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HomeHomeArchived Discus...Archived Discus...Developing Under Previous Versions of .NETDeveloping Under Previous Versions of .NETASP.Net 2.0ASP.Net 2.0dataprovider and nullsdataprovider and nulls
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10/23/2006 11:17 AM
 
onishiro

Joined: 10/2/2006
Posts: 148
how can I insert a null value into the database using the controller and dataproviders?
 
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10/23/2006 5:58 PM
 
Craig Walker


medfluent.net
Joined: 7/12/2004
Posts: 240

In your SqlDataProvider just specify which fields can have NULL values.

For Example

Public Overrides Sub UpdateContacts(ByVal itemID As Integer, ByVal moduleID As Integer, ByVal name As String, ByVal email As String)
     SqlHelper.ExecuteNonQuery(ConnectionString, DatabaseOwner & ObjectQualifier & "Contacts_Update", itemID, moduleID, GetNull(name), GetNull(email))
End Sub

 
New Post
10/24/2006 4:48 AM
 
onishiro

Joined: 10/2/2006
Posts: 148
Cool, thanks, that was just what I was looking for, using nullable types works like a charm.

Thanks again.
 
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10/25/2006 12:44 PM
 
Sebastian Leupold


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Sebastian Leupold's Avatar

www.dnnwerk.de
Joined: 3/8/2004
Posts: 46212
please notice, that the nullable basic data types use special values, that are recognized as null and shall not be used aside, e.g. -1 for integer and "" (empty String) as Null-String.
Cheers from Germany,
Sebastian Leupold

dnnWerk - The DotNetNuke Experts   German Spoken DotNetNuke User Group

Speed up your DNN Websites with TurboDNN
 
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10/26/2006 7:49 PM
 
Mark Schuler

Joined: 10/1/2004
Posts: 92

I'm new to all this, but my limited understanding is that Nullable types are something new to ASP.Net 2.0, and you need to declare them in your VB/C# code so that the Database will accept a Null value when you insert/update - like this:

Dim varName As Nullable(Of Integer)

Is this what GetNull(...) is doing, or am I missing the point?

Thanks.

 
 
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