如何清空选择元素或选择空选项？ C＃Web驱动程序

Question

I need select element to be empty, how can I do that? I tried with selectbytext and empty value, but it did not worked.

selectElement2.SelectByText(""); //(failed)

<option value=""></option>
<option value="1" selected="selected">Testing1</option>
<option value="2">Testing2</option>
...

Answer 1

You can try

 new Select(driver.findElement(By.xpath("//selection box"))).selectByIndex(0);

 //or

 new Select(driver.findElement(By.xpath("//selection box"))).selectByValue("");

 //or

 driver.findElement(By.xpath("//selection box")).sendKeys("");

Answer 2

此语法可能会有所帮助

$('#DdlSiteName').empty();

Answer 3

You can use Deselect method from Select class

selectElement2.DeselectByValue("1");
// or
selectElement2.DeselectByIndex(1);
// or
selectElement2.DeselectByText("Testing1");

Answer 4

In the case you presented, it should just be

selectElement2.SelectByValue("");

Take a look at the docs for .Net

SelectByIndex() , SelectByText() , and SelectByValue() are available. Index is by the index of the OPTION tags, starting with 0, so index = 1 is "Testing1". NOTE: Don't confuse index with value, in this case they are the same. Text is the visible text in the dropdown, eg "Testing1" in your sample is currently selected. Value is the value inside the OPTION tag, eg "1" for "Testing1".