Question

private void button5_Click(object sender, EventArgs e)
{
    HtmlElementCollection links = webBrowser1.Document.GetElementsByTagName("input");
    foreach (HtmlElement link in links)
    {
        if (link.GetAttribute("className")== "input-style1 psgn-name")
        {
            textBox10.Text = link.GetAttribute("id");
        }
    }
}

结果：我只获得4个元素的第4个元素id的id，具有相同的类。现在如何获得3元素id的其余部分？

Answer 1

在文本框中，每次都会覆盖ID。您需要在文本框中连接字符串。所以......

private void button5_Click(object sender, EventArgs e)
{
    HtmlElementCollection links = webBrowser1.Document.GetElementsByTagName("input");
    foreach (HtmlElement link in links)
    {
        if (link.GetAttribute("className")== "input-style1 psgn-name")
        {
            textBox10.Text += link.GetAttribute("id") + ",";
        }
    }

    // Remove last comma
    if(!string.IsNullOrWhiteSpace(textBox10.Text)){
        textBox10.Text = textBox10.Text.Substring(0, textBox10.Text.Length - 1);
    }
}

现在，在文本框中，您可以看到以逗号分隔的元素ID列表。

如果要设置不同的文本框：

private void button5_Click(object sender, EventArgs e)
{
    HtmlElementCollection links = webBrowser1.Document.GetElementsByTagName("input");
    int i = 10;
    foreach (HtmlElement link in links)
    {
        if (link.GetAttribute("className")== "input-style1 psgn-name")
        {
            foreach(Control ctrl in Controls)
            {
                if (ctrl is TextBox){
                    TextBox tb = (CheckBox)c;
                    if(tb.Name == "textBox" + i) {
                        i++;
                        tb.Text = link.GetAttribute("id");
                    }
                }
            }
        }
    }
}

或者

private void button5_Click(object sender, EventArgs e)
{
    HtmlElementCollection links = webBrowser1.Document.GetElementsByTagName("input");
    int i = 10;
    foreach (HtmlElement link in links)
    {
        if (link.GetAttribute("className")== "input-style1 psgn-name")
        {
            TextBox tb = Controls.Find("textBox" + i) as TextBox;
            i++;

            if(tb != null) {
                tb.Text = link.GetAttribute("id");
            }
        }
    }
}

Answer 2

每次循环迭代都会覆盖文本值。

更新的代码：

private void button5_Click(object sender, EventArgs e)
{
    HtmlElementCollection links = webBrowser1.Document.GetElementsByTagName("input");

    foreach (HtmlElement link in links)
    {
        if (link.GetAttribute("className")== "input-style1 psgn-name")
        {
                textBox10.Text += link.GetAttribute("id");
        }
    }
}

如果您想说如果将前四个项目存在于不同的文本框中，那么您需要填充一个列表，然后像这样引用它：

private void button5_Click(object sender, EventArgs e)
{
    HtmlElementCollection links = webBrowser1.Document.GetElementsByTagName("input");
    List<String> results = new List<String>();
    foreach (HtmlElement link in links)
    {
        if (link.GetAttribute("className")== "input-style1 psgn-name")
        {
                results.Add(link.GetAttribute("id"));
        }
    }
    textbox10.Text = results[0];
    textbox11.Text = results[1]; etc....
}

使用Linq可以提供更优雅的解决方案：

//需要使用System.Linq

String[] results = (from itm in links where itm.GetAttribute("className") == "input-style1 psgn-name" select itm.GetAttribute("id")).ToArray();

然后用数组元素填充你的框。

使用classname获取元素id，在c＃中使用具有相同类名的多个元素

2 个答案: