{"id":2540,"date":"2023-07-03T07:22:29","date_gmt":"2023-07-03T00:22:29","guid":{"rendered":"https:\/\/csharptutorial.net\/?page_id=2540"},"modified":"2023-07-03T07:23:23","modified_gmt":"2023-07-03T00:23:23","slug":"csharp-string-trimstart","status":"publish","type":"page","link":"https:\/\/www.csharptutorial.net\/csharp-string-methods\/csharp-string-trimstart\/","title":{"rendered":"C# String TrimStart"},"content":{"rendered":"\n

Summary<\/strong>: in this tutorial, you will learn how to use the C# String TrimStart()<\/code> method to remove all the leading white-space characters from a string.<\/p>\n\n\n\n

Introduction to the C# String TrimStart() method<\/h2>\n\n\n\n

The String<\/a> TrimStart()<\/code> method allows you to remove all the leading white-space characters from a string. It returns a new string with the leading white spaces removed.<\/p>\n\n\n\n

Here’s the syntax of the TrimStart()<\/code> method:<\/p>\n\n\n

public<\/span> string<\/span> TrimStart<\/span>(<\/span>)<\/span>;<\/code><\/span>Code language:<\/span> C#<\/span> (<\/span>cs<\/span>)<\/span><\/small><\/pre>\n\n\n
The following example shows how to use the TrimStart()<\/code> method to remove the leading white spaces from the string \" Hello, World!\"<\/code>;<\/p>\n\n\n
using<\/span> static<\/span> System.Console;\n\nvar<\/span> message = \" Hello, World!\"<\/span>;\nvar<\/span> trimmed = message.TrimStart();\n\nWriteLine(message);\nWriteLine(trimmed);<\/code><\/span>Code language:<\/span> C#<\/span> (<\/span>cs<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
 Hello, World!\nHello, World!<\/code><\/span>Code language:<\/span> C#<\/span> (<\/span>cs<\/span>)<\/span><\/small><\/pre>\n\n\n
In this example, the message<\/code> string contains leading white spaces. We call the TrimStart()<\/code> method on the message<\/code> string. The method returns a result string (trimmed<\/code>) that has the leading white spaces removed.<\/p>\n\n\n\n
Note that the TrimStart()<\/code> method doesn’t change the original string but returns a new string.<\/p>\n\n\n\n
The Unicode standard defines white-space characters. The TrimStart()<\/code> method removes any leading and trailing characters that, when passed to the Char.IsWhiteSpace<\/code>() method, returns true<\/code>:<\/p>\n\n\n
public<\/span> static<\/span> bool<\/span> IsWhiteSpace<\/span> (char<\/span> c<\/span>)<\/span>;<\/code><\/span>Code language:<\/span> C#<\/span> (<\/span>cs<\/span>)<\/span><\/small><\/pre>\n\n\n
Using C# String TrimStart() to remove the leading instances of a character<\/h2>\n\n\n\n
The String TrimStart()<\/code> method has an overload that allows you to remove the leading instances of a character from the current string:<\/p>\n\n\n
public<\/span> string<\/span> TrimStart<\/span>(char<\/span> trimChar<\/span>)<\/span>;<\/code><\/span>Code language:<\/span> C#<\/span> (<\/span>cs<\/span>)<\/span><\/small><\/pre>\n\n\n
In this syntax, the trimChar<\/code> is a character to remove. The TrimStart()<\/code> method returns a new string with the all the leading trimChar<\/code> removed.<\/p>\n\n\n\n
For example, the following program uses the TrimStart()<\/code> method to remove the leading  (\/<\/code>) from a string:<\/p>\n\n\n
using<\/span> static<\/span> System.Console;\n\nvar<\/span> comment = \"\/\/This is a in C#\"<\/span>;\nvar<\/span> result = comment.TrimStart('\/'<\/span>);\n\nWriteLine(comment);\nWriteLine(result);<\/code><\/span>Code language:<\/span> C#<\/span> (<\/span>cs<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
\/\/This is a comment in C#<\/span>\nThis is<\/span> a comment in<\/span> C#<\/span><\/code><\/span>Code language:<\/span> C#<\/span> (<\/span>cs<\/span>)<\/span><\/small><\/pre>\n\n\n
Using C# String TrimStart() to remove the leading occurrences of a set of characters<\/h2>\n\n\n\n
The String TrimStart()<\/code> method has an overload that removes any leading and trailing instances of specified characters from the current string:<\/p>\n\n\n
public<\/span> string<\/span> TrimStart<\/span> (\n   params<\/span> char<\/span>[]? trimChars\n<\/span>)<\/span>;<\/code><\/span>Code language:<\/span> C#<\/span> (<\/span>cs<\/span>)<\/span><\/small><\/pre>\n\n\n
In this syntax, the trimChars<\/code> is an array<\/a> of characters<\/a> to remove. Note that if the trimChars<\/code> is null<\/code>, the TrimStart()<\/code> method returns a new string with the leading white spaces removed.<\/p>\n\n\n\n
The following example uses the TrimStart()<\/code> method to remove the leading characters \/<\/code> and spaces from a string:<\/p>\n\n\n
using<\/span> static<\/span> System.Console;\n\nvar<\/span> comment = \"\/\/ This is a comment in C#\"<\/span>;\nchar<\/span>[] trimChars = { '\/'<\/span>, ' '<\/span> };\nvar<\/span> result = comment.TrimStart(trimChars);\n\nWriteLine(comment);\nWriteLine(result);<\/code><\/span>Code language:<\/span> C#<\/span> (<\/span>cs<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
\/\/ This is a comment in C#<\/span>\nThis is<\/span> a comment in<\/span> C#<\/span><\/code><\/span>Code language:<\/span> C#<\/span> (<\/span>cs<\/span>)<\/span><\/small><\/pre>\n\n\n
Summary<\/h2>\n\n\n\n
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  • Use the C# String TrimStart()<\/code> method to remove all the leading white spaces or a set of specified characters from a string.<\/li>\n<\/ul>\n
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