更改应用程序中所有控件的字体大小(win窗体)

一个简单的递归函数将遍历表单中的所有控件并更改字体大小。您需要根据控件对其进行测试,并查看效果,因为在此代码中没有异常处理

public void SetAllControlsFont(ControlCollection ctrls)
{
    foreach(Control ctrl in ctrls)
    {
        if(ctrl.Controls != null)
            SetAllControlsFont(ctrl.Controls);

        ctrl.Font = new Font("Impact", ctrl.Font.Size - 4);

    }
}

您可以通过初始表单的控件集合从顶级表单调用它

SetAllControlsFont(this.Controls);

基于 Steve's 回答得好,我会做以下改进:

/// <summary>
/// Changes fonts of controls contained in font collection recursively. <br/>
/// <b>Usage:</b> <c><br/>
/// SetAllControlsFont(this.Controls, 20); // This makes fonts 20% bigger. <br/>
/// SetAllControlsFont(this.Controls, -4, false); // This makes fonts smaller by 4.</c>
/// </summary>
/// <param name="ctrls">Control collection containing controls</param>
/// <param name="amount">Amount to change: posive value makes it bigger, 
/// negative value smaller</param>
/// <param name="amountInPercent">True - grow / shrink in percent, 
/// False - grow / shrink absolute</param>
public static void SetAllControlsFontSize(
                   System.Windows.Forms.Control.ControlCollection ctrls,
                   int amount = 0, bool amountInPercent = true)
{
    if (amount == 0) return;
    foreach (Control ctrl in ctrls)
    {
        // recursive
        if (ctrl.Controls != null) SetAllControlsFontSize(ctrl.Controls,
                                                          amount, amountInPercent);
        if (ctrl != null)
        {
            var oldSize = ctrl.Font.Size;
            float newSize = 
               (amountInPercent) ? oldSize + oldSize * (amount / 100) : oldSize + amount;
            if (newSize < 4) newSize = 4; // don't allow less than 4
            var fontFamilyName = ctrl.Font.FontFamily.Name;
            ctrl.Font = new Font(fontFamilyName, newSize);
        };
    };
}

以百分比表示 例如:

SetAllControlsFont(this.Controls, 20); 

或者可以缩小字体大小

SetAllControlsFont(this.Controls, amount: -4, amountInPercent: false); 

this answer 您可以自动缩放字体 "Make everything bigger" ):

var percentage = GetWindowsScaling() - 100;
SetAllControlsFont(this.Controls, percentage); 

if (percentage > 80)  percentage = 80;
if (percentage < -20) percentage = -20;

同样,绝对值也是如此-注意,在代码中已经设置了一个限制:实际上,字体不能小于4em-这被设置为最小限制(当然,您可以根据需要进行调整)。