哪种方法是清除文本框值的最佳方法？ [英] Which method is best way to clear the textbox values?

问题描述

方法1：



public void ClearControlValues（）

{

txtHolidayDate.Text = string。空;

txtHolidayName.Text = string.Empty;

txtHolidayDescription.Text = string.Empty;

}



方法2：



public void ClearControlValues（）

{

txtHolidayDate.Text = txtHolidayName.Text = txtHolidayDescription.Text = string.Empty;

}



我尝试了什么：

哪种方法是清除文本框值的最佳方法

解决方案

这是一个风格问题。如果您的雇主没有已发布的编码样式：



0）如果您正在编辑现有文件，请使用该文件中使用的样式。 br />


1）如果它是你正在创建的新文件，请按照你喜欢的方式进行。



就个人而言，我更喜欢每行一个作业，但那就是我。

我同意约翰。这两个版本编译成大致相同的IL，所以这只是一个偏好问题。



看看方法二，你可能会期望它做类似的事情：

 txtHolidayDescription.Text =  string  .Empty; 
 txtHolidayName.Text = txtHolidayDescription.Text; 
 txtHolidayDate.Text = txtHolidayName.Text; 

但是如果你检查编译的IL，你会看到属性 get 永远不会调用访问者。相反，你只需得到：

 txtHolidayDescription.Text =  string  .Empty; 
 txtHolidayName.Text =  string  .Empty; 
 txtHolidayDate.Text =  string  .Empty; 

您可以使用简单的类演示：

  public   class  Foo 
 {
  public   string 文字
 {
  get  { throw   new  InvalidOperationException（ 嘘！）; } 
  set  {} 
} 
} 
 
  static   class 计划
 {
  static   void  Main（）
 {
 Foo x =  new  Foo（）; 
 Foo y =  new  Foo（）; 
 Foo z =  new  Foo（）; 
 
 x.Text = y.Text = z.Text =   Hello; 
 Console.WriteLine（  Hooray！）; 
} 
} 

运行该代码时，不会抛出任何异常，这表明不会调用 get 访问器。 / BLOCKQUOTE>

Method 1 :

public void ClearControlValues()
{
txtHolidayDate.Text = string.Empty;
txtHolidayName.Text = string.Empty;
txtHolidayDescription.Text = string.Empty;
}

Method2:

public void ClearControlValues()
{
txtHolidayDate.Text = txtHolidayName.Text = txtHolidayDescription.Text = string.Empty;
}

What I have tried:

Which method is best way to clear the textbox values

解决方案

It's a matter of style. If your employer doesn't have a published coding style:

0) If you're editing an existing file, use the style that is used in that file.

1) If it's a new file that you're creating, do it the way that you prefer.

Personally, I prefer one assignment per line, but that's me.

I agree with John. Both versions compile to roughly the same IL, so it's just a matter of preference.

Looking at method two, you might expect it to do something like:

txtHolidayDescription.Text = string.Empty;
txtHolidayName.Text = txtHolidayDescription.Text;
txtHolidayDate.Text = txtHolidayName.Text;

But if you examine the compiled IL, you'll see that the property get accessor is never called. Instead, you simply get:

txtHolidayDescription.Text = string.Empty;
txtHolidayName.Text = string.Empty;
txtHolidayDate.Text = string.Empty;

You can demonstrate this with a simple class:

public class Foo
{
    public string Text
    {
        get { throw new InvalidOperationException("Boo!"); }
        set { }
    }
}

static class Program
{
    static void Main()
    {
        Foo x = new Foo();
        Foo y = new Foo();
        Foo z = new Foo();
        
        x.Text = y.Text = z.Text = "Hello";
        Console.WriteLine("Hooray!");
    }
}

Running that code, no exception is thrown, which demonstrates that the get accessor is not called.

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