System.NotSupportedException:“集合为只读".从iList中删除对象时抛出 [英] System.NotSupportedException: 'Collection is read-only.' thrown when removing object from iList

问题描述

运行下面的代码片段时会引发异常.

I'm getting an exception thrown when running the snippet of code below.

我有一个iListof Webelements，如果该元素包含字符串"WSC"，我想将其从iList中删除.

I have an iListof webelements, and if that element contains the string "WSC", I'd like to remove it from the iList.

有人可以帮我吗?下面的代码.

Can anyone help me out? Code below.

IList<IWebElement> tableRows;
        tableRows = FindElement(By.XPath("//div[@ui-grid='vm.gridWoodSmokeViolations']")).FindElements(By.XPath("//div[@role='row']"));
        Console.WriteLine("table row count before loop: " + tableRows.Count);
        foreach (var row in tableRows) {

            if (row.Text.ToString().Contains("WSC"))
            {

                tableRows.Remove(row); //exception thrown here

            }

        }

感谢您可能提供的帮助

推荐答案

并非所有实施IList的东西都是可编辑的.最简单的解决方案是使用Linq来构建过滤器并对其执行ToList().

Not all things that implments IList are editable. The easiest solution is just use Linq to build a filter and do a ToList() on it.

    IList<IWebElement> tableRows;
    tableRows = FindElement(By.XPath("//div[@ui-grid='vm.gridWoodSmokeViolations']")).FindElements(By.XPath("//div[@role='row']"));

    Console.WriteLine("table row count before loop: " + tableRows.Count);

    tableRows = tableRows.Where(row=> !row.Text.ToString().Contains("WSC")).ToList();

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