英文:
C# Unable to cast object of type system int64 to type system string
问题
gJFeature.id = int.Parse((string)featureProperties["OBJECTID"]);
**id= integer type**
> 无法将对象转换为整数。
有人可以帮我找到解决方案吗？
英文:
Dictionary<string, object> featureProperties = JsonConvert.DeserializeObject<Dictionary<string, object>>(properties);
gJFeature.id = int.Parse((string)featureProperties["OBJECTID"]);
id= integer type
> Unable to convert object to interger.
Can any one help me find out the solution.
答案1
得分: 1
我们可以得出结论，featureProperties["OBJECTID"] 不是一个 string，而是一个 long（又称 Int64）。
考虑改用：
gJFeature.id = Convert.ToInt32(featureProperties["OBJECTID"]);
它可以处理广泛的可能值。
英文:
We can conclude that featureProperties["OBJECTID"] is not a string, but a long (aka Int64).
Consider instead:
gJFeature.id = Convert.ToInt32(featureProperties["OBJECTID"]);
which handles a broad range of possible values.
答案2
得分: 0
请看以下翻译：
// 做类似这样的事情：
Dictionary<string, object> featureProperties = JsonConvert.DeserializeObject<Dictionary<string, object>>(properties);
gJFeature.id = Convert.ToString(featureProperties["OBJECTID"]);
英文:
Do something like this :
Dictionary<string, object> featureProperties = JsonConvert.DeserializeObject<Dictionary<string, object>>(properties);
gJFeature.id =Convert.ToString(featureProperties["OBJECTID"]);
答案3
得分: 0
看起来你的 object 是装箱的 Int64 (long)。
你不能将 long 直接转换为 string。你需要通过 ToString() 进行转换。
gJFeature.id = int.Parse(featureProperties["OBJECTID"].ToString());
或者如果你可以首先取消装箱你的 long，然后将其转换为 int：
gJFeature.id = (int)(long)featureProperties["OBJECTID"];
英文:
Looks like your object is boxed Int64 (long).
You cannot cast long to string. You need to convert it via ToString().
gJFeature.id = int.Parse(featureProperties["OBJECTID"].ToString());
Or if you can first unbox your long and then cast it to int:
gJFeature.id = (int)(long)featureProperties["OBJECTID"];
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