C#将一个方法作为参数传递给另一个方法 [英] C# Passing a method as a parameter to another method

问题描述

我有一个在发生异常时调用的方法:

I have a method that is called when an exception occurs:

public void ErrorDBConcurrency(DBConcurrencyException e)
{
    MessageBox.Show("You must refresh the datasource");
}

我想做的就是将此函数传递给方法，因此，如果用户单击是"，则该方法称为例如.

What i would like to do is pass this function a method so if the user clicks Yes then the method is called e.g.

public void ErrorDBConcurrency(DBConcurrencyException e, something Method)
{
    if (MessageBox.Show("You must refresh the datasource") == DialogResult.OK)
        Method();
}

如果有这种情况，我也想传递参数，则该方法可能有也可能没有参数.

The Method may or may not have parameters, if this is the case i would like to pass them too.

我该如何实现?

推荐答案

您可以使用

You can use the Action delegate type.

public void ErrorDBConcurrency(DBConcurrencyException e, Action method)
{
    if (MessageBox.Show("You must refresh the datasource") == DialogResult.OK)
        method();
}

然后您可以像这样使用它:

Then you can use it like this:

void MyAction()
{

}

ErrorDBConcurrency(e, MyAction); 

如果确实需要参数，则可以使用lambda表达式.

If you do need parameters you can use a lambda expression.

ErrorDBConcurrency(e, () => MyAction(1, 2, "Test")); 

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