如何替换字符串中的文本 [英] How to replace text in a string

问题描述

这是我的代码，我想以最简单的方式将"here"一词替换为"potato".

This is my code, I want to replace the word "here" with "potato" in the simplest way.

Private Sub btnreplace_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)      Handles btnreplace.Click
    txttyping.Text.Replace("here", "potato")
End Sub

推荐答案

字符串(文本)是不可变的.这意味着它们不能直接更改，只能更改一个新字符串已创建/返回.

Strings (text) are immutable. This means they cannot be changed directly, to alter one, a new string is created/returned.

txttyping.Text = txttyping.Text.Replace("here", "potato)

Replace()返回需要分配的新字符串.更改字符串的 all String 方法都是这样: ToLower()， ToUpper()， Remove()，PadLeft()， Copy()， Remove()， TrimEnd().

Replace() returns a new string which needs to be assigned. This is true for all the String methods which change the string: ToLower(), ToUpper(), Remove(), PadLeft(), Copy(), Remove(), TrimEnd().

请参见 MSDN字符串类:

一个String对象被称为不可变的(只读)，因为它的值在创建后就无法修改.看来可以修改String对象的方法实际上会返回一个包含修改的新String对象.

A String object is called immutable (read-only), because its value cannot be modified after it has been created. Methods that appear to modify a String object actually return a new String object that contains the modification.

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