JsonArray.Parse（...）错误 [英] JsonArray.Parse(...) error

问题描述

我开发一个新闻应用程序的Windows 8（在C＃，XAML）。不幸的是我下载一个JSON进纸（带 http://jsonlint.com/ 确认）异步后遇到一个奇怪的错误。下载成功，然后我想分析的结果： VAR项目= Windows.Data.JsonArray.Parse（结果）;

I am developing a news-app for Windows 8 (in C#, XAML). Unfortunately I encountered a strange error after downloading a JSON-Feed (validated with http://jsonlint.com/) asynchronously. The download succeeds and then I want to parse the result: var items = Windows.Data.JsonArray.Parse(result);.

当我运行code我得到以下错误：

When I run the code I get the following error:

在位置0无效字符。和无效的JSON字符串。

Json.JsonArray是微软一个新的图书馆。我也试过Newtonsoft的JSON-库同样的错误。我在做什么错了？

Json.JsonArray is a new Library from Microsoft. I also tried Newtonsoft's JSON-library with the same errors. What am I doing wrong?

这是全code：

// Retrieve recipe data from Azure
var client = new HttpClient();
client.MaxResponseContentBufferSize = 1024*1024; // Read up to 1 MB of data
var response = await client.GetAsync(new Uri("http://contosorecipes8.blob.core.windows.net/AzureRecipes"));
var result = await response.Content.ReadAsStringAsync();

// Parse the JSON recipe data
var recipes = JsonArray.Parse(result.Substring(1, result.Length - 1));

这code段是从微软动手实验室（Contoso的食谱）。我也试了一下没有源代码中的[和]（无效果）...

This code snippet is from a Microsoft Hands-On Lab (Contoso CookBook). I also tried it without the "[" and "]" in the source (with no effect)...

感谢您！

推荐答案

我可以一个小的修改后，运行code。在UTF8字符串的字节顺序标记似乎引发一个问题，从Windows.Data.Json JsonArray.Parse（）。

I was able to run your code after a small modification. The byte order mark of the UTF8 string seems to triggers a problem with JsonArray.Parse() from Windows.Data.Json.

要解决它，而无需使用附加编码的方式是ReadAsStringAsync（），例如。

A way to solve it without using additional encoding is to replace the BOM character after ReadAsStringAsync(), e.g.

result = result.Replace('\xfeff', ' ');

或更好

if (result.Length > 1 && result[0] == '\xfeff'){
    result = result.Remove(0, 1);
}

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