WPF中RichTextBox内的光标位置
WPF中RichTextBox内的光标位置
提问于 2014-06-26 07:29:04
我正在开发一个小的WPF应用程序，其中有多个选项卡。我在底部有一个状态栏；要求显示光标的行号和列。因此，当用户更改光标位置时，行号和列必须自动更新。下面是我添加RichTextBox的代码；计算行号和列数的代码在KeyDown事件处理程序中，但是这个事件从未被调用过。我应该处理哪个事件来获取游标的行号和列？
private void AddTabitem(string filePath, mode fileMode)
{
if (fileMode == mode.openFile)
{
if (File.Exists(filePath))
{
RichTextBox mcRTB = new RichTextBox();
mcRTB.KeyDown += new KeyEventHandler(LineNumber);
//rest of the code goes here
}
}
}
mcRTB.KeyDown += new KeyEventHandler(LineNumber);
private void LineNumber(object sender, KeyEventArgs e)
{
TextPointer tp1 = rtbList[EditorTabcontrol.SelectedIndex].Selection.Start.GetLineStartPosition(0);
TextPointer tp2 = rtbList[EditorTabcontrol.SelectedIndex].Selection.Start;
int column = tp1.GetOffsetToPosition(tp2);
int someBigNumber = int.MaxValue;
int lineMoved, currentLineNumber;
rtbList[EditorTabcontrol.SelectedIndex].Selection.Start.GetLineStartPosition(-someBigNumber, out lineMoved);
currentLineNumber = -lineMoved;
string LineColumnLabel;
//LineColumnLabel.Content = "Line: " + currentLineNumber.ToString() + " Column: " + column.ToString();
LineColumnLabel = "Line: " + currentLineNumber.ToString() + " Column: " + column.ToString();
}回答 2
Stack Overflow用户
发布于 2014-06-26 08:12:21
在MSDN (http://msdn.microsoft.com/en-us/library/system.windows.controls.richtextbox.caretposition%28v=vs.110%29.aspx)上有一个你的任务的标准例子。请注意，在此上下文中，“cursor”被称为“脱字符”。来自MSDN的示例如下：
// Create a new FlowDocument, and add 3 paragraphs.
FlowDocument flowDoc = new FlowDocument();
flowDoc.Blocks.Add(new Paragraph(new Run("Paragraph 1")));
flowDoc.Blocks.Add(new Paragraph(new Run("Paragraph 2")));
flowDoc.Blocks.Add(new Paragraph(new Run("Paragraph 3")));
// Set the FlowDocument to be the content for a new RichTextBox.
RichTextBox rtb = new RichTextBox(flowDoc);
// Get the current caret position.
TextPointer caretPos = rtb.CaretPosition;
// Set the TextPointer to the end of the current document.
caretPos = caretPos.DocumentEnd;
// Specify the new caret position at the end of the current document.
rtb.CaretPosition = caretPos;Stack Overflow用户
发布于 2014-06-26 08:25:12
使用此代码查找直线和位置
WPF
"<Label x:Name="LabellineNr" Content="line#" BorderThickness="1" BorderBrush="DarkGray" />
"<Label x:Name="LabelColumnNr" Content="Column#" BorderThickness="1" BorderBrush="DarkGray"/>C#代码
private int privLineID = 1;
public int LineID
{
get { return privLineID; }
set
{
privLineID = value;
LabellineNr.Content = "Line: " + value;
}
}
private int privColumnID = 1;
public int ColumnID
{
get { return privColumnID; }
set
{
privColumnID = value;
LabelColumnNr.Content = "Column: " + value;
}
}
private int LineNumber()
{
TextPointer caretLineStart = RichTextControl.CaretPosition.GetLineStartPosition(0);
TextPointer p = RichTextControl.Document.ContentStart.GetLineStartPosition(0);
int currentLineNumber = 1;
while (true)
{
if (caretLineStart.CompareTo(p) < 0)
{
break;
}
int result;
p = p.GetLineStartPosition(1, out result);
if (result == 0)
{
break;
}
currentLineNumber++;
}
return currentLineNumber;
}
private int ColumnNumber()
{
TextPointer caretPos = RichTextControl.CaretPosition;
TextPointer p = RichTextControl.CaretPosition.GetLineStartPosition(0);
int currentColumnNumber = Math.Max(p.GetOffsetToPosition(caretPos) - 1, 0);
return currentColumnNumber;
} 页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/24420235
复制相关文章
相似问题
腾讯云开发者
