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//------------------------------------------------------------------------------
// <copyright file="CompareValidator.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
namespace System.Web.UI.WebControls {
using System.ComponentModel;
using System.Web;
using System.Globalization;
using System.Web.Util;
/// <devdoc>
/// <para> Compares the value of an input control to another input control or
/// a constant value using a variety of operators and types.</para>
/// </devdoc>
[
ToolboxData("<{0}:CompareValidator runat=\"server\" ErrorMessage=\"CompareValidator\"></{0}:CompareValidator>")
]
public class CompareValidator : BaseCompareValidator {
/// <devdoc>
/// <para>Gets or sets the ID of the input control to compare with.</para>
/// </devdoc>
[
WebCategory("Behavior"),
Themeable(false),
DefaultValue(""),
WebSysDescription(SR.CompareValidator_ControlToCompare),
TypeConverter(typeof(ValidatedControlConverter))
]
public string ControlToCompare {
get {
object o = ViewState["ControlToCompare"];
return((o == null) ? String.Empty : (string)o);
}
set {
ViewState["ControlToCompare"] = value;
}
}
/// <devdoc>
/// <para>Gets or sets the comparison operation to perform.</para>
/// </devdoc>
[
WebCategory("Behavior"),
Themeable(false),
DefaultValue(ValidationCompareOperator.Equal),
WebSysDescription(SR.CompareValidator_Operator)
]
public ValidationCompareOperator Operator {
get {
object o = ViewState["Operator"];
return((o == null) ? ValidationCompareOperator.Equal : (ValidationCompareOperator)o);
}
set {
if (value < ValidationCompareOperator.Equal || value > ValidationCompareOperator.DataTypeCheck) {
throw new ArgumentOutOfRangeException("value");
}
ViewState["Operator"] = value;
}
}
/// <devdoc>
/// <para>Gets or sets the specific value to compare with.</para>
/// </devdoc>
[
WebCategory("Behavior"),
Themeable(false),
DefaultValue(""),
WebSysDescription(SR.CompareValidator_ValueToCompare)
]
public string ValueToCompare {
get {
object o = ViewState["ValueToCompare"];
return((o == null) ? String.Empty : (string)o);
}
set {
ViewState["ValueToCompare"] = value;
}
}
// <summary>
// AddAttributesToRender method
// </summary>
/// <internalonly/>
/// <devdoc>
/// <para>Adds the attributes of this control to the output stream for rendering on the
/// client.</para>
/// </devdoc>
protected override void AddAttributesToRender(HtmlTextWriter writer) {
base.AddAttributesToRender(writer);
if (RenderUplevel) {
string id = ClientID;
HtmlTextWriter expandoAttributeWriter = (EnableLegacyRendering || IsUnobtrusive) ? writer : null;
AddExpandoAttribute(expandoAttributeWriter, id, "evaluationfunction", "CompareValidatorEvaluateIsValid", false);
if (ControlToCompare.Length > 0) {
string controlToCompareID = GetControlRenderID(ControlToCompare);
AddExpandoAttribute(expandoAttributeWriter, id, "controltocompare", controlToCompareID);
AddExpandoAttribute(expandoAttributeWriter, id, "controlhookup", controlToCompareID);
}
if (ValueToCompare.Length > 0) {
string valueToCompareString = ValueToCompare;
if (CultureInvariantValues) {
valueToCompareString = ConvertCultureInvariantToCurrentCultureFormat(valueToCompareString, Type);
}
AddExpandoAttribute(expandoAttributeWriter, id, "valuetocompare", valueToCompareString);
}
if (Operator != ValidationCompareOperator.Equal) {
AddExpandoAttribute(expandoAttributeWriter, id, "operator", PropertyConverter.EnumToString(typeof(ValidationCompareOperator), Operator), false);
}
}
}
/// <internalonly/>
/// <devdoc>
/// <para> Checks the properties of a the control for valid values.</para>
/// </devdoc>
protected override bool ControlPropertiesValid() {
// Check the control id references
if (ControlToCompare.Length > 0) {
CheckControlValidationProperty(ControlToCompare, "ControlToCompare");
if (StringUtil.EqualsIgnoreCase(ControlToValidate, ControlToCompare)) {
throw new HttpException(SR.GetString(SR.Validator_bad_compare_control,
ID,
ControlToCompare));
}
}
else {
// Check Values
if (Operator != ValidationCompareOperator.DataTypeCheck &&
!CanConvert(ValueToCompare, Type, CultureInvariantValues)) {
throw new HttpException(
SR.GetString(SR.Validator_value_bad_type,
new string [] {
ValueToCompare,
"ValueToCompare",
ID,
PropertyConverter.EnumToString(typeof(ValidationDataType), Type),
}));
}
}
return base.ControlPropertiesValid();
}
/// <internalonly/>
/// <devdoc>
/// EvaluateIsValid method
/// </devdoc>
protected override bool EvaluateIsValid() {
Debug.Assert(PropertiesValid, "Properties should have already been checked");
// Get the peices of text from the control.
string leftText = GetControlValidationValue(ControlToValidate);
Debug.Assert(leftText != null, "Should have already caught this!");
// Special case: if the string is blank, we don't try to validate it. The input should be
// trimmed for coordination with the RequiredFieldValidator.
if (leftText.Trim().Length == 0) {
return true;
}
// VSWhidbey 83168
bool convertDate = (Type == ValidationDataType.Date && !DetermineRenderUplevel());
if (convertDate && !IsInStandardDateFormat(leftText)) {
leftText = ConvertToShortDateString(leftText);
}
// The control has precedence over the fixed value
bool isCultureInvariantValue = false;
string rightText = string.Empty;
if (ControlToCompare.Length > 0) {
rightText = GetControlValidationValue(ControlToCompare);
Debug.Assert(rightText != null, "Should have already caught this!");
// VSWhidbey 83089
if (convertDate && !IsInStandardDateFormat(rightText)) {
rightText = ConvertToShortDateString(rightText);
}
}
else {
rightText = ValueToCompare;
isCultureInvariantValue = CultureInvariantValues;
}
return Compare(leftText, false, rightText, isCultureInvariantValue, Operator, Type);
}
}
}
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