Detect A Null Field
I have a 'brief' field (varchar, 2000 characters) that I sometimes want to leave Null. Getting SQL Server to leave a field Null is no problem, but getting ASP to differentiate a Null field from a populated one is proving a real headache!!
How do you do this? I've tried:
If Len(objRS("f_brief")) = 0 Then... etc.
But it seems that Len(objRS("f_brief")) = 2 with a SQL Server database (though I've no idea why!!) Any ideas as to the best way to detect a genuinely Null (not just empty) field in a SQL Server database with ASP?
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How to detect field's type in asp with accessing sql server.
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I have a condition that will run depending if a field in the database is NULL. It will not run at all, and I tried various way to write it but none works so far
'not working
If assignee = DBNull Then
'not working
If assignee = null Then
'not working
If assignee = "" Then
If I write assignee to the page then the value of assignee will write if it has a value and nothing if it is null.
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I have a field called w. The data type of the field is number. I use Access database. I cannot update a null value in the field.
r3("w")="5"
r3.update
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I am trying to update an integer field in an Access database with a null value (ie, make the field empty). It currently has an integer in it. Here's the code I've tried, which normally works for all other updates:
set rs = Server.CreateObject("ADODB.Recordset")
rs.ActiveConnection = sConnString
rs.Source = "SELECT * FROM tblFixtures WHERE FixtureID = " & strFixtureIDcurrent
rs.CursorType = 0
rs.CursorLocation = 2
rs.LockType = 3
rs.Open()
rs_numRows = 0
rs("ArticleID") = ""
rs("Result") = ""
rs.update
rs.close
set rs = nothing
However I am getting a Type Mismatch error on the rs("ArticleID") = "" line. Where have I gone wrong?
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What's the best way to handle passing a null value to a number field in my Access database? Right now I am getting an INSERT INTO error when I am doing this. I tried doing the following:
Mon = Replace(Request.form("txtNewMon"),"","0") but it doesn't seem to work. Would you suggest doing an IF satement?
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I have an interesting situation that needs to be addressed ASAP.
I am running a standard SQL Query in ASP to retrieve some rows/columns from a table that's on a SQL Server 2000 database. I put the results of that query into a RecordSet, and then use the GetRows function to push the results that are in the recordset into an array variable. In the query that I am running, 39 columns and 2 rows are returned.
The GetRows function appears to be working - the array variable is being created with the proper dimensions. However, the values of the different "cells" of the array are not showing up correctly. The first and the last column values for each row are correct, yet everything else in between is blank, empty, NULL, or whatever.
In other words: ArrayVariable(0,0) shows up correctly, ArrayVariable(38,0) shows up correctly, but everything in between is null.
I did a test on the RecordSet and discovered that it was the culprit - it wasn't being filled in properly. This is strange, though, because the select query that I run in the ASP code to create the recordset returns perfect results when I run it on the SQL Server 2K database.
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I am using a stored procedure that outputs multiple recordsets.
I use <% SET rsDisplay = rsDisplay.NextRecordset() %to step to the
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In one particular condition the final recordset is not passed to the
page, so I need to detect that the object is empty.
I did just try <% If NOT rsDisplay.EOF Then %but I get:
Microsoft VBScript runtime error '800a01a8'
Object required
Any ideas how I can trap this error? I just want the area on the ASP
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Also, though the solution isn't exactly appropriate to
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....
end if
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I am using a Relational database for my site and i have the following tables:
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the fields in FIXTURES are:
GameDate
Home
Away
(All of the above are numerical fields)
the fields in GAMEDATES are:
DateID(integer)
GameDate(#Date Field#)
What i have done is in the GAMEDATE field in the FIXTURES table i have used the ID number of the date that i wish to assign to that record - using a LEFT JOIN to display the actual date that is pulled from the GAMEDATES table (That which corresponds to the relevant id used in Fixtures)
The problem is that in some of my code i want to display records using sql and sometimes in the where clause i use the following:
WHERE Fixtures.GameDate<=(Date())
obviously meaning WHERE GAMEDATE is LESS THAN or EQUAL to TODAY.
The thing is when i use the join it does not use the where clause and displays all of the records in the FIXTURES table.
Does any one know how to get around this, i have not received any error messages it just isnt displaying the right data
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