Read XML in C#

using System;
using System.Data;
using System.Drawing;
using System.Windows.Forms;
using Microsoft.VisualBasic;

namespace xmlapp
{
    public partial class studdata : Form
    {
        public studdata()
        {
            InitializeComponent();
        }

        DataSet ds;
        string dir;
        int rno = 0;

        private void studdata_Load(object sender, EventArgs e)
        {
            ds = new DataSet();
            searchbtn.Enabled = firstbtn.Enabled = prevbtn.Enabled = nextbtn.Enabled = lastbtn.Enabled = clearbtn.Enabled = false;
        }

        private void loadbtn_Click(object sender, EventArgs e)
        {
            try
            {
                searchbtn.Enabled = firstbtn.Enabled = prevbtn.Enabled = nextbtn.Enabled = lastbtn.Enabled = clearbtn.Enabled = false;
                ds.Clear(); // for clearing grid view
                dataGridView1.DataSource = null;
                sno_txtbx.Text = sname_txtbx.Text = course_txtbx.Text = fee_txtbx.Text = "";
                pictureBox1.Image = null;
                openFileDialog1.Filter = "xml|*.xml|all files|*.*";
                DialogResult res = openFileDialog1.ShowDialog();
                if (res == DialogResult.OK)
                {
                    string fpath = openFileDialog1.FileName;
                    ds.ReadXml(fpath);
                    // setting primary key inorder to search a record using finding method
                    ds.Tables[0].Constraints.Add("pk_sno", ds.Tables[0].Columns[0], true);
                    dataGridView1.DataSource = ds.Tables[0];
                    dir = fpath.Substring(0, fpath.LastIndexOf("\\") + 1);
                    showdata();
                }
            }
            catch
            {
                MessageBox.Show("invalid input");
            }
        }

        void showdata()
        {
            if (ds.Tables[0].Rows.Count > 0)
            {
                searchbtn.Enabled = firstbtn.Enabled = prevbtn.Enabled = nextbtn.Enabled = lastbtn.Enabled = clearbtn.Enabled = true;
                pictureBox1.Image = null;
                sno_txtbx.Text = ds.Tables[0].Rows[rno][0].ToString();
                sname_txtbx.Text = ds.Tables[0].Rows[rno][1].ToString();
                course_txtbx.Text = ds.Tables[0].Rows[rno][2].ToString();
                fee_txtbx.Text = ds.Tables[0].Rows[rno][3].ToString();
                pictureBox1.ImageLocation = dir + ds.Tables[0].Rows[rno][4].ToString();
            }
            else
                MessageBox.Show("No records");
        }

        private void searchbtn_Click(object sender, EventArgs e)
        {
            int n = Convert.ToInt32(Interaction.InputBox("Enter sno to search:", "Search", "10", 200, 200));
            // searching using find method
            DataRow drow = ds.Tables[0].Rows.Find(n);
            if (drow != null)
            {
                rno = ds.Tables[0].Rows.IndexOf(drow);
                sno_txtbx.Text = drow[0].ToString();
                sname_txtbx.Text = drow[1].ToString();
                course_txtbx.Text = drow[2].ToString();
                fee_txtbx.Text = drow[3].ToString();
                pictureBox1.ImageLocation = dir + drow[4];
            }
            else
                MessageBox.Show("record not found");
        }

        private void clearbtn_Click(object sender, EventArgs e)
        {
            sno_txtbx.Text = sname_txtbx.Text = course_txtbx.Text = fee_txtbx.Text = "";
            pictureBox1.Image = null;
        }

        private void firstbtn_Click(object sender, EventArgs e)
        {
            rno = 0;
            showdata();
        }

        private void prevbtn_Click(object sender, EventArgs e)
        {
            if (rno > 0)
            {
                rno--;
                showdata();
            }
            else
            {
                MessageBox.Show("first record");
            }
        }

        private void nextbtn_Click(object sender, EventArgs e)
        {
            if (rno < ds.Tables[0].Rows.Count - 1)
            {
                rno++;
                showdata();
            }
            else
            {
                MessageBox.Show("LastRecord");
            }
        }

        private void lastbtn_Click(object sender, EventArgs e)
        {
            rno = ds.Tables[0].Rows.Count - 1;
            showdata();
        }

        private void exitbtn_Click(object sender, EventArgs e)
        {
            this.Close();
        }
    }
}

C#

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Note. Goto Project Menu.

// Add Reference -> select 'Microsoft.VisualBasic' from .NET tab; include namespace 'using Microsoft.VisualBasic' (To get input box)

C#

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Add OpenFileDialog control to the form, which appears below the form

Add PictureBox Control and change properties as follows.

BorderStyle=Fixed3D; SizeMode=StrechImage 

Example for Creating an XML file

Open Notepad and type the following & save it with extension .xml.

<students>
  <student>
    <sno>10</sno>
    <sname>Prashanth</sname>
    <course>dotnet</course>
    <fee>3500</fee>
    <photo>prash.jpg</photo>
  </student>
  <student>
    <sno>20</sno>
    <sname>Satyapal</sname>
    <course>java</course>
    <fee>3000</fee>
    <photo>satya.jpg</photo>
  </student>
  <student>
    <sno>30</sno>
    <sname>Mahender</sname>
    <course>php</course>
    <fee>2500</fee>
    <photo>mahi.jpg</photo>
  </student>
</students>

XML

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Note. XML file and respective jpeg images should be in the same folder.

To execute the program click loadxml button and select xml file.