How do I access textbox text data along with XML content in the listview?

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C#

XML

WPF

Gridview

checkbox

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I have prepared a view in which there is a ListView Control whose ItemSource is being populated with the XML data.However along with the XML data I also required to have a check box and 2 textboxes which takes two different values.

What I have tried:

The view has been achieved with the below xaml code.

<Window.Resources>
        <!--XML Data Source-->
        <XmlDataProvider x:Key="InstrumentList" Source="Instrumentlist.xml"/>
    </Window.Resources>
    <Grid>

        <ListView Height="153" 
              HorizontalAlignment="Left" 
              Name="listView1" 
              VerticalAlignment="Top" 
              Width="503"
              ItemsSource="{Binding Source={StaticResource InstrumentList}, XPath=instrument/instruments}">
            <ListView.View>
                <GridView>
                    <GridView.Columns>
                        <GridViewColumn x:Name="g1" >
                            <GridViewColumn.HeaderTemplate>
                                <DataTemplate >
                                    <CheckBox x:Name="checkall" />
                                </DataTemplate>
                            </GridViewColumn.HeaderTemplate>
                            <GridViewColumn.CellTemplate>
                                <DataTemplate>
                                    <CheckBox IsChecked="False"/>

                                </DataTemplate>
                            </GridViewColumn.CellTemplate>
                        </GridViewColumn>
                        <GridViewColumn  Header="Instrref" />
                        <GridViewColumn Width="120" Header="OrderLimit">
                            <GridViewColumn.CellTemplate>
                                <DataTemplate>
                                    <TextBox Name="txt_OrderLimit" Width="100"/>

                                </DataTemplate>
                            </GridViewColumn.CellTemplate>
                        </GridViewColumn>
                        <GridViewColumn Width="120" Header="ValueLimit">
                            <GridViewColumn.CellTemplate>
                                <DataTemplate>
                                    <TextBox Name="txt_ValueLimit" Width="100"/>

                                </DataTemplate>
                            </GridViewColumn.CellTemplate>
                        </GridViewColumn>

                    </GridView.Columns>


                </GridView>
            </ListView.View>
        </ListView>
        <Button x:Name="button" Content="Submit" HorizontalAlignment="Left" Margin="0,174,0,0" VerticalAlignment="Top" Width="194" Click="button_Click"/>


    </Grid>
</Window>

My Xml file content:

<?xml version="1.0" encoding="utf-8" ?>
<instrument>

  <instruments>
  <instrument_reference>NIFTY12SEP8700CE</instrument_reference>
  </instruments>
  <instruments>
  <instrument_reference>NIFTY12SEP8600CE</instrument_reference>
  </instruments>
  <instruments>
  <instrument_reference>NIFTY12SEP8900CE</instrument_reference>
  </instruments>
  <instruments>
    <instrument_reference>NIFTY12SEP9000CE</instrument_reference>
  </instruments>
  <instruments>
    <instrument_reference>NIFTY12SEP9100CE</instrument_reference>
  </instruments>
  <instruments>
    <instrument_reference>NIFTY12SEP9200CE</instrument_reference>
  </instruments>
</instrument>

Now what I want to achieve is when I checks multiple rows and simultaneouly put some values in the text box then I should be able to store data somewhere only for the checked rows-Instrumentref,textbox1 value,textbox2 value.

I am new to the WPF and finding very difficult to access the values.Please help