C#

DynamoDB - PutItem

See more Amazon DynamoDB Examples

Creates a new item, or replaces an old item with a new item. If an item that has the same primary key as the new item already exists in the specified table, the new item completely replaces the existing item. C#

bool success = false;

Chilkat.Rest rest = new Chilkat.Rest();

// Implements the following CURL command:

// curl -X POST https://dynamodb.us-west-2.amazonaws.com/ \
//   -H "Accept-Encoding: identity" \
//   -H "Content-Type: application/x-amz-json-1.0" \
//   -H "Authorization: AWS4-HMAC-SHA256 Credential=<Credential>, SignedHeaders=<Headers>, Signature=<Signature>" \
//   -H "X-Amz-Date: <Date>" \
//   -H "X-Amz-Target: DynamoDB_20120810.PutItem" \
//   -d '{
//     "TableName": "Thread",
//     "Item": {
//         "LastPostDateTime": {
//             "S": "201303190422"
//         },
//         "Tags": {
//             "SS": ["Update","Multiple Items","HelpMe"]
//         },
//         "ForumName": {
//             "S": "Amazon DynamoDB"
//         },
//         "Message": {
//             "S": "I want to update multiple items in a single call. What is the best way to do that?"
//         },
//         "Subject": {
//             "S": "How do I update multiple items?"
//         },
//         "LastPostedBy": {
//             "S": "fred@example.com"
//         }
//     },
//     "ConditionExpression": "ForumName <> :f and Subject <> :s",
//     "ExpressionAttributeValues": {
//         ":f": {"S": "Amazon DynamoDB"},
//         ":s": {"S": "How do I update multiple items?"}
//     }
// }'

// Use the following online tool to generate REST code from a CURL command
// Convert a cURL Command to REST Source Code

Chilkat.AuthAws authAws = new Chilkat.AuthAws();
authAws.AccessKey = "AWS_ACCESS_KEY";
authAws.SecretKey = "AWS_SECRET_KEY";
// Don't forget to change the region to your particular region. (Also make the same change in the call to Connect below.)
authAws.Region = "us-west-2";
authAws.ServiceName = "dynamodb";
// SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
rest.SetAuthAws(authAws);

// URL: https://dynamodb.us-west-2.amazonaws.com/
bool bTls = true;
int port = 443;
bool bAutoReconnect = true;
success = rest.Connect("dynamodb.us-west-2.amazonaws.com",port,bTls,bAutoReconnect);
if (success != true) {
    Debug.WriteLine("ConnectFailReason: " + Convert.ToString(rest.ConnectFailReason));
    Debug.WriteLine(rest.LastErrorText);
    return;
}

// Note: The above code does not need to be repeatedly called for each REST request.
// The rest object can be setup once, and then many requests can be sent.  Chilkat will automatically
// reconnect within a FullRequest* method as needed.  It is only the very first connection that is explicitly
// made via the Connect method.

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

// The following JSON is sent in the request body.

// {
//   "TableName": "Thread",
//   "Item": {
//     "LastPostDateTime": {
//       "S": "201303190422"
//     },
//     "Tags": {
//       "SS": [
//         "Update",
//         "Multiple Items",
//         "HelpMe"
//       ]
//     },
//     "ForumName": {
//       "S": "Amazon DynamoDB"
//     },
//     "Message": {
//       "S": "I want to update multiple items in a single call. What is the best way to do that?"
//     },
//     "Subject": {
//       "S": "How do I update multiple items?"
//     },
//     "LastPostedBy": {
//       "S": "fred@example.com"
//     }
//   },
//   "ConditionExpression": "ForumName <> :f and Subject <> :s",
//   "ExpressionAttributeValues": {
//     ":f": {
//       "S": "Amazon DynamoDB"
//     },
//     ":s": {
//       "S": "How do I update multiple items?"
//     }
//   }
// }

Chilkat.JsonObject json = new Chilkat.JsonObject();
json.UpdateString("TableName","Thread");
json.UpdateString("Item.LastPostDateTime.S","201303190422");
json.UpdateString("Item.Tags.SS[0]","Update");
json.UpdateString("Item.Tags.SS[1]","Multiple Items");
json.UpdateString("Item.Tags.SS[2]","HelpMe");
json.UpdateString("Item.ForumName.S","Amazon DynamoDB");
json.UpdateString("Item.Message.S","I want to update multiple items in a single call. What is the best way to do that?");
json.UpdateString("Item.Subject.S","How do I update multiple items?");
json.UpdateString("Item.LastPostedBy.S","fred@example.com");
json.UpdateString("ConditionExpression","ForumName <> :f and Subject <> :s");
json.UpdateString("ExpressionAttributeValues.:f.S","Amazon DynamoDB");
json.UpdateString("ExpressionAttributeValues.:s.S","How do I update multiple items?");

rest.AddHeader("Content-Type","application/x-amz-json-1.0");
rest.AddHeader("X-Amz-Target","DynamoDB_20120810.PutItem");
rest.AddHeader("Accept-Encoding","identity");

Chilkat.StringBuilder sbRequestBody = new Chilkat.StringBuilder();
json.EmitSb(sbRequestBody);
Chilkat.StringBuilder sbResponseBody = new Chilkat.StringBuilder();
success = rest.FullRequestSb("POST","/",sbRequestBody,sbResponseBody);
if (success != true) {
    Debug.WriteLine(rest.LastErrorText);
    return;
}

int respStatusCode = rest.ResponseStatusCode;
Debug.WriteLine("response status code = " + Convert.ToString(respStatusCode));
if (respStatusCode >= 400) {
    Debug.WriteLine("Response Status Code = " + Convert.ToString(respStatusCode));
    Debug.WriteLine("Response Header:");
    Debug.WriteLine(rest.ResponseHeader);
    Debug.WriteLine("Response Body:");
    Debug.WriteLine(sbResponseBody.GetAsString());
    return;
}

Chilkat.JsonObject jsonResponse = new Chilkat.JsonObject();
jsonResponse.LoadSb(sbResponseBody);

jsonResponse.EmitCompact = false;
Debug.WriteLine(jsonResponse.Emit());