本文整理汇总了C#中System.Linq.Expressions.Expression.Constant方法的典型用法代码示例。如果您正苦于以下问题:C# Expression.Constant方法的具体用法?C# Expression.Constant怎么用?C# Expression.Constant使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Linq.Expressions.Expression
的用法示例。
在下文中一共展示了Expression.Constant方法的2个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C#代码示例。
示例1:
// Add the following directive to your file:
// using System.Linq.Expressions;
// This expression represents a Constant value.
Expression constantExpr = Expression.Constant(5.5);
// Print out the expression.
Console.WriteLine(constantExpr.ToString());
// You can also use variables.
double num = 3.5;
constantExpr = Expression.Constant(num);
Console.WriteLine(constantExpr.ToString());
输出:
5.5 3.5
示例2: typeof
// Add the following directive to your file:
// using System.Linq.Expressions;
// This expression represents a constant value,
// for which you can explicitly specify the type.
// This can be used, for example, for defining constants of a nullable type.
Expression constantExpr = Expression.Constant(
null,
typeof(double?)
);
// Print out the expression.
Console.WriteLine(constantExpr.ToString());
输出:
null