DataSource Controls :: Insert DBNull Value Into Varchar 1 Null Field

Aug 12, 2010

My database includes a table with sever filds which are defined as (varchar(1),null), I tried using DBNull.Value, null, ' ' but cannot get a null inserted in that field of the database,

[Code]....

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I have a 20 to 30 fields on a form. Most of them are optional. However, the users can fill out what they want. If a user dosen't fill in a field when data is sent to the database it's sent as blank, instead of NULL. Is there a way I can generically say "for all textboxes if Equals("") then DBNull.Value". Without going through each and every textbox?

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Dim context As New SondageDataContext()
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this is my html code [Code]....

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[Code]....

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[code]....

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[Code]....

[Code]....

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[Code]....

C#:

[Code]....

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[code]...

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[Code]....

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[Code]....

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