Possible To Create An OPTIONAL Multi-value Field That Can Be Left Empty?

Mar 20, 2007

Greetings,

I have several reports for which the user has asked to have an optional muti-value parameter. They want to be able to select zero, one, many, or all values in the parameter list. The parm list is created through a query and the values are not static.

I would like to allow the user to leave the muti-value field empty if they want to allow all values to appear on the report. I've read some discussion about populating a multi-value default with the same query that produces the multi-value list values - presto, everything is selected. However, this is not a desirable solution for me because I "echo" the users parameter selections in the report heading. Selecting all values (and some parms have a lot of values) would cause the "parm feedback" section to grow large and unreadable.

In short, I don't want to tell the user they have to select everything when they really want to select nothing.

Is there any way to have a muti-value parm that won't insist the user select one or more values?

Thanks,

BCB

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Insert Query Fails (if Form Fields Left Empty)

Aug 13, 2007

Dear All,
I have created a table in my SQL server database, the problem i am facing is my insert query fails if i leave any form field empty (leave it blank). On my back-end table, only one field is mandatory, and others have been set with the constraint "allow null".
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<script language="VB" runat="server" >      Sub Page_Load(Src As Object, e As EventArgs)                      If Page.IsPostBack Then                        Dim ConLath As SqlConnection            Dim comLath As SqlCommand            Dim insertcmd                        conLath = New SqlConnection("Data Source=SQLas;Initial Catalog=settle;User ID=sa;Password=password")            ConLath.Open()            insertcmd = "Insert into His_set values (@t_d,@s_p,@p_s,@v_oq,@i_oq,@v_qn,@i_qn,@v_qw,@i_qw)"                        comLath = New SqlCommand(insertcmd, ConLath)                                    comLath.Parameters.Add(New SqlParameter("@t_d", SqlDbType.DateTime, 12))            comLath.Parameters("@t_d").Value = trade_date.Text            comLath.Parameters.Add(New SqlParameter("@s_p", SqlDbType.Decimal, 8))            comLath.Parameters("@s_p").Value = sett_price.Text            comLath.Parameters.Add(New SqlParameter("@p_s", SqlDbType.Decimal, 8))            comLath.Parameters("@p_s").Value = post_close.Text            comLath.Parameters.Add(New SqlParameter("@v_oq", SqlDbType.Int, 8))            comLath.Parameters("@v_oq").Value = vol_oq.Text            comLath.Parameters.Add(New SqlParameter("@i_oq", SqlDbType.Int, 8))            comLath.Parameters("@i_oq").Value = oi_oq.Text            comLath.Parameters.Add(New SqlParameter("@v_qn", SqlDbType.Int, 8))            comLath.Parameters("@v_qn").Value = vol_qn.Text            comLath.Parameters.Add(New SqlParameter("@v_qw", SqlDbType.Int, 8))            comLath.Parameters("@v_qw").Value = vol_qw.Text            comLath.Parameters.Add(New SqlParameter("@i_qn", SqlDbType.Int, 8))            comLath.Parameters("@i_qn").Value = oi_qn.Text            comLath.Parameters.Add(New SqlParameter("@i_qw", SqlDbType.Int, 8))            comLath.Parameters("@i_qw").Value = oi_qw.Text
                        Try                comLath.ExecuteNonQuery()                            Catch ex As SqlException                If ex.Number = 2627 Then                    Message.InnerHtml = "ERROR: A record already exists with " _                       & "the same primary key"                Else                    Message.InnerHtml = "ERROR: Could not add record, please " _                       & "ensure the fields are correctly filled out"                    Message.Style("color") = "red"                End If            End Try
            comLath.Dispose()            ConLath.Close()                                                        End If   End Sub
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Hello,

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Several people have asked about this, but I have not seen a response that works. I have several parameters that I want to use as filters. If a particular filter parameter is not entered, the report should not apply a filter on that criterion. It works fine to create a single value parameter which allows null, and use the following in SQL:

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Code Snippet
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