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Rename images before inserting it in Rich Text Editor in Vue RichTextEditor component

By using the insertImageSettings property, you can specify the server handler to upload the selected image. Then you can bind the imageUploadSuccess event, to receive the modified file name from the server and update it in the Rich Text Editor’s insert image dialog.

<template>
<div>
<div class="control-section">
    <div class="sample-container">
        <div class="default-section">
        <ejs-richtexteditor ref="rteObj" :imageUploadSuccess="onImageUploadSuccess" :insertImageSettings="insertImageSettings" :toolbarSettings="toolbarSettings" ><p>The Rich Text Editor component is WYSIWYG ("what you see is what you get") editor that provides the best user experience to create and update the content. Users can format their content using standard toolbar commands.</p>
        <p><b>Key features:</b></p>
          <ul>
            <li><p>Provides IFRAME and DIV modes</p></li>
            <li><p>Capable of handling markdown editing.</p></li>
            <li><p>Contains a modular library to load the necessary functionality on demand.</p></li>
            <li><p>Provides a fully customizable toolbar.</p></li>
          </ul></ejs-richtexteditor>
        </div>
    </div>
</div>
</template>
<script>
    import Vue from "vue";
    import { RichTextEditorPlugin, Toolbar, Link, Count, Image, HtmlEditor, QuickToolbar } from "@syncfusion/ej2-vue-richtexteditor";

    Vue.use(RichTextEditorPlugin);

    export default {
        data: function() {
            return {
            toolbarSettings: {
                items: ['Bold', 'Italic', 'Underline', 'StrikeThrough','|',
                    'FontName', 'FontSize', 'FontColor', 'BackgroundColor',
                    'LowerCase', 'UpperCase', '|',
                    'Formats', 'Alignments', 'OrderedList', 'UnorderedList',
                    'Outdent', 'Indent', '|',
                    'CreateLink', 'Image', '|', 'ClearFormat', 'Print',
                    'SourceCode', 'FullScreen', '|', 'Undo', 'Redo']
            },
            insertImageSettings: {
                saveUrl: "[SERVICE_HOSTED_PATH]/api/uploadbox/Rename",
                path: "../Images/"
            },
        }
        },
        methods: {
            onImageUploadSuccess: function(args){
                if (args.e.currentTarget.getResponseHeader('name') != null) {
                    args.file.name = args.e.currentTarget.getResponseHeader('name');
                    let filename: any = document.querySelectorAll(".e-file-name")[0];
                    filename.innerHTML = args.file.name.replace(document.querySelectorAll(".e-file-type")[0].innerHTML, '');
                    filename.title = args.file.name;
                }
            },
            provide:{
                richtexteditor: [Toolbar, Link, Count, Image, HtmlEditor, QuickToolbar]
            },
        }
    }
</script>
<style>
@import "../../node_modules/@syncfusion/ej2-base/styles/material.css";
@import "../../node_modules/@syncfusion/ej2-inputs/styles/material.css";
@import "../../node_modules/@syncfusion/ej2-lists/styles/material.css";
@import "../../node_modules/@syncfusion/ej2-popups/styles/material.css";
@import "../../node_modules/@syncfusion/ej2-buttons/styles/material.css";
@import "../../node_modules/@syncfusion/ej2-navigations/styles/material.css";
@import "../../node_modules/@syncfusion/ej2-splitbuttons/styles/material.css";
@import "../../node_modules/@syncfusion/ej2-vue-richtexteditor/styles/material.css";
</style>

To configure the server-side handler, refer the below code.

[AcceptVerbs("Post")]
public void Rename()
{
    try
    {
        var httpPostedFile = System.Web.HttpContext.Current.Request.Files["UploadFiles"];
        imageFile = httpPostedFile.FileName;
        if (httpPostedFile != null)
        {
            var fileSave = System.Web.HttpContext.Current.Server.MapPath("~/Images");
            if (!Directory.Exists(fileSave))
            {
                Directory.CreateDirectory(fileSave);
            }
            var fileName = Path.GetFileName(httpPostedFile.FileName);
            var fileSavePath = Path.Combine(fileSave, fileName);
            while (System.IO.File.Exists(fileSavePath))
            {
                imageFile = "rteImage" + x + "-" + fileName;
                fileSavePath = Path.Combine(fileSave, imageFile);
                x++;
            }
            if (!System.IO.File.Exists(fileSavePath))
            {
                httpPostedFile.SaveAs(fileSavePath);
                HttpResponse Response = System.Web.HttpContext.Current.Response;
                Response.Clear();
                Response.Headers.Add("name", imageFile);
                Response.ContentType = "application/json; charset=utf-8";
                Response.StatusDescription = "File uploaded succesfully";
                Response.End();
            }
        }
    }
    catch (Exception e)
    {
        HttpResponse Response = System.Web.HttpContext.Current.Response;
        Response.Clear();
        Response.ContentType = "application/json; charset=utf-8";
        Response.StatusCode = 204;
        Response.Status = "204 No Content";
        Response.StatusDescription = e.Message;
        Response.End();
    }
}