(How to)Windows Live Writer插入Latex公式

1、首先构建出如下窗体：

    

private void InitializeComponent() {
       this.buttonOK = new System.Windows.Forms.Button();
       this.textBoxLaTeX = new System.Windows.Forms.TextBox();
       this.label1 = new System.Windows.Forms.Label();
       this.SuspendLayout();
       ...}

2、在buttonOK_Click事件中构造要插入的代码：

public partial class LaTeXInput : Form {
    // Constructor
     public LaTeXInput() {
         InitializeComponent();
    }

    // public properties
    public string ResultHTML {
        get { return m_result_gchart_html; }
    }

    // data members
    string m_result_gchart_html = "";

    private void buttonOK_Click(object sender, EventArgs e) {
        // get original latex string, and encode it
        string raw_latex = textBoxLaTeX.Text;
        string encoded_str = HttpUtility.UrlEncode(raw_latex);
        string gchart_url = "http://chart.googleapis.com/chart?cht=tx&chl=" + encoded_str;

        m_result_gchart_html = String.Format("<p><img src=\"{0}\" /></p>", gchart_url);

        this.DialogResult = DialogResult.OK;
    }
}

3、根据Windows Live Writer插件编写规范编写自己的插件类：

[WriterPluginAttribute(
        "24E0269C-D61B-11E0-A846-6D254824019B",
        "LaTeX Chart",
        Description = "A simple LaTeX render plugin for Windows Live Writer",
        HasEditableOptions = false,
        ImagePath = "formula_icon.jpg",
        PublisherUrl = "http://liselsia.org"
    )]
    [InsertableContentSourceAttribute("LaTeX Chart")]
    public class LaTeXPlugin : ContentSource {
        public override DialogResult CreateContent(IWin32Window dialogOwner, ref string content) {
            LaTeXInput input_form = new LaTeXInput();

            if (DialogResult.OK == input_form.ShowDialog()) {
                content = input_form.ResultHTML;
            }

            input_form.Dispose();
            return DialogResult.OK;
        }
}

注：只要改动第二个ref传入的content参数，就能直接改变最终在Live Writer里要加入的HTML代码。而为了弹出如下的一个输入LaTeX的对话框，又需要添加一个Windows Form窗口，同时加上System.Windows.Forms.dll的.NET库的引用。然后以上述代码所示的input_form.ShowDialog()的方式弹出模态对话框(modal dialog)。

项目地址：https://code.google.com/p/wlwlatex/

SVN：http://wlwlatex.googlecode.com/svn/trunk/