RangeValidator.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / UI / WebControls / RangeValidator.cs / 1 / RangeValidator.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Web.UI.WebControls { 
 
    using System.ComponentModel;
    using System.Web; 
    using System.Globalization;
    using System.Security.Permissions;
    using System.Web.Util;
 

    ///  
    ///     Checks if the value of the associated input control 
    ///       is within some minimum and maximum values, which
    ///       can be constant values or values of other controls. 
    /// 
    [
    ToolboxData("<{0}:RangeValidator runat=\"server\" ErrorMessage=\"RangeValidator\">")
    ] 
    [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)]
    [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)] 
    public class RangeValidator : BaseCompareValidator { 

 
        /// 
        ///     Gets or sets the maximum value of the validation range.
        /// 
        [ 
        WebCategory("Behavior"),
        Themeable(false), 
        DefaultValue(""), 
        WebSysDescription(SR.RangeValidator_MaximumValue)
        ] 
        public string MaximumValue {
            get {
                object o = ViewState["MaximumValue"];
                return((o == null) ? String.Empty : (string)o); 
            }
            set { 
                ViewState["MaximumValue"] = value; 
            }
        } 


        /// 
        ///     Gets or sets the minimum value of the validation range. 
        /// 
        [ 
        WebCategory("Behavior"), 
        Themeable(false),
        DefaultValue(""), 
        WebSysDescription(SR.RangeValidator_MinmumValue)
        ]
        public string MinimumValue {
            get { 
                object o = ViewState["MinimumValue"];
                return((o == null) ? String.Empty : (string)o); 
            } 
            set {
                ViewState["MinimumValue"] = value; 
            }
        }

 

        ///  
        ///  
        ///    AddAttributesToRender method
        ///  
        protected override void AddAttributesToRender(HtmlTextWriter writer) {
            base.AddAttributesToRender(writer);
            if (RenderUplevel) {
                string id = ClientID; 
                HtmlTextWriter expandoAttributeWriter = (EnableLegacyRendering) ? writer : null;
                AddExpandoAttribute(expandoAttributeWriter, id, "evaluationfunction", "RangeValidatorEvaluateIsValid", false); 
 
                string maxValueString = MaximumValue;
                string minValueString = MinimumValue; 
                if (CultureInvariantValues) {
                    maxValueString = ConvertCultureInvariantToCurrentCultureFormat(maxValueString, Type);
                    minValueString = ConvertCultureInvariantToCurrentCultureFormat(minValueString, Type);
                } 
                AddExpandoAttribute(expandoAttributeWriter, id, "maximumvalue", maxValueString);
                AddExpandoAttribute(expandoAttributeWriter, id, "minimumvalue", minValueString); 
            } 
        }
 

        /// 
        /// 
        ///    This is a check of properties to determine any errors made by the developer 
        /// 
        protected override bool ControlPropertiesValid() { 
            ValidateValues(); 
            return base.ControlPropertiesValid();
        } 


        /// 
        ///  
        ///    EvaluateIsValid method
        ///  
        protected override bool EvaluateIsValid() { 

            Debug.Assert(PropertiesValid, "Should have already been checked"); 

            // Get the peices of text from the control(s).
            string text = GetControlValidationValue(ControlToValidate);
            Debug.Assert(text != 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 (text.Trim().Length == 0) {
                return true; 
            }

            // VSWhidbey 83168
            if (Type == ValidationDataType.Date && 
                !DetermineRenderUplevel() &&
                !IsInStandardDateFormat(text)) { 
                text = ConvertToShortDateString(text); 
            }
 
            return(Compare(text, false, MinimumValue, CultureInvariantValues, ValidationCompareOperator.GreaterThanEqual, Type)
                   && Compare(text, false, MaximumValue, CultureInvariantValues, ValidationCompareOperator.LessThanEqual, Type));
        }
 
        /// 
        /// 
        ///  
        private void ValidateValues() {
            // Check the control values can be converted to data type 
            string maximumValue = MaximumValue;
            if (!CanConvert(maximumValue, Type, CultureInvariantValues)) {
                throw new HttpException(
                                       SR.GetString( 
                                                                       SR.Validator_value_bad_type,
                                                                       new string [] { 
                                                                           maximumValue, 
                                                                           "MaximumValue",
                                                                           ID, 
                                                                           PropertyConverter.EnumToString(typeof(ValidationDataType), Type)
                                                                       }));
            }
            string minumumValue = MinimumValue; 
            if (!CanConvert(minumumValue, Type, CultureInvariantValues)) {
                throw new HttpException( 
                                       SR.GetString( 
                                                                       SR.Validator_value_bad_type,
                                                                       new string [] { 
                                                                           minumumValue,
                                                                           "MinimumValue",
                                                                           ID,
                                                                           PropertyConverter.EnumToString(typeof(ValidationDataType), Type) 
                                                                       }));
            } 
            // Check for overlap. 
            if (Compare(minumumValue, CultureInvariantValues,
                        maximumValue, CultureInvariantValues, 
                        ValidationCompareOperator.GreaterThan, Type))  {
                throw new HttpException(
                                       SR.GetString(
                                                                       SR.Validator_range_overalap, 
                                                                       new string [] {
                                                                           maximumValue, 
                                                                           minumumValue, 
                                                                           ID,
                                                                       })); 
            }
        }
    }
}

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