private void GetCategories()
{
XmlNodeList KeysXml = this.RequestXml.SelectNodes("ISO8583Fields");
foreach (XmlNode item in KeysXml) {
XmlAttribute CategoryAttr = item.Attributes["Category"];
if (CategoryAttr != null) {
string CategoryID = CategoryAttr.Value;
List<ISO8583Field> CategoryFields = new List<ISO8583Field>();
XmlNodeList FieldsXml = item.SelectNodes("Field");
foreach (XmlNode Field in FieldsXml) {
ISO8583Field isoField = new ISO8583Field();
// Reading the required attributes.
XmlAttribute IndexAttribute = Field.Attributes["Index"];
XmlAttribute HeaderAttribute = Field.Attributes["Header"];
XmlAttribute MaxLengthAttribute = Field.Attributes["MaxLength"];
ISO8583MessageElement Index = (ISO8583MessageElement)(Convert.ToInt32(IndexAttribute.Value) - 1);
if (IndexAttribute != null && MaxLengthAttribute != null) {
isoField.FieldIndex = Index;
isoField.IsFieldEnabled = true;
string tmpFieldValue = Field.InnerXml;
if (isoField.FieldHeaderLength.Equals(0) && tmpFieldValue.Contains("|"))
tmpFieldValue = this.CheckForUserPadding(tmpFieldValue, ref isoField);
isoField.FieldValue = tmpFieldValue;
try {
Length tmp = new Length();
tmp.FieldLength = isoField.FieldLength = Convert.ToInt32(MaxLengthAttribute.Value);
tmp.HeaderLength = isoField.FieldHeaderLength =
(HeaderAttribute == null) ? 0 : Convert.ToInt32(HeaderAttribute.Value);
if (ISO8583Message.isoFieldLengths.ContainsKey(Index))
ISO8583Message.isoFieldLengths[Index] = tmp;
else
ISO8583Message.isoFieldLengths.Add(Index, tmp);
} catch (Exception) {
throw;
}
CategoryFields.Add(isoField);
} else
throw new XmlException("Invalid XML: A field in Category " + CategoryID +
" has a missing attribute, " + Index.ToString());
}
AllCategories.Add(CategoryID, CategoryFields);
} else {
throw new XmlException("Invalid XML: Invalid category provided");
}
}
}
// TODO: We should be able to ignore the '|' value escaped using '\', just like in the printf statement
private string CheckForUserPadding(string FieldValue, ref ISO8583Field _IsoField)
{
string[] tmp = FieldValue.Split('|');
if (tmp[0].Length.Equals(tmp[1].Length) && tmp[0].Length <= 1) {
if (tmp[0].Equals(tmp[1])) {
_IsoField.PaddingChar = '0';
return tmp[0];
} else
throw new XmlException(string.Format("Invalid padding info provided in field {0}, "+
"please check the input Xml", _IsoField.FieldIndex));
} else if (tmp[0].Length > tmp[1].Length && tmp[1].Length <= 1) { //implies that field should be right padded
_IsoField.PaddingPlacement = Padding.Right;
_IsoField.PaddingChar = string.IsNullOrEmpty(tmp[1]) ? ' ' : tmp[1][0];
return tmp[0];
} else {
_IsoField.PaddingPlacement = Padding.Left;
_IsoField.PaddingChar = string.IsNullOrEmpty(tmp[0]) ? ' ' : tmp[0][0];
return tmp[1];
}
}