Textbox will not populate

Question

1.00/5 (3 votes)

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I have a web form that has a Label and two textboxes. One of the textboxes you can enter a name and press enter and the Label will populate with the data from the database but the textbox will not. I am trying to get the textbox to populate with the same data that the Label populates. How can I do that? What did I do wrong?

HTML

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title></title>
    <style type="text/css">
        #form1
        {
            text-align: right;
        }
        .style1
        {
            width: 98%;
        }
        .style3
        {
            width: 1096px;
            text-align: left;
        }
        .style5
        {
            width: 585px;
            height: 137px;
        }
        .style6
        {
            width: 100%;
        }
        .style7
        {
            width: 68px;
        }
        .style8
        {
            font-weight: bold;
        }
        </style>
</head>
<body background="Images/bkg-blu.jpg">
    <form id="form1" runat="server">
    <div style="font-size: x-large; font-weight: 700; text-align: center">
    
        <table class="style1">
            <tr>
                <td class="style3">
                    <table class="style1">
                        <tr>
                            <td style="text-align: justify">
                                                                                              
                                <img class="style5" src="Images/buildout_header.jpg" /></td>
                        </tr>
                    </table>
                </td>
            </tr>
        </table>
    
    </div>
    <p>
         </p>
    <table class="style6">
        <tr>
            <td class="style7" style="text-align: left">
                <asp:Label ID="Label1" runat="server" CssClass="style8" Text="INSTID"></asp:Label>
            </td>
            <td style="text-align: left">
                <asp:Label ID="Label2" runat="server" CssClass="style8" Text="INSTITUTION"></asp:Label>
            </td>
            <td style="text-align: left">
                 </td>
        </tr>
        <tr>
            <td class="style7" style="text-align: left">
                <asp:Label ID="lblINST_ID" runat="server" style="font-weight: 700"></asp:Label>
            </td>
            <td style="text-align: left">
                <asp:TextBox ID="TextBoxLongName" runat="server" 
                    ontextchanged="TextBoxLongName_TextChanged" Width="415px"></asp:TextBox>
            </td>
            <td style="text-align: left">
                <asp:TextBox ID="TextBoxINST_ID" runat="server"></asp:TextBox>
            </td>
        </tr>
    </table>
    <br />
    <p>
         </p>
    </form>
</body>
</html>

C#

using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Drawing;
using System.Text;
using System.Collections.Generic;
using System.Linq;
using System.Data.SqlClient;
using System.Configuration;
using System.Drawing.Printing;
using System.IO;
using CrystalDecisions.CrystalReports.Engine;
using CrystalDecisions.Shared;

namespace SACSCOCLogin1._1
{
    public partial class BranchOffsiteCamp : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            
        }

        protected void TextBoxLongName_TextChanged(object sender, EventArgs e)
        {
            SqlConnection con = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["HotConnectionString"].ConnectionString);
            con.Open();

            
            SqlCommand scmd = new SqlCommand("Select INST_ID, LongName from Table23 where LongName = '" + TextBoxLongName.Text + "'", con);
            
            SqlDataReader dr = scmd.ExecuteReader();
          
            if (dr.Read())
                
            {
                lblINST_ID.Text = dr["INST_ID"].ToString();
                TextBoxINST_ID.Text = dr["INST_ID"].ToString(); 
            }

            

            dr.Close();
            con.Close();
        }
    }
}

Posted 13-May-14 1:44am

Computer Wiz99

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Comments

CHill60 13-May-14 7:46am

You marked the solution to your previous post as the Answer. Are you now saying it didn't work?

Computer Wiz99 13-May-14 8:24am

On the previous question it did not populate the textbox so I changed the textbox to a Label and it worked. Now when I try to populate a textbox with the same data that the Label is populated with nothing comes up. Should I delete the web form and try a new one for this might have errors on it?

CHill60 13-May-14 10:41am

When I run you code as is then neither the label nor the textbox are updated as soon as the text changes in TextBoxLongName. However if I put AutoPostBack="True" as an attribute of TextBoxLongName then both work.

Computer Wiz99 13-May-14 10:44am

Yep!! I just thought about that and I did it also. Thanks for your help. Post solution please.

CHill60 13-May-14 11:41am

Done!

1 solution

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CHill60 · Accepted Answer · 2014-05-13T05:41:00

Solution 1

When I run you code as is then neither the label nor the textbox are updated as soon as the text changes in TextBoxLongName.

However if I put AutoPostBack="True" as an attribute of TextBoxLongName then both work.

Posted 13-May-14 5:41am

CHill60