运营商&&不能应用于system.drawing.color和bool类型的操作数 [英] Operator && cannot be applied to operands of type system.drawing.color and bool

问题描述

你好，我有一个问题，下面结合两个条件，我尝试很多东西使用这两个条件在一起，但它没有用，如果有人可以帮助我或有办法解决这个我会有希望< br $>






谢谢..



我尝试过：

  if （e.Row.RowType == DataControlRowType.DataRow）
 {
  //  把你的控制名称来获取然后检查你的值 
标签lbl = e.Row.FindControl（  Label17） as 标签; 
 
  if （lbl.Text ==  ملغيCancled）
 {
 e.Row.BackColor = Color.Red&&金额==  0 ;  //   ----->问题在这里 
  return ;  //  将在此处停止 
} 
} 

解决方案

问题是&&是一个boolan操作，因此是== - 但是运算符优先级的组合在两个opertors的每一侧都没有相同的类型：

（Color.Red && Amount）== 0 

将bool与int进行比较。

 Color.Red&& （金额== 0）

将颜色与布尔值进行比较。

因此编译抱怨。

我怀疑你打算使用二进制文件AND：

（Color.Red& Amount）== 0 

但是在不知道你的项目的情况下，我无法说出来。

您的意思是：

  if （e.Row.RowType = = DataControlRowType.DataRow）
 {
  //  将控制名称放在此处然后检查为你的价值 
标签lbl = e.Row.FindControl（  Label17） as 标签; 
 
  if （lbl.Text ==  ملغيCancled）
 {
 e.Row.BackColor = Color.Red; 
金额=  0 ; 
  return ; 
} 
} 

 e.Row.BackColor = Color.Red&&金额==  0 ;  //   ----->问题在这里 

是的，这段代码毫无意义，所以没有可能的纠正因为你没有告诉我们它应该做什么。 br />

Quote：<

/ div>我遇到了将两个条件合并到下面的问题

Color.Red 不是条件。

解释你想要什么要做。

[更新]

这也没有意义：

 e。 Row.BackColor =（Color.Red& Amount）==  0 ; 

hello, I have a problem with Combine two condition down below, I try many things to use that two condition together but it didn't work, if someone can help me or have some way to solve this I will be hopeful



Thanks..

What I have tried:

if (e.Row.RowType == DataControlRowType.DataRow)
{
	//put your control name here to get and then check for your value
	Label lbl = e.Row.FindControl("Label17") as Label;

	if (lbl.Text == "ملغي Cancled ")
	{
	   e.Row.BackColor = Color.Red && Amount == 0; // -----> Problem is here
		return; //will stop here
	}
}

解决方案

The problem is that "&&" is a boolan operation, and so is "==" - but no combination of operator precedence ends up with the same types on each side of both opertors:

(Color.Red && Amount) == 0

is comparing a bool to an int.

Color.Red && (Amount == 0)

is comparing a Color to a bool.
So the compile complains.
I suspect you meant to use the binary AND:

(Color.Red & Amount) == 0

But without knowing your project, I can't really tell.

Do you mean:

if (e.Row.RowType == DataControlRowType.DataRow)
{
	//put your control name here to get and then check for your value
	Label lbl = e.Row.FindControl("Label17") as Label;
 
	if (lbl.Text == "ملغي Cancled ")
	{
           e.Row.BackColor = Color.Red;
           Amount = 0;
           return;
	}
}

e.Row.BackColor = Color.Red && Amount == 0; // -----> Problem is here

Yes, this code is meaningless, so there is no possible correction because you didn't told us what it is supposed to do.

Quote:<
/div>I have a problem with Combine two condition down below

Color.Red is not a condition.
Explain what you want to do.
[Update]
This have no meaning either:

e.Row.BackColor = (Color.Red & Amount) == 0;

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