AWS services or capabilities described in AWS Documentation may vary by region/location. Click Getting Started with Amazon AWS to see specific differences applicable to the China (Beijing) Region.
GetItem provides an eventually consistent read by default. If your application
requires a strongly consistent read, set ConsistentRead to true
.
Although a strongly consistent read might take more time than an eventually consistent
read, it always returns the last updated value.
Namespace: Amazon.DynamoDBv2
Assembly: AWSSDK.dll
Version: (assembly version)
public abstract GetItemResponse GetItem( GetItemRequest request )
Container for the necessary parameters to execute the GetItem service method.
Exception | Condition |
---|---|
InternalServerErrorException | An error occurred on the server side. |
ProvisionedThroughputExceededException | 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. |
ResourceNotFoundException | The operation tried to access a nonexistent table or index. The resource might not be specified correctly, or its status might not be ACTIVE. |
This example shows how to get an item in a table.
// Create a client AmazonDynamoDBClient client = new AmazonDynamoDBClient(); // Define item key // Hash-key of the target item is string value "Mark Twain" // Range-key of the target item is string value "The Adventures of Tom Sawyer" Dictionary<string, AttributeValue> key = new Dictionary<string, AttributeValue> { { "Author", new AttributeValue { S = "Mark Twain" } }, { "Title", new AttributeValue { S = "The Adventures of Tom Sawyer" } } }; // Create GetItem request GetItemRequest request = new GetItemRequest { TableName = "SampleTable", Key = key, }; // Issue request var result = client.GetItem(request); // View response Console.WriteLine("Item:"); Dictionary<string, AttributeValue> item = result.Item; foreach (var keyValuePair in item) { Console.WriteLine("{0} : S={1}, N={2}, SS=[{3}], NS=[{4}]", keyValuePair.Key, keyValuePair.Value.S, keyValuePair.Value.N, string.Join(", ", keyValuePair.Value.SS ?? new List<string>()), string.Join(", ", keyValuePair.Value.NS ?? new List<string>())); }
.NET Framework:
Supported in: 4.5, 4.0, 3.5