page header initial implementation.

framework/src/Volo.Abp.AspNetCore.Components.WebAssembly/Volo/Abp/AspNetCore/Components/WebAssembly/BreadcrumbItem.cs

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+namespace Volo.Abp.AspNetCore.Components.WebAssembly
+{
+    public class BreadcrumbItem
+    {
+        public string Text { get; set; }
+
+        public string Icon { get; set; }
+
+        public string Url { get; set; }
+
+        public BreadcrumbItem(string text, string url = null, string icon = null)
+        {
+            Text = text;
+            Url = url;
+            Icon = icon;
+        }
+    }
+}

framework/src/Volo.Abp.BlazoriseUI/Components/PageHeader.razor

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+<Row Class="entry-row">
+    <Column ColumnSize="ColumnSize.IsAuto">
+        <h1 class="content-header-title">@Title</h1>
+    </Column>
+    @if (BreadcrumbItems.Any())
+    {
+        <Column ColumnSize="ColumnSize.IsAuto.OnWidescreen" Class="pl-lg-0">
+            <Breadcrumb Mode="@(BreadcrumbShowCurrent ? BreadcrumbMode.Auto : BreadcrumbMode.None)">
+                @if (BreadcrumbShowHome)
+                {
+                    <BreadcrumbItem>
+                        <BreadcrumbLink To="/"><i class="fa fa-home"></i></BreadcrumbLink>
+                    </BreadcrumbItem>
+                }
+                @foreach (var item in BreadcrumbItems)
+                {
+                    <BreadcrumbItem>
+                        <BreadcrumbLink To="@item.Url">
+                            @if (!string.IsNullOrEmpty(item.Icon))
+                            {
+                                <i class="fa @item.Icon"></i>
+                            }
+                            @item.Text
+                        </BreadcrumbLink>
+                    </BreadcrumbItem>
+                }
+            </Breadcrumb>
+        </Column>
+    }
+    <Column>
+        <div class="text-lg-right pt-2">
+            @ChildContent
+        </div>
+    </Column>
+</Row>

framework/src/Volo.Abp.BlazoriseUI/Components/PageHeader.razor.cs

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+using System.Collections.Generic;
+using Microsoft.AspNetCore.Components;
+using Volo.Abp.AspNetCore.Components.WebAssembly;
+
+namespace Volo.Abp.BlazoriseUI.Components
+{
+    public partial class PageHeader : ComponentBase
+    {
+        [Parameter]
+        public string Title { get; set; }
+
+        [Parameter]
+        public bool BreadcrumbShowHome { get; set; } = true;
+
+        [Parameter]
+        public bool BreadcrumbShowCurrent { get; set; } = true;
+
+        [Parameter]
+        public RenderFragment ChildContent { get; set; }
+
+        protected List<BreadcrumbItem> BreadcrumbItems { get; set; }
+
+        public PageHeader()
+        {
+            BreadcrumbItems = new List<BreadcrumbItem>();
+        }
+
+        public void AddBreadcrumbItem(string text, string url = null, string icon = null)
+        {
+            BreadcrumbItems.Add(new BreadcrumbItem(text, url, icon));
+            StateHasChanged();
+        }
+    }
+}