[ACCEPTED]-Is there a way to hide a specific column in a DataGrid when AutoGenerateColumns=True?-datagrid

in your datagrid, subscribe for the AutoGeneratingColumn event, the 3 event args (DataGridAutoGeneratingColumnEventArgs) has the column name and a "Cancel", if 2 the column name is ID then set Cancel = true. should 1 do the trick.

You can use a behavior (reusable code) to 3 do the job... This way you can use attribute 2 which would centralize the column visibility 1 in one place.

Usage:

<Window
...
 xmlns:extension="clr-namespace:WpfControlLibrary.Extension;assembly=WpfControlLibrary">

<DataGrid ...
    extension:DataGridBehavior.UseBrowsableAttributeOnColumn="True">

...

public class YourObjectItem
{
    [Browsable(false)]
        public Assembly Assembly { get; set; }

Code:

using System;
using System.ComponentModel;
using System.Windows;
using System.Windows.Controls;

namespace HQ.Wpf.Util.Behaviors
{
    /// <summary>
    /// Using this behavior on a dataGRid will ensure to display only columns with "Browsable Attributes"
    /// </summary>
    public static class DataGridBehavior
    {
        public static readonly DependencyProperty UseBrowsableAttributeOnColumnProperty =
            DependencyProperty.RegisterAttached("UseBrowsableAttributeOnColumn",
            typeof(bool),
            typeof(DataGridBehavior),
            new UIPropertyMetadata(false, UseBrowsableAttributeOnColumnChanged));

        public static bool GetUseBrowsableAttributeOnColumn(DependencyObject obj)
        {
            return (bool)obj.GetValue(UseBrowsableAttributeOnColumnProperty);
        }

        public static void SetUseBrowsableAttributeOnColumn(DependencyObject obj, bool val)
        {
            obj.SetValue(UseBrowsableAttributeOnColumnProperty, val);
        }

        private static void UseBrowsableAttributeOnColumnChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
        {
            var dataGrid = obj as DataGrid;
            if (dataGrid != null)
            {
                if ((bool)e.NewValue)
                {
                    dataGrid.AutoGeneratingColumn += DataGridOnAutoGeneratingColumn;
                }
                else
                {
                    dataGrid.AutoGeneratingColumn -= DataGridOnAutoGeneratingColumn;
                }
            }
        }

        private static void DataGridOnAutoGeneratingColumn(object sender, DataGridAutoGeneratingColumnEventArgs e)
        {
            var propDesc = e.PropertyDescriptor as PropertyDescriptor;

            if (propDesc != null)
            {
                foreach (Attribute att in propDesc.Attributes)
                {
                    var browsableAttribute = att as BrowsableAttribute;
                    if (browsableAttribute != null)
                    {
                        if (!browsableAttribute.Browsable)
                        {
                            e.Cancel = true;
                        }
                    }

                    // As proposed by "dba" stackoverflow user on webpage: 
                    // https://stackoverflow.com/questions/4000132/is-there-a-way-to-hide-a-specific-column-in-a-datagrid-when-autogeneratecolumns
                    // I added few next lines:
                    var displayName = att as DisplayNameAttribute;
                    if (displayName != null)
                    {
                        e.Column.Header = displayName.DisplayName;
                    }
                }
            }
        }
    }
}

Other possibility would be Visibility.Collapsed:

    private void dataGrid_AutoGeneratingColumn(object sender, 
        DataGridAutoGeneratingColumnEventArgs e)
    {
        //Set properties on the columns during auto-generation 
        switch (e.Column.Header.ToString())
        {
            case "rownameYouWantToHide":
                e.Column.Visibility = Visibility.Collapsed;
                break;
        }
    }

0

I wouldn't say it's great solution... but... you 7 can have one more abstraction layer for 6 example let's say you have an object like:

public class Foo
{
    public string Id { get; set; }

    public string Property2 { get; set; }

    public string Property3 { set; get; }
}

You 5 don't want column for Id, so you create 4 new object

public class Foo2
{
    public string Property2 { get; set; }

    public string Property3 { set; get; }
}

then map/convert Foo to Foo2 and 3 you are done.

Another possible way (not always possible) is to 2 change access modifier to internal

public class Foo
{
    internal string Id { get; set; }

    public string Property2 { get; set; }

    public string Property3 { set; get; }
}

this way you won't 1 have Id column generated either.

I achieved this using Browsable attribute and Visibility: Collapsed

Model

class CourseModel
{
    [Description("")]
    [ReadOnly(false)]
    public bool Select { get; set; } = true; // Checkbox

    [Description("Course ID")]
    [ReadOnly(true)]
    [Browsable(false)]
    public string ID { get; set; } // Hidden column

    [Description("Course Title")]
    [ReadOnly(true)]
    public string Title { get; set; }
}

Custom 1 control extension:

using System.ComponentModel;
using System.Windows;
using System.Windows.Controls;

namespace MyProject.FrontEnd.Controls
{
    class CustomDataGrid : DataGrid
    {
        // Take attributes of POCO, if available (https://stackoverflow.com/a/17255496/979621)

        protected override void OnAutoGeneratingColumn(DataGridAutoGeneratingColumnEventArgs e)
        {
            try
            {
                base.OnAutoGeneratingColumn(e);
                var propertyDescriptor = e.PropertyDescriptor as PropertyDescriptor;
                e.Column.Header = propertyDescriptor.Description;
                e.Column.IsReadOnly = propertyDescriptor.IsReadOnly;
                e.Column.Visibility = propertyDescriptor.IsBrowsable 
                                      ? Visibility.Visible 
                                      : Visibility.Collapsed;
            }
            catch
            {
                // ignore; retain field defaults
            }
        }
    }
}

ViewModel

public ObservableCollection<CourseModel> Courses { get; set; }

XAML

<Window 
    ...
    xmlns:controls="clr-namespace:MyProject.FrontEnd.Controls" 
    ...
>
...
<controls:CustomDataGrid x:Name="courses" 
    ItemsSource="{Binding Path=Courses, Mode=TwoWay, 
                  NotifyOnSourceUpdated=True, NotifyOnTargetUpdated=True}" />

I can't speak for 4, however it was not 12 possible in 3.5 SP1, at least without registering 11 for an event which I wanted to avoid at 10 all costs.

What you could do instead is 9 change your generation code to AutoGenerateColumns=False then just 8 place the columns you care about within 7 the XAML as the underlying data will all 6 still be placed within the columns appropriately 5

            <dg:DataGridTextColumn Header="Display" Binding="{Binding DisplayName}"/>
            <dg:DataGridTextColumn Header="Host" Binding="{Binding HostName}"/>
            <dg:DataGridTextColumn Header="Database" Binding="{Binding Database}"/>
            <dg:DataGridTextColumn Header="Username" Binding="{Binding Username}"/>
            <dg:DataGridTextColumn Header="Password" Binding="{Binding Password}"/>

This will allow you to display the only 4 columns you care about in relation to the 3 underlying model as well as change the Header to 2 display as you see fit, so you are not tied 1 to the Property name on the model.

I've recently done this and wanted to share 13 my solution:

I just made a view model I wanted 12 the datagrid to follow and for the fields 11 I wanted it to ignore (that is, not auto 10 generate columns for), simply set those 9 fields to private. Worked like a charm and 8 there's no need for unnecessary code.

For 7 example, here's the view model I pass to 6 the view that contains the datagrid. I get 5 all I need by simply setting the fields 4 I don't want as columns to private, shown 3 on the "FullPath" field in my example. I 2 understand this may not be possible in every 1 scenario, but worked for me quite well.

namespace dev
{   
    /// <summary>
    /// View model for tag list view in data grid
    /// </summary>
    public class TagDataViewModel : BaseViewModel
    {
        /// <summary>
        /// Default constructor
        /// </summary>
        /// <param name="path">The JSONPath to this item</param>
        public TagDataViewModel(string path)
        {
            FullPath = path;
        }

        /// <summary>
        /// Gets and sets the JSONPath to this item
        /// </summary>
        private string FullPath { get; set; }

        /// <summary>
        /// Gets the name
        /// </summary>
        public string Name => ProjectHelpers.GetPropertyValue(FullPath, "Name");

        /// <summary>
        /// Gets the address
        /// </summary>
        public string Address => ProjectHelpers.GetPropertyValue(FullPath, "Address");

        /// <summary>
        /// Gets the data type
        /// </summary>
        public string DataType => ProjectHelpers.GetPropertyValue(FullPath, "DataType");

        /// <summary>
        /// Gets the scan rate
        /// </summary>
        public string ScanRate => ProjectHelpers.GetPropertyValue(FullPath, "ScanRate");

        /// <summary>
        /// Gets the scaling type
        /// </summary>
        public string ScalingType => ProjectHelpers.GetPropertyValue(FullPath, "ScalingType");
    }
}