高校手机签到系统——第一部分Authority权限系统（上）
高校手机签到系统——第一部分Authority权限系统（下）
关于zxing.net的使用网上已有很多说明，可是在mvc模式下，怎么保存生成的图片返回链接？
使用zxing生成bitmap:
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BarcodeWriter writer = new
BarcodeWriter
{
Format = BarcodeFormat.QR_CODE,
Options = new
EncodingOptions
{
Width = 400,
Height = 400
}
};
string
time = DateTime.Now.ToString();
Bitmap bitmap = writer.Write(id + "|"
+ time);
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此bitmap有一save方法Image.Save (String, ImageCodecInfo, EncoderParameters)，参数分别是路径，编码器，以及编码器参数。
初始化编码器ImageCodecInfo imageCodecInfo = (from e in ImageCodecInfo.GetImageEncoders() where e.MimeType == "image/jpeg" select e).First();
初始化编码器参数EncoderParameters encoderParameters = new
EncoderParameters(1);
EncoderParameter encoderParameter = new EncoderParameter(Encoder.Quality,
75L);
接下来保存到相应的路径即可。完整的代码：
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public
ActionResult LoadQrcode(string
id)
{
BarcodeWriter writer = new
BarcodeWriter
{
Format = BarcodeFormat.QR_CODE,
Options = new
EncodingOptions
{
Width = 400,
Height = 400
}
};
string
time = DateTime.Now.ToString();
Bitmap bitmap = writer.Write(id + "|"
+ time);
ImageCodecInfo imageCodecInfo = (from
e in
ImageCodecInfo.GetImageEncoders() where
e.MimeType == "image/jpeg"
select e).First();
EncoderParameters encoderParameters = new
EncoderParameters(1);
EncoderParameter encoderParameter = new
EncoderParameter(Encoder.Quality, 75L);
encoderParameters.Param[0] = encoderParameter;
if
(Directory.Exists(Server.MapPath("/Images/"
+ id + "/")))
{
FileInfo[] files = new
DirectoryInfo(Server.MapPath("/Images/"
+ id + "/")).GetFiles();
foreach
(FileInfo fi in
files)
System.IO.File.Delete(Path.Combine(Server.MapPath("/Images/"
+ id + "/"), fi.Name));
}
else
Directory.CreateDirectory(Server.MapPath("/Images/"
+ id + "/"));
bitmap.Save(Path.Combine(Server.MapPath("/Images/"
+ id + "/"), DateTime.Now.Date.ToFileTimeUtc()+ ".jpeg"), imageCodecInfo, encoderParameters);
return
Json("/Images/"
+ id + "/"
+ DateTime.Now.Date.ToFileTimeUtc() + ".jpeg", JsonRequestBehavior.AllowGet);
}
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