Could not load file or assembly WPFToolkit

Question

I am trying to use WPFToolkit in my user control dll. I inserted the WPFToolkit in its reference, and my user control dll builds with no error. Then I insert my user control dll into my application, but when my application new an object of my user control dll

  MultiROIStats mroi = new MultiROIStats();

the exception occured, saying:

Additional information: Could not load file or assembly 'WPFToolkit, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.

Here is my user control dll code, the constructor where the error occurs.

View xaml code:

<Window x:Class="MultiROIStats.MultiROIStats"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"    
             xmlns:dg="http://schemas.microsoft.com/wpf/2008/toolkit"              
             mc:Ignorable="d" 
             d:DesignHeight="300" d:DesignWidth="300">
    <Grid>
        <dg:DataGrid ItemsSource="{Binding Path=FileData}" Margin="0,30,0,0" />
        <Button Height="22" HorizontalAlignment="Left" Margin="8,4,0,0"
            Name="button1" VerticalAlignment="Top" Width="48"
            Command="{Binding Path=GetDataCommand}">Button
        </Button>
    </Grid>
</Window>

View C# code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace MultiROIStats
{
    using System.Windows;
    using ViewModel;

    //xmlns:dg="clr-namespace:Microsoft.Windows.Controls;assembly=WpfToolkit"
    /// <summary>
    /// Interaction logic for UserControl1.xaml
    /// </summary>
    public partial class MultiROIStats : Window
    {
        public MultiROIStats()
        {          
            InitializeComponent();    // exception occurs here!
            DataContext = new MultiROIStatsViewModel();
        }
    }
}

I also checked the binary folder of my user control dll, the WPFToolkei.dll is there. So I am confused, and I am wondering how can I correct this error? Thanks.

I think the issue is due to that you are assining DataContext in your usercontrol's constructor. For a Time being please comment out that line. you might not get that issue.If u still have that issue then there might be other cause. — Ashok Rathod
@AshokRathod Thanks. I have tried remove the DataContext line, but the problem is still there. — Ono

NAJ NAJ · Accepted Answer · 2014-07-17T14:27:17

2

votes

Have you maybe tried the NuGet package for the toolkit to see if that works instead?

Could not load file or assembly WPFToolkit

1 Answers