我想提供上传多个文件然后下载的选项。我正在动态创建链接按钮,例如:
private void AddLinkButtons()
{
string[] fileNames = (string[])Session["fileNames"];
string[] fileUrls = (string[])Session["fileUrls"];
if (fileNames != null)
{
for (int i = 0; i < fileUrls.Length - 1; i++)
{
LinkButton lb = new LinkButton();
phLinkButtons.Controls.Add(lb);
lb.Text = fileNames[i];
lb.CommandName = "url";
lb.CommandArgument = fileUrls[i];
lb.ID = "lbFile" + i;
//lb.Click +=this.DownloadFile;
lb.Attributes.Add("runat", "server");
lb.Click += new EventHandler(this.DownloadFile);
////lb.Command += new CommandEventHandler(DownloadFile);
phLinkButtons.Controls.Add(lb);
phLinkButtons.Controls.Add(new LiteralControl("<br>"));
}
}
我的DownloadFile事件是:
protected void DownloadFile(object sender, EventArgs e)
{
LinkButton lb = (LinkButton)sender;
string url = lb.CommandArgument;
System.IO.FileInfo file = new System.IO.FileInfo(url);
if (file.Exists)
{
try
{
Response.Clear();
Response.AddHeader("Content-Disposition", "attachment; filename=" + file.Name);
Response.AddHeader("Content-Length", file.Length.ToString());
Response.ContentType = "application/octet-stream";
Response.WriteFile(file.FullName);
Response.End();
}
catch (Exception ex)
{
}
}
else
{
Response.Write("This file does not exist.");
}
}
我在屏幕上看到链接按钮,但单击后再未调用DownloadFile事件。我尝试了所有已评论的选项,但无法正常工作。代码有什么问题?
最佳答案
在何处以及何时调用AddLinkButtons()?
每次回发时,应在页面初始化期间调用它。
根据页面的逻辑,您的OnInit看起来应该像这样
protected override void OnInit(EventArgs e)
{
base.OnInit(e);
AddLinkButtons();
}
关于c# - 动态创建的链接按钮上的Click事件不起作用,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/10042078/