建议添加批量写异步操作

[wuyang26]

基于网络的数据读写，异步操作是非常重要的，这里依照项目中的其他代码修改了一个类似的：
public Task<List> WriteNodeAsync(string[] tags, object[] values)
{
WriteValueCollection valuesToWrite = new WriteValueCollection();
for (int i = 0; i < tags.Length; i++)
{
if (i < values.Length)
{
WriteValue valueToWrite = new WriteValue()
{
NodeId = new NodeId(tags[i]),
AttributeId = Attributes.Value
};
valueToWrite.Value.Value = values[i];
valueToWrite.Value.StatusCode = StatusCodes.Good;
valueToWrite.Value.ServerTimestamp = DateTime.MinValue;
valueToWrite.Value.SourceTimestamp = DateTime.MinValue;
valuesToWrite.Add(valueToWrite);
}
}

        // Wrap the WriteAsync logic in a TaskCompletionSource, so we can use C# async/await syntax to call it:
        var taskCompletionSource = new TaskCompletionSource<List<bool>>();
        m_session.BeginWrite(
            requestHeader: null,
            nodesToWrite: valuesToWrite,
            callback: ar =>
            {
                var response = m_session.EndWrite(
                  result: ar,
                  results: out StatusCodeCollection results,
                  diagnosticInfos: out DiagnosticInfoCollection diag);

                try
                {
                    ClientBase.ValidateResponse(results, valuesToWrite);
                    ClientBase.ValidateDiagnosticInfos(diag, valuesToWrite);
                    List<bool> retList = new List<bool>();
                    foreach(var item in results)
                    {
                        retList.Add(StatusCode.IsGood(item));
                    }
                    
                    taskCompletionSource.SetResult(retList);
                }
                catch (Exception ex)
                {
                    taskCompletionSource.TrySetException(ex);
                }
            },
            asyncState: null);
        return taskCompletionSource.Task;
    }

[wuyang26]

上面粘贴可能有点问题：
`public Task<List> WriteNodeAsync(string[] tags, object[] values)
{
WriteValueCollection valuesToWrite = new WriteValueCollection();
for (int i = 0; i < tags.Length; i++)
{
if (i < values.Length)
{
WriteValue valueToWrite = new WriteValue()
{
NodeId = new NodeId(tags[i]),
AttributeId = Attributes.Value
};
valueToWrite.Value.Value = values[i];
valueToWrite.Value.StatusCode = StatusCodes.Good;
valueToWrite.Value.ServerTimestamp = DateTime.MinValue;
valueToWrite.Value.SourceTimestamp = DateTime.MinValue;
valuesToWrite.Add(valueToWrite);
}
}

        // Wrap the WriteAsync logic in a TaskCompletionSource, so we can use C# async/await syntax to call it:
        var taskCompletionSource = new TaskCompletionSource<List<bool>>();
        m_session.BeginWrite(
            requestHeader: null,
            nodesToWrite: valuesToWrite,
            callback: ar =>
            {
                var response = m_session.EndWrite(
                  result: ar,
                  results: out StatusCodeCollection results,
                  diagnosticInfos: out DiagnosticInfoCollection diag);

                try
                {
                    ClientBase.ValidateResponse(results, valuesToWrite);
                    ClientBase.ValidateDiagnosticInfos(diag, valuesToWrite);
                    List<bool> retList = new List<bool>();
                    foreach(var item in results)
                    {
                        retList.Add(StatusCode.IsGood(item));
                    }
                    
                    taskCompletionSource.SetResult(retList);
                }
                catch (Exception ex)
                {
                    taskCompletionSource.TrySetException(ex);
                }
            },
            asyncState: null);
        return taskCompletionSource.Task;
    }`

[wuyang26]

没办法：

Task<List>应该是Task<List<bool>>

[Richard.Hu]

嗯，是个好的方式。