javascript - Read xml file, modify the values/add elements/attributes and save the xml how? -


By using javascript, I want to read XML file from disk, modify values ​​/ add elements / attributes and XML back Save on Disk

Anyone here knows what can I find examples that work with IE and Firefox? I already look for examples to read, which is now changing the problem.

Thanks

Assume that you try to read and write discs from the browser And node.Jes, the first step is to use a input tag file to use the file system. 

  & lt ;! DOCTYPE html & gt; & Lt; Top & gt; & Lt; Meta charset = "UTF-8" & gt; & Lt; / Head & gt; & Lt; Body & gt; & Lt; Input type = "file" id = "input" accept = "text / xml" & gt; & Lt; Script src = "script.js" & gt; & Lt; / Script & gt; & Lt; / Body & gt;

As soon as a file is selected, we want to remove the body from the element. To do this, a good moment change occurs during the event. 

  const input = document.query selector ('#input'); Input.addEventListener ('change', () = & gt; {const file = input.files.item (0);});

One of the elements is more than one way to parse the blur in a tree. Here I took advantage of the fact that the browser parses XML documents in HTTP requests. 

  function blobbed document (blob, callback) {const url = URL.createObjectURL (blob); Const Request = New XMLHttpRequest (); Request.open ('go', url); Request.responseType = 'document'; Request.addEventListener ('Load', () = & gt; {callback (request.response);}); Sent request (); }

After the Blob has been read, we can manipulate it as if we can manipulate the Dome tree. 

  function edit document (document) {const element = document .createElement ('editor'); Element.textContent = 'JavaScript'; Document.firstChild.appendChild (element); Return document; }

To save the file to disk, we need to reverse the process of parsing, converting the elements tree back into string. 

  function DocumentToString (document) {const serializer = new XMLSerializer (); Return Serializer. Cyrillic toaster (document); }

The file is left to return to disk. To get this, we can trigger a click event on the link with our modified file. 

  Function Download (string, mime) {const blob = new blob ([string], {type: mime}); Const a = document.createElement ('a'); Const url = URL.createObjectURL (blob); A.href = url; A.download = 'document.xml'; A.click (); }

This is the complete code 

  const input = document.query selector (' # Input '); Input.addEventListener ('change', () => {const file = input.files.item (0); blobToDocument (file, (xmlDocument) = & gt; {editDocument (xmlDocument); Download (documentToString (xmlDocument) , "Text / xml");});}); Function Blob Toddcast (Blob, Callback) {const url = URL.createObjectURL (Blob); Const Request = New XMLHttpRequest (); Request.open ('go', url); Request.responseType = 'document'; Request.addEventListener ('Load', () = & gt; {callback (request.response);}); Sent request (); } Edit document (document) {const element = document.createElement ('editor'); Element.textContent = 'JavaScript'; Document.firstChild.appendChild (element); Return document; } Function documentToString (document) {const serializer = new XMLSerializer (); Return Serializer. Cyrillic toaster (document); } Download function (string, mime) {const blob = new blob ([string], {type: mime}); Const a = document.createElement ('a'); Const url = URL.createObjectURL (blob); A.href = url; A.download = 'document.xml'; A.click (); }  
  & lt ;! DOCTYPE html & gt; & Lt; Top & gt; & Lt; Meta charset = "UTF-8" & gt; & Lt; / Head & gt; & Lt; Body & gt; & Lt; Input type = "file" id = "input" accept = "text / xml" & gt; & Lt; Script src = "script.js" & gt; & Lt; / Script & gt; & Lt; / Body & gt;


Comments

Post a Comment

Popular posts from this blog

sql - dynamically varied number of conditions in the 'where' statement using LINQ -

I am using my first project LINQ (in mvc), so maybe there's something very simple that I remember. However, a day of searching and experimenting does not work, so it works. I am trying to write a LINQ query (Linux to SQL) in which in many cases where the statement is different from an OR or an AND. We do not know how many conditions are going in the query till runtime. This search is for filter control, where the user can choose multiple criteria for filtering. Select from table where table.col = 1 or table.col = 2 or table.col = 7 .... 'Other number of conditions Before I just create the SQL query as a string, while looping over all the situations. However, it seems that there should be a good way to do this in LINQ. I tried to use Expression trees, but they had a second thought for this moment on my head, where the lambda function was to be executed inside the statement such as: values ​​for matchingRows = matchingRows for each value Where (function (row) row.c...
Read more

asp.net mvc - Dynamically Generated Ajax.BeginForm -

I have a problem with ASP.NET MVC Ajax forms. I generate many Ajax form in a table such as: & Lt; Input type = "submit" name = "activity" value = "add activity" / & gt; & Lt;%}% & gt; & Lt; / TD & gt; & Lt; / TR & gt; & Lt;%}% & gt; So far so good. When I post one of those forms, it gives a partial view in a div, and in this new partial view a new Ajax Beginnform (which is not in Genesis form) This second Ajax Beginnorf is exactly like the ones I got on the table, but when I post it, I do not get the "Ajax Post", but a normal post that sends me to a new page, I do not know whether the two Ajax forms What is the reason for the difference between, why is it the "dynamically generated" Ajax form behaves like a normal HTML form? By the way, I know that I can do it in different ways using javascript, but I would like to understand whether it can only be done using MVC helplars and Ajax lib...
Read more

Debug on symbian -

I am using trk for phone debug This works well for the Holorld project But when I start the project in phone debug mode 1) the load failed 2) TrkProtocolPlugin: to target the specified file Failure (please verify If any body understands what problem I am experiencing, then this problem helps me Pre-release If the application has the privileges assigned (with the appropriate certificate) itemprop = "text" > In your case, I will check: / li> If there is no conflict of application ID with any other application of device If there are problematic commands in the installation package (for example copy copy for non-accessible directories)
Read more