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Thread: QDomDocumen save method doesn't work!

  1. #1
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    Smile QDomDocumen save method doesn't work!

    i want to create a file and write some xml code in it use the below code like this ,but it don't save anything ,anyone could help me
    Qt Code:
    1. QString xmlAddress=projectAddress;
    2. xmlAddress+="//";
    3. xmlAddress+=projectName;
    4. xmlAddress+=".drdp";//项目的后缀名为.drdp
    5.  
    6.  
    7. QDomElement project=doc.createElement("Project");
    8. QDomElement projectInformation=doc.createElement("ProjectInformation");
    9. QDomElement createTime=doc.createElement("CreateTime");
    10. QDomElement name=doc.createElement("Name");
    11. QDomElement author=doc.createElement("Author");
    12. QDomElement description=doc.createElement("Description");
    13. QDomElement unit=doc.createElement("Unit");
    14. QDomElement type=doc.createElement("Type");
    15.  
    16.  
    17. QDomElement files=doc.createElement("Files");
    18. QDomElement chart2d=doc.createElement("Chart2D");
    19. QDomElement chart3d=doc.createElement("Chart3D");
    20. QDomElement data=doc.createElement("Data");
    21.  
    22. QDomElement databases=doc.createElement("Databases");
    23.  
    24.  
    25. doc.appendChild(project);
    26.  
    27.  
    28. project.appendChild(projectInformation);
    29. project.appendChild(files);
    30. project.appendChild(databases);
    31.  
    32. projectInformation.appendChild(createTime);
    33. projectInformation.appendChild(name);
    34. projectInformation.appendChild(author);
    35. projectInformation.appendChild(description);
    36. projectInformation.appendChild(unit);
    37. projectInformation.appendChild(type);
    38.  
    39.  
    40. QDomText txtCreateTime=doc.createTextNode(projectCreateTime.toString(Qt::DateFormat::ISODate));
    41. QDomText txtAuthor=doc.createTextNode(projectAuthor);
    42. QDomText txtName=doc.createTextNode(projectName);
    43. QDomText txtDescription=doc.createTextNode(projectDescription);
    44. QDomText txtType=doc.createTextNode("TextType");
    45. QDomText txtUnit=doc.createTextNode("TextUnit");
    46.  
    47. createTime.appendChild(txtCreateTime);
    48. name.appendChild(txtName);
    49. author.appendChild(txtAuthor);
    50. description.appendChild(txtDescription);
    51. unit.appendChild(txtUnit);
    52. type.appendChild(txtType);
    53. QDomNode xmlNode = doc.createProcessingInstruction("xml","version=\"1.0\" encoding=\"utf-8\"");
    54.  
    55. doc.insertBefore(xmlNode, doc.firstChild());
    56.  
    57.  
    58.  
    59.  
    60.  
    61.  
    62. QTextStream out(&xmlAddress);
    63.  
    64.  
    65.  
    66.  
    67.  
    68. doc.save(out,4);
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    Last edited by xiongxiongchuan; 1st June 2010 at 11:43.

  2. #2
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    Default Re: QDomDocumen save method doesn't work!

    Well, it is perfectly saved, but not where you expect it! It is saved in your QString xmlAddress. If you want to save it to a file, specified by xmlAddress, you have to use QFile first!


    And did you noticed, that you have used the wrong tags to indicate that your text is c++ code? Please use the [code] tags next time, which makes your code much more readable.

  3. The following user says thank you to Lykurg for this useful post:

    xiongxiongchuan (1st June 2010)

  4. #3
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    Default Re: QDomDocumen save method doesn't work!

    thank you i have correct this probrem

    Quote Originally Posted by Lykurg View Post
    Well, it is perfectly saved, but not where you expect it! It is saved in your QString xmlAddress. If you want to save it to a file, specified by xmlAddress, you have to use QFile first!


    And did you noticed, that you have used the wrong tags to indicate that your text is c++ code? Please use the [code] tags next time, which makes your code much more readable.

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