異步 function 不執行 sql CLR 存儲過程

Question

我有一個 CLR 存儲過程，我想從 C# 異步執行。

代碼如下：

private delegate void GeneratePayrollDelegate(string payProcessID);

public void GeneratePayroll(string payProcessID)
    {
        GeneratePayrollDelegate del = new GeneratePayrollDelegate(GeneratePayrollAsync);
        del.BeginInvoke(payProcessID, null, null);
    }

public void GeneratePayrollAsync(string payProcessID)
    {
        try
        {
            using (SqlConnection connection = new SqlConnection(DLConnectionStringHelper.GetConnectionString() + "; async=true;"))
            {
                using (SqlCommand cmd = new SqlCommand("proc_GeneratePayroll", connection))
                {                        
                    cmd.CommandTimeout = 3600;
                    cmd.CommandType = CommandType.StoredProcedure;

                    connection.Open();
                    cmd.ExecuteNonQuery();
                    connection.Close();
                }
            }
        }
        catch (Exception ex) { _Exceptions.ManageExceptions(ex); }
    }

如果從 sql 運行此存儲過程，則它會成功執行。

當它從上面的代碼執行時，當嘗試通過作為參數發送的 ID 檢索行時，它不會在 CLR 存儲過程中提供任何行。

需要幫忙！

Answer 1

您正在調用cmd.ExecuteNonQuery() ； 您應該調用BeginExecuteReader來獲取結果，因為示例代碼可以是這樣的

private void Asynchronous(IAsyncResult asyncResult)
{
                System.Data.SqlClient.SqlDataReader reader;
                try
                {
                    System.Data.SqlClient.SqlCommand command =
                       asyncResult.AsyncState as System.Data.SqlClient.SqlCommand;
                    reader = command.EndExecuteReader(asyncResult);
                    while (reader.Read())
                    {

                    }
                    reader.Close();
                }
                catch
                {
                }
}

public void GeneratePayrollAsync(string payProcessID)
{
    try
    {
        using (SqlConnection connection = new SqlConnection("ConnectionString"))
        {
            using (SqlCommand command = new SqlCommand("proc_GeneratePayroll", connection))
            {
                command.CommandTimeout = 3600;
                command.CommandType = CommandType.StoredProcedure;
                //Set Your stored procedure parameter here
                connection.Open();
                command.BeginExecuteReader(Asynchronous, command, CommandBehavior.Default);

            }
        }
    }
    catch (Exception ex) {  }
}