/// <summary>
/// Creates an object of type <typeparamref name="T"/> based on a <see cref="DataRow"/>.
/// The fields of the <see cref="DataRow"/> can be either of the corresponding type, or of the
/// <see cref="String"/> type. In the case of a <see cref="String"/>, conversion will be done using
/// the <see cref="PIn"/> data class.
/// </summary>
/// <param name="row">
/// A <see cref="DataRow"/> containing rows corresponding to objects of type <typeparamref name="T"/>.
/// </param>
/// <returns>
/// An objects of type <typeparamref name="T"/>.
/// </returns>
/// <remarks>
/// <para>
/// This method is for compatibility purposes only.
/// </para>
/// <para>
/// This method needs to be tested.
/// </para>
/// </remarks>
public static T CreateObject(DataRow row)
{
if (row == null)
{
throw new ArgumentNullException("row");
}
Collection <T> values = new Collection <T>();
Collection <DataFieldInfo> dataFields = DataObjectInfo <T> .GetDataFields();
T value = new T();
foreach (DataFieldInfo dataField in dataFields)
{
if (dataField.WriteOnly)
{
continue;
}
// Retrieve the value and its type, both in the database and code.
object dataValue = row[dataField.DatabaseName];
Type dataType = row.Table.Columns[dataField.DatabaseName].DataType;
Type codeType = dataField.Field.FieldType;
if (codeType != typeof(string) && dataType == typeof(string))
{
// If the type in the dataset is "string", but the type in the code
// object isn't "string", we use the PIn class.
if (dataType == typeof(Bitmap))
{
dataValue = PIn.PBitmap((string)dataValue);
}
else if (dataType == typeof(bool))
{
dataValue = PIn.PBool((string)dataValue);
}
else if (dataType == typeof(Byte))
{
dataValue = PIn.PByte((string)dataValue);
}
else if (dataType == typeof(DateTime))
{
// NOTE: Is there any difference between PIn.PDate and PIn.PDateT?
dataValue = PIn.PDate((string)dataValue);
}
else if (dataType == typeof(double))
{
dataValue = PIn.PDouble((string)dataValue);
}
else if (dataType == typeof(float))
{
dataValue = PIn.PFloat((string)dataValue);
}
else if (dataType == typeof(int))
{
dataValue = PIn.PInt((string)dataValue);
}
else
{
// NOTE: Support for "Sound" is not here yet. Maybe it should be exported
// to a byte[] type and then saved, don't know.
throw new NotSupportedException(Resources.DataTypeNotSupportedByPIn);
}
}
else
{
// The object is stored in it's "true" type in the DataSet as well (no conversions to
// string types have been done). We can, normally, directly use it, except for a couple
// of special cases.
if (codeType == typeof(bool))
{
// Booleans are sometimes stored as TINYINT(3), to enable conversion to
// Enums if required. Hence, we need to do an explicit conversion.
dataField.Field.SetValue(value, Convert.ToBoolean(dataValue));
}
else if (codeType == typeof(DateTime))
{
// DateTime fields can have various minimum or default values depending on
// the database type. In MySql, for example, it is 00-00-00, which is not supported
// by .NET. So for now, we catch a cast exception and set it to DateTime.MinValue.
try {
dataField.Field.SetValue(value, DateTime.Parse(dataValue.ToString()));
}
catch {
dataField.Field.SetValue(value, DateTime.MinValue);
}
}
else
{
dataField.Field.SetValue(value, dataValue);
}
}
}
return(value);
}
