blocks|key|3323009|text|strObject.ToUpper()返回大写的string|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3323010|使用以下代码...|3323011|strObject+=+strObject.ToUpper().Trim();|code-block|syntax|javascript|3323012|entityMap^0|0|J|O|6|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|T|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|U|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|N|$]]

<code>strObject.ToUpper()</code> returns a <code>string</code> in upper case

Use the following ...

<pre><code>strObject = strObject.ToUpper().Trim();
</code></pre>

blocks|key|1851795|text|System.String是不可变的，所以你必须重新赋值，比如：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1851796|strObject+=+strObject.ToUpper().Trim();+|code-block|syntax|javascript|1851797|所有操作字符串的方法都会保留原始字符串不变，并返回包含所需内容的新字符串。您必须获取该返回值，并将其赋给某个值。|BOLD|1851798|entityMap^0|0|D|0|0|W|1|0^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|S|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|T|8|@$9|U|A|V|B|M]]|D|@]|E|$]]|$1|N|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|O|$]]

A <code>System.String</code> is immutable, so you must re-assign, like:

<pre><code>strObject = strObject.ToUpper().Trim(); 
</code></pre>

All methods that manipulate strings, leave the original string unchanged and returns a new string with the desired content. You must pick up that return value and assign it to something.

blocks|key|1598117|text|string.ToUpper()返回一个值，请使用它。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1598118|entityMap^0|0|G|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

<code>string.ToUpper()</code> returns a value, use it.

blocks|key|1851852|text|字符串是不可变的，因此调用字符串上的函数实际上不会更改字符串。相反，它们返回一个修改后的字符串副本。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1851853|这意味着你必须存储函数的返回值，例如在原始变量中。|1851854|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Strings are immutable, so calling the functions on the string doesn't actually change the strings. Instead they return a modified copy of the strings.

This means that you have to store the returned value of the functions, fore example in the original variable.

blocks|key|3323168|text|这是行不通的，因为字符串是不可变的，您必须将值赋回到strObject|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3323169|strObject+=+strObject.ToUpper().Trim();|code-block|syntax|javascript|3323170|此外，正如您的代码中所示，switch并没有做太多的事情，您可以删除它，除非这不是整个代码。|3323171|public+void+VerifyValue(String+strObject,+String+strValue,+int+row)
{+++++++++++++++
+++++//strObject.ToUpper().Trim();
+++++//strValue.ToUpper().Trim();
+++++if(strObject.ToUpper()+==++"TASK_STATUS")
+++++{
++++++++++if+(m_taskStatus.taskStatus.ToString()+==+strValue.ToUpper())
++++++++++{
++++++++++++++ExcelRecorder(null,+row);
++++++++++}
++++++++++else
++++++++++{
+++++++++++++++ExcelRecorder("The+value+["+%2B+m_taskStatus.taskStatus.ToString()+%2B+"]+does+not+match+with+the+given+value.",+row);
+++++++++++}
+++++++}
}|3323172|entityMap^0|Q|9|0|0|D|6|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|M|3|N|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|Y|8|@]|D|@]|E|$]]]|P|$]]

This won't work since strings are immutable, you have to assign the value back to <code>strObject</code> 

<pre><code>strObject = strObject.ToUpper().Trim();
</code></pre>

Also there is nothing much done by the <code>switch</code> as shown in your code, you can remove it unless this is not the entire code.

<pre><code>public void VerifyValue(String strObject, String strValue, int row)
{ 
 //strObject.ToUpper().Trim();
 //strValue.ToUpper().Trim();
 if(strObject.ToUpper() == "TASK_STATUS")
 {
 if (m_taskStatus.taskStatus.ToString() == strValue.ToUpper())
 {
 ExcelRecorder(null, row);
 }
 else
 {
 ExcelRecorder("The value [" + m_taskStatus.taskStatus.ToString() + "] does not match with the given value.", row);
 }
 }
}
</code></pre>

blocks|key|3234670|text|字符串是不可变的，当你使用它们时，你需要记住这一点。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3234671|您的方法将值插入到您调用各种worker方法的strObject和strValue变量中，但这些worker方法不会更改已经创建的不可变字符串变量。|3234672|尽管原始变量是不可变的，但您仍然可以将新变量(即使具有相同的名称)设置为等于原始变量加上worker方法的结果。|3234673|所以你真正需要做的就是改变|3234674|strObject.ToUpper().Trim();|offset|length|style|CODE|3234675|和|3234676|strValue.ToUpper().Trim();|3234677|​|3234678|至|3234679|strObject+=+strObject.ToUpper().Trim()|3234680|3234681|strValue+=+strvalue.ToUpper().Trim()|3234682|这个答案几乎是我的答案here的副本，但我认为两者都是正确的。|3234683|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/11583601/datetime-adddays-not-working-as-expected/52719465#52719465^0|0|0|0|0|0|R|0|0|0|Q|0|0|0|0|12|0|0|0|10|0|B|4|0|0^^$0|@$1|2|3|4|5|6|7|1A|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1B|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|1C|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|1D|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|1E|8|@$J|1F|K|1G|L|M]]|9|@]|A|$]]|$1|N|3|O|5|6|7|1H|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|1I|8|@$J|1J|K|1K|L|M]]|9|@]|A|$]]|$1|R|3|S|5|6|7|1L|8|@]|9|@]|A|$]]|$1|T|3|U|5|6|7|1M|8|@]|9|@]|A|$]]|$1|V|3|W|5|6|7|1N|8|@$J|1O|K|1P|L|M]]|9|@]|A|$]]|$1|X|3|O|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|Y|3|Z|5|6|7|1R|8|@$J|1S|K|1T|L|M]]|9|@]|A|$]]|$1|10|3|11|5|6|7|1U|8|@]|9|@$J|1V|K|1W|1|1X]]|A|$]]|$1|12|3|-4|5|6|7|1Y|8|@]|9|@]|A|$]]]|13|$14|$5|15|16|17|A|$18|19]]]]

<h1>Strings are immutable, you need to remember that when you work with them.</h1>

Your method inserts values to your strObject and strValue variables to which you call various worker methods but those worker methods do not change the immutable string variables that have already been created.

Although the original variables are immutable you can still set new variables (Even with the same name) equal to the original plus the result of the worker method.

So all you really need to do is to change 

<code>strObject.ToUpper().Trim();</code>

and 

<code>strValue.ToUpper().Trim();</code>



to 

<code>strObject = strObject.ToUpper().Trim()</code>

and 

<code>strValue = strvalue.ToUpper().Trim()</code>

This answer is pretty much a duplicate of my answer <a href="https://stackoverflow.com/questions/11583601/datetime-adddays-not-working-as-expected/52719465#52719465">here</a> but I think both are correct.

I am passing a message from a server that gets stored into a string variable called strObject. I wish to convert the string inside strObject to upper case. So, I use ToUpper() method. But, when I add a breakpoint and go through the line, my string is not getting converted into Upper case. strObject variable will always contain the text Task_status. I wish to convert it into TASK_STATUS. Am I missing anything? Posting my relevant code below:-

<pre><code>public void VerifyValue(String strObject, String strValue, int row)
 { 
 strObject.ToUpper().Trim();
 strValue.ToUpper().Trim();
 switch (strObject)
 {
 case "TASK_STATUS":
 if (m_taskStatus.taskStatus.ToString() == strValue)
 {
 ExcelRecorder(null, row);
 }
 else
 {
 ExcelRecorder("The value [" + m_taskStatus.taskStatus.ToString() + "] does not match with the given value.", row);
 }
 }
 }
</code></pre>

ToUpper() method not working

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我正在从服务器传递一条消息，该消息被存储到一个名为strObject的字符串变量中。我希望将strObject中的字符串转换为大写。因此，我使用ToUpper()方法。但是，当我添加断点并遍历该行时，我的字符串不会转换为大写。strObject变量将始终包含文本Task_status。我希望将其转换为TASK_STATUS。我错过了什么吗？在下面发布我的相关代码：public void Verif

问ToUpper()方法不起作用
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问ToUpper()方法不起作用
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