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/**
* Namespace: System.Web.UI.WebControls
* Class: RequiredFieldValidator
*
* Author: Gaurav Vaish
* Maintainer: gvaish@iitk.ac.in
* Contact: <my_scripts2001@yahoo.com>, <gvaish@iitk.ac.in>
* Implementation: yes
* Status: 100%
*
* (C) Gaurav Vaish (2002)
*/
namespace System.Web.UI.WebControls
{
[ToolboxData("<{0}:RequiredFieldValidator runat=\"server\" "
+ "ErrorMessage=\"RequiredFieldValidator\">"
+ "</{0}:RequiredFieldValidator>")]
public class RequiredFieldValidator : BaseValidator
{
public RequiredFieldValidator(): base()
{
}
public string InitialValue
{
get
{
object o = ViewState["InitialValue"];
if(o != null)
return (String)o;
return String.Empty;
}
set
{
ViewState["InitialValue"] = value;
}
}
protected override void AddAttributesToRender(HtmlTextWriter writer)
{
base.AddAttributesToRender(writer);
if(RenderUplevel)
{
writer.AddAttribute("evaluationfunction", "RequiredFieldValidatorEvaluateIsValid");
writer.AddAttribute("initialvalue", InitialValue);
}
}
protected override bool EvaluateIsValid()
{
string val = GetControlValidationValue(ControlToValidate);
if(val != null)
{
return (val.Trim() == InitialValue.Trim());
}
return true;
}
}
}
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