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.NET Framework 4.5.2+

IUriProvider Interface

Defines the provider of the locations for external objects in a document export.

Namespace: DevExpress.Office.Services

Assembly: DevExpress.Office.v22.2.Core.dll

NuGet Package: DevExpress.Office.Core

Declaration

[ComVisible(true)]
public interface IUriProvider

Remarks

When the document is exported to a format that implies that a part of the document’s content is located externally, such as HTML format, the IUriProvider interface provides Uniform Resource Identifiers (URI) for the external objects. The IUriProvider.CreateCssUri method processes the style information , and the IUriProvider.CreateImageUri processes images.

Tip

The SubDocument.GetHtmlText method has a parameter that is an object with the IUriProvider interface.

Example

This example demonstrates how to use the DocumentImage.Uri property to set the image’s src attribute when a document is saved in HTML format. You can switch on the HtmlDocumentExporterOptions.EmbedImages option to observe that the custom URI provider is idle for embedded images.

View Example: Retain the Original Image URI in an HTML Document

using DevExpress.Office.Services;
using DevExpress.XtraRichEdit.API.Native;
using DevExpress.XtraRichEdit.Export;
using System;
// ...
        private void richEditControl1_DocumentLoaded(object sender, EventArgs e)
        {
            IUriProviderService service = richEditControl1.GetService<IUriProviderService>();
            if (service != null) {
                service.RegisterProvider(new CustomUriProvider());
            }
        }
        private void richEditControl1_ContentChanged(object sender, EventArgs e)
        {
            ReloadHtml();
        }

        private void ReloadHtml()
        {
            HtmlDocumentExporterOptions exportOptions = new HtmlDocumentExporterOptions();
            exportOptions.EmbedImages = embedImagesCheck.Checked;
            string sText = richEditControl1.Document.GetHtmlText(richEditControl1.Document.Range, new CustomUriProvider(), exportOptions);
            memoEdit1.Text = sText;
        }
using DevExpress.Office.Services;
using DevExpress.Office.Utils;
using System;
// ...
     public class CustomUriProvider : IUriProvider
     {
        public string CreateCssUri(string rootUri, string styleText, string relativeUri)
        {
            return String.Empty;
        }

        public string CreateImageUri(string rootUri, OfficeImage image, string relativeUri)
        {
            return image.Uri;
        }
    }

The following code snippets (auto-collected from DevExpress Examples) contain references to the IUriProvider interface.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

See Also