Question

C#WPF RichTextBox 怎么换行？

C#WPF RichTextBox 怎么换行？
\n,\r\n,NewLine都试过不行。
每次换行都换成两行。
Hello【换行】

【继续输入。。。】

Answer 1

您好，是这样的：

Private Declare Function SendMessage1 Lib "user32" Alias "SendMessageA" _
(ByVal hWnd As Long, _
ByVal wMsg As Long, _
ByVal wParam As Long, _
ByVal lParam As Long) As Long

Private Declare Function SendMessage2 Lib "user32" Alias "SendMessageA" _
(ByVal hWnd As Long, _
ByVal wMsg As Long, _
ByVal wParam As Long, _
ByVal lParam As Integer) As Long

'' ....

Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" _
(ByVal hWnd As Long, _
ByVal wMsg As Long, _
ByVal wParam As Long, _
ByVal lParam As Any) As Long
Any就是指你在调用SendMessage 函数时，lParam 参数既可以传int,也可以传long,short等等其它类型的参数
相当于你把上面的SendMessage1和SendMessage2 等等函数简化为只需要写一个SendMessage 就可以。

Answer 2

临时解决 后期根据自己的排版自己再控制其它Element

<Window x:Class="WpfApplication1.Window2"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Window2" Height="300" Width="300" Loaded="window_loaded">
    <Grid>
        <RichTextBox Name="richtextbox" />
    </Grid>
</Window>

        private void window_loaded(object sender, RoutedEventArgs e) {
            System.Windows.Documents.Paragraph p = (System.Windows.Documents.Paragraph)this.richtextbox.Document.Blocks.ElementAt(0);
            p.Margin = new Thickness(0, 0, 0, 0);

        }