refactor: 增加 UI 显示逻辑

Author: ArgoZhang

src/BootstrapBlazor/Components/DateTimePicker/DatePickerBody.razor.cs

@@ -539,7 +539,12 @@ private async Task UpdateDisabledDaysCache(bool force)
         }
     }
 
-    private bool IsDisableDay(DateTime val)
+    /// <summary>
+    /// 判定当前日期是否为禁用日期
+    /// </summary>
+    /// <param name="val"></param>
+    /// <returns></returns>
+    public bool IsDisableDay(DateTime val)
     {
         bool ret = false;
         if (_monthDisabledDaysCache.TryGetValue($"{StartDate:yyyyMMdd}-{EndDate:yyyyMMdd}", out var disabledDays))

src/BootstrapBlazor/Components/DateTimePicker/DateTimePicker.razor

@@ -18,7 +18,7 @@
                     ShowLunar="ShowLunar" ShowSolarTerm="ShowSolarTerm" ShowFestivals="ShowFestivals" ShowHolidays="ShowHolidays"
                     OnConfirm="OnConfirm" OnClear="OnClear" MinValue="MinValue" MaxValue="MaxValue"
                     AutoClose="AutoClose" ViewMode="ViewMode" DayTemplate="DayTemplate!" DayDisabledTemplate="DayDisabledTemplate!"
-                    OnGetMonthDisabledDaysCallback="OnGetMonthDisabledDaysCallback!"
+                    OnGetMonthDisabledDaysCallback="OnGetMonthDisabledDaysCallback!" @ref="_datePickerBody"
                     EnableGetMonthDisabledDaysCache="EnableGetMonthDisabledDaysCache">
         @ChildContent
     </DatePickerBody>

src/BootstrapBlazor/Components/DateTimePicker/DateTimePicker.razor.cs

@@ -234,6 +234,8 @@ public string? Format
 
     private DateTime SelectedValue { get; set; }
 
+    private DatePickerBody? _datePickerBody = default;
+
     /// <summary>
     /// <inheritdoc/>
     /// </summary>
@@ -317,14 +319,27 @@ protected override string FormatValueAsString(TValue value)
             d = v2.DateTime;
         }
 
-        if (d.HasValue && MinValueToToday(d.Value))
-        {
-            d = DateTime.Today;
-        }
-
-        if (d.HasValue && !MinValueToEmpty(d.Value))
+        if (d.HasValue)
         {
-            ret = d.Value.ToString(ViewMode == DatePickerViewMode.DateTime ? DateTimeFormat : DateFormat);
+            if (MinValueToToday(d.Value))
+            {
+                d = DateTime.Today;
+            }
+
+            if (_datePickerBody != null)
+            {
+                var isDisabled = _datePickerBody.IsDisableDay(d.Value);
+                if (isDisabled)
+                {
+                    d = DateTime.MinValue;
+                }
+
+                var isEmpty = MinValueToEmpty(d.Value);
+                if (!isEmpty)
+                {
+                    ret = d.Value.ToString(ViewMode == DatePickerViewMode.DateTime ? DateTimeFormat : DateFormat);
+                }
+            }
         }
         return ret;
     }