C#正则表达式文本框验证:只能输入整数和带两位小数的小数

H:\Documents\Workplace\Shell\InputValidate\InputValidate\bin\Debug\InputValidate.exe H:\Documents\Workplace\Shell\InputValidate\InputValidate\bin\Debug\InputValidate.pdb H:\Documents\Workplace\Shell\InputValidate\InputValidate\obj\x86\Debug\InputValidate.Properties.Resources.resources H:\Documents\Workplace\Shell\InputValidate\InputValidate\obj\x86\Debug\InputValidate.csproj.GenerateResource.Cache H:\Documents\Workplace\Shell\InputValidate\InputValidate\obj\x86\Debug\InputValidate.exe H:\Documents\Workplace\Shell\InputValidate\InputValidate\obj\x86\Debug\InputValidate.pdb H:\Documents\Workplace\Shell\InputValidate\InputValidate\obj\x86\Debug\InputValidate.csprojResolveAssemblyReference.cache H:\Documents\Workplace\Shell\InputValidate\InputValidate\bin\Debug\InputValidate.exe.manifest H:\Documents\Workplace\Shell\InputValidate\InputValidate\bin\Debug\InputValidate.application H:\Documents\Workplace\Shell\InputValidate\InputValidate\obj\x86\Debug\InputValidate.exe.manifest H:\Documents\Workplace\Shell\InputValidate\InputValidate\obj\x86\Debug\InputValidate.application H:\Documents\Workplace\Shell\InputValidate\InputValidate\obj\x86\Debug\InputValidate.formTest.resources H:\Documents\Workplace\Shell\InputValidate 620\InputValidate\obj\x86\Debug\InputValidate.exe H:\Documents\Workplace\Shell\InputValidate 620\InputValidate\obj\x86\Debug\InputValidate.pdb H:\Documents\Workplace\Shell\InputValidate 620\InputValidate\bin\Debug\InputValidate.exe.manifest H:\Documents\Workplace\Shell\InputValidate 620\InputValidate\bin\Debug\InputValidate.application H:\Documents\Workplace\Shell\InputValidate 620\InputValidate\bin\Debug\InputValidate.exe H:\Documents\Workplace\Shell\InputValidate 620\InputValidate\bin\Debug\InputValidate.pdb H:\Documents\Workplace\Shell\InputValidate 620\InputValidate\obj\x86\Debug\InputValidate.csprojResolveAssemblyReference.cache H:\Documents\Workplace\Shell\InputValidate 620\InputValidate\obj\x86\Debug\InputValidate.formTest.resources 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H:\Documents\Workplace\Shell\InputValidate 622\InputValidate\bin\Debug\InputValidate.application H:\Documents\Workplace\Shell\InputValidate 622\InputValidate\bin\Debug\InputValidate.exe H:\Documents\Workplace\Shell\InputValidate 622\InputValidate\bin\Debug\InputValidate.pdb H:\Documents\Workplace\Shell\InputValidate 622\InputValidate\obj\x86\Debug\InputValidate.csprojResolveAssemblyReference.cache H:\Documents\Workplace\Shell\InputValidate 622\InputValidate\obj\x86\Debug\InputValidate.formTest.resources H:\Documents\Workplace\Shell\InputValidate 622\InputValidate\obj\x86\Debug\InputValidate.Properties.Resources.resources H:\Documents\Workplace\Shell\InputValidate 622\InputValidate\obj\x86\Debug\InputValidate.csproj.GenerateResource.Cache H:\Documents\Workplace\Shell\InputValidate 622\InputValidate\obj\x86\Debug\InputValidate.exe.manifest H:\Documents\Workplace\Shell\InputValidate 622\InputValidate\obj\x86\Debug\InputValidate.application H:\Documents\Workplace\Shell\InputValidate 622 pm\InputValidate\obj\x86\Debug\InputValidate.exe H:\Documents\Workplace\Shell\InputValidate 622 pm\InputValidate\obj\x86\Debug\InputValidate.pdb H:\Documents\Workplace\Shell\InputValidate 622 pm\InputValidate\bin\Debug\InputValidate.exe.manifest H:\Documents\Workplace\Shell\InputValidate 622 pm\InputValidate\bin\Debug\InputValidate.application H:\Documents\Workplace\Shell\InputValidate 622 pm\InputValidate\bin\Debug\InputValidate.exe H:\Documents\Workplace\Shell\InputValidate 622 pm\InputValidate\bin\Debug\InputValidate.pdb H:\Documents\Workplace\Shell\InputValidate 622 pm\InputValidate\obj\x86\Debug\InputValidate.csprojResolveAssemblyReference.cache H:\Documents\Workplace\Shell\InputValidate 622 pm\InputValidate\obj\x86\Debug\InputValidate.formTest.resources H:\Documents\Workplace\Shell\InputValidate 622 pm\InputValidate\obj\x86\Debug\InputValidate.Properties.Resources.resources H:\Documents\Workplace\Shell\InputValidate 622 pm\InputValidate\obj\x86\Debug\InputValidate.csproj.GenerateResource.Cache H:\Documents\Workplace\Shell\InputValidate 622 pm\InputValidate\obj\x86\Debug\InputValidate.exe.manifest H:\Documents\Workplace\Shell\InputValidate 622 pm\InputValidate\obj\x86\Debug\InputValidate.application I:\InputValidate\InputValidate\obj\x86\Debug\InputValidate.exe I:\InputValidate\InputValidate\obj\x86\Debug\InputValidate.pdb I:\InputValidate\InputValidate\bin\Debug\InputValidate.exe.manifest I:\InputValidate\InputValidate\bin\Debug\InputValidate.application I:\InputValidate\InputValidate\bin\Debug\InputValidate.exe I:\InputValidate\InputValidate\bin\Debug\InputValidate.pdb I:\InputValidate\InputValidate\obj\x86\Debug\InputValidate.csprojResolveAssemblyReference.cache I:\InputValidate\InputValidate\obj\x86\Debug\InputValidate.formTest.resources I:\InputValidate\InputValidate\obj\x86\Debug\InputValidate.Properties.Resources.resources 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