c# - 有什么办法可以使这段代码更短？

This question already has answers here:

What is the best way to clear all controls on a form C#?

(8个答案)


5年前关闭。

//list the controls from the  main form
foreach (Control c in Controls)
{
    if (c is ComboBox)
    {
        ((ComboBox)c).SelectedIndex = -1;
    }
    else if (c is TextBox)
    {
        ((TextBox)c).Text = "";
    }
    else if (c is CheckBox)
    {
        ((CheckBox)c).Checked = false;
    }
    //etc. with FIFTY different types to check against
}

最佳答案

使用此方法来设置控件的属性:

public void Set(object obj, string property, object value)
{
    //use reflection to get the PropertyInfo of the property you want to set
    //if the property is not found, GetProperty() returns null
    var propertyInfo = obj.GetType().GetProperty(property);
    //use the C# 6 ?. operator to only execute SetValue() if propertyInfo is not null
    propertyInfo?.SetValue(obj, value);
}

这样称呼它:

foreach (Control c in Controls)
{
    Set(c, "SelectedIndex", -1);
    Set(c, "Text", "");
    Set(c, "Checked", false);
}

关于c# - 有什么办法可以使这段代码更短？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/33441355/