我正在尝试使用MessagingToolkit来解码C#/ ASP.NET中的图像。我已经设法使用这个包编码一个qr,但是当我尝试解码时,使用下面的代码会出现2个错误(在页面底部)
我认为这是因为我在上传后没有正确获取图像,但有人可能会指出我出错的地方。感谢。
protected void CreateCode_OnClick(object sender, EventArgs e)
{
string path = "C:\\Users\\Wayneio\\Documents\\Visual Studio 2012\\Projects\\BAMSystem\\BAMSystem\\";
if (QRUpload.HasFiles == true)
{
FileInfo fi = new FileInfo(QRUpload.FileName);
string extA = fi.Extension;
if (extA == ".jpg" || extA == ".png")
{
QRCodeDecoder decoder = new QRCodeDecoder();
QRUpload.SaveAs(path + QRUpload.FileName);
System.Drawing.Image myImg = System.Drawing.Image.FromFile(path + QRUpload.FileName);
decoder.Decode(myImg);
}
else
{
error.Text = "You have uploaded a " + extA + " file. Please upload either a PNG or a JPG";
}
}
else
{
error.Text = "You have not uploaded an image.";
}
}
ERROR1:
Error 2 Argument 1: cannot convert from 'System.Drawing.Image' to 'MessagingToolkit.QRCode.Codec.Data.QRCodeImage' c:\users\wayneio\documents\visual studio 2012\Projects\BAMSystem\BAMSystem\default.aspx.cs 38 35 BAMSystem
误差2:
Error 1 The best overloaded method match for 'MessagingToolkit.QRCode.Codec.QRCodeDecoder.Decode(MessagingToolkit.QRCode.Codec.Data.QRCodeImage)' has some invalid arguments c:\users\wayneio\documents\visual studio 2012\Projects\BAMSystem\BAMSystem\default.aspx.cs 38 20 BAMSystem
如果有人有关于这个MessagingToolkit QR包的文档,那么它将是有用的
答案 0 :(得分:1)
解码接受“位图”类型图像。
System.Drawing.Bitmap myImg = new System.Drawing.Bitmap(FileName);
Dictionary<DecodeOptions, object> decodingOptions = new Dictionary<DecodeOptions, object>();
List<BarcodeFormat> possibleFormats = new List<BarcodeFormat>(10);
possibleFormats.Add(BarcodeFormat.DataMatrix);
possibleFormats.Add(BarcodeFormat.QRCode);
possibleFormats.Add(BarcodeFormat.PDF417);
possibleFormats.Add(BarcodeFormat.Aztec);
possibleFormats.Add(BarcodeFormat.UPCE);
possibleFormats.Add(BarcodeFormat.UPCA);
possibleFormats.Add(BarcodeFormat.Code128);
possibleFormats.Add(BarcodeFormat.Code39);
possibleFormats.Add(BarcodeFormat.ITF14);
possibleFormats.Add(BarcodeFormat.EAN8);
possibleFormats.Add(BarcodeFormat.EAN13);
possibleFormats.Add(BarcodeFormat.RSS14);
possibleFormats.Add(BarcodeFormat.RSSExpanded);
possibleFormats.Add(BarcodeFormat.Codabar);
possibleFormats.Add(BarcodeFormat.MaxiCode);
decodingOptions.Add(DecodeOptions.TryHarder, true);
decodingOptions.Add(DecodeOptions.PossibleFormats, possibleFormats);
Result decodedResult = decoder.Decode(myImg, decodingOptions);
if (decodedResult != null)
{
//.. success
}
此外,您还可以省略“decodingOptions”选项参数,因为解码器还具有重载Decode(位图图像)。
System.Drawing.Bitmap myImg = new System.Drawing.Bitmap(FileName);
Result decodedResult = decoder.Decode(myImg);
if (decodedResult != null)
{
//.. success
}
如果您只想进行QRCode解码,
System.Drawing.Bitmap myImg = new System.Drawing.Bitmap(FileName);
Dictionary<DecodeOptions, object> decodingOptions = new Dictionary<DecodeOptions, object>();
List<BarcodeFormat> possibleFormats = new List<BarcodeFormat>();
possibleFormats.Add(BarcodeFormat.QRCode);
decodingOptions.Add(DecodeOptions.TryHarder, true);
decodingOptions.Add(DecodeOptions.PossibleFormats, possibleFormats);
Result decodedResult = decoder.Decode(myImg, decodingOptions);
if (decodedResult != null)
{
//.. success
}
您可以在此处找到文档和代码 http://platform.twit88.com/projects/show/mt-barcode
示例代码..download here ..还有演示代码 http://platform.twit88.com/projects/mt-barcode/files
这里的代码项目
http://www.codeproject.com/Articles/20574/Open-Source-QRCode-Library