In this article I’m going to explain how to insert delete update records
in XML file 
using ASP.NET and C#. 

What is XML?

 XML was created to structure, store and transport data.

  • XML stands for EXtensible Markup Language
  • XML is a markup language much like HTML
  • XML was designed to carry data, not to display data
  • XML tags are not predefined. You must define your own tags
  • XML is designed to be self-descriptive
  • XML is a W3C Recommendation

In this article I’ll show you how to insert delete update records in lightweight XML file.

So first we should create XML file

 

This is sample xml data structure we have created for the demo

<?xml version="1.0" standalone="yes"?>

<EmployeeDetails>

  <Employee>

    <empid>1001</empid>

    <name>Sachin</name>

    <designation>Software Engineer</designation>

    <city>Chennai</city>

    <country>India</country>

  </Employee>

  <Employee>

    <empid>1002</empid>

    <name>Suresh</name>

    <designation>Web Developer</designation>

    <city>New Delhi</city>

    <country>India</country>

  </Employee>

  </EmployeeDetails>

 

Designer Source Code:

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

    <title></title>

</head>

<body>

    <form id="form1" runat="server">

    <div>

<asp:GridView ID="gvEmployee" runat="server" AutoGenerateColumns="false" ShowFooter="true"

    style="margin-left: 113px" Width="1049px"

    OnRowCommand="gvEmployee_OnRowCommand"

    onrowcancelingedit="gvEmployee_RowCancelingEdit"

    onrowdeleting="gvEmployee_RowDeleting" onrowediting="gvEmployee_RowEditing"

    onrowupdating="gvEmployee_RowUpdating"

    onpageindexchanging="gvEmployee_PageIndexChanging">

<Columns>

       

    <asp:TemplateField HeaderText="Employee ID" HeaderStyle-Width="100px">

        

    <ItemTemplate >

        <asp:Label ID="lblEmpID" runat="server" Text='<%#DataBinder.Eval(

                             Container. DataItem,"empid") %>'></asp:Label>

    </ItemTemplate>

    <FooterTemplate>

        <asp:TextBox ID="txtAddEmpID" runat="server"></asp:TextBox>       

    </FooterTemplate>

    </asp:TemplateField>

 

    <asp:TemplateField HeaderText="Name" HeaderStyle-Width="100px">

    <EditItemTemplate>

        <asp:TextBox ID="txtName" runat="server" Text='<%#DataBinder.Eval(

                           Container. DataItem,"name") %>'></asp:TextBox>       

    </EditItemTemplate>

    <ItemTemplate >

        <asp:Label ID="lblName" runat="server" Text='<%#DataBinder.Eval(

                            Container. DataItem,"name") %>'></asp:Label>

    </ItemTemplate>

    <FooterTemplate>

        <asp:TextBox ID="txtAddName" runat="server"></asp:TextBox>       

    </FooterTemplate>

    </asp:TemplateField>

 

    <asp:TemplateField HeaderText="Designation" HeaderStyle-Width="100px">

    <EditItemTemplate>

        <asp:TextBox ID="txtDesignation" runat="server" Text='<%#DataBinder.Eval(

                            Container. DataItem,"designation") %>'></asp:TextBox>       

    </EditItemTemplate>

    <ItemTemplate >

        <asp:Label ID="lblDesignation" runat="server" Text='<%#DataBinder.Eval(

                              Container. DataItem,"designation") %>'></asp:Label>

    </ItemTemplate>

    <FooterTemplate>

        <asp:TextBox ID="txtAddDesignation" runat="server"></asp:TextBox>       

    </FooterTemplate>

    </asp:TemplateField>

 

    <asp:TemplateField HeaderText="City" HeaderStyle-Width="100px">

    <EditItemTemplate>

        <asp:TextBox ID="txtCity" runat="server" Text='<%#DataBinder.Eval(

                            Container. DataItem,"city") %>'></asp:TextBox>       

    </EditItemTemplate>

    <ItemTemplate >

        <asp:Label ID="lblCity" runat="server" Text='<%#DataBinder.Eval(

                              Container. DataItem,"city") %>'></asp:Label>

    </ItemTemplate>

    <FooterTemplate>

        <asp:TextBox ID="txtAddCity" runat="server"></asp:TextBox>       

    </FooterTemplate>

    </asp:TemplateField>

 

    <asp:TemplateField HeaderText="Country" HeaderStyle-Width="200px">

    <EditItemTemplate >

        <asp:TextBox ID="txtCountry" runat="server" Text='<%#DataBinder.Eval(

          Container. DataItem,"country") %>' TextMode="MultiLine"></asp:TextBox>       

    </EditItemTemplate>

    <ItemTemplate >

        <asp:Label ID="lblCountry" runat="server" Text='<%#DataBinder.Eval(

                                Container. DataItem,"country") %>'></asp:Label>

    </ItemTemplate>

    <FooterTemplate>

        <asp:TextBox ID="txtAddCountry" runat="server"></asp:TextBox>       

    </FooterTemplate>

    </asp:TemplateField>

    <asp:TemplateField HeaderText="Action" HeaderStyle-Width="150px">

<EditItemTemplate>

    <asp:LinkButton ID="lbtnUpdate" CommandName="Update" runat="server">

                                              Update</asp:LinkButton>

    <asp:LinkButton ID="lbtnCancel"  CommandName="Cancel" runat="server">

                                              Cancel</asp:LinkButton>

</EditItemTemplate>

<ItemTemplate>

    <asp:LinkButton ID="lbtnEdit" runat="server" CommandName="Edit">

                                               Edit</asp:LinkButton>

    <asp:LinkButton ID="lbtnDelete" runat="server" CommandName="Delete">

                                                Delete</asp:LinkButton>

</ItemTemplate>        

<FooterTemplate>

    <asp:LinkButton ID="lbtnAdd" runat="server" CommandName="Add">

                                                   Add</asp:LinkButton>

</FooterTemplate>

</asp:TemplateField>        

</Columns>

    <HeaderStyle BackColor="#666666" Font-Names="Cambria" ForeColor="White"

        Height="30px" />

    <RowStyle Font-Names="Calibri" />

</asp:GridView>

    </div>

    </form>

</body>

</html>

 Code Behind:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Data;

using System.Xml;

 

public partial class _Default : System.Web.UI.Page

{

    protected void Page_Load(object sender, EventArgs e)

    {

        if (!IsPostBack)

        {

            BindGrid();

        }

    }

 

    protected void BindGrid()

    {

        DataSet ds = new DataSet();

        DataTable dt = new DataTable();

 

        ds.ReadXml(Server.MapPath("EmployeeDetails.xml"));

        if (ds != null && ds.HasChanges())

        {

            gvEmployee.DataSource = ds;

            gvEmployee.DataBind();

        }

        else

        {

            gvEmployee.DataBind();

        } 

    }

 

    protected void gvEmployee_OnRowCommand(object sender, GridViewCommandEventArgs e)

    {

    if (e.CommandName.Equals("Add"))

    {

        TextBox txtAddEmpID = (TextBox)gvEmployee.FooterRow.FindControl("txtAddEmpID");

        TextBox txtAddName = (TextBox)gvEmployee.FooterRow.FindControl("txtAddName");

        TextBox txtAddDesignation = (TextBox)gvEmployee.FooterRow.FindControl("txtAddDesignation");

        TextBox txtAddCity = (TextBox)gvEmployee.FooterRow.FindControl("txtAddCity");

        TextBox txtAddCountry = (TextBox)gvEmployee.FooterRow.FindControl("txtAddCountry"); 

        XmlDocument xmldoc = new XmlDocument();

        xmldoc.Load(Server.MapPath("EmployeeDetails.xml"));

        XmlElement parentelement = xmldoc.CreateElement("Employee");

 

        XmlElement empid = xmldoc.CreateElement("empid");

        XmlElement name = xmldoc.CreateElement("name");

        XmlElement designation = xmldoc.CreateElement("designation");

        XmlElement city = xmldoc.CreateElement("city");

        XmlElement country = xmldoc.CreateElement("country");

 

        empid.InnerText = txtAddEmpID.Text;

        name.InnerText = txtAddName.Text;

        designation.InnerText = txtAddDesignation.Text;

        city.InnerText = txtAddCity.Text;

        country.InnerText = txtAddCountry.Text;

           

        parentelement.AppendChild(empid);

        parentelement.AppendChild(name);

        parentelement.AppendChild(designation);

        parentelement.AppendChild(city);

        parentelement.AppendChild(country);

 

        xmldoc.DocumentElement.AppendChild(parentelement);

        xmldoc.Save(Server.MapPath("EmployeeDetails.xml")); 

        BindGrid();

    }

    }

 

    protected void gvEmployee_RowEditing(object sender, GridViewEditEventArgs e)

    {

    gvEmployee.EditIndex = e.NewEditIndex;

    BindGrid();

    }

    protected void gvEmployee_RowDeleting(object sender, GridViewDeleteEventArgs e)

    {

    BindGrid();

    DataSet ds = gvEmployee.DataSource as DataSet;

    ds.Tables[0].Rows[gvEmployee.Rows[e.RowIndex].DataItemIndex].Delete();

    ds.WriteXml(Server.MapPath("EmployeeDetails.xml"));

    BindGrid();

    }

    protected void gvEmployee_RowUpdating(object sender, GridViewUpdateEventArgs e)

    {

 

    int i = gvEmployee.Rows[e.RowIndex].DataItemIndex;

    string Name = (gvEmployee.Rows[e.RowIndex].FindControl("txtName") as TextBox).Text;

    string Designation = (gvEmployee.Rows[e.RowIndex].FindControl("txtDesignation") as TextBox).Text;

    string City = (gvEmployee.Rows[e.RowIndex].FindControl("txtCity") as TextBox).Text;

    string Country = (gvEmployee.Rows[e.RowIndex].FindControl("txtCountry") as TextBox).Text;

 

    gvEmployee.EditIndex = -1;

    BindGrid();

 

    DataSet ds = (DataSet)gvEmployee.DataSource;

    ds.Tables[0].Rows[i]["name"] = Name;

    ds.Tables[0].Rows[i]["designation"] = Designation;

    ds.Tables[0].Rows[i]["city"] = City;

    ds.Tables[0].Rows[i]["country"] = Country;

       

    ds.WriteXml(Server.MapPath("EmployeeDetails.xml"));

    BindGrid();

    }

    protected void gvEmployee_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)

    {

    gvEmployee.EditIndex = -1;

    BindGrid();

    }

    protected void gvEmployee_PageIndexChanging(object sender, GridViewPageEventArgs e)

    {

    gvEmployee.PageIndex = e.NewPageIndex;

    BindGrid();

    } 

}

 

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View demo Download
http://www.dotnetfox.com/Document/1003/1003Demo1.gif

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