
;
50
rec.Height
=
SourceImg.Height;
51
}
52
53
try
54
{
55
//
这里就是把从上传过程中构造的bitmap克隆一份,并按定义好的矩形裁剪
56
bit.Clone(rec, PixelFormat.DontCare).Save(filename, format);
57
}
58
catch
(Exception ex)
59
{
60
this
._lbl_upload_msg.Text
=
ex.Message;
61
return
;
62
}
63
finally
64
{
65
bit.Dispose();
66
SourceImg.Dispose();
67
}
68
}
69
}
70
查看全文
相关阅读:
MD5加密
HDU 1800 Flying to the Mars(Trie字典树 upper_bound)
POJ 3624 Charm Bracelet(01背包 基础)
hdu 1005 (规律 循环节)
ZOJ 3710 friends(暴力 枚举 水)
zoj 3714 Java Beans(枚举 水)
hdu 1108 最小公倍数(数论基础 水)
POJ 1797 Heavy Transportation(dijkstra )
poj 3984 迷宫问题(bfs 打印路径)
报数游戏(模拟 枚举)
原文地址:https://www.cnblogs.com/0000/p/1611248.html
最新文章
LeetCode算法题-Find All Numbers Disappeared in an Array(Java实现)
LeetCode算法题-Number of Boomerangs(Java实现)
LeetCode算法题-String Compression(Java实现)
LeetCode算法题-Arranging Coins(Java实现)
LeetCode算法题-Find All Anagrams in a String(Java实现)
LeetCode算法题-Path Sum III(Java实现)
LeetCode算法题-Number of Segments in a String(Java实现)
LeetCode算法题-N-ary Tree Level Order Traversal(Java实现)
LeetCode算法题-Construct Quad Tree(Java实现)
LeetCode算法题-Add Strings(Java实现)
热门文章
用路由系统生成输出URL 在视图中生成输出URL 高级路由特性 精通ASP-NET-MVC-5-弗瑞曼
转载 Appstore 上传被拒原因及解释
Json数据与Json数据转换
字典转换成NSString(NSJson)
AppStore 上架注意事项及错误修改
iOS远程推送1
改变文字左缩进
基本的函数
改变图片的颜色,UIImage改变颜色
二进制计算程序
Copyright © 2011-2022 走看看