welcome to XRM blog

Keep in touch with latest CRM/ERP articles

To remain competitive your organisation must be efficient across the business process spectrum. To do so you need to take sound decisions based on a balance between the cost and risk. To do so you will be heavily dependent on your content management in itself needs...

image
Blog

Dynamic Dropdownlist in ASP.NET by a text file

By xrmlabs webmaster on 3/26/2013

Dynamic Dropdownlist in ASP.NET by a text file  

 Sometime we need the change the items in the dropdown list and we need it to change it rapidly if we define the items in the dropdown list then to change it the whole code is to be modified and reviewed it causes some times break down also . Here is a simple code to bind the drop down list to a text file so we can easily modified the text file according to our requirement  here I have taken the name of the product in a text file and bind it to a dropdown list .
Default.aspx

<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>
 
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 
<head runat="server">
    <title>Untitled Pagetitle>
head>
<body>
    <form id="form1" runat="server">
    <div>
        Select product from the list<br />
        <asp:DropDownList ID="DrpProduct" runat="server" Style="position: relative" Width="151px">
        asp:DropDownList>
        Quantity
        <asp:TextBox ID="txtquantity" runat="server" Style="position: relative">asp:TextBox><br />
         
 
        Price<br />
        <asp:TextBox ID="txtPrice" runat="server" Style="position: relative">asp:TextBox><br />
       <asp:ImageButton ID="Image1" runat="server" ImageUrl="images/go.jpg" OnClick="ImageButton1_Click"
            Style="position: relative" />
        
        Total cost<br />
        <asp:TextBox ID="txtTotalcost" runat="server" Style="position: relative">asp:TextBox>div>
    form>
body>
html>

Default.aspx.cs

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO;
public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (this.IsPostBack == false)     // means before submit - 1st time
        {
 
            string path = MapPath("~/prod.txt");           
            FileStream fp = new FileStream(path, FileMode.Open);
            StreamReader reader = new StreamReader(fp);
            string data;
            while ((data = reader.ReadLine()) != null)
            {
                string[] v = data.Split(',');
                 
                foreach (string entry in v )
                {
                    DrpProduct.Items.Add(entry);
                }
 
            }
            reader.Close();
            fp.Close();
        }
    }
    protected void Image1_Click(object sender, ImageClickEventArgs e)
    {
        long total = int.Parse(txtPrice.Text) * int.Parse(txtquantity.Text);
        txtTotalcost.Text = total.ToString();
    }
}

Screenshot 1


Screenshot 2




.Net
ASP.NET Dynamic Drop down list
Blog Calendar
Blog Calendar List
2019 Nov  7  1
2019 Jan  22  3
2018 Dec  27  4
2018 Nov  61  3
2018 Oct  12  3
2018 Sep  92  11
2018 Aug  4  2
2018 Jun  11  1
2018 Jan  49  2
2017 Sep  506  5
2017 Aug  16  1
2017 Jul  15  2
2017 Jun  43  2
2017 May  17  1
2017 Apr  31  2
2017 Mar  110  4
2017 Feb  375  4
2016 Dec  174  3
2016 Nov  323  8
2016 Oct  224  10
2016 Sep  354  6
2016 Aug  38  1
2016 Jun  1709  6
2016 May  103  3
2016 Jan  70  2
2015 Dec  385  6
2015 Nov  3  1
2015 Oct  12  1
2015 Sep  1274  6
2015 Aug  12  1
2015 Jul  117  2
2015 Jun  8  1
2015 May  20  1
2015 Apr  21  2
2015 Mar  71  3
2015 Jan  5130  4
2014 Dec  15  1
2014 Nov  2190  4
2014 Oct  75  2
2014 Sep  98  2
2014 Aug  3604  1
2014 Jul  42  2
2014 Apr  2439  12
2014 Mar  273  19
2014 Feb  226  8
2014 Jan  1510  16
2013 Dec  21  2
2013 Nov  625  2
2013 Oct  246  3
2013 Sep  10  1
2013 Aug  30  3
2013 Jul  203  1
2013 Apr  46  6
2013 Mar  1762  10
2013 Feb  292  4
2013 Jan  259  2
2012 Nov  29  2
2012 Oct  420  10
Tag Cloud
Interested in our services? Still not sure about project details? get a quote