Preserving Single Quotes in Access

问题

I have created a form in Access 2010 that is used to insert data into an existing table. The table contains a Keywords field, Source combo box, and a Code text box where i write the data to be inserted and there is a button for executing the query. The code for the form is:

Private Sub cmd_go_Click()
Dim insertstring As String
insertstring = "INSERT INTO KWTable (KW, Source, Code) VALUES('" & text_key.Value & "','" & combo_source.Value & "','" & txt_code.Value & "');"
DoCmd.RunSQL insertstring
End Sub

The code is simple, it inputs the data to the table so i can reference it for future use. Now the problem I am having is that when I try to add long bits of code that I use in SQL Server i get a syntax missing expression error which I am assuming is coming from the single quotes since the code is from SQL. I am getting the error because when i am trying to store a code i used in SQL Server it uses single quotes which access does not recognise. I think if I try to write in the code for the insert form something to help convert the single quotes into double quotes, then reconvert them back to single quoteswill help solve the problem. I just cant figure out how to do it and could really use some help.

Thank You

回答1:

You can avoid trouble with included quotes in your inserted text by using a parameter query.

Consider an approach such as this for cmd_go_Click().

Dim strInsert As String
Dim db As DAO.database
Dim qdf As DAO.QueryDef

strInsert = "PARAMETERS pKW TEXT(255), pSource TEXT(255), pCode TEXT(255);" & vbCrLf & _
"INSERT INTO KWTable (KW, Source, Code) VALUES (pKW, pSource, pCode);"
'Debug.Print strInsert
Set db = CurrentDb
Set qdf = db.CreateQueryDef(vbNullString, strInsert)
qdf.Parameters("pKW") = Me.text_key.value
qdf.Parameters("pSource") = Me.combo_source.value
qdf.Parameters("pCode") = Me.txt_code.value
qdf.Execute dbFailOnError
Set qdf = Nothing
Set db = Nothing

However, I don't understand how JoinCells() fits in.

回答2:

I use a function that handles Null Values, and escapes single quotes (by converting them to two single quotes) when creating SQL statements directly:

Function SafeSQL(ByVal pvarSQL As Variant) As String
    SafeSQL2 = Replace(Nz(pvarSQL, ""), "'", "''")
End Function

Then in your routine you would have:

insertstring = "INSERT INTO KWTable (KW, Source, Code) VALUES('" & SafeSQL(text_key.Value) & "','" & SafeSQL(combo_source.Value) & "','" & SafeSQL(txt_code.Value) & "');"

来源：https://stackoverflow.com/questions/15772347/preserving-single-quotes-in-access

标签

ms-access