The CultureInfo class will not help you in either parsing or formatting the numbers to eastern Arabic ("?", "?", "?", "?", "?", "?", "?", "?", "?", "?") nor to western Arabic ("0", "1", "2", "3", "4", "5", "6", "7", "8", "9"). You have to manually convert it, Here is a little function which will do that for you in a neat way:
public string ConvertToEasternArabicNumerals(string input)
{
System.Text.UTF8Encoding utf8Encoder = new UTF8Encoding();
System.Text.Decoder utf8Decoder = utf8Encoder.GetDecoder();
System.Text.StringBuilder convertedChars = new System.Text.StringBuilder();
char[] convertedChar = new char[1];
byte[] bytes = new byte[] { 217, 160 };
char[] inputCharArray = input.ToCharArray();
foreach (char c in inputCharArray)
{
if (char.IsDigit(c))
{
bytes[1] = Convert.ToByte(160 + char.GetNumericValue(c));
utf8Decoder.GetChars(bytes, 0, 2, convertedChar, 0);
convertedChars.Append(convertedChar[0]);
}
else
{
convertedChars.Append(c);
}
}
return convertedChars.ToString();
}
Now alter your code a little to look like this:
string sDate
DateTime dtt = Convert.ToDateTime("19/01/2012");
CultureInfo ci = new CultureInfo("ar-SA");
sDate = ConvertToEasternArabicNumerals(dtt.ToString("dd/MM/yyyy", ci));
And things will work just fine.
BTW, the code for the function was taken from here.
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