我需要制作一个垂直和水平对齐的多线标签,我不知道怎么做!
我找到了一种使用此功能制作任何控制多线的方法:
private const int BS_MULTILINE = 0x00002000;
private const int BS_CENTER = 0x00000300;
private const int BS_VCENTER = 0x00000C00;
private const int GWL_STYLE = -16;
[DllImport("coredll")]
private static extern int GetWindowLong(IntPtr hWnd, int nIndex);
[DllImport("coredll")]
private static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);
public static void MakeControlMultiline(Control control) {
IntPtr hwnd = control.Handle;
int currentStyle = GetWindowLong(hwnd, GWL_STYLE);
int newStyle = SetWindowLong(hwnd, GWL_STYLE, currentStyle | /*BS_CENTER | BS_VCENTER | */BS_MULTILINE);
}
“BS_CENTER | BS_VCENTER”正在评论中,因为它不起作用!
所以我尝试创建一个customControl,我实现了两个对齐,如下所示:
public partial class ImproveLabel : Control {
...
protected override void OnPaint(PaintEventArgs pe) {
Graphics g = pe.Graphics;
// text
StringFormat drawFormat = new StringFormat();
drawFormat.Alignment = StringAlignment.Center;
drawFormat.LineAlignment = StringAlignment.Center;
g.DrawString(this.Text, this.Font, new SolidBrush(this.ForeColor), new Rectangle(0, 0, this.Width, this.Height), drawFormat);
// Calling the base class OnPaint
base.OnPaint(pe);
}
这里奇怪的是,如果我将两个对齐放到“中心”,多线不再起作用,但如果只有“中心”的垂直对齐和“近”的水平对齐,则多线工作
我不明白为什么它会以这种方式工作,但我需要帮助来确定如何让3个属性同时工作!
答案 0 :(得分:0)
以下代码直接来自P/Invoke SetWindowLong示例。
private const int GWL_STYLE = -16;
private const int BS_CENTER = 0x00000300;
private const int BS_VCENTER = 0x00000C00;
private const int BS_MULTILINE = 0x00002000;
public static void SetButtonStyle(Button ctrl)
{
IntPtr hWnd;
int style;
// ctrl.Capture = true;
// hWnd = GetCapture();
// ctrl.Capture = false;
// Comment below and uncomment above if using Visual Studio 2003
hWnd = ctrl.Handle;
style = GetWindowLong(hWnd, GWL_STYLE);
SetWindowLong(hWnd, GWL_STYLE, (style | BS_CENTER | BS_VCENTER | BS_MULTILINE));
ctrl.Refresh();
}
它看起来与你的完全一样,但我没有亲自测试过。