(C#) DNS Query A Records

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Shows how to perform a DNS query to retrieve A records.

Note: This example requires Chilkat v9.5.0.96 or later.

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Chilkat.Dns dns = new Chilkat.Dns();

Chilkat.JsonObject json = new Chilkat.JsonObject();
json.EmitCompact = false;

bool success = dns.Query("A","microsoft.com",json);
if (success == false) {
    Debug.WriteLine(dns.LastErrorText);
    return;
}

Debug.WriteLine(json.Emit());

// Sample response.
// Parsing code below..

// {
//   "answer": {
//     "a": [
//       {
//         "name": "microsoft.com",
//         "ttl": 1528,
//         "ipv4": "20.112.250.133"
//       },
//       {
//         "name": "microsoft.com",
//         "ttl": 1528,
//         "ipv4": "20.231.239.246"
//       },
//       {
//         "name": "microsoft.com",
//         "ttl": 1528,
//         "ipv4": "20.76.201.171"
//       },
//       {
//         "name": "microsoft.com",
//         "ttl": 1528,
//         "ipv4": "20.70.246.20"
//       },
//       {
//         "name": "microsoft.com",
//         "ttl": 1528,
//         "ipv4": "20.236.44.162"
//       }
//     ]
//   }
// }

// Use this online tool to generate parsing code from sample JSON: 
// Generate Parsing Code from JSON

string name;
int ttl;
string ipv4;

int i = 0;
int count_i = json.SizeOfArray("answer.a");
while (i < count_i) {
    json.I = i;
    name = json.StringOf("answer.a[i].name");
    ttl = json.IntOf("answer.a[i].ttl");
    ipv4 = json.StringOf("answer.a[i].ipv4");
    i = i + 1;
}