C# IEnumerable<Object> to string

Question

Hi,

For log purpose, I would like to call the .ToString() method of every object on an object[] array. How can I do this in the simpliest way ?

Say I have :

myArray = new Object[]{"astring",1, Customer}

Log(????);

How can I pass un string such as its value is equals to "astring".ToString()+1.ToString()+Customer.ToString()

Or better, with coma beetween each value.

Answer 1

Like this:

Log(String.Join(", ", myArray.Select(o => o.ToString()).ToArray()));

Answer 2

I regularly use...

String.Join(", ", Array.ConvertAll<object, string>(myArray, Convert.ToString))

Answer 3

MoreLINQ has a ToDelimitedString method for precisely this purpose.

It uses a StringBuilder rather than using String.Join (from what I remember from previous questions, the efficiency of the two approaches depends heavily on what the input is) but it's simple enough. Here's the core code (there are a couple of wrappers to allow a default delimiter):

private static string ToDelimitedStringImpl<TSource>
    (IEnumerable<TSource> source, string delimiter)
{
    Debug.Assert(source != null);
    Debug.Assert(delimiter != null);

    var sb = new StringBuilder();

    foreach (var value in source)
    {
        if (sb.Length > 0) sb.Append(delimiter);
        sb.Append(value);
    }

    return sb.ToString();
}

Answer 4

A simple old fashion way :

string myString = "";
foreach(Object o in myArray)
    myString += o.ToString() + ", ";
// Remove the extra comma
if(myString.Length >=2)
    myString.Remove(myString.Length - 2);