我正在尝试迭代一个维基数据JSON对象并且成功到了一定程度。我正在解析以下内容:http://www.wikidata.org/wiki/Special:EntityData/Q319.json
我正在使用以下代码进行迭代:
dynamic a = JsonConvert.DeserializeObject<dynamic>(wikidata_pageContents);
foreach (dynamic entity in a.entities) {
foreach (dynamic topLevelStructure in entity.Value) {
...
这一直有效,直到我得到如下的“声明”。
{
"mainsnak": {
"snaktype": "value",
"property": "P1036",
"datavalue": {
"value": "523.45",
"type": "string"
},
"datatype": "string"
},
"type": "statement",
"id": "Q319$5525e016-4210-bb2c-ce03-bd2dd52cca6c",
"rank": "normal"
}
我在claim.Value中使用以下JSON文本,但是field_name为null。
foreach (dynamic claimField in claim.Value)
{
string field_name = claimField.Name;
如何动态迭代上述对象中的值?我宁愿迭代而不是尝试建立一个对象结构并尽可能反序列化。
答案 0 :(得分:1)
上面代码中的所有内容都是正确的,我们只是不知道你是如何得到claim
的,所以我想问题就在那里。这非常简单而且有效:
dynamic a = JsonConvert.DeserializeObject<dynamic>(json);
foreach (dynamic entity in a.entities)
{
foreach (dynamic topLevelStructure in entity.Value)
{
if (topLevelStructure.Name == "claims")
{
foreach (dynamic claimField in topLevelStructure.Value)
{
var field_name = claimField.Name;
foreach (var p in claimField.Value)
{
var mainsnak = p.mainsnak;
var property = mainsnak.property.Value;
var datavalue = mainsnak.datavalue;
var value = datavalue.value.Value;
var type = datavalue.type.Value;
}
}
}
}
}
以下是使用Newtonsoft.Json.Linq
获取所有声明值的另一种非常简单的方法:
var claims = JObject.Parse(json)["entities"].First.First["claims"];
foreach (var claim in claims.Children())
{
var mainsnak = claim.First.First["mainsnak"];
var property = mainsnak["property"];
var datavalue = mainsnak["datavalue"];
var value = datavalue["value"];
var type = datavalue["type"];
}
答案 1 :(得分:0)
您的问题中显示的JSON对象中没有class MyTest extends CustomWebTestCase {
public function testSomething() {
//Create authoried and unauthorized clients.
$authenticatedClient = self::createAuthenticatedClient(array("ROLE_SUPER_ADMIN"));
$unauthorizedClient = self::createAuthenticatedClient(array("ROLE_INSUFFICIENT_PERMISSIONS"));
// Check if the page behaves properly when the user doesn't have necessary role(s).
$unauthorizedClient->request('GET', '/secured-page');
$response = $unauthorizedClient->getResponse();
$this->assertFalse($response->isSuccessful());
$this->assertEquals(403, $response->getStatusCode(), "This request should have failed!");
// Check if the page behaves properly when the user HAS the necessary role(s)
$authenticatedClient->request('GET', '/secured-page');
$response = $authenticatedClient->getResponse();
$this->assertTrue($response->isSuccessful());
$this->assertEquals(200, $response->getStatusCode(), "This request should be working!");
}
}
字段。所以你宁愿访问Name
属性,也可以从那里访问其他属性:
mainsnak