Builds a string representation for IEnumerable - CSharp System.Collections

CSharp examples for System.Collections:IEnumerable

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Description

Builds a string representation for IEnumerable

Demo Code


using System.Text;
using System.Collections.Generic;
using System.Collections;
using System;/*from  w ww.jav  a  2  s .  c  o m*/

public class Main{
        /// <summary>
      /// Builds a string reprensentation for a <paramref name="collection"/>
      /// </summary>
      /// <param name="collection"></param>
      /// <param name="seperator">the string used to seperate strings of different items</param>
      /// <returns>returns <see cref="String.Empty"/> if the <paramref name="collection"/> is empty.</returns>
      /// <remarks>
      /// Note that item with an empty ToString() won't show up in this representation.
      /// To control this behavior use <see cref="ToString(IEnumerable , string , string , string ) "/>
      /// </remarks>
      public static string ToString(IEnumerable collection, string seperator) {
         return ToString(collection, seperator, string.Empty);
      }
        /// <summary>
      /// Builds a string reprensentation for a <paramref name="collection"/>
      /// </summary>
      /// <param name="collection"></param>
      /// <param name="seperator">the string used to seperate strings of different items</param>
      /// <param name="emptyText">the string to be return if the <paramref name="collection"/> is empty</param>
      /// <param name="nullText">the string to use when the item is null or its ToString() returns an empty string</param>
      /// <returns></returns>
      public static string ToString(IEnumerable collection, string seperator, string emptyText, string nullText) {
         StringBuilder sb = new StringBuilder();
         foreach (object o in collection) {
            string s = string.Empty;
            if (o != null) s = o.ToString();
            if (string.IsNullOrEmpty(s)) s = nullText;
            if (!string.IsNullOrEmpty(s)) sb.Append(s + seperator);
         }
         if (sb.Length > 0) {
            sb.Remove(sb.Length - seperator.Length, seperator.Length);
            return sb.ToString();
         }
         else
            return emptyText;
      }
        /// <summary>
      /// Builds a string reprensentation for a <paramref name="collection"/>
      /// </summary>
      /// <param name="collection"></param>
      /// <param name="seperator">the string used to seperate strings of different items</param>
      /// <param name="emptyText">the string to be return if the <paramref name="collection"/> is empty</param>
      /// <returns></returns>
      /// <remarks>
      /// Note that null tiems and items with an empty ToString() won't show up in this representation
      /// To control this behavior use <see cref="ToString(IEnumerable , string , string , string ) "/>
      /// </remarks>
      public static string ToString(IEnumerable collection, string seperator, string emptyText) {
         return ToString(collection, seperator, emptyText, string.Empty);
      }
}

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