C# WinForm WebBrowser (三) 编辑模式

一、启用编辑模式、浏览模式及自动换行

/// <summary>
/// 编辑模式
/// </summary>
public void EditMode()
{
    if (this.webBrowser.Document != null)
    {
        mshtml.IHTMLDocument2 doc = this.webBrowser.Document.DomDocument as mshtml.IHTMLDocument2;
        if (doc != null)
        {
            doc.designMode = "on";
        }
    }
}
 
/// <summary>
/// 启用浏览模式
/// </summary>
public void BrowseMode()
{
    if (this.webBrowser.Document != null)
    {
        mshtml.IHTMLDocument2 doc = this.webBrowser.Document.DomDocument as mshtml.IHTMLDocument2;
        if (doc != null)
        {
            doc.designMode = "off";
        }
    }
}
 
/// <summary>
/// 设置自动换行
/// </summary>
/// <param name="value"></param>
public void SetAutoWrap(bool value)
{
    mshtml.HTMLDocument doc = this.webBrowser.Document.DomDocument as mshtml.HTMLDocument;
    if (doc != null)
    {
        mshtml.HTMLBody body = doc.body as mshtml.HTMLBody;
        if (body != null)
        {
            body.noWrap = !value;
        }
    }
}

在编辑模式下，可以使用：

1	`this.webBrowser.Document.ExecCommand([string],[bool],[object]);`

方法来操作WebBrowser中的HTML。

其中第一个字符串类型的参数为：要执行的命令的名称。

第二个布尔类型的参数为：是否向用户显示命令特定的对话框或消息框。

第三个Object类型的参数为：要使用该命令分配的值。并非适用于所有命令。

常见的命令有：

private const string HTML_COMMAND_BOLD = "Bold";                       //加粗
private const string HTML_COMMAND_UNDERLINE = "Underline";             //下划线
private const string HTML_COMMAND_ITALIC = "Italic";                   //斜体
private const string HTML_COMMAND_SUBSCRIPT = "Subscript";             //下标
private const string HTML_COMMAND_SUPERSCRIPT = "Superscript";         //上标
private const string HTML_COMMAND_STRIKE_THROUGH = "StrikeThrough";    //删除线
private const string HTML_COMMAND_FONT_NAME = "FontName";              //字体
private const string HTML_COMMAND_FONT_SIZE = "FontSize";              //字号
private const string HTML_COMMAND_FORE_COLOR = "ForeColor";            //字体前景色
private const string HTML_COMMAND_BACK_COLOR = "BackColor";            //字体背景色
private const string HTML_COMMAND_INSERT_FORMAT_BLOCK = "FormatBlock"; //加粗
private const string HTML_COMMAND_REMOVE_FORMAT = "RemoveFormat";      //清楚样式
private const string HTML_COMMAND_JUSTIFY_LEFT = "JustifyLeft";        //文本左对齐
private const string HTML_COMMAND_JUSTIFY_CENTER = "JustifyCenter";    //文本中间对齐
private const string HTML_COMMAND_JUSTIFY_RIGHT = "JustifyRight";      //文本右对齐
private const string HTML_COMMAND_JUSTIFY_FULL = "JustifyFull";        //文本两端对齐
private const string HTML_COMMAND_INDENT = "Indent";                   //增大缩进量
private const string HTML_COMMAND_OUTDENT = "Outdent";                 //减小缩进量
private const string HTML_COMMAND_INSERT_LINE = "InsertHorizontalRule";//插入分割符
private const string HTML_COMMAND_INSERT_LIST = "Insert{0}List"; // replace with (Un)Ordered 插入项目符号或项目编号
private const string HTML_COMMAND_INSERT_IMAGE = "InsertImage";         //插入图像
private const string HTML_COMMAND_INSERT_LINK = "CreateLink";           //插入链接
private const string HTML_COMMAND_REMOVE_LINK = "Unlink";               //移除链接
private const string HTML_COMMAND_TEXT_CUT = "Cut";                     //剪切
private const string HTML_COMMAND_TEXT_COPY = "Copy";                   //复制
private const string HTML_COMMAND_TEXT_PASTE = "Paste";                 //粘贴
private const string HTML_COMMAND_TEXT_DELETE = "Delete";               //删除
private const string HTML_COMMAND_TEXT_UNDO = "Undo";                   //撤销
private const string HTML_COMMAND_TEXT_REDO = "Redo";                   //恢复
private const string HTML_COMMAND_TEXT_SELECT_ALL = "SelectAll";        //全选
private const string HTML_COMMAND_TEXT_UNSELECT = "Unselect";           //取消选择
private const string HTML_COMMAND_TEXT_PRINT = "Print";                 // 打印
private const string HTML_COMMAND_EDITMODE = "EditMode";                // 编辑模式
private const string HTML_COMMAND_BROWSEMODE = "BrowseMode";            // 浏览模式
private const string HTML_COMMAND_OVERWRITE = "OverWrite";             //转换插入、覆写模式