将 Class 作为参数传递给图像点击事件处理程序

Question

我有一个 Trip 对象，它是从列表 TripsByTripIds 中获取的，我想将其作为参数传递给下方的图像点击事件处理程序。我该如何通过？

  foreach (Tripclass Trip in TripsByTripIds )
  {
      ImageButton imageButton = new ImageButton();
      imageButton.ImageUrl = "~/" +Trip.CorridorName+"/"+Trip.Time+"/"+Trip.ImgFileName;
      imageButton.Height = Unit.Pixel(100);
      imageButton.Style.Add("padding", "5px");
      imageButton.Width = Unit.Pixel(100);
      imageButton.Click += new ImageClickEventHandler(imageButton_Click);
      AMSPanel1.Controls.Add(imageButton);
      AMSPanel1.Height = Unit.Pixel(860);
  }

  protected void imageButton_Click(object sender, ImageClickEventArgs fi)
  {
      testimage.ImageUrl = ((ImageButton)sender).ImageUrl;
      lblTime.Text = Trip.Time; 
      lblLocation.Text = Trip.Location; //can't access trip object here
  }

Answer 1

如果它可以表示为文本，您可以将您的值添加到 CommandArgument 属性

Answer 2

我在 stack overflow 中的一个帖子中找到了答案，但另一个 day.i 还没有保存 link。但下面的解决方案解决了我的问题

  foreach (Tripclass Trip in TripsByTripIds )
  {
      ImageButton imageButton = new ImageButton();
      imageButton.ImageUrl = "~/" + Trip.CorridorName + "/" + Trip.Time + "/" + Trip.ImgFileName;
      imageButton.Height = Unit.Pixel(100);
      imageButton.Style.Add("padding", "5px");
      imageButton.Width = Unit.Pixel(100);
      imageButton.Click += new ImageClickEventHandler((a, b) => imageButton_Click(a, b,Trip));
      AMSPanel1.Controls.Add(imageButton);
      AMSPanel1.Height = Unit.Pixel(860);
  }

  protected void imageButton_Click(object sender, ImageClickEventArgs e, Tripclass Trip)
  {
      testimage.ImageUrl = ((ImageButton)sender).ImageUrl;
      lblTime.Text = Trip.Time; 
      lblLocation.Text = Trip.Location; //I can access trip object here
  }

将 Class 作为参数传递给图像点击事件处理程序

Passing Class as an argument to an image click event Handler

c#

asp.net

webforms