如何将滚动条向上移动一行? (在C#RichTextBox中) [英] How to move scroll bar up by one line? (In C# RichTextBox)

问题描述

对于我的C#RichTextBox，我要以编程方式执行与单击垂直滚动条顶部的向上箭头相同的操作，这会将RichTextBox显示上移一行.这是什么代码?谢谢！

For my C# RichTextBox, I want to programmatically do the same thing as clicking the up arrow at the top of a vertical scroll bar, which moves the RichTextBox display up by one line. What is the code for this? Thanks!

推荐答案

这就是我要做的事情:

using System.Runtime.InteropServices;

[DllImport("user32.dll")]
static extern int SendMessage(IntPtr hWnd, uint wMsg, 
                               UIntPtr wParam, IntPtr lParam);

然后致电:

SendMessage(myRichTextBox.Handle, (uint)0x00B6, (UIntPtr)0, (IntPtr)(-1));

似乎可以正常工作-不过，您可能需要进行一些调整.

Seems to work OK - you might need to tweak things a bit, though.

希望有帮助.

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