GridViewImageColumn problem

[Imran Aliyev]

I am using Telerik RadGridView in my project. I want to show image in column.

GridViewImageColumn col1 = new GridViewImageColumn();

col1.Width = 100;

col1.DataMemberBinding = new Binding("id");

col1.Header = "PhotoByConverter";

col1.DataMemberBinding.Converter = new ThumbnailConverter();

grid.Columns.Add(col1);

GridViewDataColumn col2 = new GridViewDataColumn();

col2.Width = 100;

col2.DataMemberBinding = new Binding("firstName");

col2.Header = "Person name";

grid.Columns.Add(col2);

Grid.ItemsSource=DataTable;

First column not wokrs but second works fine. I use Converter for image shown below

public class ThumbnailConverter : IValueConverter

{

public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)

{

IEnumerable<thumbNail> result = from n in thumbnails

where n.personID == value.ToString()

select n;

if (result != null && result.First().thumbnail != null)

{

return result.First().thumbnail.file;

}

else

{

return null;

}

}

public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)

{

throw new Exception("The method or operation is not implemented.");

}

}

I found by id thumbnail of person and set it like data for GridViewImageColumn. I checked with Debuger conveter works properly. I can't undesrtand why it doesn't work. Any ideas?

I use 2009 Q3 version.

My converter returns byte[] type

[Imran Aliyev]

İ investigate this problem and found out that with class collection everything works properly, but when I use DataTable image column doesn't work. 

[Vlad]

Hi,

Do you have any invalid bindings in the Visual Studio output window?

Sincerely yours,
Vlad
the Telerik team

Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items.

[Imran Aliyev]

I create a simple project with simple code. This code not works. Name column bound fine, but Image column doesnt work

FileStream fs = new FileStream("c:/temp/pic.jpeg", FileMode.Open, FileAccess.Read);

BinaryReader br = new BinaryReader(fs);

byte[] pic = br.ReadBytes((int)fs.Length);

DataTable dt = new DataTable();

dt.Columns.Add("id");

dt.Columns.Add("Image");

dt.Columns.Add("Name");

dt.Rows.Add("1", pic, "Imran");

dt.Rows.Add("2", pic, "Emin");

MyGrid.ItemsSource=dt;

and my XAML:

<Window x:Class="WpfApplication3.Window1"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

Title="Window1" Height="400" Width="700" Loaded="Window_Loaded"

xmlns:local="clr-namespace:WpfApplication3"

xmlns:telerik="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.GridView">

<Grid>

<telerik:RadGridView AutoGenerateColumns="False" x:Name="MyGrid" >

<telerik:RadGridView.Columns>

<telerik:GridViewImageColumn Header="Image" DataMemberBinding="{Binding Image}" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Name}" Width="150" Header="Name"/>

</telerik:RadGridView.Columns>

</telerik:RadGridView>

</Grid>

</Window>

 Yes I have in my output windows next errors:

System.Windows.Data Error: 39 : BindingExpression path error: 'Image' property not found on 'object' ''DataRow' (HashCode=33813864)'. BindingExpression:Path=Image; DataItem='DataRow' (HashCode=33813864); target element is 'Image' (Name=''); target property is 'Source' (type 'ImageSource')

What does it mean?

[Vlad]

Hi,

You can try DataMemberBinding="{Binding [Image]}" instead.

Regards,
Vlad
the Telerik team

Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items.

[Imran Aliyev]

Thank you very much Vlad. It works!!!