Narrowing an expression to use a delegate with fewer args

Revision: 15112

at June 24, 2009 12:19 by jmcd

Updated Code

var valueFromSomewhere = "BAR";

Expression<Func<Controller, string, object>> expressionWithArg = (c, s) => c.Action("foo", s);

var methodCallExpression = (MethodCallExpression)expressionWithArg.Body;

var expressionWithoutArg = Expression.Lambda<Func<Controller, object>>(
    Expression.Call(methodCallExpression.Object, methodCallExpression.Method, methodCallExpression.Arguments[0], Expression.Constant(valueFromSomewhere)),
    expressionWithArg.Parameters[0]
    );

Revision: 15111

at June 24, 2009 12:18 by jmcd

Initial Code

Expression<Func<Controller, string, object>> expressionWithArg = (c, s) => c.Action("foo", s);

var methodCallExpression = (MethodCallExpression)expressionWithArg.Body;

var expressionWithoutArg = Expression.Lambda<Func<Controller, object>>(
    Expression.Call(methodCallExpression.Object, methodCallExpression.Method, methodCallExpression.Arguments[0], Expression.Constant(arg)),
    expressionWithArg.Parameters[0]
    );

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Initial Description

Initial Title

Narrowing an expression to use a delegate with fewer args

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Initial Language

C#

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