how to bind a xml file with dropdown

Question

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XML

<book>
  <cat id="08">
    <book id="a" name="india history"/>
    <book id="b" name="india history1"/>
    <book id="c" name="india history2"/>
    <book id="d" name="india history3"/>
    <book id="e" name="india history4"/>
    <book id="f" name="india history5"/>
    <book id="g" name="india history6"/>
    <book id="h" name="india history7"/>
    <book id="i" name="india history8"/>
    <book id="j" name="india history9"/>
    <book id="k" name="india history10"/>
  </cat>
  <cat id="01">

    <book id="a" name="india history"/>
    <book id="b" name="india history1"/>
    <book id="c" name="india history2"/>
    <book id="d" name="india history3"/>
    <book id="e" name="india history4"/>
    <book id="f" name="india history5"/>
    <book id="g" name="india history6"/>
    <book id="h" name="india history7"/>
    <book id="i" name="india history8"/>
    <book id="j" name="india history9"/>
    <book id="k" name="india history10"/>
  </cat>
  <cat id="02">
    <book id="a" name="india history"/>
    <book id="b" name="india history1"/>
    <book id="c" name="india history2"/>
    <book id="d" name="india history3"/>
    <book id="e" name="india history4"/>
    <book id="f" name="india history5"/>
    <book id="g" name="india history6"/>
    <book id="h" name="india history7"/>
    <book id="i" name="india history8"/>
    <book id="j" name="india history9"/>
    <book id="k" name="india history10"/>
  </cat>
  <cat id="03">
    <book id="a" name="india history"/>
    <book id="b" name="india history1"/>
    <book id="c" name="india history2"/>
    <book id="d" name="india history3"/>
    <book id="e" name="india history4"/>
    <book id="f" name="india history5"/>
    <book id="g" name="india history6"/>
    <book id="h" name="india history7"/>
    <book id="i" name="india history8"/>
    <book id="j" name="india history9"/>
    <book id="k" name="india history10"/>
  </cat>
  <cat id="04">
    <book id="a" name="india history"/>
    <book id="b" name="india history1"/>
    <book id="c" name="india history2"/>
    <book id="d" name="india history3"/>
    <book id="e" name="india history4"/>
    <book id="f" name="india history5"/>
    <book id="g" name="india history6"/>
    <book id="h" name="india history7"/>
    <book id="i" name="india history8"/>
    <book id="j" name="india history9"/>
    <book id="k" name="india history10"/>
  </cat>
</book>

above is my xml file and below is my code but its not binding

C#

protected void ddl_price_SelectedIndexChanged(object sender, EventArgs e)
   {
       var id = ddl_price.SelectedItem.Value;
       string path = Server.MapPath("XMLFile2.xml");

       var query = from st in XDocument.Load(path).Descendants("proudct")
                   where (st.Element("cat").Attribute("id").value).ToString() == id
                   select new { Name = st.Element("book").Attribute("name"),  id = st.Element("book").Attribute("id").Value };
       ddl_book.DataTextField = "Name";
       ddl_book.DataValueField = "id";
       ddl_book.DataSource = query;
       ddl_book.DataBind();
   }

Posted 25-Dec-13 22:23pm

Omprakash Kukana

Updated 25-Dec-13 22:25pm

v2

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Tejas Vaishnav · Accepted Answer · 2013-12-26T01:08:00

please use this linq query to get result form your xml file.

C#

var query = (from q in XDocument.Load(path).Descendants("book").Descendants("cat")
                            .Where(q => q.Attribute("id").Value.ToString() == id)
                            .ToList().Descendants("book")
                      select new
                      {
                          Name = q.Attribute("name").Value ?? string.Empty,
                          ID = q.Attribute("id").Value ?? string.Empty
                      }).ToList();

C#

protected void ddl_price_SelectedIndexChanged(object sender, EventArgs e)
        {
            var id = ddl_price.SelectedItem.Value;
            string path = Server.MapPath("XMLFile2.xml");


            var query = (from q in XDocument.Load(path).Descendants("book").Descendants("cat")
                            .Where(q => q.Attribute("id").Value.ToString() == id)
                            .ToList().Descendants("book")
                         select new
                         {
                             Name = q.Attribute("name").Value ?? string.Empty,
                             ID = q.Attribute("id").Value ?? string.Empty
                         }).ToList();


            ddl_book.DataTextField = "Name";
            ddl_book.DataValueField = "ID";
            ddl_book.DataSource = query;
            ddl_book.DataBind();
        }