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VB.NET App with SQL SELECT WHERE and Single Quote in Field

Posted on 2014-03-19
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Last Modified: 2014-03-19
I have the following code in a VB.NET Web Form app that searches for names in a FileTable:
Dim connectionString As String = "Data Source=AV-W12-ROMS-1;Initial Catalog=RESUMES;Integrated Security=True"
Dim sql As String = ""
Dim connection As New SqlConnection(connectionString)
Dim cmd As New SqlCommand
sql = "SELECT IsNull(COUNT(1),0) as 'count' FROM RESUMES.dbo.ftbl_resume_files WHERE CONTAINS([name],'" + search_name + "')"
connection.Open()
cmd.Connection = connection
cmd.CommandText = sql
name_count = cmd.ExecuteScalar()
connection.Close()

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I ran into an error when one of the search_name field values was O'leary because of the single quote.  How can I avoid it but include it in the search?
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Question by:wchestnut
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5 Comments
 
LVL 35

Expert Comment

by:Dan Craciun
ID: 39940966
How about enclosing it between "" instead of '':
sql = "SELECT IsNull(COUNT(1),0) as 'count' FROM RESUMES.dbo.ftbl_resume_files WHERE CONTAINS([name],""" + search_name + """)"

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HTH,
Dan
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Author Comment

by:wchestnut
ID: 39940986
No, that didn't work... SQL didn't like the double-quotes.
New-SQL-String-Value.jpg
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LVL 35

Expert Comment

by:Dan Craciun
ID: 39940996
Yeah, it's confusing. Try this:

sql = "SELECT IsNull(COUNT(1),0) as 'count' FROM RESUMES.dbo.ftbl_resume_files WHERE CONTAINS([name],""" + search_name + """ + ")"

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Accepted Solution

by:
Carl Tawn earned 2000 total points
ID: 39941007
If you're using inline SQL then you need to escape the single apostrophe with a double apostrophe:
sql = "SELECT IsNull(COUNT(1),0) as 'count' FROM RESUMES.dbo.ftbl_resume_files WHERE CONTAINS([name],'" + search_name.Replace("'", "''") + "')"

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Although a parameterised query would be a neater, and safer, option.
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Author Closing Comment

by:wchestnut
ID: 39941012
Thanks, Carl!  That worked perfectly!
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