清除页面的所有内容 [英] Clearing all the feilds of a page

问题描述

大家好！

我想清除页面上文本框中的所有值.我使用了以下代码.它既不起作用，也不给我任何错误.


clear(Page);

Hi all!!

I want to clear all the values from the textbox on my page. I used the following code. neither it''s working nor it''s giving me any error.


clear(Page);

private void clear( Control c)
   {
       foreach ( Control ctrl in c.Controls )
       {
           if (ctrl is TextBox)
           {
               TextBox tb = ctrl as TextBox;
               tb.Text = "";
           }
           else
           if (ctrl is DropDownList)
           {
               DropDownList ddl = ctrl as DropDownList;
               ddl.SelectedIndex=0;
           }
           else
               if (ctrl is CheckBox)
               {
                   CheckBox chk = ctrl as CheckBox;
                   chk.Checked = false;
               }

       }
   }

推荐答案

尝试以下代码:

Try this code:

private void Clear(Control parent)
       {
           foreach (Control c in parent.Controls)
           {
               if (c.Controls.Count > 0)
               {
                   Clear(c);
               }
               else
               {
                   switch (c.GetType().ToString())
                   {
                       case "System.Web.UI.WebControls.TextBox":
                           ((TextBox)c).Text = "";
                           break;
                       case "System.Web.UI.WebControls.CheckBox":
                           ((CheckBox)c).Checked = false;
                           break;
                       case "System.Web.UI.WebControls.RadioButton":
                           ((RadioButton)c).Checked = false;
                           break;

                   }
               }
           }
       }

并这样称呼:

and call it like this:

Clear(this);

希望对您有所帮助:)

hope it helps :)

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