Azure 为什么不是';TableQuery不遵守我的TakeLimit吗?
我想通过一个简单的TableQuery从Azure表中获取前n行。但在下面的代码中,所有行都会被获取,而不管我对Take的限制如何 我做错了什么Azure 为什么不是';TableQuery不遵守我的TakeLimit吗?,azure,azure-storage,azure-table-storage,Azure,Azure Storage,Azure Table Storage,我想通过一个简单的TableQuery从Azure表中获取前n行。但在下面的代码中,所有行都会被获取,而不管我对Take的限制如何 我做错了什么 int entryLimit = 5; var table = GetFromHelperFunc(); TableQuery<MyEntity> query = new TableQuery<MyEntity>() .Where(TableQuery.GenerateFilterCondition("Partiti
int entryLimit = 5;
var table = GetFromHelperFunc();
TableQuery<MyEntity> query = new TableQuery<MyEntity>()
.Where(TableQuery.GenerateFilterCondition("PartitionKey", QueryComparisons.Equal, "MyPK"))
.Take(entryLimit);
List<FeedEntry> entryList = new List<FeedEntry>();
TableQuerySegment<FeedEntry> currentSegment = null;
while (currentSegment == null || currentSegment.ContinuationToken != null)
{
currentSegment = table.ExecuteQuerySegmented(query, this.EntryResolver, currentSegment != null ? currentSegment.ContinuationToken : null);
entryList.AddRange(currentSegment.Results);
}
Trace.WriteLine(entryList.Count) // <-- Why does this exceed my limit?
int entryLimit=5;
var table=GetFromHelperFunc();
TableQuery=新建TableQuery()
.Where(TableQuery.GenerateFilterCondition(“PartitionKey”,QueryComparisons.Equal,“MyPK”))
.采取(入口限制);
List entryList=新列表();
TableQuerySegment currentSegment=null;
while(currentSegment==null | | currentSegment.ContinuationToken!=null)
{
currentSegment=table.ExecuteQuerySegmented(查询,this.EntryResolver,currentSegment!=null?currentSegment.ContinuationToken:null);
entryList.AddRange(currentSegment.Results);
}
Trace.WriteLine(entryList.Count)/存储SDK上的Take方法不像在LINQ中那样工作。想象你做了这样的事情:
TableQuery<TableEntity> query = new TableQuery<TableEntity>()
.Where(TableQuery.GenerateFilterCondition("PartitionKey", QueryComparisons.Equal, "temp"))
.Take(5);
var result = table.ExecuteQuery(query);
以下代码将在一个请求中提取5个项目,并在那里停止:
TableQuery<TableEntity> query = new TableQuery<TableEntity>()
.Where(TableQuery.GenerateFilterCondition("PartitionKey", QueryComparisons.Equal, "temp"))
.Take(5);
var result = table.ExecuteQuery(query);
int index = 0;
foreach (var item in result)
{
Console.WriteLine(item.RowKey);
index++;
if (index == 5)
break;
}
TableQuery query=newtablequery()
.Where(TableQuery.GenerateFilterCondition(“PartitionKey”,QueryComparisons.Equal,“temp”))
.采取(5);
var result=table.ExecuteQuery(查询);
int指数=0;
foreach(结果中的var项目)
{
Console.WriteLine(item.RowKey);
索引++;
如果(索引==5)
打破
}
实际上,Take()方法设置页面大小或“Take count”(TableQuery上的属性)。但是,如果您只需要5条记录,那么停止按时迭代仍然取决于您
在您的示例中,您应该修改while循环,使其在到达TakeCount(通过调用Take设置)时停止:
while(entryList.Count
AFAIK存储客户端库2.0在Take实现中有一个错误。它已在版本2.0.4中修复。
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原始MSDN帖子不再可用。仍然存在于WebArchive上:
非常感谢您的精彩解释!桑德里诺,你确定答案吗?在我的考试中,答题正确。可能您引用的StorageClient Nuget 9.1.0的旧版本存在问题,必须遵循此处的建议。接受的答案不正确-请参阅@Fabzio的答案。此链接现在已断开。添加了WebArchive链接
TableQuery<TableEntity> query = new TableQuery<TableEntity>()
.Where(TableQuery.GenerateFilterCondition("PartitionKey", QueryComparisons.Equal, "temp"))
.Take(5);
var result = table.ExecuteQuery(query);
int index = 0;
foreach (var item in result)
{
Console.WriteLine(item.RowKey);
index++;
if (index == 5)
break;
}
while (entryList.Count < query.TakeCount && (currentSegment == null || currentSegment.ContinuationToken != null))
{
currentSegment = table.ExecuteQuerySegmented(query, currentSegment != null ? currentSegment.ContinuationToken : null);
entryList.AddRange(currentSegment.Results);
}