Add icon to the dialog title and dialog buttons (Predefined Dialogs)

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Valeriy asked on 09 Aug 2022, 01:06 PM | edited on 09 Aug 2022, 01:19 PM

I'm using the "Predefined Dialogs".

... await Dialogs.ConfirmAsync("Are you sure?", Title);

How can I add icon to the dialog title and dialog buttons

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answered on 10 Aug 2022, 02:52 PM | edited on 10 Aug 2022, 02:56 PM

Hello Valeriy,

It's technically possible to add icons to the predefined icons, BUT:

  • It's hackish
  • Not flexible and customizable per Dialog instance
  • Will affect all Dialogs in the app

That's why I recommend using the non-predefined Dialogs instead. The example below is more of a front-end challenge out of curiosity, rather than a real-world use case.

<TelerikButton OnClick="@ShowConfirmWithTitle">Show Confirm</TelerikButton>

    /* common preparation for Dialog icons */
    .k-dialog .k-dialog-title::before,
    .k-dialog .k-dialog-content::before,
    .k-dialog .k-dialog-buttongroup .k-button::before {
        display: inline-block;
        width: 16px;
        height: 22px;
        font-size: 16px;
        font-family: WebComponentsIcons;
        vertical-align: middle;
        position: static;
        opacity: 1;
        background: none transparent;

    /* icon in Dialog title */
    .k-dialog .k-dialog-title::before {
        content: "\e402";
        margin-right: .5em;

    /* icon in Dialog content */
    .k-dialog .k-dialog-content::before {
        content: "\e402";
        margin-right: .2em;

    /* icon in Dialog non-primary button */
    .k-dialog .k-dialog-buttongroup .k-button::before {
        content: "\e115";

    /* icon in Dialog primary button */
    .k-dialog .k-dialog-buttongroup [class*=primary]::before {
        content: "\e118";

@code {
    public DialogFactory Dialogs { get; set; }

    async Task ShowConfirmWithTitle()
        bool isConfirmed = await Dialogs.ConfirmAsync("Are you sure?", "Confirmation");

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