NameValueCollection 转换为 Json

最新推荐文章于 2023-04-12 16:48:31 发布

joyhen

最新推荐文章于 2023-04-12 16:48:31 发布

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分类专栏： C# 文章标签： NameValueCollection json

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本文介绍了如何将NameValueCollection转换为Json字符串，包括创建扩展方法简化转换过程，并处理NameValueCollection中一个键可能对应多个值的情况。通过序列化字典，可以将NameValueCollection转换成Json，当键有多个值时，转换结果会以数组形式表示。

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参阅：http://stackoverflow.com/questions/7003740/how-to-convert-namevaluecollection-to-json-string

thenvc.AllKeys.ToDictionary(k => k, k => thenvc[k]);

If you need to do the conversion frequently, you can also create an extension method to NameValueCollection:

public static class NVCExtender
{
    public static IDictionary<string, string> ToDictionary(
                                        this NameValueCollection source)
    {
        return source.AllKeys.ToDictionary(k => k, k => source[k]);
    }
}

so you can do the conversion in one line like this:

NameValueCollection Data = new NameValueCollection();
Data.Add("Foo", "baa");

var dict = Data.ToDictionary();

Then you can serialize the dictionary:

var json = new JavaScriptSerializer().Serialize(dict);
// you get {"Foo":"baa"}

But NameValueCollection can have multiple values for one key, for example:

NameValueCollection Data = new NameValueCollection();
Data.Add("Foo", "baa");
Data.Add("Foo", "again?");

If you serialize this you will get {"Foo":"baa,again?"}.

You can modify the converter to produce IDictionary<string, string[]> instead:

public static IDictionary<string, string[]> ToDictionary(
                                    this NameValueCollection source)
{
    return source.AllKeys.ToDictionary(k => k, k => source.GetValues(k));
}

So you can get serialized value like this: {"Foo":["baa","again?"]}.