asked on NullReferenceException Problem
I am retrieving some data form a table using linq. I am pulling that info into text boxes I have on a form. But because some of the fields may be null and there is no way to know which ones will be null at any given time, thus I keep getting a NullReferenceException or an Object reference not set to an instance of an object error. I have tried everything to try to test the field to see if it is null but nothing has work.
ASP.NETLINQ Query.NET Programming
Last Comment
dpdmembers
ASKER
I am using VS2012.
Dim xNo = (From xReg In _Context.tbl_Peoples
Where xReg.str_Nat = Me.NatTextBox.Text
Select xReg)
If xNo.Count > 0 Then
For Each NatReg In xNo
NameTextBox.Text = NatReg.str_ForeName2
Next
End If
If NatReg.str_ForeName2 is null in the database table I get the errors.
Dim xNo = (From xReg In _Context.tbl_Peoples
Where xReg.str_Nat = Me.NatTextBox.Text
Select xReg)
If xNo.Count > 0 Then
For Each NatReg In xNo
NameTextBox.Text = NatReg.str_ForeName2
Next
End If
If NatReg.str_ForeName2 is null in the database table I get the errors.
can you try:
if string.isnullorwhitespace(NatReg.str_ForeName2) then
NameTextBox.Text = string.empty
else
NameTextBox.Text = NatReg.str_ForeName2
end if
ASKER
I tried that already. Does not even get past the IF.
I got the error Object reference not set to an instance of an object.
I got the error Object reference not set to an instance of an object.
ASKER
attached file For your review
capture.png
capture.png
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ASKER
Looks promising..will test it over the weekend and get back to you. Thanks.
are you using VS2015 and targeting one of the last Framework? If yes, you might want to try the Elvis operator: https://msdn.microsoft.com/en-us/library/dn986595.aspx