如何为动态生成的Button添加EventHandler

Question

This is very similar to these questions, but they didn't seem to help me (will explain why below): 这与这些问题非常相似，但它们似乎对我没有帮助（将在下面解释原因）：

How to create an onClick eventHandler for a dynamically created button 如何为动态创建的按钮创建onClick eventHandler
asp.net dynamically button with event handler asp.net动态按钮与事件处理程序
asp:Button Click event not being fired asp：Button Click事件未被触发

I'm creating a C# aspx page. 我正在创建一个C＃aspx页面。 That page grabs a bunch of data and then builds a table out of it. 该页面抓取了大量数据，然后构建了一个表格。 One of the columns in the table contains a button that gets dynamically created as it builds the data (since the button's action relies on the data in the table). 表中的一列包含一个在构建数据时动态创建的按钮（因为按钮的操作依赖于表中的数据）。

Default.aspx Default.aspx的

<body>
  <form id="form1" runat="server">
    <div>
      <asp:Table ID="tblData" runat="server"></asp:Table>
    </div>
  </form>
</body>

Defafult.aspx.cs Defafult.aspx.cs

protected void Page_Load(object sender, EventArgs e)
    {
        Build_Table();
    }

protected void Build_Table()
    {
        //create table header row and cells
        TableHeaderRow hr_header = new TableHeaderRow();
        TableHeaderCell hc_cell = new TableHeaderCell();
        hc_cell.Text = "This column contains a button";
        hr_header.Cells.Add(hc_cell);
        tblData.Rows.Add(hr_header);

        //create the cell to contain our button
        TableRow row = new TableRow();
        TableCell cell_with_button = new TableCell();

        //create the button
        Button btn1 = new Button();
        btn1.Click += new EventHandler(this.btn1_Click);

        //add button to cell, cell to row, and row to table
        cell_with_button.Controls.Add(btn1);
        row.Cells.Add(cell_with_button);
        tblData.Rows.Add(row);
    }

protected void btn1_Click(Object sender, EventArgs e)
    {
        //do amazing stuff
    }

Here's where I'm tripping up. 这是我绊倒的地方。 I understand that my EventHandler isn't being fired because it needs to be moved over to the Page_Load method. 我知道我的EventHandler没有被触发，因为它需要转移到Page_Load方法。 However, if I move the btn1 creation and EventHandler over to Page_Load, I can no longer access them in Build_Table! 但是，如果我将btn1创建和EventHandler移动到Page_Load，我将无法再在Build_Table中访问它们！

All of the code examples I see either have btn1 statically added in the ASPX page, or have it dynamically created in Page_Load. 我看到的所有代码示例都在ASPX页面中静态添加了btn1，或者在Page_Load中动态创建它。 What's the best way to do what I'm trying to accomplish? 做我想要完成的事情的最佳方法是什么？

Answer 1

Create your buttons with an ID before you bind the event: 在绑定事件之前使用ID创建按钮：

Button btn1 = new Button();
btn1.ID = "btnMyButton";
btn1.Click += new EventHandler(this.btn1_Click);

Make sure every button has an unique ID. 确保每个按钮都有唯一的ID。 Also, I would personally move the code to Page_Init instead of Page_Load . 另外，我个人会将代码移到Page_Init而不是Page_Load 。

如何为动态生成的Button添加EventHandler

问题描述

1 个解决方案

解决方案1
5 已采纳 2013-06-21 22:53:21

如何为动态生成的Button添加EventHandler

问题描述

1 个解决方案

解决方案1 5 已采纳 2013-06-21 22:53:21

解决方案1
5 已采纳 2013-06-21 22:53:21