用ZXing.net生成条形码 [英] Generate barcode with ZXing.net

问题描述

我正在尝试使用ZXing.NET为点网核心asp.net应用程序生成条形码.我不知道如何用条形码显示文本，而且文档似乎真的很缺乏.有谁知道如何使它工作?

I'm trying to generate a barcode using ZXing.NET for dot net core asp.net application. I can't figure out how to display text with the barcode and documentation seems to be really, really lacking. Does anyone have an idea how to make it work?

这是我拥有的代码(大部分取自SO上的另一篇文章):

This is the code I have (mostly taken from another post on SO):

BarcodeWriterPixelData writer = new BarcodeWriterPixelData()
{
    Format = BarcodeFormat.CODE_128,
    Options = new EncodingOptions
    {
        Height = 400,
        Width = 800,
        PureBarcode = false, // this should indicate that the text should be displayed, in theory. Makes no difference, though.
        Margin = 10
    }
};

var pixelData = writer.Write("test text");

using (var bitmap = new Bitmap(pixelData.Width, pixelData.Height, System.Drawing.Imaging.PixelFormat.Format32bppRgb))
{
    using (var ms = new System.IO.MemoryStream())
    {
        var bitmapData = bitmap.LockBits(new Rectangle(0, 0, pixelData.Width, pixelData.Height), System.Drawing.Imaging.ImageLockMode.WriteOnly, System.Drawing.Imaging.PixelFormat.Format32bppRgb);
        try
        {
            System.Runtime.InteropServices.Marshal.Copy(pixelData.Pixels, 0, bitmapData.Scan0, pixelData.Pixels.Length);
        }
        finally
        {
            bitmap.UnlockBits(bitmapData);
        }

        bitmap.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
        return File(ms.ToArray(), "image/jpeg");
    }
}

这会给我一个条形码，但没有内容.

This gets me a barcode, but no content.

或者，更好/更易于使用/文档更好的库的建议也将受到赞赏.

Or, suggestions of better/easier to use/better-documented libraries would be appreciated too.

推荐答案

您无需手动将这些像素数据复制到另一个流中.始终喜欢使用接口提供的方法，即 Save()方法.

You don't need to copy those pixels data to another stream manually. Always prefer to using methods provided by the interface , namely the Save() method.

public void YourActionMethod()
{
    BarcodeWriter writer = new BarcodeWriter(){
        Format = BarcodeFormat.CODE_128,
        Options = new EncodingOptions {
            Height = 400,
            Width = 800,
            PureBarcode = false,
            Margin = 10,
        },
    };

    var bitmap = writer.Write("test text");
    bitmap.Save(HttpContext.Response.Body,System.Drawing.Imaging.ImageFormat.Png);
    return; // there's no need to return a `FileContentResult` by `File(...);`
}

演示:

这篇关于用ZXing.net生成条形码的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！