如何在asp.net mvc 4中将html字符串转换为jpg图像

Question

我正在尝试将html字符串从我的视图转换为图像。我能够将我的视图作为字符串，但无法将其转换为图像（base64string或字节数组）以将其返回。这是我的代码

/* Getting label design info */
LabelDesigner ObjModel = GetLabelDesignObject("Drug_Label");

/* Taking view's HTML */
string HTML = RenderRazorViewToString("~/Views/Folder/DrugLabel.cshtml", ObjModel);

.............
.............
.............
.............

public string RenderRazorViewToString(string ViewName, object Model)
    {
        string ReturnVal = string.Empty;

        try
        {
            ViewData.Model = Model;
            using (var sw = new System.IO.StringWriter())
            {
                var viewResult = ViewEngines.Engines.FindPartialView(ControllerContext, ViewName);
                var viewContext = new ViewContext(ControllerContext, viewResult.View, ViewData, TempData, sw);
                viewResult.View.Render(viewContext, sw);
                viewResult.ViewEngine.ReleaseView(ControllerContext, viewResult.View);
                return sw.GetStringBuilder().ToString();
            }
        }
        catch (Exception ex)
        {
            /* Catch Exception Here */
            log.Error("Error in Controller.cs, RenderRazorViewToString function: " + ex.Message);
        }

        return ReturnVal;
    }

在这里，我可以获取视图的HTML，但是如何将该HTML字符串转换为jpg图像？