Handling Image Pasting with Additional Headers and Data in Blazor Rich Text Editor

When pasting images into a Rich Text Editor, it’s critical to include additional headers and custom form data in the image upload request. This article outlines how to manage those requirements using the BeforeImageUpload event in a Blazor component.

Step-by-Step Implementation

1. Define the Rich Text Editor Component: Use the SfRichTextEditor component in your Blazor application, specifying necessary properties and event handlers.

@using Syncfusion.Blazor.RichTextEditor

<SfRichTextEditor>
    <RichTextEditorEvents BeforeUploadImage="@OnBeforeImageUpload"></RichTextEditorEvents>
    <RichTextEditorImageSettings SaveUrl="@SaveURL" Path="@Path">
    </RichTextEditorImageSettings>
</SfRichTextEditor>

2. Configure Image Upload and Customize Requests: To effectively handle image uploads in the rich text editor, configure the backend endpoint and tailor the HTTP request as follows:

@code {
    // Specify the URL and path for image uploads
    private string SaveURL = "https://your-upload-endpoint.com/upload";
    private string Path = "images/";

    // Customize the HTTP request using the BeforeUploadImage event
    private void OnBeforeImageUpload(ImageUploadingEventArgs args)
    {
        // Add custom headers to the request
        args.CurrentRequest = new List<object> 
        { 
            new { Authorization = "Bearer YourToken" }
        };
        
        // Add custom form data
        args.CustomFormData = new List<object>
        {
            new { submitId = "RTE" },
            new { workgroupId = "2" }
        };
    }
}

Additional References

• Blazor Rich Text Editor Events - Syncfusion

By leveraging the BeforeImageUpload event in the Rich Text Editor component, you enhance your application’s image upload functionality, ensuring all necessary headers and data are included in the request. This approach is ideal for maintaining secure and customized interactions with your image storage backend