Asp.net mvc实时生成缩率图到硬盘

///<summary>

///生成图片缩率图Action

///</summary>

///<paramname="p">原图url</param>

///<paramname="id">图片尺寸以及生成缩率图的类型</param>

///<returns></returns>

[ValidateInput(

false

)]

public

ActionResultIndex(

string

p,

string

id)

{

if

(

string

.IsNullOrEmpty(p))

{

return

new

HttpStatusCodeResult(404);

}

string

oPath=Regex.Replace(p,

@"http[s]?://(.*?)/"

,

"/"

,RegexOptions.IgnoreCase);

int

?oWidth=200,oHeight=200;

int

cutMode=3;

string

pPath;

string

oDir;

if

(!

string

.IsNullOrEmpty(id))

{

string

[]ss=id.Split(

new

char

[]{

'_'

},StringSplitOptions.RemoveEmptyEntries);

if

(ss.Length<2)

{

return

new

HttpStatusCodeResult(404);

}

if

(ss.Length>2)

{

cutMode=

int

.Parse(ss[2]);

}

oPath=oPath.Insert(oPath.LastIndexOf(

'/'

)+1,

string

.Format(

"{0}_{1}_{2}_"

,ss[0],ss[1],cutMode));

oWidth=

int

.Parse(ss[0]);

oHeight=

int

.Parse(ss[1]);

}

pPath=Server.MapPath(oPath);

oDir=Path.GetDirectoryName(pPath);

if

(!System.IO.File.Exists(pPath))

{

byte

[]imagebytes=FileHelper.DownLoadFile(p);

if

(!Directory.Exists(oDir))

{

Directory.CreateDirectory(oDir);

}

FileHelper.MakeThumbnail(FileHelper.BytToImg(imagebytes),oWidth.Value,oHeight.Value,(ThumbnailMode)cutMode,pPath,

true

);

}

return

File(pPath,FileHelper.GetContentTypeByExtension(Path.GetExtension(pPath).ToLower()));

}