代理替换重复代码 [英] Delegate to replace repeating code

问题描述

我在一个组框中有10个复选框。标记为全部的顶部复选框在选中全部时检查其他9个复选框。

I have 10 check boxes in a group box. The top check box labeled "All" checks the other 9 check boxes when checked is true for "All"

在其他9个复选框中，我基本上都是相同的代码。下面是两个复选框的示例：

In the other 9 checkboxes, I have essentially the same code. Here is a sample for two of the check boxes:

private void ckDal_Click(object sender, EventArgs e)
    {
        if (ckDal.Checked == false)
            ckAll.Checked = false;
    }

    private void ckHou_Click(object sender, EventArgs e)
    {
        if (ckHou.Checked == false)
            ckAll.Checked = false;
    }

我讨厌重复相同的代码。

I hate repeating the same code. How would I create a delegate to accomplish the above with just one event method?

推荐答案

您可以使用单个单击所有复选框的事件处理程序。引发事件的实际CheckBox将从 sender 参数中获取。只需将其转换为CheckBox类型：

You can use single Click event handler for all CheckBoxes. Actual CheckBox, which raised the event, will be available from sender parameter. Just cast it to CheckBox type:

private void ck_Click(object sender, EventArgs e)
{
    if (!((CheckBox)sender).Checked)
        ckAll.Checked = false;
}

此外，您不需要将布尔值与true / false进行比较可以直接在 if 语句中使用它们。

Also you don't need to compare boolean values with true/false - you can use them directly in if statement.

在这种情况下，所有复选框都被检查，并设置 ckAll.Checked = true 。

这篇关于代理替换重复代码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！