在面板中选择多个文本框 [英] Select several textboxes in a panel

问题描述

我有几个嵌套在面板中的文本框，我想检查它们是否有文本.虽然我不想这样写我的代码:

I have several textboxes nested in a panel and I want to check if they have text or not. Although I don't want to write my code like this:

if(textbox1.Text != "" && textbox2.Text != "" ...) 
{
    ...
}

有没有什么方法可以自动执行此操作并提高代码本身的总体质量?

Is there any way to automate this and improve the general quality of the code itslef?

推荐答案

这可以通过使用 System 的 OfType 和 All 扩展方法很容易地完成.Linq.

This can be done very easily by using OfType and All extension methods from System.Linq.

var panel = new Panel
{
    Size = new Size(500, 500),
    BackColor = Color.Red
};

panel.Controls.Add(new TextBox { Text = "Value" });
panel.Controls.Add(new TextBox { Text = "Value2" });

if (panel.Controls.OfType<TextBox>().All(x => !string.IsNullOrEmpty(x.Text)))
{
    //Do something
}

if 语句中的代码只有在 TextBoxes 的所有 Text 属性都不为空时才会执行.

The code in the if statement will only execute if all the Text properties of TextBoxes are not empty.

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