在RichTextBox C#WPF中设置卡雷特位置
我有一个在RichTextBox C#WPF中设置卡雷特位置,c#,wpf,richtextbox,rtf,C#,Wpf,Richtextbox,Rtf,我有一个RichTextBox和Name=Editor!以及以下代码: String textRich = new TextRange(Editor.Document.ContentStart, Editor.Document.ContentEnd).Text; EditorColor ec = new EditorColor(textRich);//Transform The text in RTF Text Stream stream = new MemorySt
RichTextBox
和Name=Editor
!以及以下代码:
String textRich = new TextRange(Editor.Document.ContentStart, Editor.Document.ContentEnd).Text;
EditorColor ec = new EditorColor(textRich);//Transform The text in RTF Text
Stream stream = new MemoryStream(ASCIIEncoding.Default.GetBytes(ec.SetText())); //SetText Function return a RTF text
Editor.Selection.Select(Editor.Document.ContentStart, Editor.Document.ContentEnd);
Editor.Document.Blocks.Clear();
Editor.Selection.Load(stream, DataFormats.Rtf);//Change the text with the RTF Text
Editor.CaretPosition = ????
我想将Editor.CaretPosition
设置为我选择并更改文本之前的状态?在这里不起作用:
TextPointer carret = Editor.CaretPosition;
do above code ......
Editor.CaretPosition = carret; // it sets the carret at end of Richtextbox
那么如何做到这一点呢?如果您的纯文本被转换为格式化文本,那么这应该是可行的:
// Save the current position
int caretIntPosition = GetIntPosition(Editor.CaretPosition, Editor);
// Do your work ...
// Restore the position
SetIntPosition(caretIntPosition, Editor);
/// <summary>
/// Converts a TextPointer position into an int position.
/// </summary>
int GetIntPosition(TextPointer pointerPosition, RichTextBox rtb)
{
int intPosition = 0;
TextPointer currentPosition = rtb.Document.ContentStart;
while (currentPosition.CompareTo(pointerPosition) != 0)
{
intPosition++;
currentPosition = currentPosition.GetNextInsertionPosition(LogicalDirection.Forward);
}
return intPosition;
}
/// <summary>
/// Converts an int position back into a TextPointer position and places the caret there.
/// </summary>
void SetIntPosition(int intPosition, RichTextBox rtb)
{
TextPointer currentPosition = rtb.Document.ContentStart;
for (int i = 1; i <= intPosition; i++)
{
currentPosition = currentPosition.GetNextInsertionPosition(LogicalDirection.Forward);
}
rtb.CaretPosition = currentPosition;
}
//保存当前位置
int caretIntPosition=GetIntPosition(Editor.CaretPosition,Editor);
//做你的工作。。。
//复职
SetIntPosition(caretIntPosition,编辑器);
///
///将文本指针位置转换为int位置。
///
int GetIntPosition(文本指针指针位置,RichTextBox rtb)
{
int位置=0;
text指针currentPosition=rtb.Document.ContentStart;
while(currentPosition.CompareTo(pointerPosition)!=0)
{
intPosition++;
currentPosition=currentPosition.GetNextInsertionPosition(LogicalDirection.Forward);
}
返回位置;
}
///
///将int位置转换回TextPointer位置,并将插入符号放在该位置。
///
void SetIntPosition(int intPosition,RichTextBox rtb)
{
text指针currentPosition=rtb.Document.ContentStart;
对于(int i=1;i,如果将纯文本转换为格式化文本,则此操作应有效:
// Save the current position
int caretIntPosition = GetIntPosition(Editor.CaretPosition, Editor);
// Do your work ...
// Restore the position
SetIntPosition(caretIntPosition, Editor);
/// <summary>
/// Converts a TextPointer position into an int position.
/// </summary>
int GetIntPosition(TextPointer pointerPosition, RichTextBox rtb)
{
int intPosition = 0;
TextPointer currentPosition = rtb.Document.ContentStart;
while (currentPosition.CompareTo(pointerPosition) != 0)
{
intPosition++;
currentPosition = currentPosition.GetNextInsertionPosition(LogicalDirection.Forward);
}
return intPosition;
}
/// <summary>
/// Converts an int position back into a TextPointer position and places the caret there.
/// </summary>
void SetIntPosition(int intPosition, RichTextBox rtb)
{
TextPointer currentPosition = rtb.Document.ContentStart;
for (int i = 1; i <= intPosition; i++)
{
currentPosition = currentPosition.GetNextInsertionPosition(LogicalDirection.Forward);
}
rtb.CaretPosition = currentPosition;
}
//保存当前位置
int caretIntPosition=GetIntPosition(Editor.CaretPosition,Editor);
//做你的工作。。。
//复职
SetIntPosition(caretIntPosition,编辑器);
///
///将文本指针位置转换为int位置。
///
int GetIntPosition(文本指针指针位置,RichTextBox rtb)
{
int位置=0;
text指针currentPosition=rtb.Document.ContentStart;
while(currentPosition.CompareTo(pointerPosition)!=0)
{
intPosition++;
currentPosition=currentPosition.GetNextInsertionPosition(LogicalDirection.Forward);
}
返回位置;
}
///
///将int位置转换回TextPointer位置,并将插入符号放在该位置。
///
void SetIntPosition(int intPosition,RichTextBox rtb)
{
text指针currentPosition=rtb.Document.ContentStart;
对于(int i=1;i TextPointer是一种引用类型,因此当您更改CaretPosition时,youtcarret
变量也会更改。您需要复制,而不是引用。TextPointer是一种引用类型,因此当您更改CaretPosition时,youtcarret
变量也会更改。您需要复制,而不是引用。请查看我更改的ans请看我修改过的答案。