i want to set default value of dropdownlist is 1 when it is not selected

Question

5.00/5 (1 vote)

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My question is :
here by i have two dropdownlists both are fetching data from database
i have textboxes also
when i doesnot select value from first dropdownlist then i want value of textbox automatically set to 1.

This is Design page Coding

XML

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="abc.aspx.cs" Inherits="Abhimanu_ADMIN_abc" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>

                            Select Test Type&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                            <asp:DropDownList ID="ddlTestType" runat="server" AutoPostBack="True"
                                onselectedindexchanged="ddlTestType_SelectedIndexChanged" Width="100px">
                                <asp:ListItem></asp:ListItem>
                            </asp:DropDownList>
                        &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                            <asp:TextBox ID="txtTestType" runat="server"></asp:TextBox>
                        <br />
                            Select Test Section&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                            <asp:DropDownList ID="ddlTestSection" runat="server" AutoPostBack="True"
                                onselectedindexchanged="ddlTestSection_SelectedIndexChanged" Width="140px">
                            </asp:DropDownList>
                        &nbsp;&nbsp;
                            <asp:TextBox ID="txtTestSection" runat="server"></asp:TextBox>

    </div>
    </form>
</body>
</html>

this is codebehind

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Text;
using System.Net;
using System.IO;

public partial class Abhimanu_ADMIN_abc : System.Web.UI.Page
{
DataSet ds = new DataSet();
DataTable dt = new DataTable();

//SqlConnection Conn = new SqlConnection(ConfigurationManager.ConnectionStrings["test"].ToString());
SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["conTestMaster"].ToString());
DataTable dtbladd = new DataTable();
clsAddTest objtest = new clsAddTest();
SqlCommand cmdAd;
//string test;
bool IsPageRefreshed = false;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack == true)
{
dtbladd = objtest.dtTestType();
ddlTestType.Items.Clear();
for (int i = 0; i < dtbladd.Rows.Count; i++)
{
ddlTestType.Items.Add(dtbladd.Rows[i]["TestName"].ToString());
}
ddlTestType.DataSource = dtbladd;
dtbladd = objtest.dtTestSection(Convert.ToInt16(ddlTestType.SelectedIndex.ToString()) + 1);
ddlTestSection.Items.Clear();
for (int i = 0; i < dtbladd.Rows.Count; i++)
{
ddlTestSection.Items.Add(dtbladd.Rows[i]["TestSection"].ToString());

}
ddlTestSection.Items.Insert(0, "----------Select----------");
}

}
protected void ddlTestType_SelectedIndexChanged(object sender, EventArgs e)
{
dtbladd = objtest.dtTestSection(Convert.ToInt16(ddlTestType.SelectedIndex.ToString()) + 1);
ddlTestSection.Items.Clear();
for (int i = 0; i < dtbladd.Rows.Count; i++)
{
ddlTestSection.Items.Add(dtbladd.Rows[i]["TestSection"].ToString());

}

DataTable dt1 = new DataTable();
dt1 = objtest.dtGetTesttypeID(ddlTestType.SelectedItem.Text.ToString());

if (dt1.Rows.Count > 0)
{

ddlTestType.SelectedValue = dt1.Rows[0]["TestName"].ToString();

txtTestType.Text = dt1.Rows[0]["ID"].ToString();
}
}
protected void ddlTestSection_SelectedIndexChanged(object sender, EventArgs e)
{
dtbladd = new DataTable();
dtbladd = objtest.dtGetTestSectionId(ddlTestSection.SelectedItem.Text.ToString());
if (dtbladd.Rows.Count > 0)
{
ddlTestSection.SelectedValue = dtbladd.Rows[0]["TestSection"].ToString();

txtTestSection.Text = dtbladd.Rows[0]["ID"].ToString();

}

}
}

Posted 8-Oct-13 21:42pm

Mann Rai

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Comments

CodeBlack 9-Oct-13 4:44am

what is the structure of the 'dtbladd'

2 solutions

Solution 2

You can use above code with respected dropdownlist id also as if your ddl id is ddlFirst then

ddlFirst.Items.Insert(0, new ListItem("----------Select----------","1"));

after binding ddlFirst.

Posted 9-Oct-13 1:35am

Ajay_Saini

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Ajay_Saini · Accepted Answer · 2013-10-08T22:46:00

Solution 1

Just use below statement after binding your dropdownlist

ddlTestSection.Items.Insert(0, new ListItem("----------Select----------","1"));

Posted 8-Oct-13 22:46pm

Ajay_Saini

Comments

Mann Rai 9-Oct-13 6:32am

sir, this codeline is working for 2nd dropdownlist
its fine
but i want to display ---select--- at zero index of first dropdownlist

Sharma Richa 9-Oct-13 7:54am

add the same line for first dropdown