[英]Reading Nested Json using rapidjson
This is my Json array. 这是我的Json数组。
{
"colorsArray":[{
"colorName":"red",
"hexValue":"#f00"
},
{
"colorName":"green",
"hexValue":"#0f0"
},
{
"colorName":"blue",
"hexValue":"#00f"
}
]
}
I want to get value 'green'. 我希望得到“绿色”的价值。 My c++ code in rapidjson library is
我在rapidjson库中的c ++代码是
Document document;
document.Parse<0>(jsoncontent.c_str()).HasParseError();
document.Parse(jsoncontent.c_str());
const Value& user = document["colorsArray"];
string name = user["colorName"].GetString();
When I try to access the colorName, I am getting the below Runtime error. 当我尝试访问colorName时,我收到以下运行时错误。
rapidjson::GenericValue<Encoding, Allocator>::MemberIterator
rapidjson::GenericValue<Encoding, Allocator>::FindMember(const
rapidjson::GenericValue<Encoding, SourceAllocator>&) [with SourceAllocator
= rapidjson::MemoryPoolAllocator<>; Encoding = rapidjson::UTF8<>;
Allocator = rapidjson::MemoryPoolAllocator<>;
rapidjson::GenericValue<Encoding, Allocator>::MemberIterator =
rapidjson::GenericMemberIterator<false, rapidjson::UTF8<>,
rapidjson::MemoryPoolAllocator<> >]: Assertion `IsObject()' failed.
Aborted (core dumped)
How can I read a particular value using Rapidjson Library ? 如何使用Rapidjson Library读取特定值?
Briefly, in my opinion, the document is incomplete. 简而言之,在我看来,该文件是不完整的。 If you put the reading-value code in a loop body or a thread and run the program, the error would happen when you terminate.
如果将读取值代码放在循环体或线程中并运行程序,则终止时会发生错误。 So, judge the document is IsObject() first when you want to get a value.
因此,当您想要获取值时,首先判断文档是IsObject()。
Maybe this can be work: 也许这可以工作:
Document document;
document.Parse<0>(jsoncontent.c_str()).HasParseError();
document.Parse(jsoncontent.c_str());
if(document.IsObject()) // add this line
{
const Value& user = document["colorsArray"];
string name = user["colorName"].GetString();
}
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