如何从代码隐藏中清除所有表单字段?

您只需要为每种类型的控件编写一个fork,除非其中一个控件有需要执行的特殊操作来重置它。

foreach( var control in this.Controls )
{
    var textbox = control as TextBox;
    if (textbox != null)
        textbox.Text = string.Empty;

    var dropDownList = control as DropDownList;
    if (dropDownList != null)
        dropDownList.SelectedIndex = 0;
    ...
}

你问过如何清除控制装置,即使是被掩埋的控制装置。为此,应创建如下递归例程:

private void ClearControl( 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;
    ...

    foreach( Control childControl in control.Controls )
    {
        ClearControl( childControl );
    }
}

因此,您可以通过传递页面来调用它:

ClearControls( this );

有关详细信息,请参阅此链接

http://www.freshcodehub.com/Article/3/clear-all-fields-like-textbox-dropdownlist-checkbox-radiobutton-label-after-form-submission-in-aspnet-c

public void ClearControls(Control parent)
{
    foreach (Control c in parent.Controls)
    {
        if ((c.GetType() == typeof(TextBox)))  //Clear TextBox
        {
            ((TextBox)(c)).Text = "";
        }
        if ((c.GetType() == typeof(DropDownList)))  //Clear DropDownList
        {
            ((DropDownList)(c)).ClearSelection();
        }
        if ((c.GetType() == typeof(CheckBox)))  //Clear CheckBox
        {
            ((CheckBox)(c)).Checked = false;
        }
        if ((c.GetType() == typeof(CheckBoxList)))  //Clear CheckBoxList
        {
            ((CheckBoxList)(c)).ClearSelection();
        }
        if ((c.GetType() == typeof(RadioButton)))  //Clear RadioButton
        {
            ((RadioButton)(c)).Checked = false;
        }
        if ((c.GetType() == typeof(RadioButtonList)))  //Clear RadioButtonList
        {
            ((RadioButtonList)(c)).ClearSelection();
        }
        if ((c.GetType() == typeof(HiddenField)))  //Clear HiddenField
        {
            ((HiddenField)(c)).Value = "";
        }
        if ((c.GetType() == typeof(Label)))  //Clear Label
        {
            ((Label)(c)).Text = "";
        }
        if (c.HasControls())
        {
            ClearControls(c);
        }
    }
}

使用手动方法 String.Empty 对于每一个文本框或任何其他字段都会很麻烦,也可以使用 Response.Redirect();

    Public void reset(Control control)
    {
      foreach (Control x in control.Controls)
      {
        if (x is TextBox)
        {
            (x as TextBox).Text = String.Empty;
        }
        else if (x is DropDownList)
        {
            (x as DropDownList).SelectedIndex = 0;
        } 
        .
        .
        reset(x);
      }
    }


          

将此代码用作 reset(this); 在您的页面中,您可以在任何地方重置或清除值。在比赛结束时 if

使用 form.Controls.Clear() 不是很好的方法,因为它会清除整个窗体,甚至会丢失窗体上的所有按钮。

相反,如果您只想清除所有表单字段(如文本字段和单选按钮),我建议您尝试以下操作: 如果你有一个重置按钮1,那么点击调用一个函数 reset();

在复位功能中:

   protected void resetButton_Click(object sender, EventArgs e)
   {
      TextBox1.Text=""; //set equal to empty string to all fields
   }

或通过终止上一页重定向到同一页

    protected void resetButton_Click(object sender, EventArgs e)
    {
        Response.Redirect("~/Test2.aspx", true);
    } 

EnableViewState=false )您希望在提交后显示为空的控件。