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Xml deserialization of a Nullable DateTime object

Posted By:      Posted Date: September 23, 2010    Points: 0   Category :.NET Framework
 

Morning, we've had this a lot but the answers I've found do not appear to work.

 

C# 3.0, .Net 3.5, XML Serialization into a nullable DateTime property does not work with an empty string.  The exception is thrown before the internals of the property, when the XmlSerializer attempts to use DateTime.ParseExact (when I use a DataType="date" value) and just complains that it is not a valid DateTime format when I do not.

A few of the various combinations of signature that I have used are below but am I fundamentally wrong that empty strings should be classed as null values?  I bet at the end of this the conclusion will be: "if you have a value then pass a populated element in the xml, if you don't then don't pass that element at all" or "if you have no value you can still send the element so long as it has the xsi:nil attribute" .

A few combinations:

[XmlElement("foo")]

DateTime Foo {get; set;}

 

[XmlElement("foo")]

DateTime? Foo {get; set;}

 

[XmlElement("foo", DataTime="date")] // yes I just want the date part

DateTime? Foo {get; set;}

 

[XmlElement("foo", IsNullable=true)] // I believe Bet that this onl


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Xml deserialization of a Nullable DateTime object

  

Morning, we've had this a lot but the answers I've found do not appear to work.

 

C# 3.0, .Net 3.5, XML Serialization into a nullable DateTime property does not work with an empty string.  The exception is thrown before the internals of the property, when the XmlSerializer attempts to use DateTime.ParseExact (when I use a DataType="date" value) and just complains that it is not a valid DateTime format when I do not.

A few of the various combinations of signature that I have used are below but am I fundamentally wrong that empty strings should be classed as null values?  I bet at the end of this the conclusion will be: "if you have a value then pass a populated element in the xml, if you don't then don't pass that element at all" or "if you have no value you can still send the element so long as it has the xsi:nil attribute" .

A few combinations:

[XmlElement("foo")]

DateTime Foo {get; set;}

 

[XmlElement("foo")]

DateTime? Foo {get; set;}

 

[XmlElement("foo", DataTime="date")] // yes I just want the date part

DateTime? Foo {get; set;}

 

[XmlElement("foo", IsNullable=true)] // I believe Bet that this onl

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