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Handling DBNull and null in ASP.NET
What is the best way of rewriting these (erroneous) lines? bool? result = dr[\"result\"] == DBNull.Value ? null : Convert.ToInt32(dr[\"result\"]);[详细]
2023-04-03 19:37 分类：问答Add ability to set nil for a relationship core-data
I have two entity with a many-to-one relationship. For example Employee <<---> Shop. When I create a new employee, I can choose a shop for it. I fetch all the available shops and then I selec[详细]
2023-04-03 19:18 分类：问答How can I check if two strings match or if one is null in C#
I tried the following: (id == title) | (id.开发者_JS百科IsNullOrEmpty) ? \"class=\'enabled\'\" : \"\"[详细]
2023-04-03 15:42 分类：问答C# DateTime - How to check Time part is NULL?
Is there any easy way to check to see if the time part of the DateTime value is NULL other than checkin开发者_StackOverflow社区g hour is 0, min is 0 and sec is 0?[详细]
2023-04-03 14:27 分类：问答IBOutlets Not Setting in NSViewController
So I\'ve got an NSViewController (MyVC) set up like so: //MyVC.h ... @开发者_如何学Goproperty (nonatomic, retain) IBOutlet NSTextField *input;[详细]
2023-04-03 14:09 分类：问答Releasing objects: [obj release]; is not enough, need [obj release], obj = nil;?
Here I got some ugly code: NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateFormat:@\"yyyy\"];[详细]
2023-04-03 10:39 分类：问答Set local variable to null in PHP
Very often in code added by my more .NET oriented colleagues开发者_如何学Python, I\'ll run into something like this:[详细]
2023-04-03 10:18 分类：问答Printing null in java [duplicate]
This question already has answers here: Why does null reference pr开发者_JAVA技巧int as "null"[详细]
2023-04-03 08:04 分类：问答Loading an NSArray from a .plist file
OK, so I know this question seems really basic, but I can\'t find a solution to my problem anywhere -[详细]
2023-04-03 02:23 分类：问答Set date to NULL in MySQL database when leaving date field empty
hi have a HTML 5 date field for release date but not all items has a release date so I want to be ableto set it to null and hide releasedate entirely for those items. When I leave the date field empty[详细]
2023-04-03 01:39 分类：问答
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