使用C# SDK调用SearchAsync方法程序卡住一直不返回

[yaphet266]

Milvus.Client --version 2.2.2-preview.6
调用InsertAsync方法没有问题，调用Search和Query方法都会卡住不返回，我milvus服务端是用docker-compose启动的单节点版本

[weianweigan]

不是返回空而是程序卡住了？能贴一下卡住的代码吗？

[yaphet266]

@weianweigan 这个是我C#的代码，麻烦帮看一下是否有问题

`
public class MilvusRepository
{
private readonly MilvusClient _milvusClient;
public MilvusRepository()
{
_milvusClient = new MilvusClient("localhost", port: 19530);
}

    public async Task<List<TempleteFeature>> SearchTempleteFeatures(float[] vector, List<string> paperCodes)
    {
        try
        {
            var parm = new SearchParameters
            {
                OutputFields = { "Id", "Md5", "ImagePath", "PaperCode" },
                ConsistencyLevel = ConsistencyLevel.Strong,
                Offset = 0,
                ExtraParameters = { ["nprobe"] = "1024" }
            };
            if (paperCodes != null && paperCodes.Count > 0)
            {
                parm.Expression = $"PaperCode in [{string.Join(",", paperCodes)}]";
            }

            var collection = _milvusClient.GetCollection("TempleteFeatures");

            var results = await collection.SearchAsync(
                vectorFieldName: "Vector",
                vectors: new ReadOnlyMemory<float>[] { vector },
                SimilarityMetricType.Ip,
                limit: 5, parm
                );
            List<TempleteFeature> tfs = new List<TempleteFeature>();
            var ids = results.FieldsData.Where(w => w.FieldName == "Id").First() as FieldData<string>;

            var md5s = results.FieldsData.Where(w => w.FieldName == "Md5").First() as FieldData<string>;

            var imagePaths = results.FieldsData.Where(w => w.FieldName == "ImagePath").First() as FieldData<string>;

            var paperCodess = results.FieldsData.Where(w => w.FieldName == "PaperCode").First() as FieldData<string>;

            for (int i = 0; i < results.Scores.Count; i++)
            {
                TempleteFeature temp = new TempleteFeature()
                {
                    Distance = results.Scores[i],
                    Id = ids.Data[i],
                    Md5 = md5s.Data[i],
                    ImagePath = imagePaths.Data[i],
                    PaperCode = paperCodess.Data[i]
                };
                tfs.Add(temp);
            }

            return tfs;
        }
        catch (Exception ex)
        {

            throw ex;
        }
    }
}

`

调用 await collection.LoadAsync();方法也会挂起不返回任何，一直卡住，但是在attu中看是能正常load数据

[yaphet266]

这个是在attu中看的collection结构

[yaphet266]

我找到问题的原因了，因为我是在winform中调用Task异步方法，因为写法问题造成死锁了

[weianweigan]

我找到问题的原因了，因为我是在winform中调用Task异步方法，因为写法问题造成死锁了

可以试试 WPF+CommunityToolkit.Mvvm+IAsyncRelayCommand 来执行异步方法