如何在按钮单击甚至处理程序之间切换

Question

我正在创建一个添加/编辑用户的桌面应用程序。两个函数将使用相同的输入，但是每个函数都需要不同的单击处理程序来更新数据并将新数据插入我的数据库，但是我想使用相同的按钮

它们是我可以将不同的单击处理程序分配给同一按钮的一种方式吗？

Answer 1

是的，你可以，

//Register both handlers within constructor
button1.Click += new EventHandler(InsertOperationHandler);
button1.Click += new EventHandler(UpdateOperationHandler);

-

private void InsertOperationHandler(object sender, EventArgs e)
{
}

private void UpdateOperationHandler(object sender, EventArgs e)
{
}

Answer 2

我想出的解决方案如下：

public void displayEditButtons()
{
    buttonPeopleOne.Text = "Save Changes";
    this.buttonPeopleOne.Click -= new System.EventHandler(this.buttonPeopleOneClear_Click);
    this.buttonPeopleOne.Click += new System.EventHandler(this.buttonPeopleOneSave_Click);
        buttonPeopleTwo.Text = "Delete User";
        this.buttonPeopleTwo.Click -= new System.EventHandler(this.buttonPeopleTwoNext_Click);
        this.buttonPeopleTwo.Click += new System.EventHandler(this.buttonPeopleTwoDelete_Click);
        //change other controls to match the function context
        buttonPeopleChangeFunction.Visible = true;
        this.labelPeopleFunctionHeader.Text = "Edit Current User";
    }
    public void displayAddButtons()
    {
        buttonPeopleOne.Text = "Clear";
        this.buttonPeopleOne.Click -= new System.EventHandler(this.buttonPeopleOneSave_Click);
        this.buttonPeopleOne.Click += new System.EventHandler(this.buttonPeopleOneClear_Click);

        buttonPeopleTwo.Text = "Add Contact";
        this.buttonPeopleTwo.Click -= new System.EventHandler(this.buttonPeopleTwoDelete_Click);
        this.buttonPeopleTwo.Click += new System.EventHandler(this.buttonPeopleTwoNext_Click);
        //change other controls to match the function context
        buttonPeopleChangeFunction.Visible = false;
        this.labelPeopleFunctionHeader.Text = "Add New User";

}

当我需要更改按钮时，我只是调用不同的方法