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鸡肋还是革新——Blazor进WinForm

  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。https://github.com/axzxs2001/Asp.NetCoreExperiment/tree/master/Asp.NetCoreExperiment/Blazor/BlazorWinForm  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:

  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。

 

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posted @ 2022-02-04 16:45  桂素伟  阅读(658)  评论(0编辑  收藏  举报