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

问题描述

我正在使用 ascx，我需要遍历所有控件并选择每个将 cssClass 属性设置为必需"的控件.

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.如何访问它?

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

提前致谢！

推荐答案

CssClass 属性是 WebControl 类.

你必须检查控件是否是一个webcontrol，或者，如果它只是一个控件，你可以在attributes集合中获取属性class".

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，你可以这样做:

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

您还必须递归迭代.代码在这里找到:使用 C# 递归从 controlcollection 中获取控件集合:

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);
    }
}

这篇关于遍历 asp.net 页面上的所有控件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！