private CommandParameters InstanceToParameters(object instance, EntityMapping mapping)
{
CommandParameters commandParameters = new CommandParameters();
commandParameters["Id"] = mapping.IdColumn.ReaderWriter.Read(instance);
foreach (ColumnMapping columnMapping in mapping.IndexedColumns)
{
object obj = columnMapping.ReaderWriter.Read(instance);
if (obj != null && obj != DBNull.Value && (obj is string && columnMapping.MaxLength > 0))
{
int length = ((string)obj).Length;
if (length > columnMapping.MaxLength)
{
throw new StringTooLongException(string.Format("An attempt was made to store {0} characters in the {1}.{2} column, which only allows {3} characters.", length, mapping.TableName, columnMapping.ColumnName, columnMapping.MaxLength));
}
}
commandParameters[columnMapping.ColumnName] = obj;
}
return(commandParameters);
}
