如何获得胜利表格的所有控件？ [英] how to get all controls of win form?

问题描述

我有一个表格名为 A 。

A 包含很多不同的控件，包括一个主分组框。这分组框包含大量的表格和其他分组框上课的。我想找到一个控制其中有例如在形式上标签指数9 A ，但我不知道是哪个分组框包含该控件。

A contains lots of different controls, including a main GroupBox. This GroupBox contains lots of tables and others GroupBoxes. I want to find a control which has e.g. tab index 9 in form A but I don't know which GroupBox contains this control.

我怎样才能做到这一点？

How can I do this?

推荐答案

通过递归...

public static IEnumerable<T> Descendants<T>( this Control control ) where T : class
{

    foreach ( Control child in control.Controls ) {

        T childOfT = child as T;
        if ( childOfT != null ) {
            yield return (T)childOfT;
        }

        if ( child.HasChildren ) {
            foreach ( T descendant in Descendants<T>( child ) ) {
                yield return descendant;
            }
        }

    }

}

您可以使用上面的函数：

You can use the above function like:

var checkBox = (from c in myForm.Descendants<CheckBox>()
                where c.TabIndex == 9
                select c).FirstOrDefault();

这会得到的第一个复选框有9.你可以明显用的TabIndex形式中的任何位置任何你想要的标准。

That will get the first CheckBox anywhere within the form that has a TabIndex of 9. You can obviously use whatever criteria you want.

修改

如果你不LINQ查询语法的粉丝，上面可以重新写为：

EDIT
If you aren't a fan of LINQ query syntax, the above could be re-written as:

var checkBox = myForm.Descendants<CheckBox>()
                     .FirstOrDefault(x=>x.TabIndex==9);

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