protected override ExtractedInfo ExtractFieldString(LineInfo line) { if (line.CurrentLength == 0) { if (mIsOptional) return ExtractedInfo.Empty; else throw new BadUsageException("End Of Line found processing the field: " + mFieldInfo.Name + " at line " + line.mReader.LineNumber.ToString() + ". (You need to mark it as [FieldOptional] if you want to avoid this exception)"); } ExtractedInfo res; if (line.CurrentLength < mFieldLength) if (mFixedMode == FixedMode.AllowLessChars || mFixedMode == FixedMode.AllowVariableLength) res = new ExtractedInfo(line); else throw new BadUsageException("The string '" + line.CurrentString + "' (length " + line.CurrentLength.ToString() + ") at line " + line.mReader.LineNumber.ToString() + " has less chars than the defined for " + mFieldInfo.Name + " (" + mFieldLength.ToString() + "). You can use the [FixedLengthRecord(FixedMode.AllowLessChars)] to avoid this problem."); else if (mIsLast && line.CurrentLength > mFieldLength && mFixedMode != FixedMode.AllowMoreChars && mFixedMode != FixedMode.AllowVariableLength) throw new BadUsageException("The string '" + line.CurrentString + "' (length " + line.CurrentLength.ToString() + ") at line " + line.mReader.LineNumber.ToString() + " has more chars than the defined for the last field " + mFieldInfo.Name + " (" + mFieldLength.ToString() + ").You can use the [FixedLengthRecord(FixedMode.AllowMoreChars)] to avoid this problem."); else res = new ExtractedInfo(line, line.mCurrentPos + mFieldLength); return res; }
private ExtractedInfo BasicExtractString(LineInfo line) { ExtractedInfo res; if (mIsLast) res = new ExtractedInfo(line); else { int sepPos; sepPos = line.IndexOf(mSeparator); if (sepPos == -1) { if (mNextIsOptional == false) { string msg = null; if (mIsFirst && line.EmptyFromPos()) msg = "The line " + line.mReader.LineNumber.ToString() + " is empty. Maybe you need to use the attribute [IgnoreEmptyLines] in your record class."; else msg = "The delimiter '" + mSeparator + "' can´t be found after the field '" + mFieldInfo.Name + "' at line " + line.mReader.LineNumber.ToString() + " (the record has less fields, the delimiter is wrong or the next field must be marked as optional)."; throw new FileHelpersException(msg); } else sepPos = line.mLine.Length - 1; } res = new ExtractedInfo(line, sepPos); } return res; }
internal object AssignFromString(ExtractedInfo fieldString, LineInfo line) { object val; switch (mTrimMode) { case TrimMode.None: break; case TrimMode.Both: fieldString.TrimBoth(mTrimChars); break; case TrimMode.Left: fieldString.TrimStart(mTrimChars); break; case TrimMode.Right: fieldString.TrimEnd(mTrimChars); break; } try { if (mConvertProvider == null) { if (mIsStringField) val = fieldString.ExtractedString(); else { // Trim it to use Convert.ChangeType fieldString.TrimBoth(WhitespaceChars); if (fieldString.Length == 0) { // Empty stand for null val = GetNullValue(); } else { val = Convert.ChangeType(fieldString.ExtractedString(), mFieldType, null); } } } else { if (mConvertProvider.CustomNullHandling == false && fieldString.HasOnlyThisChars(WhitespaceChars)) { val = GetNullValue(); } else { var from = fieldString.ExtractedString(); val = mConvertProvider.StringToField(from); if (val == null) val = GetNullValue(); } } return val; } catch (ConvertException ex) { var e = ConvertException.ReThrowException(ex, mFieldInfo.Name, line.mReader.LineNumber, fieldString.ExtractedFrom + 1); throw e; } }