C#将字符串添加到另一个字符串
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C# adding string to another string
提问by user1639776
Possible Duplicate:
What's the best string concatenation method using C#?
可能的重复：
使用 C# 的最佳字符串连接方法是什么？
I have a variable :
我有一个变量：
string variable1;
And I'm trying to make something like this :
我正在尝试做这样的事情：
for (int i = 0; i < 299; i += 2)
{
variable1 = variable1 && IntToHex(buffer[i]);
}
IntToHex is a string function, so the result of the "IntToHex(buffer[i])" will be string. But it comes up to an error saying I cannot use &&. Is there any solution to add a string to another string? Thanks!
IntToHex 是一个字符串函数，因此“IntToHex(buffer[i])”的结果将是字符串。但是出现了一个错误，说我不能使用&&。有没有办法将一个字符串添加到另一个字符串中？谢谢！
采纳答案by ChrisF
Just use the +operator:
只需使用+运算符：
variable1 = variable1 + IntToHex(buffer[i]);
You also need to initialise variable1:
您还需要初始化variable1：
string variable1 = string.Empty;
or
或者
string variable1 = null;
However consider using a StringBuilderinstead as it's more efficient:
但是考虑使用 aStringBuilder代替，因为它更有效：
StringBuilder builtString = new StringBuilder();
for (int i = 0; i < 299; i += 2)
{
builtString.Append(IntToHex(buffer[i]));
}
string variable1 = builtString.ToString();
回答by Sani Singh Huttunen
variable1 = variable1 + IntToHex(buffer[i]);
However, this is probably better:
但是，这可能更好：
var sb = new StringBuilder();
for (int i = 0; i < 299; i += 2)
{
sb.Append(IntToHex(buffer[i]));
}
variable1 = sb.ToString();
回答by Henk Holterman
In C#, simply use a +to concatenate strings:
在 C# 中，只需使用 a+来连接字符串：
variable1 = variable1 + IntToHex(buffer[i]);
But more important, this kind of situation requires a StringBuilder.
但更重要的是，这种情况需要一个StringBuilder。
var buffer = new StringBuilder();
for (int i = 0; i < 299; i += 2)
{
buffer.Append( IntToHex(buffer[i]) );
}
string variable1 = buffer.ToString();
For loops of 100 or more this really makes a big difference in performance.
对于 100 个或更多的循环，这确实会对性能产生很大的影响。
回答by lebryant
variable1 += IntToHex(buffer[i]);
回答by Mutu Yolbulan
there are various ways of adding a string to a string. you can use a simple + function which is not recommended in most cases. string.concat and string.format are preferred methods of adding strings. also stringBuilder class is useful in adding large portions of strings together
有多种方法可以将字符串添加到字符串中。您可以使用在大多数情况下不推荐的简单 + 函数。string.concat 和 string.format 是添加字符串的首选方法。stringBuilder 类也可用于将大部分字符串添加在一起
回答by Anirudha
You need to use +for concatenating strings in c#
您需要+在 c# 中用于连接字符串
for (int i = 0; i < 299; i += 2)
{
variable1 = variable1 + IntToHex(buffer[i]);
}
But StringBuilder would be a good option here...
但 StringBuilder 在这里将是一个不错的选择......
StringBuilder sb = new StringBuilder("");
for (int i = 0; i < 299; i += 2)
{
sb= sb.Append(IntToHex(buffer[i]));
}
回答by Jon Skeet
&&is the conditional-AND operator.
&&是条件与运算符。
You canuse the +operator for string concatenation, but it's not a good idea to use that within a loop (details).
您可以将+运算符用于字符串连接，但在循环(details) 中使用它不是一个好主意。
Either use a StringBuilder:
要么使用StringBuilder：
StringBuilder builder = new StringBuilder(299 * 4); // Or whatever
for (int i = 0; i < 299; i += 2)
{
builder.Append(IntToHex(buffer[i]));
}
string combined = builder.ToString();
Or potentially use string.Join- it might not be as practical in this case given your looping, but in other cases it would be great. You could still use it here, like this:
或者可能使用string.Join- 在这种情况下，考虑到您的循环，它可能不那么实用，但在其他情况下它会很棒。你仍然可以在这里使用它，就像这样：
string combined = string.Join("", Enumerable.Range(0, 149)
.Select(i => IntToHex(buffer[i * 2])));
