运算符'=='不能应用于类型为'string'和'int'的操作数 [英] Operator '==' cannot be applied to operands of type 'string' and 'int'

问题描述

大家好，

hi all,

string[] result=new string [4];
      string accessnumber = null;
      accessnumber = "";
      result = clsObj.FnCheckAccessNo();
      if (result[0] == 1)
      {
          accessnumber = result[2];
      }

我尝试使用这种情况来显示以下错误，如果有人知道，请告诉我..

运算符"=="不能应用于类型为"string"和"int"的操作数



源错误:

第160行:accessnumber =";
第161行:result = clsObj.FnCheckAccessNo();
第162行: 如果(结果[0] == 1)
第163行:{
第164行:accessnumber = result [2];

Am try to use this condition it shows the follwing error, please let me know if anybody knows..

Operator ''=='' cannot be applied to operands of type ''string'' and ''int''



Source Error:

Line 160: accessnumber = "";
Line 161: result = clsObj.FnCheckAccessNo();
Line 162: if (result[0] == 1)
Line 163: {
Line 164: accessnumber = result[2];

推荐答案

由于result是一个字符串数组，因此result [0]是一个字符串. 1是int文字.很正常，您无法比较它们.
怎么回事:if (result[0] == "1")?

As result is an array of strings, result[0] is a string. 1 is an int literal. It is normal, that you can not compare them.
What about: if (result[0] == "1") ?

由于错误消息已经全部说明了，所以没有什么可添加的.
您不能使用==运算符将字符串与整数进行比较.
您想要实现什么?

您可以比较两个数字，例如

There is not much to add since the error message allready says it all...
You can no compare a String with an Integer using the == operator.
What is it you want to achieve?

You can compare two numbers like

int a = 0;
if (a == 0) ...

或两个字符串

or two Strings

string word  = "Hello";
if (word == "Bark") ...

但不是

but not

if (a == word)

...

也许现在您看到代码中的问题了吗?

...

Maybe now you see what is wrong in your code?

if (result[0] == (1).ToString())

或

or

if (result[0] == "1")

祝您编码愉快！
:)

Happy Coding!
:)

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