Mvc 使用zxing.net生成二维码



using System;

using System.Drawing.Imaging;

using System.IO;

using System.Web;

using System.Web.Mvc;

using System.Web.WebPages.Html;

using ZXing;

using ZXing.Common;

public static class HtmlHelperExtensions

{

public static IHtmlString GenerateRelayQrCode(this System.Web.Mvc.HtmlHelper helper, string qrValue, int height = 250, int width = 250, int margin = 0)

{

var barcodeWriter = new BarcodeWriter

{

Format = BarcodeFormat.QR_CODE,

Options = new EncodingOptions

{

Height = height,

Width = width,

Margin = margin

}

};

using (var bitmap = barcodeWriter.Write(qrValue))

using (var stream = new MemoryStream())

{

bitmap.Save(stream, ImageFormat.Gif);

var img = new TagBuilder("img");

img.MergeAttribute("alt", "your alt tag");

img.Attributes.Add("src", String.Format("data:image/gif;base64,{0}",

Convert.ToBase64String(stream.ToArray())));

return new HtmlString(img.ToString(TagRenderMode.SelfClosing));

}

}

}

在页面上可以这样调用    @Html.GenerateRelayQrCode(http://write.blog.csdn.net/postedit)