重置组框内成员的方法

本文关键字：成员 方法 | 更新日期: 2023-09-27 17:51:07

是否有方法清除groupBox内所有对象的属性?例如，清除所有文本框，取消选中所有复选框等，并将其设置为默认值。或者我应该一个一个地编码来清除它们?我想这样做的事件listview SelectedIndexChanged。

更新:

ok，谢谢重播，我发现你可以在组框内选择控件非常简单。

        foreach (Control ctrl in groupBox2.Controls)//this will only select controls of groupbox2
        {
            if (ctrl is TextBox)
            {
                (ctrl as TextBox).Text = "";
            }
            if (ctrl is CheckBox)
            {
                (ctrl as CheckBox).Checked = false;
            }
            if (ctrl is ComboBox)
            {
                (ctrl as ComboBox).SelectedIndex = -1;
            }
            //etc
        }

重置组框内成员的方法

最快的方法是:

Control myForm = Page.FindControl("Form1");
foreach (Control ctrl in myForm.Controls)
{
    //Clears TextBox
    if (ctrl is System.Web.UI.WebControls.TextBox)
    {
        (ctrl as TextBox).Text = "";
    }
    //Clears DropDown Selection
    if (ctrl is System.Web.UI.WebControls.DropDownList)
    {
         (ctrl as DropDownList).ClearSelection();
    }
    //Clears ListBox Selection
    if (ctrl is System.Web.UI.WebControls.ListBox)
    {
        (ctrl as ListBox).ClearSelection();
    }
    //Clears CheckBox Selection
    if (ctrl is System.Web.UI.WebControls.CheckBox)
    {
        (ctrl as CheckBox).Checked = false;
    }
    //Clears RadioButton Selection
    if (ctrl is System.Web.UI.WebControls.RadioButtonList)
    {
        (ctrl as RadioButtonList).ClearSelection();
    }
    //Clears CheckBox Selection
    if (ctrl is System.Web.UI.WebControls.CheckBoxList)
    {
        (ctrl as CheckBoxList).ClearSelection();
    }
}

您需要逐个清除组框内的所有控件

您必须创建这样的函数:

private void ClearControls(Control control)
{
    var textbox = control as TextBox;
    if (textbox != null)
        textbox.Text = string.Empty;
    var dropDownList = control as DropDownList;
    if (dropDownList != null)
        dropDownList.SelectedIndex = 0;
    // And add any other controls
    // ...
    foreach( Control childControl in control.Controls )
    {
        ClearControl( childControl );
    }
}

就像这样命名:

ClearControls(this);

这将递归地工作，所以如果你有任何面板，例如，有自己的一组控件要清除，这将清除那些。

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