我们可以在鼠标点击事件中使用参数c＃ [英] Can we use parameter in mouse click event c#

问题描述

我使用循环用于二维数组的按钮。我不知道如何知道阵列中哪些按钮被点击了

这是我的代码：

< （int i = 0; i <100; i ++）
{
for（int j = 0; j< 100; i ++）
{
arrButton [i，j] = new Button（）;
arrButton [i，j] .Size = new Size（size1button，size1button）;
arrButton [i，j] .Location = new Point（j * size1button，i * size1button）;
arrButton.Click + = new EventHandler（arrButton_Click）;
}
}

可以使用参数i，j进行鼠标点击事件喜欢：

  private void arrButton_Click（object sender，EventArgs e，int i，int j）
 {
 //我的想法：将i，j添加到另一个int [，]数组以跟踪被点击的按钮
} 
  

如果退出，如何正确写？或者您可以推荐或方法来确切了解数组中按钮的位置？

解决方案

您不能将EventHandler签名更改为包含你的我和 j 。

但是，你可以从已经传递给 arrButton_Click 方法的信息获取该信息。由于您将每个按钮的位置设置为 new Point（j * size1button，i * size1button），您可以获得每个 i size1button 。

，c>和 j

要获得该位置，您可以使用发件人，这是您的 Button （a必须）：

  private void arrButton_Click（object sender，EventArgs e）
 {
按钮btnClicked =（按钮）发件人; 
 int i = btnClicked.Location.Y / size1button; 
 int j = btnClicked.Location.X / size1button; 
} 
  

---

另外，代码你目前用于创建按钮有几个错误。

首先，你永远不会增加 j ;第二个循环 i ++ 。

其次，如果您希望按钮出现，您必须将其添加到窗体的控件中。

最后，我不认为您的表单上可以有10 000个活动按钮，请尝试较少的数字，例如25。

所以修正后的代码如下所示：

  for（int i = 0; i <5; i ++）
 {
 for（int j = 0; j< 5; j ++）
 {
 arrButton [i，j] = new Button（） 
 
 arrButton [i，j] .Size = new Size（size1button，size1button）; 
 arrButton [i，j] .Location = new Point（j * size1button，i * size1button）; 
 arrButton [i，j] .Click + = arrButton_Click; 
 Controls.Add（arrButton [i，j]）; 
} 
} 
  

您还可以注意到，我删除了您的新的EventHandler ，这是多余的。

I use the loop for a two dimensions array of buttons. I don't know how to know exactly which buttons in array were clicked or not

Here are my code:

 for (int i = 0; i < 100 ; i++)
        {
            for (int j=0 ; j< 100; i++)
            {
                arrButton[i, j] = new Button();
                arrButton[i,j].Size = new Size(size1button, size1button);
                arrButton[i,j].Location = new Point(j*size1button, i*size1button);
                arrButton.Click += new EventHandler(arrButton_Click);
            }
        }

Can I use parameters i, j for mouse click event like:

     private void arrButton_Click(object sender, EventArgs e, int i, int j)
       {
         //my idea : add i, j to another int[,] array to keep track of buttons which were clicked
       }

If this exits, how to write it correctly? Or can you recommend or method to know exactly where the button was clicked in array ?

解决方案

You cannot change the EventHandler signature to include your i and j.

However, you can get that information from what is already passed to the arrButton_Click method. Since you set the location of each button as new Point(j*size1button, i*size1button), you can get each i and j component back by dividing the location of your button by size1button.

To get that location, you can use the sender, which is your Button (a cast is necessary):

private void arrButton_Click(object sender, EventArgs e)
{
    Button btnClicked = (Button) sender;
    int i = btnClicked.Location.Y / size1button;
    int j = btnClicked.Location.X / size1button;
}

---

Also, the code you're currently using to create the buttons have a couple errors.

First, you're never incrementing j; the second loop does i++.

Second, if you want your buttons to appear, you have to add them to your Form's Controls.

Finally, I don't think you can have 10 000 active buttons on your form, try a lower number, like 25.

So the corrected code would look like:

for (int i = 0; i < 5; i++)
{
    for (int j = 0; j < 5; j++)
    {
        arrButton[i, j] = new Button();

        arrButton[i, j].Size = new Size(size1button, size1button);
        arrButton[i, j].Location = new Point(j*size1button, i*size1button);
        arrButton[i, j].Click += arrButton_Click;
        Controls.Add(arrButton[i,j]);
    }
}

You can also notice that I removed your declaration of new EventHandler, which was redundant.

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