From 6feed5a01ea16c9a7b0387da65b40ba4476065ef Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=98=BF=E5=87=A1=E8=BE=BE?= <wangavatar95@gmail.com>
Date: Thu, 30 Apr 2020 12:27:33 +0800
Subject: [PATCH 1/3] =?UTF-8?q?=E6=9B=B4=E6=94=B9Demo=E9=A1=B5?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/BootstrapBlazor.WebConsole/Pages/Dropdowns.razor   |  2 +-
 .../Pages/Dropdowns.razor.cs                           | 10 +++++++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/BootstrapBlazor.WebConsole/Pages/Dropdowns.razor b/src/BootstrapBlazor.WebConsole/Pages/Dropdowns.razor
index 15d92da4f..cbec21e53 100644
--- a/src/BootstrapBlazor.WebConsole/Pages/Dropdowns.razor
+++ b/src/BootstrapBlazor.WebConsole/Pages/Dropdowns.razor
@@ -61,7 +61,7 @@
     </div>
 </Block>
 
-<Block Title="绑定数据源" Introduction="改变选项时，下拉框内菜单项会增加" CodeFile="dropdown.8.txt">
+<Block Title="绑定数据源" Introduction="改变选项时，下拉框内菜单项会改变" CodeFile="dropdown.8.txt">
     <div class="row">
         <div class="form-group col-12">
             <Radio Items="@RadioItems" OnStateChanged="@OnRadioItemChanged">
diff --git a/src/BootstrapBlazor.WebConsole/Pages/Dropdowns.razor.cs b/src/BootstrapBlazor.WebConsole/Pages/Dropdowns.razor.cs
index 31bb1096a..a05d4a469 100644
--- a/src/BootstrapBlazor.WebConsole/Pages/Dropdowns.razor.cs
+++ b/src/BootstrapBlazor.WebConsole/Pages/Dropdowns.razor.cs
@@ -70,7 +70,15 @@ namespace BootstrapBlazor.WebConsole.Pages
         /// </summary>
         private void OnRadioItemChanged(CheckboxState state, SelectedItem item)
         {
-            RadioDropDownItems.Add(new SelectedItem($"{RadioDropDownItems.Count()}", $"城市 {RadioDropDownItems.Count()}"));
+            var i = 0;
+            RadioDropDownItems = new List<SelectedItem>()
+            {
+                new SelectedItem($"{i++}","Make"),
+                new SelectedItem($"{i++}",".NET"),
+                new SelectedItem($"{i++}","Great"),
+                new SelectedItem($"{i++}","Again"),
+                new SelectedItem($"{i++}",$"{System.DateTime.Now:HH:mm:ss}")
+            };
             StateHasChanged();
         }
 
-- 
Gitee


From 4c18a557ecbd50bbad909e4cf19ad85a481745f7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=98=BF=E5=87=A1=E8=BE=BE?= <wangavatar95@gmail.com>
Date: Thu, 30 Apr 2020 13:16:33 +0800
Subject: [PATCH 2/3] =?UTF-8?q?=E4=BF=AE=E5=A4=8D=E5=85=B3=E4=BA=8E=20Drop?=
 =?UTF-8?q?down=20=E7=BB=84=E4=BB=B6=E7=9A=84=E7=AC=AC=E4=B8=80=E4=B8=AA?=
 =?UTF-8?q?=20item=20=E6=98=BE=E7=A4=BA=E9=97=AE=E9=A2=98?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/BootstrapBlazor/Components/Dropdown/DropdownBase.cs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/BootstrapBlazor/Components/Dropdown/DropdownBase.cs b/src/BootstrapBlazor/Components/Dropdown/DropdownBase.cs
index f6d0be072..6c4995f72 100644
--- a/src/BootstrapBlazor/Components/Dropdown/DropdownBase.cs
+++ b/src/BootstrapBlazor/Components/Dropdown/DropdownBase.cs
@@ -104,6 +104,7 @@ namespace BootstrapBlazor.Components
             await base.SetParametersAsync(parameters);
 
             if (Color == Color.None) Color = Color.Primary;
+            SelectedItem = Items.FirstOrDefault();
         }
     }
 }
-- 
Gitee


From 1174b4ff767753c3e8f679082e6bd86b5b9b0cfa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=98=BF=E5=87=A1=E8=BE=BE?= <wangavatar95@gmail.com>
Date: Thu, 30 Apr 2020 13:28:57 +0800
Subject: [PATCH 3/3] =?UTF-8?q?=E6=9B=B4=E6=96=B0demo?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../Pages/Dropdowns.razor.cs                  | 33 ++++++++++++++-----
 1 file changed, 24 insertions(+), 9 deletions(-)

diff --git a/src/BootstrapBlazor.WebConsole/Pages/Dropdowns.razor.cs b/src/BootstrapBlazor.WebConsole/Pages/Dropdowns.razor.cs
index a05d4a469..4b2ad6ddc 100644
--- a/src/BootstrapBlazor.WebConsole/Pages/Dropdowns.razor.cs
+++ b/src/BootstrapBlazor.WebConsole/Pages/Dropdowns.razor.cs
@@ -66,19 +66,34 @@ namespace BootstrapBlazor.WebConsole.Pages
         }
 
         /// <summary>
-        /// 
+        /// 根据Radio改变切换内容
         /// </summary>
         private void OnRadioItemChanged(CheckboxState state, SelectedItem item)
         {
             var i = 0;
-            RadioDropDownItems = new List<SelectedItem>()
+            switch (item.Text)
             {
-                new SelectedItem($"{i++}","Make"),
-                new SelectedItem($"{i++}",".NET"),
-                new SelectedItem($"{i++}","Great"),
-                new SelectedItem($"{i++}","Again"),
-                new SelectedItem($"{i++}",$"{System.DateTime.Now:HH:mm:ss}")
-            };
+                case "北京":
+                    RadioDropDownItems = new List<SelectedItem>()
+                    {
+                        new SelectedItem($"{i++}","东城区"),
+                        new SelectedItem($"{i++}","西城区"),
+                        new SelectedItem($"{i++}","朝阳区"),
+                        new SelectedItem($"{i++}","丰台区"),
+                        new SelectedItem($"{i++}",$"{System.DateTime.Now:HH:mm:ss}")
+                    };
+                    break;
+                case "上海":
+                    RadioDropDownItems = new List<SelectedItem>()
+                    {
+                        new SelectedItem($"{i++}","黄浦区"),
+                        new SelectedItem($"{i++}","徐汇区"),
+                        new SelectedItem($"{i++}","长宁区"),
+                        new SelectedItem($"{i++}","静安区"),
+                        new SelectedItem($"{i++}",$"{System.DateTime.Now:HH:mm:ss}")
+                    };
+                    break;
+            }
             StateHasChanged();
         }
 
@@ -173,6 +188,6 @@ namespace BootstrapBlazor.WebConsole.Pages
                 Description="下拉框值发生改变时触发",
                 Type ="EventCallback<SelectedItem>"
             }
-       };
+        };
     }
 }
-- 
Gitee