我们如何清除winform上的所有形式控件？ [英] how can we clear the all form controls on winform?

问题描述

我想清除所有控件特别是textbox nad组合框。
和我使用以下控件清除所有字段。

I want to clear all controls specially textbox nad combobox. and I am using the following control to clear all fields.

private void ResetFields()
    {
        foreach (Control ctrl in this.Controls)
        {
            if (ctrl is TextBox)
            {
                TextBox tb = (TextBox)ctrl;
                if (tb != null)
                {
                    tb.Text = string.Empty;
                }
            }
            else if (ctrl is ComboBox)
            {
                ComboBox dd = (ComboBox)ctrl;
                if (dd != null)
                {
                    dd.Text = string.Empty;
                    dd.SelectedIndex = -1;
                }
            }
        }
    } 

以上代码在组框中无法正常工作。在组框中我有组合框和文本框。组合框显示组框的所选索引= 1。我也想要清除这些控件。
任何建议

The above code is not working properly in group box. In group box I have combo box and text box as well. Combo box shows the selected index = 1 of the group box. I also want to clear these controls as well. Any suggestions ????

推荐答案

TextBox 和 ComboBox

    public static void ClearSpace(Control control)
    {
        foreach (Control c in control.Controls)
        {
            var textBox = c as TextBox;
            var comboBox = c as ComboBox;

            if (textBox != null)
                (textBox).Clear();

            if (comboBox != null)
                comboBox.SelectedIndex = -1;

            if (c.HasChildren)
                ClearSpace(c);
        }
    }

用法： p>

Usage:

        ClearSpace(this); //Control

这篇关于我们如何清除winform上的所有形式控件？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！