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鸡肋还是革新——Blazor进WinForm

桂素伟 3068

前言:

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winform是一老技术,感觉都有点掉牙了(我近20年前就是从winform开始接触.net的);blazor,是微软技术圈里的新宠,正在被悉心照顾。当这一老一少的技术碰撞后,会有什么火花?

.net v6.0.0-preview.3,给winform和blazor结合带来了前提。 是我写的一个简单的demo,在winform窗体中引入blazor。

先看一下长什么样子:

是一个简单的用助记码查询药品的例子,输入框查询按钮,table的样式都是Bootstrap5.0的,外层是一个winform的Form窗体。

具体实现,先看项目文件csproj的不一样:Sdk要换成Microsoft.NET.Sdk.Razor,然后是要通过nuget引入这些包。

<Project Sdk="Microsoft.NET.Sdk.Razor">  <PropertyGroup>    <OutputType>WinExe</OutputType>    <TargetFramework>net6.0-windows</TargetFramework>    <UseWindowsForms>true</UseWindowsForms>  </PropertyGroup>  <ItemGroup>    <PackageReference Include="Dapper" Version="2.0.78" />    <PackageReference Include="Microsoft.AspNetCore.Components.WebView.WindowsForms" Version="6.0.0-preview.3.21201.13" />    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="6.0.0-preview.3.21201.4" />    <PackageReference Include="Microsoft.NET.Sdk.Razor" Version="5.0.0-preview.8.20414.8" />    <PackageReference Include="System.Data.SqlClient" Version="4.8.2" />  </ItemGroup>  <ItemGroup>    <Content Update="wwwroot\app.css">      <CopyToOutputDirectory>Always</CopyToOutputDirectory>    </Content>    <Content Update="wwwroot\Query.razor">      <CopyToOutputDirectory>Always</CopyToOutputDirectory>    </Content>    <Content Update="wwwroot\css\bootstrap.min.css">      <CopyToOutputDirectory>Always</CopyToOutputDirectory>    </Content>    <Content Update="wwwroot\index.html">      <CopyToOutputDirectory>Always</CopyToOutputDirectory>    </Content>    <Content Update="wwwroot\js\bootstrap.min.js">      <CopyToOutputDirectory>Always</CopyToOutputDirectory>    </Content>  </ItemGroup>  <ItemGroup>    <None Update="wwwroot\app.css">      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>    </None>    <None Update="wwwroot\Query.razor">      <CopyToOutputDirectory>Always</CopyToOutputDirectory>    </None>    <None Update="wwwroot\index.html">      <CopyToOutputDirectory>Always</CopyToOutputDirectory>    </None>  </ItemGroup></Project>

通过csproj也知道,我是添加了wwwroot文件夹,并添加了一些前端文件:

index.html是一个模板页,引入一些css和js

<!DOCTYPE html><html><head>    <meta charset="utf-8" />    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />    <title>Blazor app</title>    <base href="/" />    <link href="{PROJECT NAME}.styles.css" rel="stylesheet" />    <link href="app.css" rel="stylesheet" />    <link href="css/bootstrap.min.css" rel="stylesheet" /></head><body>    <div id="app"  class="container"></div>    <div id="blazor-error-ui">        An unhandled error has occurred.        <a href="" class="reload">Reload</a>        <a class="dismiss"></a>    </div>    <script src="_framework/blazor.webview.js"></script>    <script src="js/bootstrap.min.js"></script></body></html>

css和js就不说了,是前端的文件,重点看query.razor,这里实现了主要业务逻辑,业务数据+UI表现

@using Microsoft.AspNetCore.Components.Web@using Dapper@using System.Data.SqlClient;<div class="row">  <div class="col-1"></div>  <div class="col-10">    <div class="input-group mb-3">      <input type="text" class="form-control" id="zjm" placeholder="请输入助记码" @bind="ZJM" aria-describedby="button-addon2">      <button class="btn btn-outline-secondary" type="button" @onclick="GetGoods" id="button-addon2">查询</button>    </div>  </div>  <div class="col-1"></div></div>@code {  private string ZJM { get; set; }  List<Goods> list = new List<Goods>();  void GetGoods()  {    using (var con = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["sqlcon"].ConnectionString))    {      if (string.IsNullOrWhiteSpace(ZJM))      {        list = con.Query<Goods>("select top 30 spid,spmch,shpchd,shpgg from spkfk  ").ToList();      }      else      {        list = con.Query<Goods>("select top 30 spid,spmch,shpchd,shpgg from spkfk where zjm like @zjm ",new  {zjm="%"+ZJM+"%" }).ToList();      }    }  }}<div class="row">  <table class="table table-striped table-hover">    <thead>      <tr class="table-dark">        <th scope="col">编号</th>        <th scope="col">名称</th>        <th scope="col">产地</th>        <th scope="col">规格</th>      </tr>    </thead>    <tbody>      @foreach (var item in list)      {       <tr>          <td>@item.spid</td>          <td>@item.spmch</td>          <td>@item.shpchd</td>          <td>@item.shpgg</td>        </tr>      }  </tbody> </table></div>

怎么引入到form窗体中呢?这里有点像之前的winform中引入一个webview,这里换成了BlazorWebView。

using BlazorWinForm.wwwroot;using Microsoft.AspNetCore.Components.WebView.WindowsForms;using Microsoft.Extensions.DependencyInjection;using System.Windows.Forms;namespace BlazorWinForm{    public partial class frmMain : Form    {        public frmMain()        {            InitializeComponent();            var serviceCollection = new ServiceCollection();            serviceCollection.AddBlazorWebView();            var blazor = new BlazorWebView()            {                Dock = DockStyle.Fill,                HostPage = "wwwroot/index.html",                Services = serviceCollection.BuildServiceProvider(),             };            blazor.AutoScroll = false;            blazor.RootComponents.Add<Query>("#app");            Controls.Add(blazor);        }    }    class Goods    {        public string spid { get; set; }        public string spmch { get; set; }        public string shpchd { get; set; }        public string shpgg { get; set; }    }}

总体下来,这种把winform+c#+html,css,js混合起来编程,即把丰富的前端框架引入进来,让winform表现更加灵活,强大,也不丢失cs架构对当前电脑的控制力(有很多行业是通过exe来对接专有设备的驱动的)。winform的UI之前是通过三方UI控件比如DevExpress来增强的,虽然有WPF,但还是在微软自己画的一个圈圈里转,blazor则是带来了丰富的前端库。另外,与之前winform嵌入webview不一样的是,blazor中的c#,可以方便的和winform来互动,语言相通,直接交流,比如你可以很轻松的在blazor的页里里new一个form出来。

Blazor进winform,是鸡肋还是革新?应该是仁者见仁,智者见智了。

标签: #nethtml编辑