Set a Tooltip on the Cells of a Column

Environment

Product Version	2024.2.514
Product	RadGridView for WPF

Description

How to set a tooltip on the cells of a column.

Solution

The ToolTip property of each column type of RadGridView is inherited from the FrameworkContentElement class, which is the base class of all of them. There is no implementation for this property in the context of the columns. Instead, you can use the ToolTipTemplate property.

Setting the ToolTipTemplate property of a GridViewImageColumn

XAML

    <telerik:RadGridView ItemsSource="{Binding MyCollection}"
                         AutoGenerateColumns="False">
        <telerik:RadGridView.Columns>
            <telerik:GridViewImageColumn DataMemberBinding="{Binding MyImagePath}">
                <telerik:GridViewImageColumn.ToolTipTemplate>
                    <DataTemplate>
                        <TextBlock Text="My ToolTip"/>
                    </DataTemplate>
                </telerik:GridViewImageColumn.ToolTipTemplate>
            </telerik:GridViewImageColumn>
        </telerik:RadGridView.Columns>
    </telerik:RadGridView>

You can bind the elements inside the DataTemplate for the ToolTipTemplate property to properties of the underlying data model.

The following example showcases this scenario:

Defining the model and view model

C#

    public class Person
    {
        public string Name { get; set; }
        public string ImagePath { get; set; }
    }

    public class MainViewModel
    {
        public MainViewModel()
        {
            this.People = new ObservableCollection<Person>()
            {
                new Person()
                {
                    Name = "Jack",
                    ImagePath = "jack.png"
                },
            };
        }

        public ObservableCollection<Person> People { get; set; }
    }

Binding the Name property to the element inside the DataTemplate for the ToolTipTemplate property

XAML

    <Grid>
        <Grid.DataContext>
            <local:MainViewModel/>
        </Grid.DataContext>
        <telerik:RadGridView ItemsSource="{Binding People}"
                             AutoGenerateColumns="False">
            <telerik:RadGridView.Columns>
                <telerik:GridViewDataColumn DataMemberBinding="{Binding Name}"/>
                <telerik:GridViewImageColumn DataMemberBinding="{Binding ImagePath}">
                    <telerik:GridViewImageColumn.ToolTipTemplate>
                        <DataTemplate>
                            <TextBlock Text="{Binding Name}"/>
                        </DataTemplate>
                    </telerik:GridViewImageColumn.ToolTipTemplate>
                </telerik:GridViewImageColumn>
            </telerik:RadGridView.Columns>
        </telerik:RadGridView>
    </Grid>

Tooltip of GridViewImageColumn bound to a property of the underlying data model