feat(Editor): update return type nullable (#538)

* refactor: 精简代码

* refactor: 返回值更改为可为空

* chore: bump version 9.0.7

Author: ArgoZhang

src/components/BootstrapBlazor.SummerNote/BootstrapBlazor.SummerNote.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Razor">
 
   <PropertyGroup>
-    <Version>9.0.6</Version>
+    <Version>9.0.7</Version>
   </PropertyGroup>
 
   <PropertyGroup>

src/components/BootstrapBlazor.SummerNote/Components/Editor/Editor.razor.cs

@@ -270,7 +270,7 @@ public async Task<string> ClickPluginItem(string pluginItemName)
     /// <param name="size"></param>
     /// <param name="stream"></param>
     [JSInvokable]
-    public async Task<string> ImageUpload(string name, string contentType, long size, IJSStreamReference stream)
+    public async Task<string?> ImageUpload(string name, string contentType, long size, IJSStreamReference stream)
     {
         string? ret = null;
         await using var data = await stream.OpenReadStreamAsync(size);
@@ -279,7 +279,7 @@ public async Task<string> ImageUpload(string name, string contentType, long size
         {
             ret = await OnFileUpload(file);
         }
-        return ret ?? "";
+        return ret;
     }
 
     /// <summary>

src/components/BootstrapBlazor.SummerNote/Components/Editor/Editor.razor.js

@@ -51,8 +51,7 @@ export async function init(id, invoker, methodGetPluginAttrs, methodClickPluginI
                     editor.files = files
                     for (let i = 0; i < files.length; i++) {
                         const file = files[i];
-                        const buffer = await file.arrayBuffer();
-                        const stream = DotNet.createJSStreamReference(buffer);
+                        const stream = DotNet.createJSStreamReference(file);
                         const url = await editor.invoker.invokeMethodAsync('ImageUpload',
                             file.name,
                             file.type || 'application/octet-stream',