使实时创建的按钮移动 [英] Make real-time created button move

问题描述

嗯，我已经实现了动态创建按钮控件的功能.

Well,i have implement a function to create button control dynamically.

private void CreateDynamicButton ()
{
    // Create a Button object
    Button dynamicButton = new Button();

    // Set Button properties
    dynamicButton.Height = 40;
    dynamicButton.Width = 300;
    dynamicButton.BackColor = Color.Red;
    dynamicButton.ForeColor = Color.Blue;
    dynamicButton.Location = new Point( 20  , 150 );
    dynamicButton.Text = "I am Dynamic Button";
    dynamicButton.Name = "DynamicButton";
    dynamicButton.Font = new Font( "Georgia" , 16 );

    // Add Event handler
    dynamicButton.Click += new EventHandler( DynamicButton_Click );
    dynamicButton.MouseDown += new EventHandler( DynamicButton_MouseDown );
    dynamicButton.MouseMove += new EventHandler( DynamicButton_MouseMove );
    // Add Button to the Form. Placement of the Button
    // will be based on the Location and Size of button
    Controls.Add( dynamicButton );
}

现在我要移动它，我决定实现以下内容:

Now i want to move it , i decide to implement the following:

private void DynamicButton_MouseDown ( object sender , MouseEventArgs e )
{
    x = e.X;
    y = e.Y;
}

在这里我有一个问题，因为发件人不能使用像Button1.Left这样的发件人...

Here i had a problem as sender cant use like Button1.Left etc...

private void DynamicButton_MouseMove ( object sender , MouseEventArgs e )
{
    if ( e.Button == MouseButtons.Left)
    {
        sender.Left = (sender.Left + e.X ) - x;
        sender.Top = (sender.Top + e.Y ) - y;
    }
}

我如何才能使上述代码正常工作?我需要动态创建未知数量的控件，并且需要使它们全部可移动.

How can i make the above code work?I need to dynamic create unknown numbers of control and i need to make them all moveable.

推荐答案

private void DynamicButton_MouseMove ( object sender , MouseEventArgs e )
{
    Button b = sender as Button;
    if (b != null)
    {
        if ( e.Button == MouseButtons.Left)
        {
            b.Left = (b.Left + e.X ) - x;
            b.Top = (b.Top + e.Y ) - y;
        }
    }
}

您犯了一些错误，这就是为什么您无法移动创建鼠标的原因. 1)

You have did some error that''s why you are not able to move your create mouse.
1)

// when your are using Move, Down Event handler given code syntax is not valid
// Use MouseEventHandler instead EventHandler
dynamicButton.MouseDown += new EventHandler( DynamicButton_MouseDown );
          dynamicButton.MouseMove += new EventHandler( DynamicButton_MouseMove )

2)

2)

// user dynamicButton.Left and dynamicButton.Top instead sender.Left or sender.Top
sender.Left = (sender.Left + e.X ) - x;
sender.Top = (sender.Top + e.Y ) - y;

您可以通过给定的方式恢复两个错误
要恢复第一个错误，请使用

you can recover your both error by given way
To Recover 1st error use

dynamicButton.MouseDown += new MouseEventHandler(dynamicButton_MouseDown);
            dynamicButton.MouseClick += new MouseEventHandler(dynamicButton_MouseClick);

对于第二个错误

and for 2nd Error

if (e.Button == MouseButtons.Left || e.Button == MouseButtons.Right)
            {
                dynamicButton.Left += e.Location.X - lp.X;
                dynamicButton.Top += e.Location.Y - lp.Y;
            }

:):)

:) :)

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