Search in a xml gridview. - asp.net

Question

This is my first question here at Stack Overflow and i will be as precise as possible.
I am working on an ASP.NET Web application and i have a gridview which have a XML as a datasource. I already have it bound as a datasource and it works perfect.
I have a textbox and a button in my project and want to search in the gridview.
Here is an example of one of the nodes in the XML file.
https://i.imgur.com/weTlrh1.png
The problem I currently have is that I am stuck at the search gridview part.
I have as I said before a textbox and a button and when i write a value in the textbox and press on the button i want to search the gridview and its nodes to check if for an example any titles contains the words from the textbox.
Right now I have the corresponding code:
https://i.imgur.com/l2lz8JL.png
This code is in the buttonSearch Click event. The SearchBookBox.text is the Text i want to search for in the Gridview.
I am stuck right now and i need some help.
DataSet ds = new DataSet();
ds.ReadXml(Server.MapPath("/NewFolder1/books.xml"));
GridView1.DataSource = ds;
GridView1.DataBind();
The above code is the code which i bind the gridview to the corresponding xml file. This code is in my Page_Load Event.
I have tried different ideas to solve this issue, but nothing works.
Right now the code is like this:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Xml;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
namespace BookSearch
{
public partial class BookSearchForm : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
ErrorLabel.Visible = false;
AddBooksXML();
}
private void AddBooksXML()
{
if (!IsPostBack)
{
DataSet ds = new DataSet();
ds.ReadXml(Server.MapPath("/NewFolder1/books.xml"));
GridView1.DataSource = ds;
GridView1.DataBind();
}
}
protected void BookSearchButton_Click(object sender, EventArgs e)
{
if(SearchBookBox.Text != null)
{
foreach (XmlNode node in ds.GetXml)
{
}
}
else
{
Response.Write("ERROR!");
}
}
}
}
I really need some help. As i said, i have tried different ideas, but I am stuck and I can't get anywhere.

Answer 1

I think this is a possible solution.
protected void XmlSearch(string searchText)
{
DataSet ds = new DataSet();
ds.ReadXml(Server.MapPath("/NewFolder1/books.xml"));
var dat = from books in ds.Tables[0].AsEnumerable()
where books.Field<string>("author") == searchText || book.Field<string>("title") == searchText
select books;
GridView1.DataSource = dat.CopyToDataTable();
GridView1.DataBind();
}
This will search in author and title for exact matches its probably not the best solution but its a example of how you could do it.
Requires
using System.Linq;
EDIT
If you wanna loop through them you can use
foreach (var book in dat)
{
var bookInfo = String.Format("{0} {1}", book["author"].ToString(), book["title"].ToString());
}