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ASP CODE

Automatically Submit an Page using ASP.NET DropDownList Box
By: aspfree
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    2002-01-01

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    Automatically Submit an Page
    using ASP.NET DropDownList Box

    This example shows how to populate a dropdownlist box from a database andhave it automatically submit the page when selected. This specific example does aselect against a Pubs database and write out a message it was selected with a timestamp. This example requires MSDE or SQL Server with the pub's database to loaded.

    Here is the code

    <%@ Page EnableSessionState="False" EnableViewState="True" Debug="False" Trace="False" strict="True" %>
    <%@ Import Namespace="System.Data" %>
    <%@ Import Namespace="System.Data.SQLClient" %>
    <script language=VB runat=server>
    Sub Page_Load(Sender As Object, E As EventArgs)
    If Not IsPostBack Then
    Dim myConnection As SqlConnection = New SqlConnection("server=localhost;uid=sa;pwd=;database=pubs")
    Dim mySQL as string = "Select au_id, au_lname, au_fname from Authors"
    Dim myCmd as New SQLCommand(mySQL,myConnection)
    myConnection.Open()
    MyDropDownList.DataSource = myCmd.ExecuteReader()
    myDropDownList.DataBind()
    myConnection.Close()
    End If
    End Sub

    Sub Index_Changed(sender As Object, e As EventArgs)
    lblDisplayMessage.Text = "Form Was Submitted Automatically on Selection of DropDown: " & DateTime.Now.ToString()
    End Sub
    </script>
    <html>
    <head><title>View Specific Profession Info</title></head>
    <body>
    <asp:label id="lblDisplayMessage" runat="server" />
    <form name="frmValues" runat="server">
    <asp:dropdownlist
    DataValueField = "au_lname"
    DataTextField = "au_id"
    id="MyDropDownList"
    OnSelectedIndexChanged="Index_Changed"
    autopostback="true"
    runat="server" />
    </form>
    </body>
    </html>

    DISCLAIMER: The content provided in this article is not warranted or guaranteed by Developer Shed, Inc. The content provided is intended for entertainment and/or educational purposes in order to introduce to the reader key ideas, concepts, and/or product reviews. As such it is incumbent upon the reader to employ real-world tactics for security and implementation of best practices. We are not liable for any negative consequences that may result from implementing any information covered in our articles or tutorials. If this is a hardware review, it is not recommended to open and/or modify your hardware.

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