Amazon.DynamoDBv2.AmazonDynamoDBClient.Scan C# (CSharp) Метод

Документация по классу AmazonDynamoDBClient Usage Examples Of Amazon.DynamoDBv2.AmazonDynamoDBClient::Scan Показать файл Открыть проект

Scan() публичный Метод

The Scan operation returns one or more items and item attributes by accessing every item in a table or a secondary index. To have DynamoDB return fewer items, you can provide a ScanFilter operation.

If the total number of scanned items exceeds the maximum data set size limit of 1 MB, the scan stops and results are returned to the user as a LastEvaluatedKey value to continue the scan in a subsequent operation. The results also include the number of items exceeding the limit. A scan can result in no table data meeting the filter criteria.

By default, Scan operations proceed sequentially; however, for faster performance on a large table or secondary index, applications can request a parallel Scan operation by providing the Segment and TotalSegments parameters. For more information, see Parallel Scan in the Amazon DynamoDB Developer Guide.

By default, Scan uses eventually consistent reads when accessing the data in a table; therefore, the result set might not include the changes to data in the table immediately before the operation began. If you need a consistent copy of the data, as of the time that the Scan begins, you can set the ConsistentRead parameter to true.

/// An error occurred on the server side. /// /// Your request rate is too high. The AWS SDKs for DynamoDB automatically retry requests /// that receive this exception. Your request is eventually successful, unless your retry /// queue is too large to finish. Reduce the frequency of requests and use exponential /// backoff. For more information, go to Error /// Retries and Exponential Backoff in the Amazon DynamoDB Developer Guide. /// /// The operation tried to access a nonexistent table or index. The resource might not /// be specified correctly, or its status might not be ACTIVE. ///

public Scan ( ScanRequest request ) : ScanResponse
request	Amazon.DynamoDBv2.Model.ScanRequest	Container for the necessary parameters to execute the Scan service method.
Результат	Amazon.DynamoDBv2.Model.ScanResponse

        public ScanResponse Scan(ScanRequest request)
        {
            var marshaller = new ScanRequestMarshaller();
            var unmarshaller = ScanResponseUnmarshaller.Instance;

            return Invoke<ScanRequest,ScanResponse>(request, marshaller, unmarshaller);
        }

Same methods

AmazonDynamoDBClient::Scan ( string tableName, Condition>.Dictionary scanFilter ) : ScanResponse
AmazonDynamoDBClient::Scan ( string tableName, List attributesToGet ) : ScanResponse
AmazonDynamoDBClient::Scan ( string tableName, List attributesToGet, Condition>.Dictionary scanFilter ) : ScanResponse

Usage Example

Пример #1

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Файл: LinkColumn.cs Проект: tushargoyal1309/EventWeb

        public void InstantiateIn(System.Web.UI.Control container)
        {
            AmazonDynamoDBClient client = new AmazonDynamoDBClient();
            // string tableName = "Attendee";
            var request = new ScanRequest
            {
                TableName = "QuizQuestion",

            };
            var response = client.Scan(request);
            List<QuestionData> questionDataList = new List<QuestionData>();
            foreach (Dictionary<string, AttributeValue> item in response.ScanResult.Items)
            {
                // Process the result.

                QuestionData question = new QuestionData();
                if (item.ContainsKey("options"))
                {
                        foreach (var itemNew in item["options"].M)
                        {
                            Label link = new Label();
                            link.ID = "linkmodel";
                            container.Controls.Add(link);
                            link.Text = itemNew.Value.S;
                            //Label value = questionData.FindControl("options") as Label;
                            ////testM = itemNew.Key.ToString();
                            //value.Text = itemNew.Value.S;
                        }
                }

            }
        }

All Usage Examples Of Amazon.DynamoDBv2.AmazonDynamoDBClient::Scan

AmazonDynamoDBClient

BatchGetItem

BatchGetItemAsync

BatchWriteItem

BatchWriteItemAsync

BeginBatchGetItem

BeginBatchWriteItem

BeginCreateTable

BeginDeleteItem

BeginDeleteTable

BeginDescribeLimits