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02.18.2008 at 05:44PM PST, ID: 23173138
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8.0

VB .NET SQL Handling NULL values using insert into

Zones: SQL Query Syntax, VB Database Programming, Microsoft Visual Basic.Net
I wrote the code attached onload of form to handle NULL values.
While this works with a normall datagrid, it does not work for ComponentOne c1truedbgrid.
the default balues do get saved, however "" reverts to NULL :(

To get around this I'm thinking of handling the NULL by changing the INSERT INTO statement.

How can I set a different value eg: "" to the parameters below if they any of them are NULL otherwise keep the value of the parameter.?

INSERT INTO Customers
 (ClientNo, DateEntered, Company )
VALUES
 (@ClientNo,@DateEntered,@Company)


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Private Sub CustomerForm_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Me.C1TrueDBGrid1.Columns("DateEntered").DefaultValue = Now
        Me.C1TrueDBGrid1.Columns("Industry").DefaultValue = "Timber Pest Inspection"
        Me.C1TrueDBGrid1.Columns("TimberSure_Safe").DefaultValue = False
        Me.C1TrueDBGrid1.Columns("TimberSureLogo").DefaultValue = "<img src=""http://www.propertyinspections.com.au/portals/0/images/TimberSafeLogoBlank.gif"" border=""0"">"  ' TimeberSureLogo
        Me.C1TrueDBGrid1.Columns("logo_url").DefaultValue = "<img src=""http://www.propertyinspections.com.au/portals/0/nopic.gif"" border=""0"">"  ' URL Logo
        Me.C1TrueDBGrid1.Columns("Booknow").DefaultValue = "BOOK NOW"
        Me.C1TrueDBGrid1.Columns("ClickDate").DefaultValue = #1/1/2000#
        Me.C1TrueDBGrid1.Columns("Accepted").DefaultValue = True
        Me.C1TrueDBGrid1.Columns("DateAccepted").DefaultValue = Now
        Me.C1TrueDBGrid1.Columns("IndustryIcon").DefaultValue = "<img src=""http://www.propertyinspections.com.au/portals/0/icons/24x24/termite.jpg"" border=""0"">"  ' URL Logo 
        Me.C1TrueDBGrid1.Columns("BothIndustries").DefaultValue = False
 
        Me.C1TrueDBGrid1.Columns("Regions").DefaultValue = ""
        Me.C1TrueDBGrid1.Columns("RegionB").DefaultValue = ""
        Me.C1TrueDBGrid1.Columns("RegionC").DefaultValue = ""
        Me.C1TrueDBGrid1.Columns("RegionD").DefaultValue = ""
        Me.C1TrueDBGrid1.Columns("RegionE").DefaultValue = ""
 
    End Sub
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Question Stats
Zone: Programming
Question Asked By: siacom
Solution Provided By: xDJR1875
Participating Experts: 1
Solution Grade: A
Views: 143
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02.18.2008 at 05:52PM PST, ID: 20925116
xDJR1875:

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02.18.2008 at 06:47PM PST, ID: 20925312
siacom:

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02.18.2008 at 05:52PM PST, ID: 20925116
xDJR1875:
Try the following
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INSERT INTO Customers
 (ClientNo, DateEntered, Company )
VALUES
 (IsNull(@ClientNo,''),IsNull(@DateEntered,''),IsNull(@Company,''))
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Accepted Solution
 
02.18.2008 at 06:47PM PST, ID: 20925312
siacom:
Thank you for your help.
I only did a few to test it. SQL is attached.

I only tried it with Company and ContactName and I get the following ERROR:

OperationFailureExeption was unhandeled:
Parameterized Query '(@ClientNo int,@DateEntered datetime,@Company varchar(1024),@Con' expects parameter @Company, which was not supplied.



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INSERT INTO Customers
                         (ClientNo, DateEntered, Company, ContactName, FirstName, LastName, Street, Suburb, State, Postcode, ContactPhone, FreeCallTelephone, email, Industry, IndustryIcon, BothIndustries, Regions, RegionB, 
                         RegionC, RegionD, RegionE, TimberSure_Safe, TimberSureLogo, logo_url, Booknow, ClickDate, Accepted, DateAccepted)
VALUES        (@ClientNo,@DateEntered, ISNULL(@Company, ''), ISNULL(@ContactName, 
                         ''),@FirstName,@LastName,@Street,@Suburb,@State,@Postcode,@ContactPhone,@FreeCallTelephone,@email,@Industry,@IndustryIcon,@BothIndustries,@Regions,@RegionB,@RegionC,@RegionD,@RegionE,@TimberSure_Safe,@TimberSureLogo,@logo_url,@Booknow,@ClickDate,@Accepted,@DateAccepted)
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20080236-EE-VQP-29 / EE_QW_2_20070628