diff --git a/components/cascader/Cascader.razor.cs b/components/cascader/Cascader.razor.cs
index af0df71b..a8d39c38 100644
--- a/components/cascader/Cascader.razor.cs
+++ b/components/cascader/Cascader.razor.cs
@@ -326,7 +326,8 @@ namespace AntDesign
             var node = GetNodeByValue(_nodelist, defaultValue);
             SetSelectedNodeWithParent(node, ref _selectedNodes);
             _renderNodes = _selectedNodes;
-            SetValue(node.Value);
+            if (node != null)
+                SetValue(node.Value);
         }
 
         /// <summary>
diff --git a/components/date-picker/DatePicker.Razor.cs b/components/date-picker/DatePicker.Razor.cs
index 4d511b5a..b6c24bae 100644
--- a/components/date-picker/DatePicker.Razor.cs
+++ b/components/date-picker/DatePicker.Razor.cs
@@ -5,6 +5,16 @@ namespace AntDesign
 {
     public partial class DatePicker : DatePickerBase<DateTime>
     {
+        protected override void OnInitialized()
+        {
+            base.OnInitialized();
+            if (Value != null && Value != DateTime.MinValue)
+            {
+                ChangeValue(Value, 0);
+            }
+        }
+
+
         protected void OnInput(ChangeEventArgs args, int index = 0)
         {
             if (args == null)
diff --git a/components/date-picker/internal/DatePickerBase.cs b/components/date-picker/internal/DatePickerBase.cs
index 4c770ecc..2cce32e2 100644
--- a/components/date-picker/internal/DatePickerBase.cs
+++ b/components/date-picker/internal/DatePickerBase.cs
@@ -451,7 +451,7 @@ namespace AntDesign
 
         public void Close()
         {
-            _dropDown.Hide();
+            _dropDown?.Hide();
         }
 
         public async Task Focus(int index = 0)
@@ -559,6 +559,11 @@ namespace AntDesign
             StateHasChanged();
         }
 
+        /// <summary>
+        /// 修改值
+        /// </summary>
+        /// <param name="value"></param>
+        /// <param name="index"></param>
         public virtual void ChangeValue(DateTime value, int index = 0)
         {
         }
diff --git a/components/input-number/InputNumber.razor.cs b/components/input-number/InputNumber.razor.cs
index 799bd773..de01875d 100644
--- a/components/input-number/InputNumber.razor.cs
+++ b/components/input-number/InputNumber.razor.cs
@@ -140,7 +140,7 @@ namespace AntDesign
         {
             base.OnInitialized();
             SetClass();
-            CurrentValue = DefaultValue;
+            CurrentValue = Value ?? DefaultValue;
         }
 
         private void SetClass()
diff --git a/components/switch/Switch.razor.cs b/components/switch/Switch.razor.cs
index 4d2b1209..e85a45b6 100644
--- a/components/switch/Switch.razor.cs
+++ b/components/switch/Switch.razor.cs
@@ -49,7 +49,7 @@ namespace AntDesign
 
         protected override void OnInitialized()
         {
-            this._isChecked = Checked;
+            this._isChecked = Value ? Value : Checked;
             base.OnInitialized();
         }
 
diff --git a/site/AntBlazor.Docs/Demos/Form/demo/Size.razor b/site/AntBlazor.Docs/Demos/Form/demo/Size.razor
index b6cac5c1..9db52b63 100644
--- a/site/AntBlazor.Docs/Demos/Form/demo/Size.razor
+++ b/site/AntBlazor.Docs/Demos/Form/demo/Size.razor
@@ -1,77 +1,85 @@
 @using System.Text.Json;
 
-    <Form Model="@model"
-          LabelCol="new ColLayoutParam { Span = 8 }"
-          WrapperCol="new ColLayoutParam { Span = 16 }"
-          OnFinish="OnFinish"
-          OnFinishFailed="OnFinishFailed"
-          Size="@model.Size">
-        <FormItem Label="Form Size">
-            <RadioGroup @bind-Value="@context.Size">
-                <Radio RadioButton Value="@AntSizeLDSType.Small">Small</Radio>
-                <Radio RadioButton Value="@AntSizeLDSType.Default">Default</Radio>
-                <Radio RadioButton Value="@AntSizeLDSType.Large">Large</Radio>
-            </RadioGroup>
-        </FormItem>
+<Form Model="@model"
+      LabelCol="new ColLayoutParam { Span = 8 }"
+      WrapperCol="new ColLayoutParam { Span = 16 }"
+      OnFinish="OnFinish"
+      OnFinishFailed="OnFinishFailed"
+      Size="@model.Size">
+    <FormItem Label="Form Size">
+        <RadioGroup @bind-Value="@context.Size">
+            <Radio RadioButton Value="@AntSizeLDSType.Small">Small</Radio>
+            <Radio RadioButton Value="@AntSizeLDSType.Default">Default</Radio>
+            <Radio RadioButton Value="@AntSizeLDSType.Large">Large</Radio>
+        </RadioGroup>
+    </FormItem>
 
-        <FormItem Label="Input">
-            <Input @bind-Value="@context.Input" />
-        </FormItem>
-        <FormItem Label="InputArea">
-            <TextArea @bind-Value="@context.InputArea" />
-        </FormItem>
-        <FormItem Label="Cascader">
-            <Cascader @bind-Value="@context.Cascader" Options="districts" />
-        </FormItem>
-        <FormItem Label="DatePicker">
-            <DatePicker @bind-Value="@context.DatePicker" />
-        </FormItem>
-        <FormItem Label="InputNumber">
-            <AntDesign.InputNumber @bind-Value="@context.Number" />
-        </FormItem>
-        <FormItem Label="Switch">
-            <Switch @bind-Value="@context.Switch" />
-        </FormItem>
-        <FormItem Label="Switch">
-            <RadioGroup @bind-Value="@context.Radio">
-                <Radio RadioButton Value="@("Hangzhou")">Hangzhou</Radio>
-                <Radio RadioButton Value="@("Shanghai")">Shanghai</Radio>
-                <Radio RadioButton Value="@("Beijing")">Beijing</Radio>
-                <Radio RadioButton Value="@("Chengdu")">Chengdu</Radio>
-            </RadioGroup>
-        </FormItem>
-        <FormItem WrapperCol="new ColLayoutParam{ Offset = 8, Span = 16 }">
-            <Button HtmlType="submit">
-                Button
-            </Button>
-        </FormItem>
-    </Form>
+    <FormItem Label="Input">
+        <Input @bind-Value="@context.Input" />
+    </FormItem>
+    <FormItem Label="InputArea">
+        <TextArea @bind-Value="@context.InputArea" />
+    </FormItem>
+    <FormItem Label="Cascader">
+        <Cascader @bind-Value="@context.Cascader" Options="districts" />
+    </FormItem>
+    <FormItem Label="DatePicker">
+        <DatePicker @bind-Value="@context.DatePicker" />
+    </FormItem>
+    <FormItem Label="InputNumber">
+        <AntDesign.InputNumber @bind-Value="@context.Number" />
+    </FormItem>
+    <FormItem Label="Switch">
+        <Switch @bind-Value="@context.Switch" />
+    </FormItem>
+    <FormItem Label="Radio">
+        <RadioGroup @bind-Value="@context.Radio">
+            <Radio RadioButton Value="@("Hangzhou")">Hangzhou</Radio>
+            <Radio RadioButton Value="@("Shanghai")">Shanghai</Radio>
+            <Radio RadioButton Value="@("Beijing")">Beijing</Radio>
+            <Radio RadioButton Value="@("Chengdu")">Chengdu</Radio>
+        </RadioGroup>
+    </FormItem>
+    <FormItem WrapperCol="new ColLayoutParam{ Offset = 8, Span = 16 }">
+        <Button HtmlType="submit">
+            Button
+        </Button>
+    </FormItem>
+</Form>
+
+@model.Switch
 @code
 {
     public class Model
     {
         public string Size { get; set; } = AntSizeLDSType.Small;
-        public string Input { get; set; }
-        public string InputArea { get; set; }
-        public string Cascader { get; set; }
-        public DateTime DatePicker { get; set; }
-        public double Number { get; set; }
-        public bool Switch { get; set; }
-        public string Radio { get; set; }
+        public string Input { get; set; } = "input";
+        public string InputArea { get; set; } = "inputArea";
+        public string Cascader { get; set; } = "11";
+        public DateTime DatePicker { get; set; } = DateTime.Now;
+        public double Number { get; set; } = 1;
+        public bool Switch { get; set; } = true;
+        public string Radio { get; set; } = "Beijing";
     }
 
     private Model model = new Model();
 
     private List<CascaderNode> districts = new List<CascaderNode>
-    {
+{
         new CascaderNode()
         {
             Value = "1",
-            Label = "zhejiang",
+            Label = "浙江",
             Children = new []
-            {
-                new CascaderNode {Value = "11", Label = "hangzhou"},
-            },
+        {
+                new CascaderNode {Value = "11", Label = "杭州"},
+                new CascaderNode {Value = "12", Label = "温州"},
+            }
+        },
+        new CascaderNode()
+        {
+            Value = "2",
+            Label = "上海",
         }
     };
 
@@ -84,4 +92,5 @@
     {
         Console.WriteLine($"Failed:{JsonSerializer.Serialize(model)}");
     }
+
 }
\ No newline at end of file