本文介绍了以编程方式打开 DateTimePicker C# 控件的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

如何打开 DateTimePicker 以编程方式进行 C# 控制?我想通过向控件发送键来在日期时间选择器控件中显示日历.有没有办法做到这一点?

How can I open the DateTimePicker C# control programmatically?I want to show the Calendar in the Datetime Picker control by sending keys to the control.Is there a way we can do that?

推荐答案

请尝试以下操作

//part of the usings
using System.Runtime.InteropServices;

//declares
[DllImport("user32.dll")]
private static extern bool PostMessage(
IntPtr hWnd, // handle to destination window
Int32 msg, // message
Int32 wParam, // first message parameter
Int32 lParam // second message parameter
);

const Int32 WM_LBUTTONDOWN = 0x0201;

//method to call dropdown
private void button1_Click(object sender, EventArgs e)
{
    Int32 x = dateTimePicker1.Width - 10;
    Int32 y = dateTimePicker1.Height / 2;
    Int32 lParam = x + y * 0x00010000;

    PostMessage(dateTimePicker1.Handle, WM_LBUTTONDOWN, 1,lParam);

}

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08-04 03:23
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