[Solved] How to get SelectedItem(s)

[Tobitux]

Hi Everybody,

because I need to create columns at runtime I use the GridView with the very cool DataTable class. What I'm trying to accomplish is to retrieve the SelectedItems from GridView. My problem is that the SelectedItems property shows the correct number of SelectedItems but all items are Nothing. I can't find out which rows are selected and doesn't get the record back. Here is the code I use to create the GridView. It's just a reduced test code without any deep sense.
           

Dim tester As New ObservableCollection(Of Test)
tester.Add(New Test With {.Name = "Peter"})
tester.Add(New Test With {.Name = "Paul"})
tester.Add(New Test With {.Name = "And"})
tester.Add(New Test With {.Name = "Mary"})

Dim rnd As Random = New Random
Dim table As New DataTable

table.Columns.Add(New DataColumn() With {.ColumnName = "Name", .DataType = GetType(String)})
table.Columns.Add(New DataColumn() With {.ColumnName = "DC", .DataType = GetType(Object)})

            For Each test In tester
                Dim row As DataRow = New DataRow
                row("Name") = test.Name
                row("DC") = test
                table.Rows.Add(row)
            Next

            RadGridView.AutoGenerateColumns = False
            RadGridView.Columns.Clear()

            ' Name
            Dim c = New GridViewDataColumn
            c.Header = "Name"
            Dim b = New Binding("Name")
            c.DataMemberBinding = b
            RadGridView.Columns.Add(c)

            ' Template
            Dim c1 = New GridViewDataColumn()
            c1.Header = "Template"
            c1.CellTemplate = Resources("MyTemplate")
            b = New Binding("DC")
            c1.DataMemberBinding = b
            RadGridView.Columns.Add(c1)


            RadGridView.ItemsSource = table

<UserControl xmlns:telerikGridView="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.GridView"  xmlns:data="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data"  x:Class="DatagridEval.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d" d:DesignWidth="640" d:DesignHeight="480">

    <UserControl.Resources>
    <DataTemplate x:Key="MyTemplate">
        <StackPanel DataContext="{Binding DC}">
            <Button Content="{Binding Name}"></Button>
        </StackPanel>
    </DataTemplate>
    </UserControl.Resources>

    <Grid x:Name="LayoutRoot">
      <telerikGridView:RadGridView x:Name="RadGridView" AutoGenerateColumns="False"></telerikGridView:RadGridView>
  </Grid>
</UserControl>

Thanks in advance,
Tobias

[Tobitux]

Hi,

I even checked out the SelectionChanged Event and discover the SelectionChangeEventArgs. But there I have the same problem. The AddedItems as well as the AddedRecords collection have the correct number of selected rows. But the objects in the AddedItem collection and in AddedRecords(0).Data are Nothing :-(

What must I do to retrieve the SelectedItem/Selected record value?

Thank you,
Tobias

[Tobitux]

Hi Everybody,

I found the solution and would like to share it with you.

As Vlad described here in the Comment from 28 April 2009 you have to do the following to access the SelectedItem and his properties:

if (this.RadGridView1.SelectedRecords.Count == 1)
{
    object objBusinessData = RadGridView1.SelectedItem;
     PropertyInfo[] props = objBusinessData.GetType().GetProperties(BindingFlags.Instance | BindingFlags.Public);

    string sValue = (string)props.Where(pi=>pi.Name == "file_data").FirstOrDefault().GetValue(objBusinessData, null);
    string sAssetTag = (string)props.Where(pi=>pi.Name == "asset_tag").FirstOrDefault().GetValue(objBusinessData, null);

    byte[] fileBytes = Convert.FromBase64String(sValue);

    MemoryStream ms = new MemoryStream(fileBytes);
    BitmapImage image = new BitmapImage();
    ms.Position = 0;
    image.SetSource(ms);
    myImage.Source = image;
}

Yeah, It works!!!
Tobias