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POWPF Binding to IsEnabled Property in ListBox' ContextMenu's MenuItem
 

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  1. POWPF Binding to IsEnabled Property in ListBox' ContextMenu's MenuItem
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    <p>i was looking at the other threads regarding databinding to contextmenus but i couldnt figure out how to get it to work since the suggestions/answers wouldnt work for me.</p> <p>i have a listbox, which is bound to an ObversableCollection - that works fine.</p> <p>now i have a contextmenu inside that listbox. that contextmenu has 4 items to activate, deactivate etc the selected task (which is the item that is represented in the listbox).</p> <p>due to permissions, i need to control, wether the items in the contextmenu are enabled or disabled, so i have to set the IsEnabled-Property of the ContextMenuItem by binding it to the same Collection that the Listbox is bound to.</p> <p>but for some reason, the contextmenu items are not getting disabled - the property seems to be ignored.</p> <hr> <p><strong>EDIT:</strong> i have now implemented your suggestion:</p> <p>WPF</p> <pre><code>&lt;ListView Margin="10,10,10,55" Name="listviewCurrentJobs" ItemsSource="{Binding JobCollection}"&gt; &lt;ListView.ContextMenu&gt; &lt;ContextMenu&gt; &lt;MenuItem Header="Starten" Command="{Binding Path=startCommand}"/&gt; &lt;MenuItem Header="Stoppen" Command="{Binding Path=stopCommand}"/&gt; &lt;MenuItem Header="Aktivieren" Command="{Binding Path=enableCommand}"/&gt; &lt;MenuItem Header="Deaktivieren" Command="{Binding Path=disableCommand}"/&gt; &lt;MenuItem Header="Löschen" Command="{Binding Path=deleteCommand}"/&gt; &lt;/ContextMenu&gt; &lt;/ListView.ContextMenu&gt; &lt;ListView.View&gt; &lt;GridView&gt; &lt;GridViewColumn Header="" Width="32"&gt; &lt;GridViewColumn.CellTemplate&gt; &lt;DataTemplate&gt; &lt;StackPanel Orientation="Horizontal"&gt; &lt;Image Source="{Binding State}" Width="16"/&gt; &lt;/StackPanel&gt; &lt;/DataTemplate&gt; &lt;/GridViewColumn.CellTemplate&gt; &lt;/GridViewColumn&gt; &lt;GridViewColumn Header="Name" DisplayMemberBinding="{Binding Description}" /&gt; &lt;/GridView&gt; &lt;/ListView.View&gt; &lt;/ListView&gt; </code></pre> <p>C#</p> <pre><code>public class currentJob : MonitoringWindow { public string State { get; set; } public string Description { get; set; } public bool startPermitted { get; set; } public bool stopPermitted { get; set; } public bool enablePermitted { get; set; } public bool disablePermitted { get; set; } public bool deletePermitted { get; set; } public ICommand StartCommand { get; private set; } public ICommand StopCommand { get; private set; } public ICommand EnableCommand { get; private set; } public ICommand DisableCommand { get; private set; } public ICommand DeleteCommand { get; private set; } public currentJob() { StartCommand = new DelegateCommand(ExecuteStart, CanExecuteStart); StopCommand = new DelegateCommand(ExecuteStop, CanExecuteStop); EnableCommand = new DelegateCommand(ExecuteEnable, CanExecuteEnable); DisableCommand = new DelegateCommand(ExecuteDisable, CanExecuteDisable); DeleteCommand = new DelegateCommand(ExecuteDelete, CanExecuteDelete); } public bool CanExecuteStart() { return startPermitted; } public bool CanExecuteStop() { return stopPermitted; } public bool CanExecuteEnable() { return enablePermitted; } public bool CanExecuteDisable() { return disablePermitted; } public bool CanExecuteDelete() { return deletePermitted; } public void ExecuteStart() { currentJob curJob = ((currentJob)listviewCurrentJobs.SelectedItem); string curJobName = curJob.Name; if (new TaskService().GetFolder("DocuWare Notifications").Tasks[curJobName].Enabled == false) new TaskService().GetFolder("DocuWare Notifications").Tasks[curJobName].Enabled = true; new TaskService().GetFolder("DocuWare Notifications").Tasks[curJobName].Run(); loadJobs(); } public void ExecuteStop() { if (new TaskService().GetFolder("DocuWare Notifications").Tasks[((currentJob)listviewCurrentJobs.SelectedItem).Name].Enabled == true) { new TaskService().GetFolder("DocuWare Notifications").Tasks[((currentJob)listviewCurrentJobs.SelectedItem).Name].Stop(); loadJobs(); } } public void ExecuteEnable() { new TaskService().GetFolder("DocuWare Notifications").Tasks[((currentJob)listviewCurrentJobs.SelectedItem).Name].Enabled = true; loadJobs(); } public void ExecuteDisable() { new TaskService().GetFolder("DocuWare Notifications").Tasks[((currentJob)listviewCurrentJobs.SelectedItem).Name].Enabled = false; loadJobs(); } public void ExecuteDelete() { new TaskService().GetFolder("DocuWare Notifications").DeleteTask(((currentJob)listviewCurrentJobs.SelectedItem).Name); if (isMsSql) { mssqlconn.Open(); new SqlCommand("DELETE FROM dbo.DocuWareNotifications WHERE NAME = '" + ((currentJob)listviewCurrentJobs.SelectedItem).Name + "'", mssqlconn).ExecuteNonQuery(); mssqlconn.Close(); } else { mysqlconn.Open(); new MySqlCommand("DELETE FROM DocuWareNotifications WHERE NAME = '" + ((currentJob)listviewCurrentJobs.SelectedItem).Name + "'", mysqlconn).ExecuteNonQuery(); mysqlconn.Close(); } loadJobs(); } } public partial class MonitoringWindow : MetroWindow { [...] foreach (Task task in new TaskService().GetFolder("DocuWare Notifications").Tasks) { if (task != null) { currentJob item = new currentJob(); switch (task.State) { case TaskState.Disabled: item.State = "/DWNotDesigner;component/images/disabled.png"; item.Description = task.Name; break; case TaskState.Ready: item.State = "/DWNotDesigner;component/images/active.png"; item.Description = task.Name; break; case TaskState.Running: item.State = "/DWNotDesigner;component/images/working.png"; item.Description = task.Name; break; } item.startPermitted = startPermitted; item.stopPermitted = stopPermitted; item.enablePermitted = enablePermitted; item.disablePermitted = disablePermitted; item.deletePermitted = deletePermitted; _jobCollection.Add(item); } } } </code></pre> <p>for some reason there is no change!</p>
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    1. USJens Langenbach
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