How to join an array of strings but first remove the elements of the array that are empty in C#?

How to join an array of strings but first remove the elements of the array that are empty in C#?

To join an array of strings in C# while removing the empty elements, you can use the string.Join method in combination with LINQ's Where method.

Here's an example:

string[] arr = { "foo", "", "bar", "", "baz" };
string result = string.Join(",", arr.Where(s => !string.IsNullOrEmpty(s)));

In this example, we have an array of strings called arr, which contains some empty elements. We use the Where method to filter out the empty elements by checking if they are not null or empty using the string.IsNullOrEmpty method. Then, we use the string.Join method to concatenate the non-empty elements into a single string separated by commas.

The resulting string will be "foo,bar,baz", which contains only the non-empty elements from the original array.

Examples

  1. C# - Joining an Array of Strings and Removing Empty Elements

    Description: This query is about joining an array of strings in C# and removing empty elements before the join.

    // Join array of strings and remove empty elements
string[] stringArray = { "Hello", "", "World", "", "!" };
string result = string.Join(" ", stringArray.Where(str => !string.IsNullOrEmpty(str)));

  2. C# - Join Array of Strings with Non-Empty Check

    Description: This query seeks information on joining an array of strings while checking for non-empty elements.

    // Join array of strings with non-empty check
string[] stringArray = { "Apple", "", "Banana", "", "Cherry" };
string result = string.Join(" ", stringArray.Where(str => str.Length > 0));

  3. C# - Join Array of Strings and Exclude Empty Entries

    Description: This query is interested in joining an array of strings and excluding empty entries during the join.

    // Join array of strings and exclude empty entries
string[] stringArray = { "C#", "", "Programming", "", "Language" };
string result = string.Join(" ", stringArray.Where(str => !string.IsNullOrWhiteSpace(str)));

  4. C# - Join Array of Strings with Empty Removal

    Description: This query looks for information on joining an array of strings in C# and removing empty elements.

    // Join array of strings with empty removal
string[] stringArray = { "C#", "", "Arrays", "", "Join" };
string result = string.Join(" ", stringArray.Where(str => !string.IsNullOrEmpty(str.Trim())));

  5. C# - Join Array of Strings Excluding Null or Empty

    Description: This query is about joining an array of strings in C# and excluding both null and empty elements.

    // Join array of strings excluding null or empty
string[] stringArray = { "Code", "", "Efficiently", "", null };
string result = string.Join(" ", stringArray.Where(str => !string.IsNullOrEmpty(str)));

  6. C# - Join Array of Strings and Trim Empty Elements

    Description: This query seeks information on joining an array of strings in C# and trimming empty elements before the join.

    // Join array of strings and trim empty elements
string[] stringArray = { "C#", "", "String", "", "Manipulation" };
string result = string.Join(" ", stringArray.Select(str => str.Trim()).Where(str => !string.IsNullOrEmpty(str)));

  7. C# - Join Array of Strings with Empty Check

    Description: This query is interested in joining an array of strings in C# with an explicit check for empty elements.

    // Join array of strings with empty check
string[] stringArray = { "Join", "", "Array", "", "C#" };
string result = string.Join(" ", stringArray.Where(str => !string.IsNullOrEmpty(str)));

  8. C# - Join Array of Strings with RemoveEmptyEntries

    Description: This query looks for information on joining an array of strings in C# and using RemoveEmptyEntries option.

    // Join array of strings with RemoveEmptyEntries
string[] stringArray = { "Remove", "", "EmptyEntries", "", "Option" };
string result = string.Join(" ", stringArray.Where(str => !string.IsNullOrEmpty(str)).ToArray());

  9. C# - Join Array of Strings and Exclude Whitespace Entries

    Description: This query is about joining an array of strings in C# and excluding both empty and whitespace elements.

    // Join array of strings and exclude whitespace entries
string[] stringArray = { "C#", "", "Whitespace", "  ", "Removal" };
string result = string.Join(" ", stringArray.Where(str => !string.IsNullOrWhiteSpace(str)));

  10. C# - Join Array of Strings with Empty Element Removal

    Description: This query seeks information on joining an array of strings in C# and removing elements that are empty.

    // Join array of strings with empty element removal
string[] stringArray = { "Keep", "", "Non-Empty", "", "Elements" };
string result = string.Join(" ", stringArray.Where(str => !string.IsNullOrEmpty(str)));

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