>>I have a DateTime field in a table and sometimes I want to store a blank /null data there (The field is set up in Sql Server to accept nulls)
>>I have the following code
>>string lcNull = null;
>>if (DOC_DATERE.SelectedValue.ToString().Trim() == "")
>> {
>> DOC_DATERE.SelectedValue = lcNull;
>> }
>>... but this throws a run time error of:-
>> Object Reference not set to an instance of an object.
>>If I space out the field I get this error, if there is a valid date there its ok.
>>
>>Anybody know how to get a null date into the field ?
>>
>>Regards,
>>Gerard
>
>Check out Re: Int? definiton. What is it? Thread #1192933 Message #1192937
>
>It might just be for C# and it was introduced in 2.0 and I am not even sure if DateTime is supported by nullable types but it might be worth looking into.

Guys,

Yes, DateTime is supported by the nullable structure.

DateTime? dt = null;