如何为下拉列表添加工具提示? | 如何为下拉列表添加工具提示

本文介绍了如何为下拉列表添加工具提示?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

如何为下拉列表添加工具提示...其中包含来自后端的数据....

这是我正在使用的代码

Hi,

how to add ToolTip for drop down list... which contain data from backend....

this is the code i am using

private void AttachTooltipForDropdowns(DropDownList ddlTarget)
{
    for (int i = 0; i < ddlTarget.Items.Count; i++)
    {
        ddlTarget.Items[i].Attributes.Add("title", ddlTarget.Items[i].Text);
    }
}
<br />
protected void Page_Prerender(object sender, EventArgs e)
{
    AttachTooltipForDropdowns(ddlf1);
    AttachTooltipForDropdowns(ddlf2);
}

ddlf1，ddlf2是ddl的ID，但不起作用.

有价值的建议和解决方案... plz

ddlf1,ddlf2 are the ID ''s of the ddl, but it is not working.

valuable suggestion and solutions... plz

推荐答案

private void AttachTooltipForDropdowns(ref DropDownList ddlTarget)
{
    for (int i = 0; i < ddlTarget.Items.Count; i++)
    {
        ddlTarget.Items[i].Attributes.Add("title", ddlTarget.Items[i].Text);
    }
}

protected void Page_Prerender(object sender, EventArgs e)
{
    AttachTooltipForDropdowns(ref ddlf1);
    AttachTooltipForDropdowns(ref ddlf2);
}

protected void Page_InitComplete(object sender, EventArgs e)
{
drp.PreRender += new EventHandler(DropDown_PreRender);
}

 public void DropDown_PreRender(object sender, EventArgs e)
        {
            DropDownList ddl = sender as DropDownList;
            if (ddl != null)
            {
                foreach (ListItem li in ddl.Items)
                {
                    // setting text value of item as tooltip
                    li.Attributes.Add("title", li.Text);
                }
            }
        }
  {

这篇关于如何为下拉列表添加工具提示?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！