部署到IIS

Question

我正在实施一个AJAX服务，该服务启动长时间运行的进程并通过Javascript的setInterval获取状态。完整代码在http://blog.robseder.com/2013/10/18/executing-a-long-running-process-from-a-web-page/

AjaxServices.asmx创建了我的worker类的新静态实例。 Worker类更新其进度。问题是一切都在本地工作。但是当它部署到服务器时它会挂起并且永远不会越过线路。我使用IIS 7。

using(SqlConnection conn = new SqlConnection(string))
using(SqlCommand command = conn.CreateCommand())
{
    //...
    if (conn.State != System.Data.ConnectionState.Open)
        conn.Open()
}

AjaxServices.asmx / GetStatus工作正常......它返回下面圈出的状态（HTTP 200）。问题是它根本没有命中我的Sql代码或try-catch块。

工人类代码摘录

using (SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString"].ToString()))
{
    UpdatePercent(6, 7, "Starting (inside USING)...", runId);

    #region first step
    using (SqlCommand command = conn.CreateCommand())
    {
        command.CommandType = System.Data.CommandType.StoredProcedure;
        command.CommandText = "[dbo].[sp name]";

        //parameters... etc...

        UpdatePercent(7, 8, "Parameters added, connection state: " + connectionState, runId);

        //code doesn't proceed past this line
        if (conn.State != System.Data.ConnectionState.Open)
            conn.Open();

        UpdatePercent(5, 10, "about to enter try-catch...", runId);

        try
        {
            UpdatePercent(5, 10, "Starting run insertion...", runId);
            command.ExecuteNonQuery();
            runId = int.Parse(command.Parameters["@RunID"].Value.ToString());
            UpdatePercent(10, 15, "Inserted run dimension...", runId);
        }
        catch(SqlException exc)
        {
            UpdatePercent(100, 100, exc.Message, runId);
        }
    }

Answer 1

将上述评论中的想法转化为答案：

必须将其放入try / catch以注意引发SqlException这是一个连接问题。

    //code doesn't proceed past this line
    if (conn.State != System.Data.ConnectionState.Open)
        conn.Open();