I posted this on my blog about resetting form fields:

A coworker and I were working on a form and found it to be quite cumbersome to do it field by field. here is some code we found that works to reset all the fields in a form. Add more types in the case statement to reset more items:

 
void resetField(object myObj)
    {
        RadioButtonList rl;
        string temp = myObj.GetType().ToString();
        switch (myObj.GetType().ToString())
        {
            case "System.Web.UI.WebControls.TextBox":
                ((TextBox)myObj).Text = "";
                break;
            case "System.Web.UI.WebControls.CheckBox":
                ((CheckBox)myObj).Checked = false;
                break;
            case "System.Web.UI.WebControls.RadioButtonList":
                rl = (RadioButtonList)myObj;
                if (rl.SelectedItem != null)
                    rl.SelectedItem.Selected = false;
                break;
            default:
                break;
        }
    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        foreach (Control wc in Page.Form.Controls)
        {
            resetField(wc);
        }
    }

 

Hi,

please can you explain me what is the advantage to use this serverside piece of code instead of using the built-in function:
<input type="reset" ...> ?

Regards
Marc Andre

Honestly, there isn't.  The input type = reset does the job nicely.  If you want to do it after you consume the values on the server, then the code sample might come in handy (since you can't call the same behaivior as the html reset through server code).  Or do you have a solution for that too?

ResetFields(Page.Controls);

this article's very good

http://imak47.wordpress.com/2008/08/01/how-to-reset-all-fields-of-a-web-form-in-asp-net/

it's possible to add other controls like:

 (...)

                case "CascadingDropDown":
                    AjaxControlToolkit.CascadingDropDown cdd = (AjaxControlToolkit.CascadingDropDown)contl;
                    cdd.SelectedValue = null;
                break;

(...)

and the function can be called like this: 

 ResetFields(Page.Controls);