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

[Sep410]

Hi all,
Please help me in this code:

txtLastNameFM.T ext = IIf(dgFamilyMem ber.CurrentRow. Cells(3).Equals (System.DBNull. Value), "", dgFamilyMember. CurrentRow.Cell s(3).Value)

this is an error I get:
Conversion from type 'DBNull' to type 'String' is not valid.

I know the value of the dgFamilyMember. CurrentRow.Cell s(3).Value= null but the first part of the iif returns false! What is wrong here?

I need to check the value of dgFamilyMember. CurrentRow.Cell s(3).Value) to see if it is Null I need to fill txtlastname.tex t by "" otherwise I want to have the dgFamilyMember. CurrentRow.Cell s(3).Value in that textbox.
Please help me.

[Curtis Rutland]

You can't compare strings to DBNulls like that.

[Sep410]

I need to check the value of dgFamilyMember. CurrentRow.Cell s(3).Value) to see if it is Null I need to fill txtlastname.tex t by "" otherwise I want to have the dgFamilyMember. CurrentRow.Cell s(3).Value in that textbox.

Please help me.

[Sep410]

I found it.
I used IsDBNull(expres sion) before assigning to a string.