selenium 不支持IE条件下滚动条滚动，不支持视野之外元素操作，解决办法

在项目中我遇到这个这样问题，需要验证6个checkbox，每个checkbox需要输入一组值，让后再下方显示搜索结果，因为每个checkbox被检索的值搜出的结果数量 不一样，有的检索结果值很多，直接把滚动条拉大下方了，当脚本检查下个checkBox的时候，selenium在IE环境下，不支持不可视化查找，所以就没点击到下个checkBox，导致失败，解决办法是把焦点移到到下个checxbox，这就需要移到页面滚动条，我们可以使用这个函数radioElement.SendKeys("");把焦点移到需要检测的元素上，下面为操作代码：

 

 

foreach (var radioElement in radioElements)
            {
                if (radioElement.Text == type && searchValue != null)
                {
                    string elementText = radioElement.Text;

                    radioElement.SendKeys("");
                                      radioElement.Click();

                    Log(string.Format("radio type is '{0}' ", elementText));
                    var searchInputElement = GetElement(WindowPanel, By.CssSelector(".x-form-text.x-form-field"));
                    Log(string.Format("Enter search value is '{0}' ", searchValue));
                    searchInputElement.SendKeys(searchValue);
                  
                    var searchResultPanel = WaitForElementPresent(WindowPanel, By.ClassName("fromMultiselect"));
                 
                    if (action.notMatchTip == null)
                    {
                        Waitloading(searchResultPanel);
                        Assert.IsTrue(IsElementExist(searchResultPanel, searchValue, "ux-mselect-noborder-item", true), "In the search text field enter the value " + searchValue + " can't be searched");
                    }
                    else
                    {
                        Waitloading(searchResultPanel);
                        Assert.IsTrue(IsElementExist(searchResultPanel, notMatchTip, "ux-mselect-noborder-item", true), "Not match value " + searchValue + " hasn't not match tip");
                    }
              
                    searchInputElement.SendKeys(new string((char)8, 40));
                    WaitDeleteSearchResults(searchResultPanel);
                   
                }
            }