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Quotes in a value passed in a SQL expression  VB .NET 2003 Application

Posted on 2006-10-25
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Last Modified: 2010-05-18
I have strings that have single quotes in the value.  When I use the value in my SQL expression, of course it does not like it.  Is there a way to get around this, other than changing the data in the table itself?
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Question by:mphillip85
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6 Comments
 
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Expert Comment

by:jake072
ID: 17807095
Yes, for all your string fields, do a simple replace:

str = str.Replace("'", "''")

Then, when outputting from the db, do the opposite:

str = str.Replace("''", "'")

Jake
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Author Comment

by:mphillip85
ID: 17824366
How do I pass a select command text with the single quote in the expression of the value like


"Select * FROM myTable WHERE myName = '" & "Cat's" & "';"

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Expert Comment

by:jake072
ID: 17835279
you use 2 single quotes for any single quote IN YOUR STRING.

So:

"Select * FROM myTable WHERE myName = '" & "Cat''s" & "'"

I don't know why you have the ; there?

Jake
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Author Comment

by:mphillip85
ID: 17839045
I put the ; in there because it wont error but will not pass the selec command either.  Plus the programming book says to put the ;

How will this work.

"Select * FROM myTable WHERE Cat's= " & "Cat"s" & "'"

So you say that Cat's is = Cat"s ? Literally?

That is what I am going to end up with.  Since I am not changing the data in the table iteslf.

I hope I am being clear.  I am leaning on actually using CONTAINS when I find a single quote for these somewhat rare records.

Mike



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jake072 earned 150 total points
ID: 17842233
Yes, to get it to pass in SQL, you need to replace single quotes with double quotes.  Obviously, when you retrieve the data, you will need to parse them out.

This is the way it is...  Is it not working for you or something?

I'm just confused what the problem is.

Jake
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Expert Comment

by:jake072
ID: 17849413
Just wondering, but why the 'B'?

I have been trying to clear any issues here.  Was there something more you needed?

Jake
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