问题
I create a Datetime object with Datetime.Now and I have this as a property of a class.
When I bind this to a grid view:
<GridViewColumn Header="Date" Width="120" DisplayMemberBinding="{Binding transaction_date1, StringFormat=HH:mm}" />
The result is always 00:00.
When I debug the code I see that the hour, minute etc. properties of the Datetime object contain non-zero values. I think that the StringFormat in this case gets the hour and minute from the Date object within the Datetime object that has the correct dates but always has 12:00:00 AM as hour.
Is there any way to go past it and display the right hour and minute in my window?
Thank you in advance!
回答1:
Change it to this:
<GridViewColumn Header="Date" Width="120" DisplayMemberBinding="{Binding transaction_date1, StringFormat='{}{0:HH:mm}'}" />
If you want to use StringFormat with custom formatting, then you have to use this method where you provide the param index in the format string. It is equivalent to:
string.Format("{0:HH:mm}", transaction_date1);
The two curly braces at the start {} are an instruction to the XAML parser to ignore further curly braces found in the string. So you could use your date value multiple times in one binding statement:
DisplayMemberBinding="{Binding transaction_date1, StringFormat=`{} Your date-time is {0:dd/mm/yy} at approx. {0:HH} hours and {0:mm} minutes`}"
来源：https://stackoverflow.com/questions/33445385/stringformat-of-datetime-object-in-binding-gives-back-0-for-hour-and-minute