doc: update verify vat invoice sample code (#351)

Co-authored-by: alex chow <zhouchuanglin@gmail.com>
Co-authored-by: lambert lee <1708416@qq.com>
Co-authored-by: lambert lee <lish@live.cn>

Author: 4 people

src/BootstrapBlazor.Shared/Demos/BaiduOcr/BaiduOcrVerifyVatInvoice.razor

@@ -5,7 +5,7 @@
 <ValidateForm Model="Model" OnValidSubmit="@Verify">
     <EditorForm TModel="InvoiceForm" RowType="RowType.Inline" AutoGenerateAllItem="false">
         <FieldItems>
-            <EditorItem @bind-Field="@context.InvoiceType" Text="发票种类" Readonly="true" />
+            <EditorItem @bind-Field="@context.InvoiceType" Text="发票种类" />
             <EditorItem @bind-Field="@context.InvoiceCode" Text="发票代码" />
             <EditorItem @bind-Field="@context.InvoiceNum" Text="发票号码" />
             <EditorItem @bind-Field="@context.InvoiceDate" Text="开票日期" PlaceHolder="YYYYMMDD" />
@@ -18,26 +18,22 @@
     </EditorForm>
 </ValidateForm>
 
-@if (InvoiceVerifyResult != null)
-{
-    <div class="mt-3">@InvoiceVerifyResult.VerifyMessage</div>
-}
-
 @code {
-    /// <summary>
-    /// 取消请求令牌
-    /// </summary>
     private CancellationTokenSource? TokenSource { get; set; }
 
-    private InvoiceVerifyResult? InvoiceVerifyResult { get; set; }
-
     private InvoiceForm Model { get; set; } = new() { InvoiceType = "elec_special_vat_invoice", TotalAmount = "0" };
 
     private async Task Verify(EditContext context)
     {
         var result = await OcrService.VerifyInvoiceAsync(Model.InvoiceCode, Model.InvoiceNum, Model.InvoiceDate, Model.InvoiceType, Model.CheckCode, Model.TotalAmount);
-        InvoiceVerifyResult = result.Entity;
-        StateHasChanged();
+        if (result.ErrorCode != 0)
+        {
+            await ToastService.Information("Verify Vat", $"{result.ErrorCode}: {result.ErrorMessage}");
+        }
+        else if (result.Entity != null)
+        {
+            await ToastService.Success("Verify Vat", result.Entity?.VerifyMessage);
+        }
     }
 
     /// <summary>