Formatting Multiple Fields in One Report Label

Hello,
Thank you for the clarification. To accomplish this task. handle the XRLabel.BeforePrint event in the following manner:

C#
private void label1_BeforePrint(object sender, System.Drawing.Printing.PrintEventArgs e) {  
    XRLabel label = sender as XRLabel;  
    DateTime dateTimeValue = DateTime.Parse(label.Text);  
    if(dateTimeValue.TimeOfDay.Hours != 0 || dateTimeValue.TimeOfDay.Seconds != 0 || dateTimeValue.TimeOfDay.Minutes != 0)  
        label.Text = String.Format("{0:dd.MM.yyyy hh:mm}", dateTimeValue);  
    else  
        label.Text = String.Format("{0:dd.MM.yyyy}", dateTimeValue);  
}  

Visual Basic
Private Sub label1_BeforePrint(sender As Object, e As System.Drawing.Printing.PrintEventArgs)  
    Dim label As XRLabel = TryCast(sender, XRLabel)  
    Dim dateTimeValue As DateTime = DateTime.Parse(label.Text)  
    If dateTimeValue.TimeOfDay.Hours <> 0 OrElse dateTimeValue.TimeOfDay.Seconds <> 0 OrElse dateTimeValue.TimeOfDay.Minutes <> 0 Then  
        label.Text = [String].Format("{0:dd.MM.yyyy hh:mm}", dateTimeValue)  
    Else  
        label.Text = [String].Format("{0:dd.MM.yyyy}", dateTimeValue)  
    End If  
End Sub  

See the attached video showing the result.

Thank you for quick answer!

Unfortunately, the suggested approach does not fit me cause I need to implement this on designer side. So please tell me if it is possible to use some approach based on the syntax "[MyFieldName!Formatstring]" to achieve my goal.

Hello,
I'm afraid your task is unclear to me. The solution I posted in my previous comment works when the Preview tab of the End-User Designer is activated. Would you please describe your task in greater detail?