refactor: 更新代码

Author: ArgoZhang

src/BootstrapBlazor/Components/Affix/Affix.razor.cs

@@ -41,7 +41,7 @@ public partial class Affix
 
     private string? StyleString => CssBuilder.Default("position: sticky;")
         .AddStyle("z-index", $"{ZIndex}", ZIndex.HasValue)
-        .AddStyle($"{Position.ToDescriptionString()}", $"{Offset}px")
+        .AddStyle(Position.ToDescriptionString(), $"{Offset}px")
         .AddStyleFromAttributes(AdditionalAttributes)
         .Build();
 }

src/BootstrapBlazor/Components/Drawer/Drawer.razor.cs

@@ -19,16 +19,16 @@ public partial class Drawer
         .Build();
 
     private string? StyleString => CssBuilder.Default()
-        .AddStyle("--bb-drawer-position", $"{Position}", !string.IsNullOrEmpty(Position))
+        .AddStyle("--bb-drawer-position", Position)
         .AddStyleFromAttributes(AdditionalAttributes)
         .Build();
 
     /// <summary>
     /// 获得 抽屉 Style 字符串
     /// </summary>
     private string? DrawerStyleString => CssBuilder.Default()
-        .AddStyle("--bb-drawer-width", $"{Width}", !string.IsNullOrEmpty(Width) && Placement != Placement.Top && Placement != Placement.Bottom)
-        .AddStyle("--bb-drawer-height", $"{Height}", !string.IsNullOrEmpty(Height) && (Placement == Placement.Top || Placement == Placement.Bottom))
+        .AddStyle("--bb-drawer-width", Width, Placement != Placement.Top && Placement != Placement.Bottom)
+        .AddStyle("--bb-drawer-height", Height, Placement == Placement.Top || Placement == Placement.Bottom)
         .Build();
 
     /// <summary>