如何在MasterPage中有一个按钮并在内容页面中以不同的方式使用

Question

I have a button in my MasterPage:

<asp:Button ID="tyt" runat="server" ClientIDMode="Static" OnClick="tyt_Click" UseSubmitBehavior="false" Text="SUBMIT A MESSAGEBOX" />

I want to use the button to do different thing in different pages.

I added the following in my MasterPage:

public void tyt_Click(object sender, EventArgs e)
        {
            OnMasterControlClick(e);
        }
        protected void OnMasterControlClick(EventArgs e)
        {
            if (this.MasterControlClicked != null)
            {
                this.MasterControlClicked(this, e);
            }
        }

The following in page1.aspx:

protected override void OnInit(EventArgs e)
        {
            base.OnInit(e);

            if (this.Master is Site)
            {
                ((Site)this.Master).MasterControlClicked += new EventHandler(ContentControlClicked);
            }
        }
        private void ContentControlClicked(object sender, EventArgs e)
        {
            MessageBox.Show("your task");
        }

The following in page2.aspx:

protected override void OnInit(EventArgs e)
        {
            base.OnInit(e);

            if (this.Master is Site)
            {
                ((Site)this.Master).MasterControlClicked += new EventHandler(ContentControlClicked);
            }
        }
        private void ContentControlClicked(object sender, EventArgs e)
        {
            MessageBox.Show("your task");
        }

Only Your task is displayed if I am on page1.aspx but when I am on page2.aspx and I press the button, the page just reloads.

How do I fix it?

Answer 1

This can be solved using an interface. Create an interface that defines the action or actions you need.

public interface IActionPage
{
    void Action();
}

Then have each of your pages implement the interface.

public partial class _Default : System.Web.UI.Page, IActionPage
{ 
    protected void Page_Load(object sender, EventArgs e)
    {
    }

    public void Action()
    {
        MessageBox.Show("your task");
    }
}

Finally, have the master page's button cast the current page to the interface and then invoke the method.

protected void tyt_Click(object sender, EventArgs e)
{
    var ActionPage = this.Page as IActionPage;
    if (ActionPage != null)
        ActionPage.Action();
}

Answer 2

another way of adding event handler is using delegate Action<> or Func<> for handler

in Master page.

public Action MyButtonCallBack {get; set;}

in Child page.

protected override void OnInit(EventArgs e)
{
    base.OnInit(e);
    if (this.Master is Site)
    {
        ((Site)this.Master).MyButtonCallBack = DoSomething;
    }
}

private void DoSomething() 
{
    //...
}