Solved database populated drop down list

Posted on 2009-05-07
Last Modified: 2012-05-06
I have a page where i'm populating a dropdown list from a database.  Right now the code behind file only reads the form values and then changes a label to show those values.  The label is not getting changed and the page acts differently in firefox 3 and internet explorer 7.  In firefox, the page just doesn't do anything, in IE7 i get the following error message:

Invalid postback or callback argument.  Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page.  For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them.  If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.

I don't understand why this is not working, I simply want to read the 4 form values and insert them into a database but I like to check as I go and it's not even working right now.


			<div class="post">

			<div class="post-bgtop">

			<div class="post-bgbtm">

				<h1 class="title"><a href="#">Biker Registration  </a></h1>					

                <asp:Label ID="lblInsSuccess" runat="server" Text="here" CssClass="redtext"></asp:Label>

				<div class="entry">

				<form method="post" id="BikReg">


				<label class="reglabel">&nbsp;</label>&nbsp;

				*If you don&#39;t see your company listed here, you will need to register above.


                    <asp:SqlDataSource ID="srcBus" runat="server"


                    connectionString="<%$ connectionStrings:LOCcbc %>"

                    SelectCommand="Select BUSINESS_ID, BUSINESS_NAME FROM BUSINESS ORDER BY BUSINESS_NAME ASC"                    



				    <label for="indBusID" class="reglabel">Your Employer: &nbsp;</label>

                    <asp:DropDownList ID="indBusID" runat="server" AutoPostBack="true" 

                    DataSourceID="srcBus" DataTextField="BUSINESS_NAME" DataValueField="BUSINESS_ID" />



				    <label for="indTxtFName" class="reglabel">First Name: &nbsp;</label>

                    <asp:TextBox ID="indTxtFName" runat="server" CssClass="reginput"></asp:TextBox>



				    <label for="indTxtLName" class="reglabel">Last Name: &nbsp;</label>

                    <asp:TextBox ID="indTxtLName" runat="server" CssClass="reginput"></asp:TextBox>



				    <label for="indTxtEmail" class="reglabel">Email Address: &nbsp;</label>

                    <asp:TextBox ID="indTxtEmail" runat="server" CssClass="reginput"></asp:TextBox>


				<p><label for="indRegSubmit" class="reglabel"> &nbsp; </label>

                <asp:Button ID="indRegSubmit" runat="server" Text="Submit" onclick="indRegSubmit_Click" /></p>







codebehind file


using System;

using System.Data;

using System.Data.SqlClient;

using System.Collections.Generic;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.Configuration;

public partial class register : System.Web.UI.Page


    protected void Page_Load(object sender, EventArgs e)



    public static string FixQuotes(string strValue)


        return strValue.Replace("'", "''");


    protected void indRegSubmit_Click(object sender, EventArgs e)


        string sqlInsertInd;

        string sqlInsLog1;

        string sqlInsLog2;

        string sqlInsLog3;

        string sqlInsLog4;

        string sqlInsLog5;

        string sqlInsLog6;

        string sqlInsLog7;

        int frmBusID = Convert.ToInt32(indBusID.SelectedItem.Value);

        string frmFName = indTxtFName.Text;

        string frmLName = indTxtLName.Text;

        string frmEmail = indTxtEmail.Text;

        lblInsSuccess.Text = "businessid: " + frmBusID;

        lblInsSuccess.Text += "<br />frmFName: " + frmFName;

        lblInsSuccess.Text += "<br />frmLName: " + frmLName;

        lblInsSuccess.Text += "<br />frmEmail: " + frmEmail;



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Question by:rondre
LVL 18

Accepted Solution

David Robitaille earned 500 total points
ID: 24329134
it<s because you have html tags within the content of your form (the data).

First, you could try to remove the "<br />"

Author Closing Comment

ID: 31579092
Thanks davrob60 - me being an idiot and not mentioning other parts of the site, I'm using master pages and the form tag was already in the masterpage file w/ runat=server.  I removed the form tag from this and it works perfect.  Thanks for the info!

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