Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

pass value of listbox items to select parameter

Posted on 2014-09-15
2
Medium Priority
?
1,017 Views
Last Modified: 2014-10-14
I have a form with a multi list box:

<asp:ListBox ID="lstAction" runat="server" Rows="3" SelectionMode="Multiple"></asp:ListBox>

Open in new window


I have a stored procedure that's getting data from an objectdatasource, when one value is passed it works ok

 
      <asp:ObjectDataSource ID="odsSalesSC" runat="server" OldValuesParameterFormatString="original_{0}" SelectMethod="GetData" TypeName="RapidFire.RFTableAdapters.USP_TOTAL_ORDERCALLSTableAdapter" OnSelecting="odsSalesSC_Selecting">
            <SelectParameters>
                <asp:ControlParameter ControlID="lstAction" Name="action" PropertyName="SelectedValue" Type="String" ConvertEmptyStringToNull="true" />                
            </SelectParameters>
        </asp:ObjectDataSource>

Open in new window


But when a user select mulitple options I have build a string from the  selection that pass into a storedprocedure like where something in ('a','b','c').
How can I get the values from strAction to pass into my select parameter?

protected void btnFilter_Click(object sender, EventArgs e)
        {            
            String strAction = String.Empty;           
            foreach (ListItem liAction in lstAction.Items)
            {
                if (liAction.Selected)
                {
                    strAction += "'" + liAction.Value + "',";
                }
            }
            strAction = strAction.Substring(0, strAction.Length - 1);
}

Open in new window

0
Comment
Question by:Scarlett72
2 Comments
 
LVL 49

Accepted Solution

by:
PortletPaul earned 2000 total points
ID: 40324702
123,456,789,101112,13141516,1718192021,222324252627

that APPEARS to be array of values, so why doesn't SQL just understand that? Well, is it really an array to start with?

NO! As you generate the sql statement to send, it becomes text, or a "string" so to SQL it looks like this:

'123,456,789,101112,13141516,1718192021,222324252627'

It is just a single string - that just happens to have many digits and commas in it, to SQL it's the same type of data as this:

'Lorem Ipsum is simply dummy text of the printing and typesetting industry  since the 1500s'

On top of which SQL doesn't work with arrays anyway.

I'm not a .NET or C# person, but try these articles to see if they help:
Delimited list as parameter: what are the options? by angeliii (SQL)
Passing lists and complex data through a parameter by aikimark (VB)

{+edit}
here are 2 previously answered questions on the topic with .NET
http://www.experts-exchange.com/Programming/Languages/.NET/ASP.NET/Q_28329379.html#accepted-solution
http://www.experts-exchange.com/Programming/Languages/.NET/ASP.NET/Q_28329183.html#accepted-solution

both refer to a function: dbo.ParmsTolist()
see:
http://www.experts-exchange.com/Database/MS-SQL-Server/Q_21627393.html#discussion
0
 
LVL 29

Expert Comment

by:sammySeltzer
ID: 40325218
I am sure you understand your code is no where near complete.

Since you will be calling a stored proc, as I understand your question, then you would need something like this:

SqlCommand cmd = new SqlCommand("storedprocName", Conn);
cmd.CommandType = CommandType.StoredProcedure;

//Then pass select as parameter:

cmd.Parameters.AddWithValue("@lstAction", strAction);

Open in new window

0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Calculating holidays and working days is a function that is often needed yet it is not one found within the Framework. This article presents one approach to building a working-day calculator for use in .NET.
This article aims to explain the working of CircularLogArchiver. This tool was designed to solve the buildup of log file in cases where systems do not support circular logging or where circular logging is not enabled
We’ve all felt that sense of false security before—locking down external access to a database or component and feeling like we’ve done all we need to do to secure company data. But that feeling is fleeting. Attacks these days can happen in many w…
Screencast - Getting to Know the Pipeline

782 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question