C#如何获取窗体的最大坐标值（X值和Y值）？这一数值是窗体的宽度和高度吗？

不是。坐标值是窗体左上角顶点的坐标。

最大坐标值应该是int类型的值域最大值。但是坐标值只有在显示器的分辨率范围内时，我们才能在显示器上看到窗口，例如显示器分辨率为800*600

那么：当窗口的坐标值不在这个范围内，我们就不能看到窗口，或只能看到部分窗口。

下面这个例子主要就是通过相对坐标获得父窗口中具体位置的坐标，然后将子窗口的Loaction设置为该坐标。具体情况可根据你的需求不同来计算这个Location。这样就可以达到d出的窗口是在父窗口的左下角、右下角、左上角、右上角、中间等位置固定显示的效果。

/// <summary>

/// 设置提示窗口的显示位置

/// </summary>

/// <param name="parentForm">父类窗体</param>

private void SetFormShowPosition(Form parentForm)

{

if (m_IsUserSize == false)

{

// m_FormShowLocation为窗口显示模式，在下面有该枚举的定义。

if (m_FormShowLocation == FormShowMode.LeftBottom || m_FormShowLocation == FormShowMode.RightBottom)

{

this.Size = new Size(180, 129)

}

else

{

this.Size = new Size(280, 129)

}

}

Point showPoint = Point.Empty

int parentFormWidth = parentForm.Size.Width

int parentFormHeight = parentForm.Size.Height

int hitWidth = this.Width

int hitHeight = this.Height

if (m_FormShowLocation == FormShowMode.RightBottom || m_FormShowLocation == FormShowMode.RightBottomBig)

{

showPoint = new Point(parentFormWidth - hitWidth -18, parentFormHeight - hitHeight - System.Windows.Forms.SystemInformation.CaptionHeight - 26)

if (m_IsKeepSize)

{

showPoint = new Point(showPoint.X + 14, showPoint.Y + 21)

}

}

else if (m_FormShowLocation == FormShowMode.LeftBottom || m_FormShowLocation == FormShowMode.LeftBottomBig)

{

showPoint = new Point(9, parentFormHeight - hitHeight - System.Windows.Forms.SystemInformation.CaptionHeight - 9)

}

else if (m_FormShowLocation == FormShowMode.MiddleCenterBig)

{

showPoint = new Point((parentFormWidth - hitWidth) / 2,

(parentFormHeight - hitHeight) / 2 - System.Windows.Forms.SystemInformation.CaptionHeight - 9)

}

this.Location = parentForm.PointToScreen(showPoint)

this.Opacity = 0

if (this.Visible == false)

this.Show(parentForm)

else

this.Opacity = 1

}

/// <summary>

/// 窗体显示模式

/// </summary>

public enum FormShowMode

{

/// <summary>

/// 标准大小,左下角

/// </summary>

LeftBottom,

/// <summary>

/// 标准大小,右下角

/// </summary>

RightBottom,

/// <summary>

/// 大窗体,左下角

/// </summary>

LeftBottomBig,

/// <summary>

/// 大窗体,右下角

/// </summary>

RightBottomBig,

/// <summary>

/// 大窗体,居中

/// </summary>

MiddleCenterBig

}

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