Question

1 SQLDataReader to multiple Listboxes

Asked by: malramsay

Hi,

In my ASP.NET page, I need to retrieve data from a database with one SQL Command and then populate 3 Listboxes with this information.  The following from my Page_Load does not work and I've been able to get anything else to work.

----------------

            Dim MyConn As SqlConnection = New SqlConnection(ConfigurationSettings.AppSettings("SqlConn.ConnectionString"))
            Dim strSQL As String = "EXEC SP_FS_GETAIRLINEDATA"
            Dim MyComm As New SqlCommand(strSQL, MyConn)
            MyConn.Open()
            Dim myReader As SqlDataReader
            myReader = MyComm.ExecuteReader()
       
            lstAirV1.DataSource = myReader
            lstAirV1.DataBind()
            lstAirV2.DataSource = myReader
            lstAirV2.DataBind()
            lstAirV3.DataSource = myReader
            lstAirV3.DataBind()
            MyConn.Close()

--------------------------

I'd like to do this in the most code-efficient/performance-efficient way possible. I have also tried using datagrids and ArrayLists without success, although I may have been doing something wrong.

Also, there is another issue in that is a slight difference between the 3 listboxes.  The difference is the first entry - in the first lisbox the DataTextField is 'Any' and in the other two it is "---" with the DataValueField being "" in both.  This first entry does not come from the database but needs to be in the ASP.NET code.

Thanks!
Malcolm

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Asked On
2004-06-17 at 18:10:16ID21029810
Tags

between

,

datatextfield

,

datavaluefield

Topic

.NET

Participating Experts
4
Points
500
Comments
7

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Answers

 

by: Justin_WPosted on 2004-06-17 at 18:16:56ID: 11340433

 

by: malramsayPosted on 2004-06-17 at 18:21:19ID: 11340470

I have already done this and it makes no difference as to whether my code works.  Here's the aspx code.

<asp:TableRow>
      <asp:TableCell>Airline 1:</asp:TableCell>
            <asp:TableCell>
                  <asp:ListBox ID="lstAirV1" Runat="server" width="200px" DataValueField="CarrierCode" DataTextField="AirlineName" Rows="1"/>
      </asp:TableCell>
</asp:TableRow>
<asp:TableRow>
      <asp:TableCell>Airline 2:</asp:TableCell>
      <asp:TableCell>
            <asp:ListBox ID="lstAirV2" Runat="server" width="200px" DataValueField="CarrierCode" DataTextField="AirlineName" Rows="1"/>
      </asp:TableCell>
</asp:TableRow>
<asp:TableRow>
      <asp:TableCell>Airline 3:</asp:TableCell>
      <asp:TableCell>
            <asp:ListBox ID="lstAirV3" Runat="server" width="200px" DataValueField="CarrierCode" DataTextField="AirlineName" Rows="1"/>
      </asp:TableCell>
</asp:TableRow>

 

by: apeterPosted on 2004-06-17 at 22:39:09ID: 11341639

Hi,
   DataReader is read only FOrwar cursor..so once u use it , u can use that again. In your scenario use DATASET istead of DataReader.

-Aaron

 

by: gsiricPosted on 2004-06-18 at 00:51:19ID: 11342172

Hi. This work for me:

            Dim MyConn As SqlConnection = New SqlConnection(ConfigurationSettings.AppSettings("SqlConn.ConnectionString"))
            Dim strSQL As String = "EXEC SP_FS_GETAIRLINEDATA"
            Dim MyComm As New SqlCommand(strSQL, MyConn)
            MyConn.Open()
            Dim myReader As SqlDataReader
            myReader = MyComm.ExecuteReader()
       
            lstAirV1.DataSource = myReader
            lstAirV1.DataBind()
            MyConn.Close()

          foreach (ListItem i in lstAirV1.Items)
          {
      lstAirV2.Items.Add(i);
      lstAirV3.Items.Add(i);
          }

 

by: sajayPosted on 2004-06-18 at 03:34:42ID: 11342871

populate into a listitem collection ..

then use this for the dropdowns.. :)

20120131-EE-VQP-002

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