Convert a String Array to a Decimal Array using C# or VB.NET

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The Array.ConvertAll() method is a very useful method to convert an array of one type to an array of another type. Here’s how to use ConvertAll() to convert a String[] to Decimal[]

C#

static void Main(string[] args)
{
    string[] strArray = new string[] { "1164", "2213" };
    decimal d;
    decimal[] d1;
    // Check if string can be converted to decimal equivalent
    if (strArray.All(number => Decimal.TryParse(number, out d)))
    {
       d1 = Array.ConvertAll<string, decimal>(strArray, Convert.ToDecimal);
    }
}

VB.NET

Sub Main(ByVal args() As String)
    Dim strArray() As String = { "1164", "2213" }
    Dim d As Decimal
    Dim d1() As Decimal
    ' Check if string can be converted to decimal equivalent
    If strArray.All(Function(number) Decimal.TryParse(number, d)) Then
     d1 = Array.ConvertAll(Of String, Decimal)(strArray, Convert.ToDecimal)
    End If
End Sub

The first step is to use Enumerable.All(TSource) to determine whether all the elements in a sequence satisfy a condition, in our case, if all the elements of the array can be converted to its decimal equivalent. Once this can be done, we use ConvertAll() to convert an array of string to an array of decimal.

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About The Author

Suprotim Agarwal, Developer Technologies MVP (Microsoft Most Valuable Professional) is the founder and contributor for DevCurry, DotNetCurry and SQLServerCurry. He is the Chief Editor of a Developer Magazine called DNC Magazine. He has also authored two Books - 51 Recipes using jQuery with ASP.NET Controls. and The Absolutely Awesome jQuery CookBook.

Follow him on twitter @suprotimagarwal.