Question

namespace WebCap
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            Skybound.Gecko.Xpcom.Initialize(@"C:\Program Files\xulrunner");
        }

        private void button1_Click(object sender, EventArgs e)
        {
            geckoWebBrowser1.Navigate(addtxbox.Text);
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {

        }

        private void geckoWebBrowser1_Navigating(object sender, Skybound.Gecko.GeckoNavigatingEventArgs e)
        {
            addtxbox.Text = geckoWebBrowser1.Url.ToString();
        }

        private void geckoWebBrowser1_DocumentCompleted(object sender, EventArgs e)
        {
            if ((geckoWebBrowser1.Url.ToString() == "http://kolotibablo.com/bablo.php?action=workInterface"))
            {
                HtmlElement elem = geckoWebBrowser1.Document.GetElementById("mainCaptchaImg");
                string src = elem.GetAttribute("src");
                this.ptcapget.ImageLocation = src;
            }
        }
    }
}

我使用Skybound GeckoFX在C＃中制作webbrowser，但我无法使用

HtmlElement elem = geckoWebBrowser1.Document.GetElementById("mainCaptchaImg")

显示此错误错误：

'无法将类型'Skybound.Gecko.GeckoElement'隐式转换为'System.Windows.Forms.HtmlElement'

Answer 1

GetElementById方法返回GeckoElement，不 a HtmlElement。

就像您无法将string存储为int一样，您无法将GeckoElement存储为HtmlElement，而这正是您要在此处执行的操作。

修改你的本地变量类型，一切都应该很好：

GeckoElement elem = geckoWebBrowser1.Document.GetElementById("mainCaptchaImg")

我不能使用geckoWebBrowser1.Document.GetElementById？

1 个答案: