DxContextMenuDataMapping Class
Maps Context Menu item properties to data source fields.
Namespace: DevExpress.Blazor
Assembly: DevExpress.Blazor.v22.2.dll
NuGet Package: DevExpress.Blazor
Declaration
public class DxContextMenuDataMapping :
DxContextMenuDataMappingBase
Remarks
You can populate the Context Menu component with items from a data source.
Follow the steps below to bind Context Menu to data:
Use the Data property to specify a data source. You can use different data types:
- Flat data - a collection of items organized as a single-level structure.
- Hierarchical data - a collection of nested items.
Add the DataMappings tag to the component’s markup.
Create the
DxContextMenuDataMapping
instance and map item properties (BeginGroup, Enabled, and so on) to data source fields. Mappings are used to link the Context Menu data model to the data source.Flat data - use the Key and ParentKey properties to create a hierarchy of items. If the Context Menu’s structure is linear, you can omit these properties.
Hierarchical data - the Children property is required.
You can also create multiple
DxContextMenuDataMapping
instances to specify different mappings for different item levels. Use the Level property to specify the item level for which data mappings are applied.
The code below loads context menu items from the TextFormattingMenu class. Each menu item has child items. The code specifies the Children, Text, IconUrl, and BeginGroup mappings to adjust the context menu data model to the specified data source.
<div style="@Formatting.GetStyleString()" class="demo-preventsel target-container"
@oncontextmenu="((e) => { ContextMenu.ShowAsync(e); } )"
@oncontextmenu:preventDefault>
@* ... *@
</div>
<DxContextMenu Data="@MenuItems" ItemClick="@ItemClick" @ref="@ContextMenu">
<DataMappings>
<DxContextMenuDataMapping Children="Children"
Text="Text"
IconUrl="IconUrl"
BeginGroup="BeginGroup"
Enabled="Enabled" />
</DataMappings>
</DxContextMenu>
@code {
List<TextFormattingMenuItem> menuItems;
List<TextFormattingMenuItem> MenuItems => menuItems = menuItems ?? TextFormattingMenu.ContextMenuItems(Formatting);
DxContextMenu ContextMenu { get; set; }
TextFormatting Formatting { get; set; } = new TextFormatting();
void ItemClick(ContextMenuItemClickEventArgs args) {
((TextFormattingMenuItem)args.ItemInfo.DataItem).Click();
}
}