小编Jon*_*Oro的帖子

是否可能或合理地将位图数据编码为JSON以在Web服务中返回？

更新:是的,这比我想象的要好.我为一组图像和图像数据组合创建了一个.NET复合对象

Public Class AllThumbnails Public imgAllThumbs As String Public positions()As Drawing.Rectangle End Class

并通过jQuery AJAX访问它:

$.ajax({
    type: "POST",
    url: "WebService.asmx/makeAllThumbnailsImage",
    data: "{DocumentNumber : \"" + DocumentNumber + "\"} ",
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    success: function (response) {
        var adl = (typeof response.d) == 'string' ? eval('(' + response.d + ')') : response.d;

        var data = Base64.decode(adl.imgAllThumbs);
        $('#output').append("<p><strong>" + data.length + "</strong></p>");
        $('#output').append("<p><strong><i>" + adl.positions.length + "<i></strong></p>");

    },
    failure: function (msg) {
        $('#output').text(msg);
    }
});

因为我的图像数据超出了标准的jsonSerialization缓冲区,所以我必须在web.config中增加一个值:

  <system.web.extensions>
    <scripting>
      <webServices> …