如何选择多行文本框的文本顺序？ [英] How can I select the text order of a multiline textbox?

问题描述

我有一个多行文本框，它接收来自不同类的值，我希望每行都添加在顶部而不是底部，我该怎么做？



我有一个计时器，每秒向列表添加一个日期和一个随机数。它被分析，并有一个文本框，说明是保留还是删除。







在我检查我的值的类中：

public string Log {get;组; }

Log + =example 1;

Log + =example 2;

Log + =example 3; < br $> b $ b





在MainWindowXAML.cs中我有：

textbox.Text = classinstance.Log;



我进入文本框：

示例1

示例2

示例3



我想要

示例3

示例2

示例1

I have a multiline textbox that receives values from a different class, and I want that every line is added on top instead of the bottom, how can I do that?

I have a timer that adds a date and a random number to a list every second. It is analysed and there is a textbox that says if that point is keep or deleted.



In a Class where i check the values I have :
public string Log { get; set; }
Log + = "example 1";
Log + = "example 2";
Log + = "example 3";



In the MainWindowXAML.cs i have:
textbox.Text = classinstance.Log;

And I get in the textbox:
"example 1
example 2
example 3"

And I want
"example 3
example 2
example 1"

推荐答案

明显的解决方案是在类中以正确的顺序添加它们;-p


但是，您可以使用字符串的 Insert 方法，例如

Well the obvious solution would be to add them in the correct order within the class ;-p

However, you can use the Insert method of a string e.g.

Log = "example 1" + "\r\n";
Log = Log.Insert(0, "example 2" + "\r\n");
Log = Log.Insert(0, "example 3" + "\r\n");

我也有责任指出你不应该使用<字符串上的code> + = - 它们是不可变的，因此每次实际创建一个新字符串。更好的是使用 StringBuilder

I also feel duty-bound to point out that you shouldn't use += on strings - they are immutable so you are actually creating a new string each time. Better is to use StringBuilder

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