在代码隐藏中将字符串转换为可执行的C#代码 [英] Convert string to executable c# code in code-behind
本文介绍了在代码隐藏中将字符串转换为可执行的C#代码的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
可能重复:
在C#4.0中执行字符串
如何获取此字符串以执行:
How can I get this string to execute:
string dt = "DateTime.Now";
......这样将导致显示今天的日期?:
...so that this would result in today's date being displayed?:
lbl.Text = dt;
推荐答案
使用Codedom解决方案:
Solution with Codedom:
private static string CreateExecuteMethodTemplate(string content)
{
var builder = new StringBuilder();
builder.Append("using System;");
builder.Append("\r\nnamespace Lab");
builder.Append("\r\n{");
builder.Append("\r\npublic sealed class Cal");
builder.Append("\r\n{");
builder.Append("\r\npublic static object Execute()");
builder.Append("\r\n{");
builder.AppendFormat("\r\nreturn {0};", content);
builder.Append("\r\n}");
builder.Append("\r\n}");
builder.Append("\r\n}");
return builder.ToString();
}
private static object Execute(string content)
{
var codeProvider = new CSharpCodeProvider();
var compilerParameters = new CompilerParameters
{
GenerateExecutable = false,
GenerateInMemory = true
};
compilerParameters.ReferencedAssemblies.Add("system.dll");
string sourceCode = CreateExecuteMethodTemplate(content);
CompilerResults compilerResults = codeProvider.CompileAssemblyFromSource(compilerParameters, sourceCode);
Assembly assembly = compilerResults.CompiledAssembly;
Type type = assembly.GetType("Lab.Cal");
MethodInfo methodInfo = type.GetMethod("Execute");
return methodInfo.Invoke(null, null);
}
因此您可以致电:
var result = Execute("DateTime.Now");
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