将xml路径传递给位图时参数错误无效

Question

我需要将xml图像路径传递给位图。我有一个xml文件，其中我有应用程序中使用的所有图像路径。下面是代码。我得到无效的参数错误。

  protected void Button1_Click(object sender, EventArgs e)
    {

        XmlDocument xmldoc = new XmlDocument();
        string file = HttpContext.Current.Server.MapPath("XMLFile1.xml");
        xmldoc.Load(file);
        string path = xmldoc.SelectSingleNode("ImagesXml/Ad/ImageUrl2").InnerText;
        Bitmap b = new System.Drawing.Bitmap(xmldoc.SelectSingleNode("ImagesXml/Ad/ImageUrl2").InnerText);

        Graphics g = Graphics.FromImage(b);
        MemoryStream memStream = new MemoryStream();
        g.SmoothingMode = SmoothingMode.AntiAlias;

        }

Answer 1

试试这个。

Image img = Image.FromFile(xmldoc.SelectSingleNode("ImagesXml/Ad/ImageUrl2").InnerText);     
Bitmap bm = new Bitmap(img);     
Graphics g = Graphics.FromImage (bm);