如何将乳胶配方图像保存到Asp.net中的文件夹

Question

I am using latex for using formula in my project. Here is my code

  EqEditor.embed('editor', ''); var a = new EqTextArea('equation', 'testbox'); EqEditor.add(a, false); 

  <link rel="stylesheet" type="text/css" href="http://latex.codecogs.com/css/equation-embed.css" /> 

 <script type="text/javascript" src="http://latex.codecogs.com/js/eq_config.js"></script> <div id="editor"></div> <br /> <br /> <textarea id="testbox" rows="3" cols="40"></textarea> <br /> <br /> <img id="equation" /> 

Now I want, after making formula When I click submit button, the formula should be save to a folder in my project with some name such as formula.png
Please help me, either using javascript or c#

Answer 1

I found a quick solution. It uses an URL and takes param and produces image.

Eg If I want to save "A + B = C", then you can follow these steps to produce image programatically.

1. Encode that string, like this - var k = encodeURI("a + b = c"); . value of k will be equal to a%20+%20b%20=%20c .
2. Use that k in url = "http://latex.codecogs.com/gif.latex?" + k url = "http://latex.codecogs.com/gif.latex?" + k . So that will equal to http://latex.codecogs.com/gif.latex?a%20+%20b%20=%20c .

3. You can save that remote URL image to server using following code -

    using( System.Net.WebClient wc = new System.Net.WebClient()) { wc.DownloadFile("http://latex.codecogs.com/gif.latex?a%20+%20b%20=%20c", @"D:\\a.gif"); // replace a.gif with actual file path, that will saved in server. }