C# 只有赋值、调用、递增、递减和新对象表达式可以用作语句
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原文地址: http://stackoverflow.com/questions/9861164/
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Only assignment, call, increment, decrement, and new object expressions can be used as a statement
提问by Sunny Mark
I am getting this error in condiotional operator.
我在条件运算符中收到此错误。
string remarks="";
AddDgvNew[6, i].Value==null?remarks="":remarks=AddDgvNew[6,i].Value.ToString();
采纳答案by C.Evenhuis
Use
用
string remarks = AddDgvNew[6, i].Value==null?"":AddDgvNew[6,i].Value.ToString();
回答by Jon Skeet
Yes - because you're not doinganything with the result of the conditional expression. You've got a conditional expression which is trying to be a whole statement. In a simpler version:
是的 - 因为你没有对条件表达式的结果做任何事情。你有一个条件表达式，它试图成为一个完整的语句。在更简单的版本中：
bool condition = true;
int x = 10;
int y = 5;
// This is invalid
condition ? x : y;
What did you want to dowith the result of the conditional expression? If the point was to assign it to a variable, then you need to do that. Currently you have twoseparate statements: one declares remarksand assigns it a value; the second is justthe conditional expression.
你想对条件表达式的结果做什么？如果重点是将它分配给一个变量，那么您需要这样做。目前你有两个独立的语句：一个声明remarks并赋值；第二个只是条件表达式。
If you're trying to do something else, you'll need to clarify what you're looking for.
如果您正在尝试做其他事情，则需要澄清您在寻找什么。
