TabControl，遍历所有TextBoxes [英] TabControl, looping through all the TextBoxes

问题描述

大家好，
我有一个带有2个TabPages的TabControl.在每个TabPage上，我都有一些TextBoxes和ComboBoxes.在表单上还有一个下一步"按钮(onLoad Enabled = false)，当所有TextBoxes/ComboBoxes都被填充时，应该激活该按钮.
要遍历TabPages上的所有TextBoxes/ComboBoxes，我将使用以下方法解决:

TabControl.TabPageCollection页面= tabControl.TabPages;
foreach(TabPage页面在页面中)
{
page.Refresh();
var firstEmptyTextBox =(从page.Controls.OfType< TextBox>()中的t开始) 其中String.IsNullOrEmpty(t.Text)
选择t).FirstOrDefault();

var firstEmptyComboBox =(从page.Controls.OfType< ComboBox>()中的t开始) 其中String.IsNullOrEmpty(t.Text)
选择t).FirstOrDefault();
btnNext.Enabled =
(firstEmptyTextBox ==空&& firstEmptyComboBox ==空);
}

但是在更改TextBox/ComboBox输入时应该检查TabControl/TabPage上的哪个事件?我尝试了"Enter，Click"等操作，但没有成功..
感谢您的帮助.控件.可以将就绪"/未就绪"状态放入自定义EventArgs对象.

当两个标签页均以适当的就绪/未就绪状态触发事件后，您就可以采取适当的措施.

hi guys,
I''ve got a TabControl with 2 TabPages. On each TabPage I''ve got some TextBoxes and ComboBoxes. On the Form there is as well a "Next" Button (onLoad Enabled=false) which should be activated when all TextBoxes/ComboBoxes are filled.
To loop through all the TextBoxes/ComboBoxes on the TabPages I''ll solve using:

TabControl.TabPageCollection pages = tabControl.TabPages;
foreach (TabPage page in pages)
{
page.Refresh();
var firstEmptyTextBox = (from t in page.Controls.OfType<TextBox>()
where String.IsNullOrEmpty(t.Text)
select t).FirstOrDefault();

var firstEmptyComboBox = (from t in page.Controls.OfType<ComboBox>()
where String.IsNullOrEmpty(t.Text)
select t).FirstOrDefault();
btnNext.Enabled =
(firstEmptyTextBox == null && firstEmptyComboBox == null);
}

but which Event on TabControl/TabPage should I check when changing the TextBox/ComboBox Input? I tried "Enter, Click" etc. without success..
Thanks for your help

解决方案

You could setup a custom event on the tab pages that''s fired to indicate its "ready" status based on the state of the desired controls. The "ready"/"not ready" state can be put into a custom EventArgs object.

When both tabpages have fired the event with the appropriate ready/not ready status, you can then take the appropriate action.

这篇关于TabControl，遍历所有TextBoxes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！