C# 不执行动态添加的链接按钮单击事件

我在网格视图中动态添加了几个链接按钮，代码如下：

protected void gvTicketStatus_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            string compositeFiles = e.Row.Cells[3].Text;

            // split the string into individual files using delemeter "?"
            string[] fileSet = compositeFiles.Split('?');

            e.Row.Cells[3].Text = "";

            foreach (string str in fileSet)
            {
                if (str != null)
                {
                    // add a link button to the cell of the data grid.                                             

                    LinkButton lb = new LinkButton();
                    lb.Text = "Download File";
                    lb.ID = str; // str is file URL
                    lb.Click += new EventHandler(lbStatus_click);

                    e.Row.Cells[3].Controls.Add(lb);

                }
            }

        }
    }

在我的事件处理程序中，我已从ID读取URL，并将文件作为八位字节流下载

private void lbStatus_click(object sender, EventArgs e)
    {
        string fileName = ((Control)sender).ID;
        FileInfo file = new FileInfo(fileName);

        if (fileName != string.Empty && file.Exists)
        {
            Response.Clear();
            Response.AddHeader("Content-disposition", "attachment; filename=" + fileName.Substring(fileName.LastIndexOf("\\") + 1));
            Response.AddHeader("content-Length", file.Length.ToString());
            Response.ContentType = "application/octet-stream";
            Response.WriteFile(file.FullName);
            Response.Flush();
            Response.Close();
        } 

    }

private void RowCommand(object sender, GridViewCommandEventArgs e)
{
        string fileName = e.CommandArgument;
        FileInfo file = new FileInfo(fileName);

        if (fileName != string.Empty && file.Exists)
        {
            Response.Clear();
            Response.AddHeader("Content-disposition", "attachment; filename=" + fileName.Substring(fileName.LastIndexOf("\\") + 1));
            Response.AddHeader("content-Length", file.Length.ToString());
            Response.ContentType = "application/octet-stream";
            Response.WriteFile(file.FullName);
            Response.Flush();
            Response.Close();
        } 

    }

链接僵尸会很好地出现在网页中，但问题是当我点击它们时，页面会被刷新，什么也没有发生。事件处理程序代码永远不会执行

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这个问题与页面的回发有关吗？如果是，那么我如何解决它？

您需要使用网格视图的命令事件，并向CommandArgs属性添加所需的任何信息

编辑：添加示例

在我的事件处理程序中，我已从ID读取URL，并将文件作为八位字节流下载

private void lbStatus_click(object sender, EventArgs e)
    {
        string fileName = ((Control)sender).ID;
        FileInfo file = new FileInfo(fileName);

        if (fileName != string.Empty && file.Exists)
        {
            Response.Clear();
            Response.AddHeader("Content-disposition", "attachment; filename=" + fileName.Substring(fileName.LastIndexOf("\\") + 1));
            Response.AddHeader("content-Length", file.Length.ToString());
            Response.ContentType = "application/octet-stream";
            Response.WriteFile(file.FullName);
            Response.Flush();
            Response.Close();
        } 

    }

private void RowCommand(object sender, GridViewCommandEventArgs e)
{
        string fileName = e.CommandArgument;
        FileInfo file = new FileInfo(fileName);

        if (fileName != string.Empty && file.Exists)
        {
            Response.Clear();
            Response.AddHeader("Content-disposition", "attachment; filename=" + fileName.Substring(fileName.LastIndexOf("\\") + 1));
            Response.AddHeader("content-Length", file.Length.ToString());
            Response.ContentType = "application/octet-stream";
            Response.WriteFile(file.FullName);
            Response.Flush();
            Response.Close();
        } 

    }

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有关详细信息，请阅读

我以前在动态添加控件时多次看到这种行为。确保绑定datagrid的代码（反过来执行gvTicketStatus_RowDataBound事件）在每次页面回发之后运行。这需要发生，以便linkbutton控件在回发后保持其单击事件。

Hi ivowiblo，请详细说明一下好吗？感谢您的回复。运行时可能会捕获一些异常。您是否使用了try，catch？检查代码中是否存在异常。您还可以将访问说明符更改为protected，private也可以，但最好是protected，以防您需要将此事件用于另一个按钮。