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(Delphi DLL) Demonstrate the XML FindNextRecord MethodImagine we have an XML file as follows: <CompleteMultipartUpload> <Part> <PartNumber>1</PartNumber> <ETag>abc</ETag> </Part> <Part> <PartNumber>2</PartNumber> <ETag>def</ETag> </Part> <Part> <PartNumber>3</PartNumber> <ETag>ghi</ETag> </Part> </CompleteMultipartUpload>We want to find the record where PartNumber = 2. To do so, we simply position ourselves at the first "Part" tag, and then call FindNextRecord. (See below..)
uses Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Xml; ... procedure TForm1.Button1Click(Sender: TObject); var xml: HCkXml; foundRec: HCkXml; begin xml := CkXml_Create(); CkXml_LoadXmlFile(xml,'qa_data/xml/multipartUpload.xml'); // Position ourselves at the 1st record. CkXml_GetChild2(xml,0); foundRec := CkXml_FindNextRecord(xml,'PartNumber','2'); if (CkXml_getLastMethodSuccess(xml) = True) then begin Memo1.Lines.Add('Found the record where PartNumber = 2.'); Memo1.Lines.Add(CkXml__getXml(foundRec)); // Let's examine the ETag for this record... Memo1.Lines.Add('ETag for PartNumber 2 = ' + CkXml__getChildContent(foundRec,'ETag')); CkXml_Dispose(foundRec); end else begin Memo1.Lines.Add('No record exists where PartNumber = 2.'); end; // What if we want to find the record where ETag = "abc"? foundRec := CkXml_FindNextRecord(xml,'ETag','abc'); if (CkXml_getLastMethodSuccess(xml) = True) then begin Memo1.Lines.Add('Found the record where ETag = abc'); Memo1.Lines.Add(CkXml__getXml(foundRec)); // Let's examine the PartNumber for this record... Memo1.Lines.Add('Part number for Etag(abc) = ' + CkXml__getChildContent(foundRec,'PartNumber')); CkXml_Dispose(foundRec); end else begin Memo1.Lines.Add('No record exists where ETag = abc.'); end; // Go back to the XML root.. CkXml_GetRoot2(xml); CkXml_Dispose(xml); end; |
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