c# WPF TextBox 按索引检索行时的错误? [英] c# WPF TextBox bug when retrieve lines by index?
问题描述
这里有简单的 wpf 应用程序:
Simple wpf app here:
MainWindow.xaml:
MainWindow.xaml:
<Window x:Class="wpf_textbox_of.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:wpf_textbox_of"
mc:Ignorable="d"
Title="MainWindow" Height="350" Width="525">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="20"/>
<RowDefinition Height="20"/>
</Grid.RowDefinitions>
<TextBox Grid.Row="0" Margin="5" Name="txt" AcceptsReturn="True" AcceptsTab="True" />
<Button Grid.Row="1" Content="Fire 1!" Click="btn_OnClick" />
<Button Grid.Row="2" Content="Fire 2!" Click="btn2_OnClick" />
</Grid>
</Window>
MainWindow.cs(省略使用)
MainWindow.cs (omitting using)
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
private void btn_OnClick(object sender, RoutedEventArgs e)
{
var sb = new StringBuilder();
for (int i = 0; i < 90009; i++)
sb.AppendLine($"{i}");
txt.Text = sb.ToString();
}
private void btn2_OnClick(object sender, RoutedEventArgs e)
{
var sb = new StringBuilder();
for (var i = 1; i < 7; i++)
sb.AppendLine(txt.GetLineText(150 * i).Trim());
for (var i = 1; i < 7; i++)
sb.AppendLine(txt.GetLineText(15000*i).Trim());
txt.Text = sb.ToString();
}
}
跑.单击开火 1!",然后单击开火 2!".
Run. Click "Fire 1!", then "Fire 2!".
预期结果:
150 300 450 600 750 900 15000 30000 45000 60000 75000 90000
150 300 450 600 750 900 15000 30000 45000 60000 75000 90000
但获得:
150 300 450 600 750 900 15001 30002 45003 60004 75004 90005
150 300 450 600 750 900 15001 30002 45003 60004 75004 90005
在 MSVS 2017、.net 4.6.1、.net 4.6、.net 4.5.2、.net 4.5、.net 4 上检查.有什么解决方法吗?
Checked on MSVS 2017, .net 4.6.1, .net 4.6, .net 4.5.2, .net 4.5, .net 4. Any workarounds?
推荐答案
有什么解决方法吗?
Any workarounds?
您可以从 Text
属性返回的 string
中获取行:
You could get the lines from the string
returned from the Text
property:
private void btn2_OnClick(object sender, RoutedEventArgs e)
{
string[] lines = txt.Text.Split(new char[] { '\n' });
var sb = new StringBuilder();
for (var i = 1; i < 7; i++)
sb.AppendLine(lines[150 * i].Trim());
for (var i = 1; i < 7; i++)
sb.AppendLine(lines[15000 * i].Trim());
txt.Text = sb.ToString();
}
这篇关于c# WPF TextBox 按索引检索行时的错误?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!