以编程方式将工具提示放在ListBox类上

Question

I have created an asp:listbox and in the cs file, I am trying to bind it to a datasource. However, I want to put in tooltips for each option so that when you hover over a multiple-listbox you will see the name of the item in both the listbox and the tooltip.

The following code is what I have tried (which obviously will not work), which will just put a big tooltip for the "select" html tag, instead of the "option" tags individually.

I think I need a loop, but I'm not sure how to add attributes to each element and the ASP documentation is no help. I bet it's an easy solution, but I can't figure out how to do it.

  LBRangeOfUsers.DataSource = GetSource();
  LBRangeOfUsers.DataValueField = "id";
  LBRangeOfUsers.DataTextField = "desc";
  LBRangeOfUsers.Attributes.Add("title", "desc");
  LBRangeOfUsers.DataBind();

I tried this:

  int i = 0;
  foreach (ListItem li in LBRangeOfUsers.Items)
  {
      LBRangeOfUsers.Items[i].Attributes.Add("title", li.Value);
      i++;
  }

Answer 1

It worked for me like this:

LBRangeOfUsers.DataSource = GetSource();
LBRangeOfUsers.DataBind();

foreach (ListItem item in LBRangeOfUsers.Items)
    item.Attributes["title"] = item.Value;

make sure the loop runs after the binding.

Answer 2

您是否尝试过循环LBRangeOfUsers.Items并为每个ListItem添加属性？