本文整理汇总了C#中System.Linq.Expressions.Expression.Assign方法的典型用法代码示例。如果您正苦于以下问题：C# Expression.Assign方法的具体用法？C# Expression.Assign怎么用？C# Expression.Assign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.Assign方法的1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;
// To demonstrate the assignment operation, we create a variable.
ParameterExpression variableExpr = Expression.Variable(typeof(String), "sampleVar");
// This expression represents the assignment of a value
// to a variable expression.
// It copies a value for value types, and
// copies a reference for reference types.
Expression assignExpr = Expression.Assign(
variableExpr,
Expression.Constant("Hello World!")
);
// The block expression allows for executing several expressions sequentually.
// In this block, we pass the variable expression as a parameter,
// and then assign this parameter a value in the assign expression.
Expression blockExpr = Expression.Block(
new ParameterExpression[] { variableExpr },
assignExpr
);
// Print out the assign expression.
Console.WriteLine(assignExpr.ToString());
// The following statement first creates an expression tree,
// then compiles it, and then executes it.
Console.WriteLine(Expression.Lambda<Func<String>>(blockExpr).Compile()());输出：
(sampleVar = "Hello World!") Hello World!