ToolTip in WPF DataGrid (SfDataGrid)

ToolTip provides the support to show the pop-up window that displays the information when the mouse hovers in cells of SfDataGrid.

Record cell tooltip

You can enable the ToolTip for the GridCell by setting the SfDataGrid.ShowToolTip as true.

<syncfusion:SfDataGrid x:Name="dataGrid" 
                       AutoGenerateColumns="True"
                       ShowToolTip="True"
                       ItemsSource="{Binding Orders}" >
</syncfusion:SfDataGrid>
this.dataGrid.ShowToolTip = true;

You can enable the ToolTip for the particular column by setting the GridColumn.ShowToolTip as true.

<syncfusion:SfDataGrid.Columns>
    <syncfusion:GridTextColumn HeaderText="Order ID" ShowToolTip="True" MappingName="OrderID" />
    <syncfusion:GridTextColumn HeaderText="CustomerID" ShowToolTip="True" MappingName="CustomerID" />
</syncfusion:SfDataGrid.Columns>
this.dataGrid.Columns["OrderID"].ShowToolTip = true;
this.dataGrid.Columns["CustomerID"].ShowToolTip = true;

NOTE

GridColumn.ShowToolTip takes higher priority than SfDataGrid.ShowToolTip.

Displaying Record cell tooltip in WPF SfDataGrid

Header tooltip

You can enable the ToolTip for the header cell by setting the GridColumn.ShowHeaderToolTip as true.

<syncfusion:SfDataGrid.Columns>
<syncfusion:GridTextColumn HeaderText="Order ID" ShowHeaderToolTip="True" MappingName="OrderID" />
</syncfusion:SfDataGrid.Columns>
this.dataGrid.Columns["OrderID"].ShowHeaderToolTip = true;

Displaying Header tooltip in WPF SfDataGrid

ToolTip Customization

You can change the appearance of the ToolTip by customizing the style with TargetType as ToolTip.

<Window.Resources>
    <Style x:Name="ToolTipStyle" TargetType="ToolTip">
        <Setter Property="BorderThickness" Value="1,1,1,1" />
        <Setter Property="BorderBrush" Value="Red" />
        <Setter Property="Background" Value="AliceBlue" />
    </Style>
</Window.Resources>

<syncfusion:SfDataGrid.Columns>
    <syncfusion:GridTextColumn HeaderText="Order ID"  ShowToolTip="True" MappingName="OrderID" />
</syncfusion:SfDataGrid.Columns>

Displaying ToolTip appearance customization in WPF SfDataGrid

You can customize the template of ToolTip by using the GridColumn.ToolTipTemplate and GridColumn.ToolTipTemplateSelector properties.

Customize the ToolTip using ToolTipTemplate

You can customize the appearance of the ToolTip for particular column by setting GridColumn.ToolTipTemplate. And you can also customize the appearance of header ToolTip for particular column by GridColumn.HeaderToolTipTemplate property.

<Window.Resources>
    <local:StringToImageConverter x:Key="ImageConverter" />        
    <DataTemplate x:Key="TemplateToolTip">
        <Image Height="100" Width="100" Source="{Binding CustomerID,Converter={StaticResource ImageConverter}}" />
    </DataTemplate>
</Window.Resources>

<syncfusion:SfDataGrid.Columns>
    <syncfusion:GridTextColumn HeaderText="Order ID"  ShowToolTip="True" MappingName="OrderID" />
    <syncfusion:GridTextColumn HeaderText="CustomerID" ToolTipTemplate="{StaticResource TemplateToolTip}" ShowToolTip="True" MappingName="CustomerID" />
</syncfusion:SfDataGrid.Columns>

Displaying ToolTip customization using ToolTipTemplate in WPF SfDataGrid

You can get the sample from here.

Customize the ToolTip with ToolTipTemplateSelector

The different ToolTip template can be loaded in a same column conditionally based on data by setting GridColumn.ToolTipTemplateSelector

<Window.Resources>
    <DataTemplate x:Key="ToolTip1">
        <Grid>
            <Rectangle Fill="Transparent"/>
            <TextBlock Text="{Binding OrderID}" FontWeight="Bold" Background="LightPink"/>
        </Grid>
    </DataTemplate>
    <DataTemplate x:Key="ToolTip2">
        <Grid>
            <Rectangle Fill="Transparent"/>
            <TextBlock Text="{Binding OrderID}" FontStyle="Italic" Background="LightGreen"/>
        </Grid>
    </DataTemplate>
</Window.Resources>

<syncfusion:SfDataGrid.Columns>
    <syncfusion:GridTextColumn HeaderText="Order ID" ShowToolTip="True" MappingName="OrderID" >
        <syncfusion:GridTextColumn.ToolTipTemplateSelector>
            <local:ToolTipTemplateSelector  
                   AlternateTemplate="{StaticResource ToolTip2}"  
                   DefaultTemplate="{StaticResource ToolTip1}" />
        </syncfusion:GridTextColumn.ToolTipTemplateSelector>
    </syncfusion:GridTextColumn>
</syncfusion:SfDataGrid.Columns>
public class ToolTipTemplateSelector : DataTemplateSelector
{
    private DataTemplate _defaultTemplate;
    
    /// <summary>
    /// Gets or sets DefaultTemplate.
    /// </summary>
 
    public DataTemplate DefaultTemplate
    {
        get { return _defaultTemplate; }
        set { _defaultTemplate = value; }
    }

    private DataTemplate _alternateTemplate;
    
    /// <summary>
    /// Gets or Sets AlternateTemplate.
    /// </summary>

    public DataTemplate AlternateTemplate
    {
        get { return _alternateTemplate; }
        set { _alternateTemplate = value; }
    }

    public override System.Windows.DataTemplate SelectTemplate(object item, System.Windows.DependencyObject container)
    {

        //The item that comes from ToolTipTemplate is DataContextHelper. When set SetCellBoundValue to true, it sets DataContextHelper as DataContext to DataTemplate. Refer property section of CellTemplate.
        OrderInfo dataUnit = item as OrderInfo;

        if (dataUnit == null) return this.DefaultTemplate;

        //use reflection to retrieve property
        Type type = dataUnit.GetType();
        PropertyInfo property = type.GetProperty("OrderID");

        //To see what template needs to be select according to the specified property value.

        if (property.GetValue(dataUnit, null).ToString().Contains('9') || property.GetValue(dataUnit, null).ToString().Contains('4'))
            return this.AlternateTemplate;

        else
            return this.DefaultTemplate;
    }
}

The below image refers the DefaultTemplate which is applied through ToolTipTemplateSelector.

Displaying DefaultTemplate for ToolTip using ToolTipTemplateSelector in WPF SfDataGrid

The below image refers the AlternateTemplate which is applied through ToolTipTemplateSelector.

Displaying AlternateTemplate for ToolTip using ToolTipTemplateSelector in WPF SfDataGrid

You can get the sample from here.

Events

CellToolTipOpening event

The CellToolTipOpening event occurs when any tooltip of the cell is opened. The CellToolTipOpening event receives the GridCellToolTipOpeningEventArgs as argument which has the following properties:

  • Column : Gets the hovered cell column in the SfTreeGrid.
  • Record : Gets the data context of hovered cell.
  • RowColumnIndex : Gets the row and column index of the hovered cell.
  • ToolTip : Gets the tooltip of the hovered cells.
<syncfusion:SfDataGrid Name="DataGrid"  
                        CellToolTipOpening="DataGrid_CellToolTipOpening"
                        AutoGenerateColumns="True"
                        ItemsSource="{Binding Orders}">
this.DataGrid.CellToolTipOpening += DataGrid_CellToolTipOpening;

private void DataGrid_CellToolTipOpening(object sender, Syncfusion.UI.Xaml.Grid.GridCellToolTipOpeningEventArgs e)
{
           
}