Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>An attempt of my own. Uses the MSXML 6.0 type library. Not too fancy, but seems to do the job.</p> <pre><code>unit ttreexml; // treeview to XML, XML to treeview by Glenn1234, // may be used with proper credit given interface uses msxml2_tlb, comctrls, dialogs, sysutils; type // saves TTreeView as XML file. TTreeViewToXML = class private doc: IXMLDOMDocument; FTree: TTreeView; procedure XMLPopulate(BaseNode: TTreeNode; DataItem: IXMLDOMelement); Public Constructor Create(Tree: TTreeView); procedure SaveToFile(filename: string); end; // loads TTreeView from XML file TXMLToTreeView = class private doc: IXMLDOMDocument; FTree: TTreeView; procedure XMLLoad(BaseItem: TTreeNode; DataItem: IXMLDOMNode); Public Procedure XMLToTree(Tree: TTreeView; Const FileName: String); end; implementation constructor TTreeViewToXML.Create(Tree: TTreeView); begin FTree := Tree; end; procedure TTreeViewToXML.XMLPopulate(BaseNode: TTreeNode; DataItem: IXMLDOMelement); var SubItem: IXMLDOMElement; selnode: TTreeNode; begin SelNode := BaseNode; while selnode &lt;&gt; nil do begin if SelNode.HasChildren then begin SubItem := doc.CreateElement('Group'); SubItem.setAttribute('Value', SelNode.Text); DataItem.AppendChild(SubItem); XMLPopulate(SelNode.GetFirstChild, SubItem); end else begin SubItem := doc.CreateElement('Item'); SubItem.setAttribute('Value', SelNode.Text); DataItem.AppendChild(SubItem); end; SelNode := SelNode.GetNextChild(SelNode); end; end; procedure TTreeViewToXML.SaveToFile(filename: string); var topnode: IXMLDOMElement; selnode: TTreeNode; begin //create DOM document instance doc := CoDOMDocument.Create; doc.async := false; //------------------------------------------------------------------------------ topnode := doc.createElement('TreeView'); doc.appendChild(topnode); selnode := FTree.Items.GetFirstNode; XMLPopulate(SelNode, topnode); doc.save(FileName); end; procedure TXMLToTreeView.XMLLoad(BaseItem: TTreeNode; DataItem: IXMLDOMNode); var item1, item2: IXMLDOMNode; attr: IXMLDOMNamedNodeMap; CurrItem: TTreeNode; begin Item1 := DataItem; CurrItem := nil; // compiler complains if I don't do this while Item1 &lt;&gt; nil do begin attr := item1.attributes; item2 := attr.nextNode; while item2 &lt;&gt; nil do begin CurrItem := FTree.Items.AddChild(BaseItem, Item2.NodeValue); item2 := attr.nextNode; end; if item1.nodename = 'Group' then XMLLoad(CurrItem, Item1.Get_firstChild); Item1 := Item1.Get_nextSibling; end; end; Procedure TXMLToTreeView.XMLToTree(Tree: TTreeView; Const FileName: String); var item1: IXMLDOMNode; begin //create DOM document instance doc := CoDOMDocument.Create; doc.async := false; FTree := Tree; //------------------------------------------------------------------------------ if doc.load(FileName) then begin FTree.Items.BeginUpdate; FTree.Items.Clear; Item1 := doc.documentElement.Get_firstChild; XMLLoad(nil, Item1); FTree.Items.EndUpdate; end else begin MessageDlg(Format ('Error loading XML document.'#13 + 'Error number: %d'#13 + 'Reason: %s'#13 + 'Line: %d'#13 + 'Column: %d', [doc.parseError.errorCode, doc.parseError.reason, doc.parseError.line, doc.parseError.linePos]), mtError, [mbOK], 0); end; end; end. </code></pre> <p>Quick sample XML output:</p> <pre><code>- &lt;Group Value="Delphi 3"&gt; - &lt;Group Value="BIN"&gt; &lt;Item Value="BOWF520.DLL" /&gt; &lt;Item Value="BOWFVC.DLL" /&gt; &lt;Item Value="BRC32.EXE" /&gt; &lt;Item Value="BRCC32.EXE" /&gt; . . . &lt;Item Value="DELPHI32.EXE" /&gt; &lt;Item Value="DELPHIMM.DLL" /&gt; . . . &lt;/Group&gt; &lt;Item Value="DeIsL1.isu" /&gt; - &lt;Group Value="Demos"&gt; - &lt;Group Value="ACTIVEX"&gt; - &lt;Group Value="DELCTRLS"&gt; &lt;Item Value="ABOUT1.DFM" /&gt; </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POSaving and Loading Treeview using XML
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USGlenn1234
    1. USGlenn1234
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload