在C＃中使用InnerText递归查找UIElement [英] Recursively locating a UIElement with InnerText in C#

问题描述

我在页面上有许多HTMLDIV，并且尝试使用

I have a number of HTMLDIV on a page and I am trying to locate a particular one using the

UIElement.getProperty("InnerText")

问题是我不知道DIV将有多少个孩子，有多少个将元素降级。因此，尽管递归适用于这种情况，而不是嵌套的FOREACH语句。但是由于我的DIVS没有填充.NAME属性，并且 .GetType 始终是'HTMLDIV'，所以我不知道如何访问。 子元素。我将使用这种类型的方法：

The problem is I never know how many children the DIV will have and how many levels down the element will be. So I though recursion would work for this situation rather than nested FOREACH statements. However as my DIVS do not have a .NAME property populated and .GetType is always 'HTMLDIV' I don't know how to access the .Innertext of the child element. I was going to use this type of method:

    ControlTypeIWantToFind result = 
                FindVisualChild<ControlTypeIWantToFind>(myPropertyInspectorView);

public static T FindVisualChild<T>(DependencyObject depObj, string strMyInnerText) where T : DependencyObject
{
    if (depObj != null)
    {
        for (int i = 0; i < VisualTreeHelper.GetChildrenCount(depObj); i++)
        {
            DependencyObject child = VisualTreeHelper.GetChild(depObj, i);
            if (child != null && child is T)
            {
                return (T)child;
            }

            T childItem = FindVisualChild<T>(child);
            if (childItem != null) return childItem;
        }
    }
    return null;
}

但是我想我需要这样的东西：

But I think I need something like this:

if (child != null && child.innerText == strMyInnerText)

我希望一切都说得通。

推荐答案

在我曾经使用过的地方基于以下代码。它会找到所有 InnerText 项。

In one place I used code based on that below. It finds all InnerText items.

someControl.SearchProperties.Add("InnerText", "", PropertyExpressionOperator.Contains);
UITestControlCollection colNames = someControl.FindMatchingControls();

在另一个地方，我使用了：

In another place I used:

string s = "";  // In case there is no InnerText.
try
{
    s = control.GetProperty("Text").ToString();
}
catch ( System.NotSupportedException )
{
    // No "InnerText" here.
}

该异常未记录在 GetProperty ，我想我在对确实执行此操作的控件上调用该方法时发现了它没有 InnerText 。我找不到任何 TryGetPropertyMethod ，但是编写自己的代码很容易。

The exception is not documented with GetProperty, I think I found it when calling the method on controls that did not have an InnerText. I could not find any TryGetPropertyMethod, but it would be easy to write your own.

我还使用了基于此递归例程的代码来访问层次结构中的所有控件。

I also used code based on this recursive routine to visit all the controls in the hierarachy.

private void visitAllChildren(UITestControl control, int depth)
{
    UITestControlCollection kiddies = control.GetChildren();

    foreach ( UITestControl kid in kiddies )
    {
        if ( depth < maxDepth )
        {
            visitAllChildren(kid, depth + 1);
        }
    }
}

这篇关于在C＃中使用InnerText递归查找UIElement的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！