Question

我正在尝试使用基于日期/时间对象值的if else语句显示特定字符串。

我正在使用一个公式编辑器来检查语法，但我没有遇到任何问题，但是当在应用程序中解析公式时，我会得到满足条件的空白。

这是我的公式：

if (System.Convert.ToInt32(rpt.Fields["AppointmentResourceLink.Appointment.Patient.DateDied"].Value)>0)
{
 return System.Convert.ToString(rpt.Fields["AppointmentResourceLink.Appointment.Patient.FirstName"].Value) + " " + System.Convert.ToString(rpt.Fields["AppointmentResourceLink.Appointment.Patient.LastName"].Value) + '\n' + "Deceased: " + System.String.Format("{0:dd/MM/yyyy}",rpt.Fields["AppointmentResourceLink.Appointment.Patient.DateDied"].Value);
}
else
{
  return System.Convert.ToString(rpt.Fields["AppointmentResourceLink.Appointment.Patient.FirstName"].Value) + " " + System.Convert.ToString(rpt.Fields["AppointmentResourceLink.Appointment.Patient.LastName"].Value);
 }

公式编辑器允许转换为不同的数据类型，我尝试修改公式，返回值为布尔值，但这也不起作用。

由于

Answer 1

Convert.ToInt32方法不支持从DateTime到int的转换。

https://docs.microsoft.com/en-ca/dotnet/api/system.convert.toint32?view=netframework-4.7.1#System_Convert_ToInt32_System_DateTime_

Answer 2

这是有用的：

// ListFields（）;

试 { if（System.Convert.ToInt32（System.String.Format（＆＃34; {0：yyyy}＆＃34;，rpt.Fields [＆＃34; AppointmentResourceLink.Appointment.Patient.DateDied＆＃34;]。Value））→1）返回＆＃34;已故日期：＆＃34; + System.String.Format（＆＃34; {0：dd / MM / yyyy}＆＃34;，rpt.Fields [＆＃34; AppointmentResourceLink.Appointment.Patient.DateDied＆＃34;]。Value）; }

catch（System.Exception e）

{ System.String.Format（＆＃34; {0：DD / MM / YYYY}＆＃34;，rpt.Fields [＆＃34; AppointmentResourceLink.Appointment.Patient.DateDied＆＃34;]值）;
}

返回＆＃34;＆＃34;;

Answer 3

请尝试使用此代码，这将符合您的目的，并根据需要为您提供输出。

try
{
    string s = rpt.Fields["AppointmentResourceLink.Appointment.Patient.DateDied"].Value;

    // Please replace your datetime format in ParseExact
    DateTime dt = DateTime.ParseExact(s, "yyyy-MM-dd HH:mm", CultureInfo.InvariantCulture);
}
catch
{
    return System.Convert.ToString(rpt.Fields["AppointmentResourceLink.Appointment.Patient.FirstName"].Value) + " " + System.Convert.ToString(rpt.Fields["AppointmentResourceLink.Appointment.Patient.LastName"].Value);
}


if (dt != DateTime.MinValue)
{
    return System.Convert.ToString(rpt.Fields["AppointmentResourceLink.Appointment.Patient.FirstName"].Value) + " " + System.Convert.ToString(rpt.Fields["AppointmentResourceLink.Appointment.Patient.LastName"].Value) + '\n' + System.String.Format("font-style:Bold", "Deceased: ") + System.String.Format("{0:dd/MM/yyyy}",rpt.Fields["AppointmentResourceLink.Appointment.Patient.DateDied"].Value);
}
else
{
    return System.Convert.ToString(rpt.Fields["AppointmentResourceLink.Appointment.Patient.FirstName"].Value) + " " + System.Convert.ToString(rpt.Fields["AppointmentResourceLink.Appointment.Patient.LastName"].Value);
}

如果使用“System.Convert.ToInt32”的else语句不起作用

3 个答案: