Dropdown tag helper improvements

framework/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Dropdown/AbpDropdownButtonTagHelperService.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Text;
 using System.Text.Encodings.Web;
+using System.Threading.Tasks;
 using Microsoft.AspNetCore.Razor.TagHelpers;
 using Microsoft.Extensions.DependencyInjection;
 using Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.Microsoft.AspNetCore.Razor.TagHelpers;
@@ -22,22 +23,25 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Dropdown
             _serviceProvider = serviceProvider;
         }
 
-        public override void Process(TagHelperContext context, TagHelperOutput output)
+        public override async Task ProcessAsync(TagHelperContext context, TagHelperOutput output)
         {
-            var buttonsAsHtml = GetButtonsAsHtml(context, output);
+            var content = await output.GetChildContentAsync();
+
+            var buttonsAsHtml = GetButtonsAsHtml(context, output, content);
 
             output.PreElement.SetHtmlContent(buttonsAsHtml);
 
             output.TagName = "div";
             output.TagMode = TagMode.StartTagAndEndTag;
+            output.Content.SetContent("");
             output.Attributes.Clear();
         }
 
-        protected virtual string GetButtonsAsHtml(TagHelperContext context, TagHelperOutput output)
+        protected virtual string GetButtonsAsHtml(TagHelperContext context, TagHelperOutput output, TagHelperContent content)
         {
             var buttonBuilder = new StringBuilder("");
 
-            var mainButton = GetMainButton(context, output);
+            var mainButton = GetMainButton(context, output, content);
 
             buttonBuilder.AppendLine(mainButton);
 
@@ -51,10 +55,10 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Dropdown
             return buttonBuilder.ToString();
         }
 
-        protected virtual string GetMainButton(TagHelperContext context, TagHelperOutput output)
+        protected virtual string GetMainButton(TagHelperContext context, TagHelperOutput output, TagHelperContent content)
         {
             var abpButtonTagHelper = _serviceProvider.GetRequiredService<AbpButtonTagHelper>();
-
+            
             abpButtonTagHelper.Icon = TagHelper.Icon;
             abpButtonTagHelper.Text = TagHelper.Text;
             abpButtonTagHelper.IconType = TagHelper.IconType;
@@ -64,6 +68,8 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Dropdown
 
             var buttonTag = GetInnerTagHelper(attributes, context, abpButtonTagHelper, "button", TagMode.StartTagAndEndTag);
 
+            buttonTag.PreContent.SetHtmlContent(content.GetContent());
+
             if ((TagHelper.NavLink ?? false) || (TagHelper.Link ?? false))
             {
                 var linkTag = ConvertButtonToLink(buttonTag);

framework/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Dropdown/AbpDropdownTagHelperService.cs

@@ -8,6 +8,7 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Dropdown
         public override void Process(TagHelperContext context, TagHelperOutput output)
         {
             output.TagName = "div";
+            output.Attributes.AddClass("dropdown");
             output.Attributes.AddClass("btn-group");
 
             SetDirection(context, output);