我正在WPF中编写一个文本编辑器(使用C#),它使用RichTextBox模拟聊天程序。当用户按Enter键时,相关的用户名将自动插入下一行。但是,如果用户键入足够快,在输入和其他按键之间交替,则他们的文本可以出现在生成的用户名之前。以下是可能更好地展示这一点的屏幕截图:http://oi62.tinypic.com/fusv1j.jpg
这个问题过去更糟糕了,在搜索之后我尝试在插入后手动将插入位置设置到最后;不幸的是,如果你足够快,它仍然可以在首字母之前获得文本。
以下是RichTextBox的KeyUp事件的C#以及相关的帮助方法:
private void textBoxEnterPressed(object sender, KeyEventArgs e)
{
if (e.Key != Key.Enter || initialsCheckBox.IsChecked == false)
return;
Chumhandle active = getActiveHandleBox().SelectedItem as Chumhandle;
AppendText(mainTextBox, active.Initials + ": ", active.HexCode);
TextPointer caretPos = mainTextBox.CaretPosition;
caretPos = caretPos.DocumentEnd;
mainTextBox.CaretPosition = caretPos;
}
private ComboBox getActiveHandleBox()
{
if (activeBox == 1)
return handleBox1;
else
return handleBox2;
}
public static void AppendText(RichTextBox box, string text, string color)
{
BrushConverter bc = new BrushConverter();
TextRange tr = new TextRange(box.Document.ContentEnd, box.Document.ContentEnd);
tr.Text = text;
try
{
tr.ApplyPropertyValue(TextElement.ForegroundProperty, bc.ConvertFromString(color));
}
catch (FormatException) { }
box.Selection.ApplyPropertyValue(RichTextBox.ForegroundProperty, bc.ConvertFromString(color));
}
RichTextBox的XAML:
<RichTextBox Name="mainTextBox" Grid.Row="3" FontFamily="Courier New" AcceptsReturn="True" VerticalScrollBarVisibility="Visible" BorderThickness="0" KeyUp="textBoxEnterPressed">
<RichTextBox.Resources>
<Style TargetType="{x:Type Paragraph}">
<Setter Property="Margin" Value="0" />
</Style>
</RichTextBox.Resources>
</RichTextBox>
不可否认,我不确定这是否可以解决,我应该希望用户不会那么快......
答案 0 :(得分:1)
Adriano Repetti在评论中得到了它;我不得不关闭文本框的AcceptsReturn,并自己在输入印刷机上插入新行。
你的盒子里有一场比赛。两者都想处理Enter键:你在textBoxEnterPressed和RichTextBox中添加一个新行。我将此竞赛设置为AcceptsReturn停止为False。它不应该在这里改变任何东西(除非你的对话框中有一个默认按钮),但我也将e.Handled设置为true。
答案 1 :(得分:0)
我玩了一些代码,这就是我管理的内容:
private void textBoxEnterPressed(object sender, KeyEventArgs e)
{
if (e.Key != Key.Enter)
return;
// ADDED THIS TO SIMULATE AcceptsReturn = True
if (initialsCheckBox.IsChecked == false)
{
AppendText(mainTextBox, Environment.NewLine, "#000000");
return;
}
Chumhandle active = getActiveHandleBox().SelectedItem as Chumhandle;
// ADDED Environment.NewLine TO INSERT LINE BREAKS
AppendText(mainTextBox, Environment.NewLine + active.Initials + ": ", active.HexCode);
// COMMENTED THIS BECAUSE IT WAS FORCING UNWANTED BEHAVIOR
//TextPointer caretPos = mainTextBox.CaretPosition;
//caretPos = caretPos.DocumentEnd;
//mainTextBox.CaretPosition = caretPos;
}
public static void AppendText(RichTextBox box, string text, string color)
{
BrushConverter bc = new BrushConverter();
// INSTEAD OF USING box.Document, I'VE USED box.Selection TO INSERT
// THE TEXT WHEREVER THE CURSOR IS (OR IF YOU HAVE TEXT SELECTED)
TextRange tr = new TextRange(box.Selection.Start, box.Selection.End);
tr.Text = text;
try
{
tr.ApplyPropertyValue(TextElement.ForegroundProperty, bc.ConvertFromString(color));
}
catch (FormatException) { }
// I DON'T UNDERSTAND WHAT THIS IS DOING SO I KEPT IT -_^
box.Selection.ApplyPropertyValue(RichTextBox.ForegroundProperty, bc.ConvertFromString(color));
// FINALLY, I SET THE CARET TO THE END OF THE INSERTED TEXT
box.CaretPosition = tr.End;
}