如何检查RichTextBox中是否已启动新行 [英] How to check if a new line has started in a RichTextBox

问题描述

我在使用多个richTextBox的表单时遇到问题。

I'm having an issue with a form that I have made where I use multiple richTextBoxes.

我的问题是，如果有人在字段中输入并到达边缘正如您所期望的那样，它移动到一个新行的richtextbox，然而当我在打印机上打印该表单时，它不会将文本移动到新行，而是继续从页面上继续所有
的方式。

My problem is that if someone types in the fields and reaches the edge of the richtextbox it moves to a new line, as you would expect, however when I then print the form out on a printer it does not move the text to a new line and instead continues all the way off the page.

我已经实现了代码，用于检查字符串数组中是否存在'\ n'，如果有，则将下一个字符串移动到新行，但我认为当用户到达文本框的边缘时，它不会将"\ n"添加到字符串数组中，而是将
只是以图形方式将文本移动到新行。

I have implemented code that checks if there is a '\n' in the string array and if there is then move the next string to a new line but I think that when the user reaches the edge of the text box it is not adding the '\n' to the string array and is instead just moving the text to a new line graphically.

这是我的代码，用于检查字符串数组中是否有'\ n'。

Here is my code that checks if there is a '\n' in the string array.

  char [] param = {' \ n'};

 char[] param = { '\n' };

foreach（字符串s in richTextBox3.Text.Split（param））

                {

                    e.Graphics.DrawString（s，richTextBox3.Font，newB，50，y3）;

                    y3 + =（f.Height + 3）;

                }

foreach (string s in richTextBox3.Text.Split(param))
                {
                    e.Graphics.DrawString(s, richTextBox3.Font, newB, 50, y3);
                    y3 += (f.Height + 3);
                }

如果用户手动点击回车键移动到richTextBox中的新行，则没有问题。只有当richTextBox自动移动到新行时才会检测到新行。

If the user manually hits the enter key to move to a new line in the richTextBox there isn't a problem. It's only when the richTextBox automatically moves to a new line that when printed it doesn't detect a new line.

推荐答案

试试这个例子：

Try this example:

string text = richTextBox3.Text;
var lines = new List<string>();
int p = 0;
for( int i = 1; ; ++i )
{
   int f = richTextBox3.GetFirstCharIndexFromLine( i );
   if( f < 0 )
   {
      lines.Add( text.Substring( p ) );
      break;
   }

   lines.Add( text.Substring( p, f - p ) );

   p = f;
}

检查行数组。

您还可以禁用包装并引入滚动条;然后用户将使用< Enter>手动分隔线。

You can also disable the wrapping and introduce scrollbars; then the users will break the lines manually using <Enter>.

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