C# WebBrowser 控件 HTMLDocument 自动选择选项下拉列表
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WebBrowser control HTMLDocument automate selecting option drop-down
提问by CWinKY
I'm trying to automate in a WinForm using a WebBrowser control to navigate and pull report info from a website. You can enter values in textboxes and invoke the click events for buttons and links, but I have not figured out how select a option drop-down .... in a automated way. Anybody recommend how to select a item from a drop-down, given this html example:
我正在尝试使用 WebBrowser 控件在 WinForm 中实现自动化，以从网站导航和提取报告信息。您可以在文本框中输入值并调用按钮和链接的单击事件，但我还没有弄清楚如何以自动方式选择选项下拉列表......。任何人都推荐如何从下拉列表中选择一个项目，给定这个 html 示例：
<SELECT id="term_id" size="1" name="p_term_in"><option value="">Select Another Term<option value="201050">Summer 2010<option value="201010">Spring 2010<option value="200980">Fall 2009</SELECT>
For others that can learn from entering values to textboxes and invoking click events here's how you do it:
对于可以通过向文本框输入值和调用点击事件来学习的其他人，您可以这样做：
webBrowser1.Document.GetElementById("<HTML ELEMENT NAME>").SetAttribute("value", "THE NAME");
Invoke button or hyperlink click:
调用按钮或超链接点击：
webBrowser1.Document.GetElementById("<BUTTON>").InvokeMember("click");
So I've solved entering values and invoking click, but I have not solved selecting a drop-down value.
所以我已经解决了输入值和调用点击的问题，但我还没有解决选择下拉值的问题。
采纳答案by Darin Dimitrov
Assuming you have the following select in the HTML:
假设您在 HTML 中有以下选择：
<select id="term_id" size="1" name="p_term_in">
<option value="">Select Another Term
<option value="201050">Summer 2010
<option value="201010">Spring 2010
<option value="200980">Fall 2009
</select>
This should allow you to preselect the third value:
这应该允许您预先选择第三个值：
webBrowser1.Document.GetElementById("term_id").SetAttribute("value", "201010");
回答by AxelEckenberger
You will have to select the selectedattribute on the option you want.
您必须selected在所需选项上选择属性。
Given:
鉴于：
<select id="mySelect">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
The following would selct the third option:
以下将选择第三个选项：
webBrowser1.Document
.GetElementById("")
.Children.GetElementsByName("option")[2]
.SetAttribute("selected", "selected");
回答by mattb
try this:
尝试这个：
add reference to microsoft.mshtml in project --> add reference...
在项目中添加对 microsoft.mshtml 的引用 --> 添加引用...
Dim cboTemp As mshtml.HTMLSelectElement
cboTemp = WebBrowser1.Document.GetElementById("myselect").DomElement
cbotemp.selectedindex = 2
having the variable cbotemp set to a select element gives you greater access to the control :)
将变量 cbotemp 设置为 select 元素可以让您更好地访问控件:)
回答by Tom
HtmlElement hField = webBrowser1.Document.GetElementById("ID");
hField.SetAttribute("selectedIndex", "2");
select by index(zero based) not the value....
按索引选择（从零开始）而不是值....
回答by Kiquenet
var select = webBrowser.Document.GetElementById("ddlProyectos");
mshtml.HTMLSelectElement cbProyectos = select.DomElement as mshtml.HTMLSelectElement;
var total = cbProyectos.length;
for (var i= 0; i < total; i++)
{
cbProyectos.selectedIndex = i;
if (cbProyectos.value.Contains("13963"))
{
break;
}
}
//cbProyectos.selectedIndex = 4;
select.InvokeMember("onchange");
select.Children[4].SetAttribute("selected", "selected");
var theElementCollection = webBrowser.Document.GetElementsByTagName("select");
foreach (HtmlElement el in theElementCollection)
{
if (el.GetAttribute("value").Equals("13963"))
{
el.SetAttribute("selected", "selected");
//el.InvokeMember("click");
}
}
回答by DennisUKSW
You can use this:
你可以使用这个：
webBrowser1.Document.GetElementById("term_id").SetAttribute("value",yourText);
回答by TareqNewazShahriar
I'm answering on this post after five years, for the people who are searching a solution of this problem.
五年后，我正在为正在寻找此问题解决方案的人们回答这篇文章。
If you just need to submit/post a value for the dropdown then this line is sufficient:
如果您只需要提交/发布下拉列表的值，那么此行就足够了：
webBrowser1.Document.GetElementById("term_id").SetAttribute("value", "200980");
But if you really need to select an underlying OPTION, then:
但是如果你真的需要选择一个底层的 OPTION，那么：
HtmlElement selectDom = webBrowser1.Document.GetElementById("term_id");
foreach (HtmlElement option in selectDom.GetElementsByTagName("option"))
{
if (option.GetAttribute("value") == "200980")
{
var dom = option.DomElement as dynamic;
dom.selected = true;
// selectDom.InvokeMember("onChange"); // if you need this too
break;
}
}
