c# - 从 Entity Framework 调用时出现存储过程错误

Question

我正在尝试构建一个将运行我的存储过程的简单项目。

当我通过 SQL-Server 执行 SP 时，它工作正常:

EXECUTE RunSSISPackage1        
  @folder_name1 = N'SSIS projects',
  @project_name1=N'CalculateReports',
  @package_name1=N'CalculateReports.dtsx',
  @param1 = N'2017-04-01 00:00:00',
  @param1name = N'startDate'

我的 Controller :

public IActionResult Test()
{
    using (var cmd = _context.Database.GetDbConnection().CreateCommand())
    {
        cmd.CommandText = "RunSSISPackage";
        cmd.CommandType = CommandType.StoredProcedure;
        // set some parameters of the stored procedure
        cmd.Parameters.Add(new SqlParameter("@package_name1", SqlDbType.NVarChar)
        {
            Value = "N'CalculateReports.dtsx'"
        });
        cmd.Parameters.Add(new SqlParameter("@folder_name1", SqlDbType.NVarChar)
        {
            Value = "N'SSIS projects'"
        });
        cmd.Parameters.Add(new SqlParameter("@project_name1", SqlDbType.NVarChar)
        {
            Value = "N'CalculateReports.dtsx'"
        });
        cmd.Parameters.Add(new SqlParameter("@param1", SqlDbType.NVarChar)
        {
            Value = "N'2017-04-01 00:00:00'"
        });
        cmd.Parameters.Add(new SqlParameter("@param1name", SqlDbType.NVarChar)
        {
            Value = "N'startDate'"
        });
        if (cmd.Connection.State != ConnectionState.Open)
            cmd.Connection.Open();

        cmd.ExecuteNonQuery();

        return View();
    }
}

我收到一个错误:

Cannot access the package or the package does not exist. Verify that the package exists and that the user has permissions to it.

当 package_name\folder_name\project_name 的参数发送不正确时会出现此错误。

如何将前缀值作为参数传递？

Answer 1

您的代码中不需要 N'...' 换行，这只是 SQL Server 用于 unicode 转换的事情。例如，参见 this .因此，当您这样做时，您实际上传递的是 N'CalculateReports.dtsx' 的包名称，这显然不存在。

相反，执行此 Value = "CalculateReports.dtsx"，例如:

cmd.Parameters.Add(new SqlParameter("@package_name1", SqlDbType.NVarChar)
{
    Value = "CalculateReports.dtsx"
});
cmd.Parameters.Add(new SqlParameter("@folder_name1", SqlDbType.NVarChar)
{
    Value = "SSIS projects"
});
cmd.Parameters.Add(new SqlParameter("@project_name1", SqlDbType.NVarChar)
{
    Value = "CalculateReports.dtsx"
});
cmd.Parameters.Add(new SqlParameter("@param1", SqlDbType.NVarChar)
{
    Value = "2017-04-01 00:00:00"
});
cmd.Parameters.Add(new SqlParameter("@param1name", SqlDbType.NVarChar)
{
    Value = "startDate"
});