检查控件类型 [英] Checking for the control type

问题描述

我能够得到一个页面，也是他们的类型的所有控件的ID，在页面中，当我打印出来就说明

I am able to get the IDs of all the controls of a page and also their type, in the page when i print it it shows

myPhoneExtTxt Type:System.Web.UI.HtmlControls.HtmlInputText

这是基于产生这个代码

    foreach (Control c in page)
    {
        if (c.ID != null)
        {
            controlList.Add(c.ID +" Type:"+ c.GetType());
        }
    }

但现在我需要检查它的类型和访问文本，如果类型HtmlInput它的，我不太清楚如何做到这一点。

But now i need to check its type and access the text in it if its of type HtmlInput and i am not quite sure how to do that.

如同

if(c.GetType() == (some htmlInput))
{
   some htmlInput.Text = "This should be the new text";
}

我如何能做到这一点，我认为你的想法？

how can i do this, i think you get the idea?.

推荐答案

这应该是你所需要的，如果我得到你的要求：

This should be all you need if I get what you're asking:

if (c is TextBox)
{
  ((TextBox)c).Text = "This should be the new text";
}

如果你的主要目标是只需设置一些文本：

If your primary goal is to just set some text:

if (c is ITextControl)
{
   ((ITextControl)c).Text = "This should be the new text";
}

为了支持隐藏字段，以及：

In order to support a hidden field as well:

string someTextToSet = "this should be the new text";
if (c is ITextControl)
{
   ((ITextControl)c).Text = someTextToSet;
}
else if (c is HtmlInputControl)
{
   ((HtmlInputControl)c).Value = someTextToSet;
}
else if (c is HiddenField)
{
   ((HiddenField)c).Value = someTextToSet;
}

附加控制/接口将必须被添加到逻辑

Additional controls/interfaces would have to be added to the logic.

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