Kusto Query from c#

Question

我想从c#应用程序的Kusto DB中检索数据，任何人都可以帮助我。我有编写Kusto查询的知识，但我需要一些帮助，从Azure中托管的Azure Kusto数据库中提取数据。

我尝试了以下代码，但它不起作用：

var client = Kusto.Data.Net.Client.KustoClientFactory.CreateCslQueryProvider("https://help.kusto.windows.net/Samples;Fed=true");
var reader = client.ExecuteQuery("MyTable | count");
// Read the first row from reader -- it's 0'th column is the count of records in MyTable
// Don't forget to dispose of reader when done.

Answer 1

你能详细说明上面的代码有什么不起作用(你得到的错误消息是什么(吗？

此外，下面可以找到一个完整的(尽管很简单(示例：

// This sample illustrates how to query Kusto using the Kusto.Data .NET library.
//
// For the purpose of demonstration, the query being sent retrieves multiple result sets.
//
// The program should execute in an interactive context (so that on first run the user
// will get asked to sign in to Azure AD to access the Kusto service).
class Program
{
const string Cluster = "https://help.kusto.windows.net";
const string Database = "Samples";
static void Main()
{
// The query provider is the main interface to use when querying Kusto.
// It is recommended that the provider be created once for a specific target database,
// and then be reused many times (potentially across threads) until it is disposed-of.
var kcsb = new KustoConnectionStringBuilder(Cluster, Database)
.WithAadUserPromptAuthentication();
using (var queryProvider = KustoClientFactory.CreateCslQueryProvider(kcsb))
{
// The query -- Note that for demonstration purposes, we send a query that asks for two different
// result sets (HowManyRecords and SampleRecords).
var query = "StormEvents | count | as HowManyRecords; StormEvents | limit 10 | project StartTime, EventType, State | as SampleRecords";
// It is strongly recommended that each request has its own unique
// request identifier. This is mandatory for some scenarios (such as cancelling queries)
// and will make troubleshooting easier in others.
var clientRequestProperties = new ClientRequestProperties() { ClientRequestId = Guid.NewGuid().ToString() };
using (var reader = queryProvider.ExecuteQuery(query, clientRequestProperties))
{
// Read HowManyRecords
while (reader.Read())
{
var howManyRecords = reader.GetInt64(0);
Console.WriteLine($"There are {howManyRecords} records in the table");
}
// Move on to the next result set, SampleRecords
reader.NextResult();
Console.WriteLine();
while (reader.Read())
{
// Important note: For demonstration purposes we show how to read the data
// using the "bare bones" IDataReader interface. In a production environment
// one would normally use some ORM library to automatically map the data from
// IDataReader into a strongly-typed record type (e.g. Dapper.Net, AutoMapper, etc.)
DateTime time = reader.GetDateTime(0);
string type = reader.GetString(1);
string state = reader.GetString(2);
Console.WriteLine("{0}t{1,-20}t{2}", time, type, state);
}
}
}
}
}