/// <summary>Converts a string to a GUID value.</summary>
/// <param name="text">String text to convert.</param>
/// <param name="targetValue">After invocation, converted value.</param>
/// <returns>true if the value was converted; false otherwise.</returns>
private static bool TryKeyStringToGuid(string text, out Guid targetValue)
{
if (!DomainDataServiceQueryStringConverter.TryRemoveLiteralPrefix(TypeUtils.LiteralPrefixGuid, ref text))
{
targetValue = default(Guid);
return(false);
}
if (!DomainDataServiceQueryStringConverter.TryRemoveQuotes(ref text))
{
targetValue = default(Guid);
return(false);
}
try
{
targetValue = XmlConvert.ToGuid(text);
return(true);
}
catch (FormatException)
{
targetValue = default(Guid);
return(false);
}
}
/// <summary>Converts a string to a DateTime value.</summary>
/// <param name="text">String text to convert.</param>
/// <param name="targetValue">After invocation, converted value.</param>
/// <returns>true if the value was converted; false otherwise.</returns>
private static bool TryKeyStringToDateTime(string text, out DateTime targetValue)
{
if (!DomainDataServiceQueryStringConverter.TryRemoveLiteralPrefix(TypeUtils.LiteralPrefixDateTime, ref text))
{
targetValue = default(DateTime);
return(false);
}
if (!DomainDataServiceQueryStringConverter.TryRemoveQuotes(ref text))
{
targetValue = default(DateTime);
return(false);
}
try
{
targetValue = XmlConvert.ToDateTime(text, XmlDateTimeSerializationMode.RoundtripKind);
return(true);
}
catch (FormatException)
{
targetValue = default(DateTime);
return(false);
}
}
/// <summary>Converts a string to a byte[] value.</summary>
/// <param name="text">String text to convert.</param>
/// <param name="targetValue">After invocation, converted value.</param>
/// <returns>true if the value was converted; false otherwise.</returns>
private static bool TryKeyStringToByteArray(string text, out byte[] targetValue)
{
Debug.Assert(text != null, "text != null");
if (!DomainDataServiceQueryStringConverter.TryRemoveLiteralPrefix(TypeUtils.LiteralPrefixBinary, ref text) &&
!DomainDataServiceQueryStringConverter.TryRemoveLiteralPrefix(TypeUtils.XmlBinaryPrefix, ref text))
{
targetValue = null;
return(false);
}
if (!DomainDataServiceQueryStringConverter.TryRemoveQuotes(ref text))
{
targetValue = null;
return(false);
}
if ((text.Length % 2) != 0)
{
targetValue = null;
return(false);
}
byte[] result = new byte[text.Length / 2];
int resultIndex = 0;
int textIndex = 0;
while (resultIndex < result.Length)
{
char ch0 = text[textIndex];
char ch1 = text[textIndex + 1];
if (!DomainDataServiceQueryStringConverter.IsCharHexDigit(ch0) ||
!DomainDataServiceQueryStringConverter.IsCharHexDigit(ch1))
{
targetValue = null;
return(false);
}
result[resultIndex] = (byte)((byte)(DomainDataServiceQueryStringConverter.HexCharToNibble(ch0) << 4) +
DomainDataServiceQueryStringConverter.HexCharToNibble(ch1));
textIndex += 2;
resultIndex++;
}
targetValue = result;
return(true);
}