C# 检查控件类型
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Checking for the control type
提问by user1416156
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
我可以在打印页面时获取页面中所有控件的 ID 以及它们的类型
myPhoneExtTxt Type:System.Web.UI.HtmlControls.HtmlInputText
this is generated based on this code
这是基于此代码生成的
foreach (Control c in page)
{
if (c.ID != null)
{
controlList.Add(c.ID +" Type:"+ c.GetType());
}
}
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.
但是现在我需要检查它的类型并访问其中的文本（如果它的类型为 HtmlInput 并且我不太确定该怎么做）。
Like
喜欢
if(c.GetType() == (some htmlInput))
{
some htmlInput.Text = "This should be the new text";
}
how can i do this, i think you get the idea?.
我该怎么做，我想你明白了？
采纳答案by Jaime Torres
This should be all you need if I get what you're asking:
如果我得到你的要求，这应该就是你所需要的：
if (c is TextBox)
{
((TextBox)c).Text = "This should be the new text";
}
If your primary goal is to just set some text:
如果您的主要目标只是设置一些文本：
if (c is ITextControl)
{
((ITextControl)c).Text = "This should be the new text";
}
In order to support a hidden field as well:
为了也支持隐藏字段：
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;
}
Additional controls/interfaces would have to be added to the logic.
额外的控件/接口必须添加到逻辑中。
