Conversion from type 'DBNull' to type 'String' is not valid

Question

i am receiving this problem

Conversion from type \'DBNull\' to type \'String\' is not valid.

Line 501: hfSupEmail.

Answer 1

You can use the Field method of the Datarow combined with an If Operator to check for a Null value in one line like this. If it is null, you can replace it with an empty string (or another string of your choosing):

hfSupEmail.Value = If(dt.Rows(0).Field(Of String)("SupEmail"), "")