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V24.2

Generate Image Description

  • 2 minutes to read

The AI-powered “Generate Image Description” extension generates the description for the image.

Generate Image Description - WPF Rich Text Editor, DevExpress

Run Demo: Generate Image Description

Applies To

How It Works

The following animation shows how to use the AI-powered “Generate Image Description” extension in a WPF Rich Text Editor to create Alt text for an image:

Activate Generate Image Description

1. Install DevExpress NuGet Packages

  1. DevExpress.AIIntegration.Wpf
  2. DevExpress.Wpf

Read the following help topics for information on how to obtain the DevExpress NuGet Feed and install DevExpress NuGet packages:

2. Register AI Client

The following code snippet registers an Azure OpenAI client at application startup within the AIExtensionsContainerDesktop container:

using Azure.AI.OpenAI;
using DevExpress.AIIntegration;
using DevExpress.Xpf.Core;
using Microsoft.Extensions.AI;
using System;
using System.Windows;

namespace AIAssistantApp {
    public partial class App : Application {
        static App() {
            CompatibilitySettings.UseLightweightThemes = true;
        }

        protected override void OnStartup(StartupEventArgs e) {
            base.OnStartup(e);
            ApplicationThemeHelper.ApplicationThemeName = "Win11Light";

            IChatClient asChatClient = new AzureOpenAIClient(new Uri(AzureOpenAIEndpoint),
            new System.ClientModel.ApiKeyCredential(AzureOpenAIKey))
            .AsChatClient("GPT4o");
            AIExtensionsContainerDesktop.Default.RegisterChatClient(asChatClient);
        }
    }
}

Tip

Read the following help topic for additional information: How to Register an AI Client.

3. Create and Configure Generate Image Description Behavior

To enable the “Generate Image Description” functionality in a DevExpress WPF Spreadsheet or Rich Text Editor, add mvvm and ai namespaces to the Window and attach GenerateImageDescriptionBehavior to the control:

<dx:ThemedWindow
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:dx="http://schemas.devexpress.com/winfx/2008/xaml/core"
    xmlns:dxsps="http://schemas.devexpress.com/winfx/2008/xaml/spreadsheet"
    xmlns:dxmvvm="http://schemas.devexpress.com/winfx/2008/xaml/mvvm" 
    xmlns:dxai="http://schemas.devexpress.com/winfx/2008/xaml/ai"
    x:Class="AIAssistant.MainWindow"
    Title="MainWindow" Height="800" Width="800">
    <Grid>
        <dxsps:SpreadsheetControl CommandBarStyle="Ribbon" ShowStatusBar="True" ShowFormulaBar="True">
            <dxmvvm:Interaction.Behaviors>
                <dxai:GenerateImageDescriptionBehavior x:Name="GenerateImageDescription"/>
            </dxmvvm:Interaction.Behaviors>
        </dxsps:SpreadsheetControl>
    </Grid>
</dx:ThemedWindow>

4. Define Shortcuts and Bind Commands

The following example defines the following shortcuts:

  • Ctrl+E: executes the Explain Formula extension.
  • Ctrl+G: executes the Generate Image Description extension.
<dx:ThemedWindow
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:dx="http://schemas.devexpress.com/winfx/2008/xaml/core"
    xmlns:dxsps="http://schemas.devexpress.com/winfx/2008/xaml/spreadsheet"
    xmlns:dxmvvm="http://schemas.devexpress.com/winfx/2008/xaml/mvvm" 
    xmlns:dxai="http://schemas.devexpress.com/winfx/2008/xaml/ai"
    x:Class="AIAssitant.MainWindow"
    Title="MainWindow" Height="800" Width="800">
    <Grid>
        <dxsps:SpreadsheetControl CommandBarStyle="Ribbon" ShowStatusBar="True" ShowFormulaBar="True">
            <dxmvvm:Interaction.Behaviors>
                <dxai:ExplainFormulaBehavior x:Name="ExplainFormula"/>
                <dxai:GenerateImageDescriptionBehavior x:Name="GenerateImageDescription"/>
            </dxmvvm:Interaction.Behaviors>
            <dxsps:SpreadsheetControl.InputBindings>
                <KeyBinding Gesture="Ctrl+E"
                    Command="{Binding ElementName=ExplainFormula, Path=ExplainFormulaCommand}"/>
                <KeyBinding Gesture="Ctrl+G"
                    Command="{Binding ElementName=GenerateImageDescription, Path=GenerateImageDescriptionCommand}"/>
            </dxsps:SpreadsheetControl.InputBindings>
        </dxsps:SpreadsheetControl>
        <Button Content="Explain Formula"
            Command="{Binding ElementName=ExplainFormula, Path=ExplainFormulaCommand}"/>
        <Button Content="Describe Picture"
            Command="{Binding ElementName=GenerateImageDescription, Path=GenerateImageDescriptionCommand}"/>
    </Grid>
</dx:ThemedWindow>
See Also