foreach (System.Windows.Forms.Control control in this.Controls)
{
if (control is System.Windows.Forms.TextBox)
{
System.Windows.Forms.TextBox tb = (System.Windows.Forms.TextBox)control ;
tb.Text = String.Empty ; }
}
请编程遍历WinForm页面上所有TextBox控件并给它赋值为string.Empty？
原文：https://www.cnblogs.com/knandnk/p/14240471.html