如何以编程方式在C＃中创建字符串？

Question

I have a string, and I want to add a number of spaces to the beginning of that string based on an int variable.
I want to do something like this:

int NumberOfTabs = 2;
string line = "my line";
string line = String.Format("{0}{1}", "    " * NumberOfTabs, line);

...and now line would have 8 spaces

What is the easiest way to do this?

Answer 1

You can use the String(char, Int32) constructor like this:

string line = String.Format("{0}{1}", new String(' ', NumberofTabs * 4), line);

or a bit more efficient:

string line = String.Concat(new String(' ', NumberofTabs * 4), line);

or, a bit more concise :)

string line = new String(' ', NumberofTabs * 4).Concat(line);

A comment made a good point, if you want to actually have the tab character, just change the ' ' to '\\t' and take out the * 4 like this:

string line = String.Concat(new String('\t', NumberofTabs), line);

Answer 2

int i=8;
System.Text.StringBuilder sb = new System.Text.StringBuilder();
sb.Append(" ", i);

Answer 3

new string(' ', NumberOfTabs )

Answer 4

str = str.PadLeft(str.Length+tabs*4);

Answer 5

In C# strings are immutable. You should really use the stringbuilder class.

Code examples are listed in the link:

http://msdn.microsoft.com/en-us/library/system.text.stringbuilder.aspx

Answer 6

你可以使用这样的东西：

String.Empty.PadRight(NumberOfTabs)

Answer 7

You can add tabs at the beginning of your text like this:

line.PadLeft(NumberOfTabs, '\t');

\\t being the escape character for "tab" ( Inserting a tab character into text using C# )

Answer 8

int NumberOfTabs = 2;
string line = "my line";
string results = line.PadLeft(line.Length + NumberOfTabs, ' ');

Answer 9

不是任何衡量标准的最佳答案，但这是一个有趣的，一个LINQ单线程：

var result = new string(Enumerable.Repeat(' ', count).Concat("my line").ToArray());

Answer 10

You can create a new string containing a custom number of spaces. Unfortunately, there's no string multiplication like in Python ( " " * 2 ). But you can multiply the number of spaces by 4 to get "tabs":

int numberOfTabs = 2;
string line = "my line";
string whitespaces = new string(' ', numberOfTabs * 4);
string s = whitespaces + line;