StringUtil.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / Designer / System / data / design / StringUtil.cs / 3 / StringUtil.cs
                        

                        
                             
//------------------------------------------------------------------------------
// 
//    Copyright (c) Microsoft Corporation. All Rights Reserved.
//    Information Contained Herein is Proprietary and Confidential. 
// 
//----------------------------------------------------------------------------- 
namespace System.Data.Design { 
    using System;
    using System.Diagnostics; 
    using System.Globalization;

    /// 
    /// This class stores some common used string utility functions 
    /// used by any class in this dll.
    ///  
    internal sealed class StringUtil { 

        ///  
        /// Private contstructor to avoid class being instantiated.
        /// 
        private StringUtil() {
        } 

        ///  
        ///  Checks to see if the string is empty or null 
        /// 
        ///  
        ///  true if the string is empty and not null
        /// 
        internal static bool Empty(string str) {
            return ((null == str) || (0 >= str.Length)); 
        }
 
        ///  
        ///  Checks to see if the string is empty or null or only contains spaces
        ///  
        /// 
        ///   true if the string is not empty and not null
        /// 
        internal static bool EmptyOrSpace(string str) { 
            return ((null == str) || (0 >= (str.Trim()).Length));
        } 
 
        /// 
        ///  Compare two strings with invariant culture and case sensitive 
        ///  Also consider the null cases
        /// 
        internal static bool EqualValue(string str1, string str2){
            return EqualValue(str1, str2, false); 
        }
 
         ///  
        ///  Compare two strings with invariant culture and specified case sensitivity
        ///  Also consider the null cases 
        /// 
        internal static bool EqualValue(string str1, string str2, bool caseInsensitive){
            if((str1 != null) && (str2 != null)) {
                StringComparison compararison = caseInsensitive ? StringComparison.OrdinalIgnoreCase : StringComparison.Ordinal; 
                return String.Equals(str1, str2, compararison);
            } 
            return str1 == str2; 
        }
 
        /// 
        /// We need this function as the VSDesigner.Data.DesignUtil has this one
        /// We want the change ove to be seamless.
        ///  
        internal static bool NotEmpty(string str) {
            return !Empty(str); 
        } 

        ///  
        ///      Check the string is empty or null
        /// 
        /// 
        ///       true if the string is not empty and not null 
        /// 
        public static bool NotEmptyAfterTrim(string str) { 
            return !EmptyOrSpace(str); 
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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