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Blazor Confirm Dialog

Use Blazor Bootstrap confirm dialog component if you want the user to verify or accept something.

Blazor Bootstrap: Confirm Dialog component

Methods

NameReturn TypeDescriptionAdded Version
ShowAsync(string title, string message1, ConfirmDialogOptions confirmDialogOptions = null)Task<bool>Shows confirm dialog.1.1.0
ShowAsync(string title, string message1, string message2, ConfirmDialogOptions confirmDialogOptions = null)Task<bool>Shows confirm dialog.1.1.0
ShowAsync<T>(string title, Dictionary<string, object> parametres = null, ConfirmDialogOptions confirmDialogOptions = null)Task<bool>Shows confirm dialog. T is component.1.1.0

ConfirmDialogOptions Properties

NameTypeDefaultDescriptionAdded Version
DialogCssClassstringAdditional CSS class for the dialog (div.modal-dialog element).1.1.0
DismissableboolAdds a dismissable close button to the confirm dialog.1.1.0
HeaderCssClassstringAdditional header CSS class (div.modal-header element).1.1.0
IsScrollableboolAllows confirm dialog body to be scrollable.1.1.0
IsVerticallyCenteredboolShows the confirm dialog vertically in the center of the page.1.1.0
NoButtonColorButtonColorGets or sets the 'No' button color.1.1.0
NoButtonTextstringNoGets or sets the 'No' button text.1.1.0
SizeDialogSizeModalSize.RegularSize of the modal.1.1.0
YesButtonColorButtonColorButtonColor.PrimaryGets or sets the 'Yes' button color.1.1.0
YesButtonTextstringYesGets or sets the 'Yes' button text.1.1.0

Examples

Confirm Dialog

Blazor Bootstrap: Confirm Dialog Component - Examples
<ConfirmDialog @ref="dialog" />

<Button Color="ButtonColor.Danger" @onclick="ShowConfirmationAsync"> Delete Employee </Button>
@code {
private ConfirmDialog dialog;

private async Task ShowConfirmationAsync()
{
var confirmation = await dialog.ShowAsync(
title: "Are you sure you want to delete this?",
message1: "This will delete the record. Once deleted can not be rolled back.",
message2: "Do you want to proceed?");

if (confirmation)
{
// do whatever
}
else
{
// do whatever
}
}
}

See Confirm Dialog demo here.

Dynamic component as confirm dialog

Render different components dynamically within the confirm dialog without iterating through possible types or using conditional logic.

If dynamically-rendered components have component parameters, pass them as an IDictionary. The string is the parameter's name, and the object is the parameter's value.

In the below example, we used Toast Service to show the user confirmation.

Blazor Bootstrap: Confirm Dialog Component - Dynamic component as confirm dialog
<ConfirmDialog @ref="dialog" />

<Button Color="ButtonColor.Danger" @onclick="DeleteEmployeeAsync"> Delete Employee </Button>
@code {
private ConfirmDialog dialog;

[Inject] ToastService ToastService { get; set; }

private async Task DeleteEmployeeAsync()
{
var parameters = new Dictionary<string, object>();
parameters.Add("EmployeeId", 321);

var confirmation = await dialog.ShowAsync<EmployeeDemoComponent>("Are you sure you want to delete this employee?", parameters);

if (confirmation)
{
// call API to delete the employee
// show acknowledgment to the user
ToastService.Notify(new ToastMessage(ToastType.Success, $"Employee deleted successfully."));
}
else
ToastService.Notify(new ToastMessage(ToastType.Secondary, $"Delete action canceled."));
}
}

EmployeeDemoComponent.razor

<div class="row">
<div class="col-5 col-md-3 text-end">Employee Id :</div>
<div class="col-7 col-md-9">@EmployeeId</div>
</div>
<div class="row">
<div class="col-5 col-md-3 text-end">First Name :</div>
<div class="col-7 col-md-9">@employee.FirstName</div>
</div>
<div class="row">
<div class="col-5 col-md-3 text-end">Last Name :</div>
<div class="col-7 col-md-9">@employee.LastName</div>
</div>

@code {
private Employee employee;

[Parameter] public int EmployeeId { get; set; }

protected override void OnInitialized()
{
// get employee with {EmployeeId} from DB

employee = new Employee { FirstName = "Vikram", LastName = "Reddy" };

base.OnInitialized();
}
}

See Confirm Dialog demo here.

Change buttons text and color

Use ConfirmDialogOptions to change the text and color of the button.

Blazor Bootstrap: Confirm Dialog Component - Change buttons text and color
<ConfirmDialog @ref="dialog" />

<Button Color="ButtonColor.Primary" @onclick="ShowSaveConfirmationAsync"> Save Employee </Button>
@code {
private ConfirmDialog dialog;

private async Task ShowSaveConfirmationAsync()
{
var options = new ConfirmDialogOptions
{
YesButtonText = "OK",
YesButtonColor = ButtonColor.Success,
NoButtonText = "CANCEL",
NoButtonColor = ButtonColor.Danger
};

var confirmation = await dialog.ShowAsync(
title: "Simple Confirm Dialog",
message1: "Do you want to proceed?",
confirmDialogOptions: options);

if (confirmation)
{
// do whatever
}
else
{
// do whatever
}
}
}

See Confirm Dialog demo here.

Optional sizes

Confirm dialog have three optional sizes. These sizes kick in at certain breakpoints to avoid horizontal scrollbars on narrower viewports.

Confirm Dialog Component - Small Size

Blazor Bootstrap: Confirm Dialog Component - Optional sizes - Small

Confirm Dialog Component - Large Size

Blazor Bootstrap: Confirm Dialog Component - Optional sizes - Large

Confirm Dialog Component - Extra Large Size

Blazor Bootstrap: Confirm Dialog Component - Optional sizes - Extra Large
<ConfirmDialog @ref="dialog" />

<Button Color="ButtonColor.Primary" @onclick="() => ShowConfirmationAsync(DialogSize.Small)"> Small Confirm Dialog </Button>
<Button Color="ButtonColor.Primary" @onclick="() => ShowConfirmationAsync(DialogSize.Large)"> Large Confirm Dialog </Button>
<Button Color="ButtonColor.Primary" @onclick="() => ShowConfirmationAsync(DialogSize.ExtraLarge)"> Extra Large Confirm Dialog </Button>
@code {
private ConfirmDialog dialog;

private async Task ShowConfirmationAsync(DialogSize size)
{
var options = new ConfirmDialogOptions { Size = size };

var confirmation = await dialog.ShowAsync(
title: "Simple Confirm Dialog",
message1: "Do you want to proceed?",
confirmDialogOptions: options);

if (confirmation)
{
// do whatever
}
else
{
// do whatever
}
}
}

See Confirm Dialog demo here.

Scrolling long content

When dialogs become too long for the user's viewport or device, they scroll independent of the page itself. Try the demo below to see what we mean.

Blazor Bootstrap: Confirm Dialog Component - Scrolling long content
<ConfirmDialog @ref="dialog" />

<Button Color="ButtonColor.Primary" @onclick="ShowDialogAsync"> Launch Confirm Dialog </Button>
@code {
private ConfirmDialog dialog;

private async Task ShowDialogAsync()
{
var confirmation = await dialog.ShowAsync<LongContentDemoComponent>(title: "Confirm dialog title");

if (confirmation)
{
// do whatever
}
else
{
// do whatever
}
}
}

You can also create a scrollable dialog that allows scroll the dialog body by updating DialogOptions.IsScrollable="true".

Blazor Bootstrap: Confirm Dialog Component - Scrolling long content within the body
<ConfirmDialog @ref="dialog" />

<Button Color="ButtonColor.Primary" @onclick="ShowDialogAsync"> Launch Confirm Dialog </Button>
@code {
private ConfirmDialog dialog;

private async Task ShowDialogAsync()
{
var options = new ConfirmDialogOptions { IsScrollable = true };
var confirmation = await dialog.ShowAsync<LongContentDemoComponent>(
title: "Confirm dialog title",
confirmDialogOptions: options);

if (confirmation)
{
// do whatever
}
else
{
// do whatever
}
}
}

See Confirm Dialog demo here.

Vertically centered

Add DialogOptions.IsVerticallyCentered="true" to vertically center the confirm dialog.

Blazor Bootstrap: Confirm Dialog Component - Vertically centered
<ConfirmDialog @ref="dialog" />

<Button Color="ButtonColor.Primary" @onclick="ShowDialogAsync"> Launch Vertically Centered Confirm Dialog </Button>
@code {
private ConfirmDialog dialog;

private async Task ShowDialogAsync()
{
var options = new ConfirmDialogOptions { IsVerticallyCentered = true };
var confirmation = await dialog.ShowAsync(
title: "Simple Confirm Dialog",
message1: "Do you want to proceed?",
confirmDialogOptions: options);

if (confirmation)
{
// do whatever
}
else
{
// do whatever
}
}
}

You can also create a scrollable dialog that allows scroll the dialog body by updating DialogOptions.IsScrollable="true".

<ConfirmDialog @ref="dialog" />

<Button Color="ButtonColor.Primary" @onclick="ShowDialogAsync"> Launch Scrollable & Vertically Centered Confirm Dialog </Button>

@code {
private ConfirmDialog dialog;

private async Task ShowDialogAsync()
{
var options = new ConfirmDialogOptions { IsScrollable = true, IsVerticallyCentered = true };
var confirmation = await dialog.ShowAsync<LongContentDemoComponent>(title: "Confirm dialog title",
confirmDialogOptions: options);

if (confirmation)
{
// do whatever
}
else
{
// do whatever
}
}
}

See Confirm Dialog demo here.