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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