plz solve this question

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how to bind Parent And Child Combobox from one Xml file .Selecion of one Combobox second Combobox will be selected.

here is the xml file

XML

<?xml version="1.0" encoding="utf-8"?>
<Countries>
   <Country Id="1" Name="India">
     <State>
        <SId>1</SId>
        <SName>Maharashtra</SName>
     </State>
    <State>
       <SId>2</SId>
       <SName>Gujarat</SName>
    </State>
      <State>
         <SId>3</SId>
         <SName>Delhi</SName>
      </State>
     <State>
         <SId>4</SId>
         <SName>Uttar Pradesh</SName>
     </State>
       <State>
         <SId>5</SId>
         <SName>Kerala</SName>
       </State>
     <State>
       <SId>6</SId>
       <SName>Jammu and Kashmir</SName>
     </State>
  </Country>
<Country Id="2" Name="Pakistan">
     <State>
       <SId>1</SId>
       <SName>Lahore</SName>
     </State>
  <State>
     <SId>2</SId>
     <SName>Rawalpindi</SName>
  </State>
  <State>
    <SId>3</SId>
    <SName>Karachi</SName>
  </State>
     <State>
       <SId>4</SId>
       <SName>Islamabad</SName>
     </State>
  <State>
    <SId>5</SId>
    <SName>Multan</SName>
  </State>
  </Country>
<Country Id="3" Name="Sri Lanka">
     <State>
       <SId>1</SId>
       <SName>Colombo</SName>
     </State>
  <State>
    <SId>2</SId>
    <SName>Kandy</SName>
  </State>
  <State>
    <SId>3</SId>
    <SName>Galle</SName>
  </State>
     <State>
       <SId>4</SId>
       <SName>Anuradhapura</SName>
     </State>
  <State>
    <SId>5</SId>
    <SName>Ratnapura</SName>
  </State>
   </Country>
</Countries>

Posted 24-Jan-12 20:27pm

phoolchand yadav

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Comments

Sergey Alexandrovich Kryukov 25-Jan-12 2:34am

I wonder how one combo box can be a parent of another? Perhaps wrong wording?
--SA

lukeer 25-Jan-12 2:58am

I guess that one combo shall hold countries. The second combo shall hold states in the country selected in first combo.

Therefore "Parent" is not meant the several-child-controls-in-a-parent-control-way but rather as a semantical connection.

Is that right, phoolchand yadav?

phoolchand yadav 25-Jan-12 4:04am

ok u can tell accoding to your way but i required selection of one combobox second combobox will be selected.if this xml file is wrong you can tell according to your way

Amir Mahfoozi 25-Jan-12 8:52am

Winform ? Web application ?

1 solution

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phoolchand yadav · Answer 1 · 2012-01-25T02:27:00

Here is the solution by phoolchand

C#

namespace WinformswithXml
{
    public partial class Form4 : Form
    {
        string xmlfile = "D:\\phoolchand\\Country.xml";
        DataSet ds = new DataSet();

        public Form4()
        {
            InitializeComponent();
        }

        private void Form4_Load(object sender, EventArgs e)
        {
            
            DataView dv,dv1;
            

            ds.ReadXml(xmlfile);
            dv = new DataView(ds.Tables[0]);
            cboCountry .DataSource = dv;
            cboCountry.DisplayMember = "Name";
            cboCountry.ValueMember = "Country_Id";

            dv1 = new DataView(ds.Tables[1]);
            dv1.RowFilter = "Country_Id=" + cboCountry.SelectedValue.ToString();
            cbostate.DataSource = dv1;
            cbostate.DisplayMember = "SName";
            cbostate .ValueMember = "SId";
           
        }

        private void cboCountry_SelectedIndexChanged(object sender, EventArgs e)
        {
        
            DataView dv1;
            //ds.ReadXml(xmlfile);
            dv1 = new DataView(ds.Tables[1]);
            string str = cboCountry.SelectedValue.ToString();
            if (str != "System.Data.DataRowView" & cboCountry.SelectedIndex != -1)
            {
                dv1.RowFilter = "Country_Id=" + cboCountry.SelectedValue.ToString();
            }
            cbostate.DataSource = dv1;
            cbostate.DisplayMember = "SName";
            cbostate.ValueMember = "SId";
        }
    }
}