本文整理匯總了VB.NET中System.Linq.Expressions.Expression.AddAssign方法的典型用法代碼示例。如果您正苦於以下問題：VB.NET Expression.AddAssign方法的具體用法？VB.NET Expression.AddAssign怎麽用？VB.NET Expression.AddAssign使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類System.Linq.Expressions.Expression的用法示例。
在下文中一共展示了Expression.AddAssign方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的VB.NET代碼示例。
示例1: ParameterExpression
' Add the following directive to your file:
' Imports System.Linq.Expressions
' The parameter expression is used to create a variable.
Dim variableExpr As ParameterExpression = Expression.Variable(GetType(Integer), "sampleVar")
' The block expression enables you to execute several expressions sequentually.
' In this block, the variable is first initialized with 1.
' Then the AddAssign method adds 2 to the variable and assigns the result to the variable.
Dim addAssignExpr As BlockExpression = Expression.Block(
New ParameterExpression() {variableExpr},
Expression.Assign(variableExpr, Expression.Constant(1)),
Expression.AddAssign(
variableExpr,
Expression.Constant(2)
)
)
' Print the expression from the block expression.
Console.WriteLine("The expressions from the block expression:")
For Each expr As Expression In addAssignExpr.Expressions
Console.WriteLine(expr.ToString())
Next
Console.WriteLine("The result of executing the expression tree:")
' The following statement first creates an expression tree,
' then compiles it, and then executes it.
Console.WriteLine(Expression.Lambda(Of Func(Of Integer))(addAssignExpr).Compile()())輸出：
The expressions from the block expression: (sampleVar = 1) (sampleVar += 2) The result of executing the expression tree: 3