C# - String.Join method that ignores empty strings?

C# - String.Join method that ignores empty strings?

In C#, if you want to use String.Join but ignore empty strings, you can filter out the empty strings before using the String.Join method. Here's an example:

using System; class Program { static void Main() { // Sample array of strings with empty strings string[] stringArray = { "Hello", "", "World", "", "!" }; // Use String.Join with string filtering string result = JoinWithoutEmptyStrings(stringArray, ","); // Display the result Console.WriteLine(result); } static string JoinWithoutEmptyStrings(string[] array, string separator) { // Filter out empty strings string[] nonEmptyStrings = Array.FindAll(array, s => !string.IsNullOrEmpty(s)); // Use String.Join to concatenate non-empty strings return string.Join(separator, nonEmptyStrings); } }

In this example:

  • The JoinWithoutEmptyStrings method takes an array of strings and a separator.
  • It uses Array.FindAll to filter out empty strings from the array.
  • Then, it uses String.Join to concatenate the non-empty strings with the specified separator.

Adjust the method based on your specific needs or use it directly in your code.

Examples

  1. "C# String.Join Ignore Empty Strings"

    • Description: How to use String.Join in C# to concatenate non-empty strings.
    string[] parts = { "One", "", "Two", "", "Three" }; string result = string.Join(", ", parts.Where(s => !string.IsNullOrEmpty(s)));

  2. "C# String.Join Ignore Null or Empty"

    • Description: Ignores both null and empty strings in the String.Join operation.
    string[] values = { "Apple", null, "", "Orange", "", "Banana" }; string result = string.Join(", ", values.Where(s => !string.IsNullOrEmpty(s)));

  3. "C# String.Join Exclude Empty Strings"

    • Description: Excludes empty strings from the result of String.Join in C#.
    string[] items = { "A", "", "B", "", "C" }; string result = string.Join(", ", items.Where(s => !string.IsNullOrEmpty(s)));

  4. "C# String.Join Without Empty Strings"

    • Description: Demonstrates how to create a custom String.Join method that excludes empty strings.
    string[] words = { "Hello", "", "World", "", "!" }; string result = JoinWithoutEmpty(", ", words); 
    static string JoinWithoutEmpty(string separator, IEnumerable<string> values) { return string.Join(separator, values.Where(s => !string.IsNullOrEmpty(s))); }

  5. "C# String.Join Ignore Whitespace Strings"

    • Description: Excludes strings containing only whitespace characters in the String.Join operation.
    string[] items = { "A", " ", "B", " ", "C" }; string result = string.Join(", ", items.Where(s => !string.IsNullOrWhiteSpace(s)));

  6. "C# String.Join Ignore Empty Elements"

    • Description: Ignores empty elements while using String.Join with a delimiter.
    List<string> elements = new List<string> { "One", "", "Two", "", "Three" }; string result = string.Join(", ", elements.Where(e => !string.IsNullOrEmpty(e)));

  7. "C# String.Join Exclude Null Strings"

    • Description: Excludes null strings from the result of String.Join in C#.
    string[] items = { "Apple", null, "Orange", null, "Banana" }; string result = string.Join(", ", items.Where(s => s != null));

  8. "C# String.Join Without Null or Empty"

    • Description: Creates a custom String.Join method that excludes both null and empty strings.
    string[] values = { "A", null, "", "B", "", "C" }; string result = JoinWithoutNullOrEmpty(", ", values); 
    static string JoinWithoutNullOrEmpty(string separator, IEnumerable<string> values) { return string.Join(separator, values.Where(s => !string.IsNullOrEmpty(s))); }

  9. "C# String.Join Exclude Empty Values"

    • Description: Excludes empty values while using String.Join with a delimiter.
    List<string> values = new List<string> { "Apple", "", "Orange", "", "Banana" }; string result = string.Join(", ", values.Where(v => !string.IsNullOrEmpty(v)));

  10. "C# String.Join Without Null or Whitespace"

    • Description: Excludes both null and whitespace strings in the result of String.Join.
    string[] items = { "A", null, " ", "B", " ", "C" }; string result = string.Join(", ", items.Where(s => !string.IsNullOrWhiteSpace(s)));

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