使用C驱动程序在两个数据之间获取数据。

i inserted data like this

我像这样插入数据

{ "userid" : "manaf", "DataValue" : { "$type" : "00", "$binary" : "sampleBinaryData" }, "timestamp" : 1460718961132, "_id" : { "$oid" : "5710cd7194e5f57831eea91e" }, "__v" : 0 }{ "u