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C#动态代码最近实践

news 2026/5/12 3:55:32

使用动态代码后发现内存暴涨, 修复后,最近实践代码如下:
// 关键是这里, 实现了baseScript复用, 否则每次调用内存都会大幅增长, 容易奔溃
var newScript = baseScript.ContinueWith(code);

usingMicrosoft.CodeAnalysis.CSharp.Scripting;usingMicrosoft.CodeAnalysis.Scripting;publicclassDynamicCode{// 创建脚本选项，添加引用和导入(按需), 使用静态, 复用privatestaticScriptOptionsscriptOptions=ScriptOptions.Default.WithReferences(typeof(List<>).Assembly,typeof(ISqlSugarClient).Assembly,typeof(ZXing.BarcodeFormat).Assembly,typeof(SixLabors.ImageSharp.Image).Assembly,typeof(ZXing.ImageSharp.BarcodeWriter<>).Assembly).WithImports("System","System.Collections.Generic","System.Linq","System.IO","System.Linq.Expressions","System.Threading.Tasks","Newtonsoft.Json.Linq","Yitter.IdGenerator","SqlSugar","Admin.NET.Core","System.Text.RegularExpressions","Newtonsoft.Json","ZXing.Common","ZXing.ImageSharp","SixLabors.ImageSharp","SixLabors.ImageSharp.Formats.Png","SixLabors.ImageSharp.PixelFormats");// 导入命名空间privatestaticScriptbaseScript=CSharpScript.Create("",options:scriptOptions,globalsType:typeof(CSharpScriptGlobals4Print));/// <summary>/// 执行动态C#代码获取数据源/// funBody举例/// var funBody = @"var obj = db.Queryable<BasPrint>().ToList(); return new {list=obj};/// </summary>protectedasyncTask<dynamic>QueryDataWithFunBody(stringfunBody,stringp1,dynamicp2){Log.Warning($"QueryDataWithFunBody p1={p1}");Log.Warning($"QueryDataWithFunBody p2={JSON.Serialize(p2)}");Log.Warning($"QueryDataWithFunBody funBody={funBody}");if(string.IsNullOrWhiteSpace(funBody)){returnnew{};}// 创建脚本运行时，并传入全局变量varnewDb=db.CopyNew();// 创建一个新的数据库连接varutils=newCommonUtils();// 创建脚本运行时，并传入全局变量varglobals=newCSharpScriptGlobals4Print{_db=newDb,utils=utils,_p1_=p1,_p2_=p2,};stringcode=$@"public dynamic Multiply(ISqlSugarClient db, string p1, dynamic p2) {{{funBody}}} Multiply(_db, _p1_, _p2_) ";try{varnewScript=baseScript.ContinueWith(code);// 关键是这里, 实现了baseScript复用, 否则每次调用内存都会大幅增长, 容易奔溃varscriptState=awaitnewScript.RunAsync(globals);// 传入变量, 执行动态代码if(scriptState.ReturnValue!=null){varresult=scriptState.ReturnValue;Log.Warning($"QueryDataWithFunBody data={result}");returnresult;}else{Log.Warning($"QueryDataWithFunBody 没有返回值");returnnull;}}catch(CompilationErrorExceptionex){Log.Error("编译错误[QueryDataWithFunBody]",ex);throwOops.Oh($"编译错误[QueryDataWithFunBody]<br>{ex.Message}");}catch(Exceptionex){Log.Error("执行错误[QueryDataWithFunBody]",ex);throwOops.Oh($"执行错误[QueryDataWithFunBody]<br>{ex.Message}");}}}publicclassCSharpScriptGlobals4Print{publicISqlSugarClient_db;publicCommonUtilsutils;publicstring_p1_;publicdynamic_p2_;}