迭代通过asp.net页面上的所有控件 [英] Iterate though all controls on asp.net page

问题描述

我使用ascx，我需要遍历所有的控件，并选择每个cssClass属性设置为'required'。

I'm using ascx and I need to iterate through all of the controls and selects each that have cssClass attribute set to 'required'.

我有以下代码：

foreach (Control masterControl in Page.Controls)
        {
            if (masterControl is MasterPage)
            {
                foreach (Control formControl in masterControl.Controls)
                {
                    if (formControl is System.Web.UI.HtmlControls.HtmlForm)
                    {
                        foreach (Control contentControl in formControl.Controls)
                        {
                            if (contentControl is ContentPlaceHolder)
                            {
                                foreach (Control childControl in contentControl.Controls)
                                {

                                }
                            }
                        }
                    }
                }
            }
        }

但是我无法访问childControl.CssClass。如何访问？

however.. i cannot access childControl.CssClass. How do I access it?

提前感谢！

推荐答案

CssClass 媒体资源是的成员WebControl类。

你必须检查控件是否是一个web控件，或者，如果它只是一个控件，你可以获得属性class属性集合。

You have to check if the control is a webcontrol, or, if it's only a control, you can get the attribute "class" in the attributes collection.

例如，您可以：

List<WebControl> wcs = new List<WebControl>();
GetControlList<WebControl>(Page.Controls, wcs)
foreach (WebControl childControl in wcs)
{
     if(childControl.CssClass == "required") {
          // process the control
     }
}

递归。在此处找到代码：使用C＃递归从控件集合获取控件的集合：

You also have to iterate recursively. Code found here : Using C# to recursively get a collection of controls from a controlcollection :

private void GetControlList<T>(ControlCollection controlCollection, List<T> resultCollection)
where T : Control
{
    foreach (Control control in controlCollection)
    {
        //if (control.GetType() == typeof(T))
        if (control is T) // This is cleaner
            resultCollection.Add((T)control);

        if (control.HasControls())
            GetControlList(control.Controls, resultCollection);
    }
}

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