Question

This is .NET 2.0 project. First of all the xml i what to parse:

<?xml version="1.0" standalone="yes"?>
<DocumentElement>
  <diagramer>
    <PKTABLE_NAME>TECH_Y_Category</PKTABLE_NAME>
    <FKTABLE_NAME>TECH_File</FKTABLE_NAME>
  </diagramer>
  <diagramer>
    <PKTABLE_NAME>TECH_File</PKTABLE_NAME>
    <FKTABLE_NAME>TECH_Version</FKTABLE_NAME>
  </diagramer>
  <diagramer>
    <PKTABLE_NAME>TECH_Group</PKTABLE_NAME>
    <FKTABLE_NAME>TECH_D_Group_File_Version</FKTABLE_NAME>
  </diagramer>
  <diagramer>
    <PKTABLE_NAME>TECH_Layout</PKTABLE_NAME>
    <FKTABLE_NAME>TECH_File</FKTABLE_NAME>
  </diagramer>
  <diagramer>
    <PKTABLE_NAME>CK_List</PKTABLE_NAME>
    <FKTABLE_NAME>CK_Vote</FKTABLE_NAME>
  </diagramer>
  <diagramer>
    <PKTABLE_NAME>CK_List</PKTABLE_NAME>
    <FKTABLE_NAME>CK_Score</FKTABLE_NAME>
  </diagramer>
  <diagramer>
    <PKTABLE_NAME>TECH_Page</PKTABLE_NAME>
    <FKTABLE_NAME>TECH_Page</FKTABLE_NAME>
  </diagramer>
  <diagramer>
    <PKTABLE_NAME>CK_List</PKTABLE_NAME>
    <FKTABLE_NAME>Comments</FKTABLE_NAME>
  </diagramer>
</DocumentElement>

As you can see some PKTABLE_NAME values are the same.
Im looping through that xml using code below:

StringBuilder sb = new StringBuilder();
foreach (XmlNode items in diagramTables)
{
  string pkTable = items["PKTABLE_NAME"].InnerText.Replace("_",@"\_");
  string fkTable = items["FKTABLE_NAME"].InnerText.Replace("_",@"\_");

  sb.Append(pkTable);
  sb.Append(" got ");
  sb.Append( fkTable + Environment.NewLine);

}

Its not exaclly what i want to achive. I want to have all values but only once (i dont want to repeat them). after all i want to write sometingingh like this from xml above:

• TECH_Y_Category got
  TECH_File
• TECH_File got TECH_Version
• TECH_Group got TECH_D_Group_File_Version
• TECH_Layout got TECH_File
• CK_List got CK_Vote | CK_Score | Comments
• TECH_Page got TECH_Page

I hope you understand what im trying to achieve.

EDIT.

Code from Morawski worked perfectly for me so problem is solved ;).

Answer 1

Something like:

Dictionary<string, List<string>> dict = new Dictionary<string, List<string>>();
foreach (XmlNode items in diagramTables)
{
  string pkTable = items["PKTABLE_NAME"].InnerText.Replace("_",@"\_");
  string fkTable = items["FKTABLE_NAME"].InnerText.Replace("_",@"\_");
  if (!dict.ContainsKey(pkTable))
  {
    dict.Add(pkTable, new List<string>());
  }
  if (!dict[pkTable].Contains(fkTable))
  {
      dict[pkTable].Add(fkTable);
  }
}
sb.Append("========================================================="); // making it easier for you
foreach(KeyValuePair<string, List<string>> kvp in dict)
{
  sb.Append(kvp.Key);
  sb.Append(" got ");
  sb.AppendLine(String.Join("|", kvp.Value.ToArray()));
}
sb.Append("========================================================="); // making it easier for you