CODEWITHSUNDEEP
sql-servervbscriptparametersado
burnt1ce
burnt1ce

Reputation: 14897

VBScript: Passing a parameter with a null value to a stored procedure?

In VBScript (ASP environment), is it possible to pass a parameter with a null value to a stored procedure?

Upvotes: 12

Views: 27908

Answers (4)

Keith
Keith

Reputation: 21254

Short answer: Set the parameter value to Null (VBScript keyword).

Upvotes: 2

Kuyenda
Kuyenda

Reputation: 4609

Try vbNullString or vbNullChar. You may also need adParamNullable.

set cnParam = cmd.CreateParameter("@value3",5,1,,vbNullString)  
cnParam.Attributes = adParamNullable  
cmd.Parameters.Append cnParam

Update:

Actually this worked for me:

set cnParam = cmd.CreateParameter("@value3",5,1,,Null)  
cnParam.Attributes = adParamNullable  
cmd.Parameters.Append cnParam

Huh, this worked too:

set cnParam = cmd.CreateParameter("@value3",5,1,,Null)  
cmd.Parameters.Append cnParam

Go figure.

Upvotes: 5

Tester101
Tester101

Reputation: 8172

Passing null to a stored procedure, using a command object.

Set cn = CreateObject("ADODB.Connection")
Set cmd = CreateObject("ADODB.Command")
cn.Open "Provider=SQLOLEDB.1;Integrated Security=SSPI;Data Source=.\Test"
Set cmd.ActiveConnection = cn
cmd.CommandText = "TestTable.sp_ModifyData"
cmd.CommandType = 4
cmd.NamedParameters = True

set cnParam = cmd.CreateParameter("@RowID",3,3,,-1)
cmd.Parameters.Append cnParam
set cnParam = cmd.CreateParameter("@AddRemoveModify",3,1,,0)
cmd.Parameters.Append cnParam
set cnParam = cmd.CreateParameter("@Value1",3,1,,0)
cmd.Parameters.Append cnParam
set cnParam = cmd.CreateParameter("@Value2",8,1,-1,"Test")
cmd.Parameters.Append cnParam
set cnParam = cmd.CreateParameter("@value3",5,1,,null)
cmd.Parameters.Append cnParam
set cnParam = cmd.CreateParameter("@value4",5,1,,0)
cmd.Parameters.Append cnParam
set cnParam = cmd.CreateParameter("@value5",8,1,-1,"")
cmd.Parameters.Append cnParam
cmd.Execute
cn.Close
Set cmd = Nothing
Set cn = Nothing

Sorry I didn't put much thought into naming the fields in my database.

Upvotes: 10

p.campbell
p.campbell

Reputation: 100607

If you're building strings, and checking/guarding against SQL Injection, you can simply use the word null in your SQL string, or comma delimited EXEC statement.

'calling a stored proc.
strSQL = "EXEC UpdateCustomer @CustomerID=" & iCustomerID + ",@PhoneNumber=null"

Here's how to use null in a manually built string to send to the DB

strSQL = "UPDATE Customer SET PhoneNumber = null WHERE CustomerID = " + iCustomerID

Upvotes: 2

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