Accessing XML Data with Bound DropDown ListRSS

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  TRIMS30

  Member

  40 Points

  220 Posts

  Accessing XML Data with Bound DropDown List

  Jan 10, 2020 05:06 PM|TRIMS30|LINK

  Am trying to use DropDown list bound to an XML data control to select some data from XML file.
  I can easily get DataField and ValueField data - How do i access other fields in selected item?

  Here's some related code below.

  Any help is appreciated

  Lee

  Xml Data
  <Inventory Stock_No="D-362" Description="OIL FILTER" On_Hand="12" Units="EA" Count="0" Change="0" SortKey="6845515450"/>

  Markup
  <asp:DropDownList ID="lstInventory" runat="server" Font-Bold="True" Font-Names="Arial" DataSourceID="XmlInvList" DataTextField="Stock_No" DataValueField="Description" AutoPostBack="True">
  </asp:DropDownList>

  Code Behind
  Private Sub lstInventory_SelectedIndexChanged(sender As Object, e As EventArgs) Handles lstInventory.SelectedIndexChanged
        txtItemDescr.Text = lstInventory.SelectedValue
  'Im able to get both Stock Number and Description fields here.  How do I get ON_HAND and UNITS values from selected item to display in text boxes?

  'txtOnHand.text=????
  'txtUnits.text=????
  
  End Sub

• • Reply
  Rebin.O.Q

  Member

  26 Points

  32 Posts

  Re: Accessing XML Data with Bound DropDown List

  Jan 10, 2020 06:40 PM|Rebin.O.Q|LINK

  Hi TRIMS30, just use linq to xml 
  the following code worked for me well I got both On_Hand and  Units value

  ##the xml file

  <?xml version="1.0" encoding="utf-8" ?>
  <InventoryRoot>
  <Inventory Stock_No="D-362" Description="OIL FILTER" On_Hand="12" Units="EA" Count="0" Change="0" SortKey="6845515450"/>
    </InventoryRoot>
   

  ##ASPX page
  
  

  <asp:DropDownList ID="lstInventory" AppendDataBoundItems="true" runat="server" Font-Bold="True" Font-Names="Arial" DataSourceID="XmlInvList" DataTextField="Stock_No" DataValueField="Description" AutoPostBack="True" OnSelectedIndexChanged="lstInventory_SelectedIndexChanged">
  
  
  
  
  <asp:ListItem Value="-1">Select</asp:ListItem>
  
  </asp:DropDownList>
  
  
          <asp:XmlDataSource ID="XmlInvList" runat="server" DataFile="~/XMLFile1.xml"></asp:XmlDataSource>

  ##The Code behind 

   

  protected void lstInventory_SelectedIndexChanged(object sender, EventArgs e)
          {
             
  
  
              XDocument document = XDocument.Load(Server.MapPath("~/XMLFile1.xml"));
             
              
              var query = from r in document.Descendants("Inventory")
                          where (string)r.Attribute("Stock_No").Value == (lstInventory.SelectedItem.ToString())
                          select new
                          {
                              On_Hand = r.Attribute("On_Hand").Value,
                              Units = r.Attribute("Units").Value
                          };
  
  
             
  
  
  
  
  
              foreach (var item in query)
              {
  
              txtOnHand.text=item.On_Hand; 
                 txtUnits.text=item.Units;
                
                  //Response.Write(item.On_Hand);
  
                  //Response.Write(item.Units);
  
  
  
              }

  I hope it helps you. 

  Mark as answer posts that helped you.
  
• • Reply
  TRIMS30

  Member

  40 Points

  220 Posts

  Re: Accessing XML Data with Bound DropDown List

  Jan 10, 2020 10:35 PM|TRIMS30|LINK

  Rebin:

  Thanks for the example - Unfortunately Im working in VB.Net not C# and not to well versed on c# syntax.

  If possible can you show me example in VB.Net ?

  Lee

• • Reply
  Rebin.O.Q

  Member

  26 Points

  32 Posts

  Re: Accessing XML Data with Bound DropDown List

  Jan 11, 2020 10:02 AM|Rebin.O.Q|LINK

  Hi , you can use online converter C# to VB.NET http://converter.telerik.com/

  ## VB.Net Code
  
  

  Protected Sub lstInventory_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs)
      Dim document As XDocument = XDocument.Load(Server.MapPath("~/XMLFile1.xml"))
      Dim query = From r In document.Descendants("Inventory") Where CStr(r.Attribute("Stock_No").Value) = (lstInventory.SelectedItem.ToString()) Select New With {Key
          .On_Hand = r.Attribute("On_Hand").Value, Key
          .Units = r.Attribute("Units").Value
      }
  
      For Each item In query
          txtOnHand.text = item.On_Hand
          txtUnits.text = item.Units
      Next
  End Sub

  
  
  
  
  

  Mark as answer posts that helped you.