如何将EntityResolver与Azure Storage一起使用？
如何将EntityResolver与Azure Storage一起使用？
提问于 2014-10-02 04:04:19
我正在写下面的代码来从Azure表中检索所有实体。但我在传递实体解析器委托时有点自负。我在MSDN上找不到太多参考资料。
有人能指出，如何在下面的代码中使用EntityResover吗？
public class ATSHelper<T> where T : ITableEntity, new()
{
CloudStorageAccount storageAccount;
public ATSHelper(CloudStorageAccount storageAccount)
{
this.storageAccount = storageAccount;
}
public async Task<IEnumerable<T>> FetchAllEntities(string tableName)
{
List<T> allEntities = new List<T>();
CloudTable table = storageAccount.CreateCloudTableClient().GetTableReference(tableName);
TableContinuationToken contToken = new TableContinuationToken();
TableQuery query = new TableQuery();
CancellationToken cancelToken = new CancellationToken();
do
{
var qryResp = await table.ExecuteQuerySegmentedAsync<T>(query, ???? EntityResolver ???? ,contToken, cancelToken);
contToken = qryResp.ContinuationToken;
allEntities.AddRange(qryResp.Results);
}
while (contToken != null);
return allEntities;
}
}回答 1
Stack Overflow用户
发布于 2014-10-02 17:55:38
描述深度表存储的Here is a nice article。它还包括几个用于EntityResolver的示例。
理想的情况是有一个通用的解析器，它能产生想要的结果。然后，您可以将其包含在您的呼叫中。我将在这里引用所提供的文章中的一个示例：
EntityResolver<ShapeEntity> shapeResolver = (pk, rk, ts, props, etag) =>
{
ShapeEntity resolvedEntity = null;
string shapeType = props["ShapeType"].StringValue;
if (shapeType == "Rectangle") { resolvedEntity = new RectangleEntity(); }
else if (shapeType == "Ellipse") { resolvedEntity = new EllipseEntity(); }
else if (shapeType == "Line") { resolvedEntity = new LineEntity(); }
// Potentially throw here if an unknown shape is detected
resolvedEntity.PartitionKey = pk;
resolvedEntity.RowKey = rk;
resolvedEntity.Timestamp = ts;
resolvedEntity.ETag = etag;
resolvedEntity.ReadEntity(props, null);
return resolvedEntity;
};
currentSegment = await drawingTable.ExecuteQuerySegmentedAsync(drawingQuery, shapeResolver, currentSegment != null ? currentSegment.ContinuationToken : null);阅读完整的文章可以更好地理解解决方案。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/26149631
复制相关文章
相似问题
腾讯云开发者
