protected void gv_IsPopular_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
LinkButton up =e.Row.FindControl("linkbtn_Up") as LinkButton;
LinkButton down = e.Row.FindControl("linkbtn_down") as LinkButton;
if (whetherLine == 1)
{
up.Enabled = false;
}
whetherLine++;
if (whetherLine == a.Rows.Count)
{
down.Enabled = false;
}
}
}
提示： if (whetherLine == 1)
{
up.Enabled = false; 未将对象引用设置到对象的实例
}
------解决方案--------------------------------------------------------
没获取到。
------解决方案--------------------------------------------------------
LinkButton up =e.Row.FindControl("linkbtn_Up") as LinkButton;
--
看看是不是ID写错了
------解决方案--------------------------------------------------------
不要写在RowDataBound事件里，建议在绑定完GridView之后添加以下代码：
- C# code
foreach(GridViewItem gvi in this.gv_IsPopular.Items){LinkButton up = (LinkButton)gvi.FindControl("linkbtn_Up"); LinkButton down = (LinkButton)gvi.FindControl("linkbtn_down"); if (whetherLine == 1) { up.Enabled = false; } whetherLine++; if (whetherLine == gvi.Count) { down.Enabled = false; } }
------解决方案--------------------------------------------------------
linkbtn_Up是在ItemTemplate还是EditItemTemplate中的，如果是在EditItemTemplate中，楼主这样得不到
------解决方案--------------------------------------------------------
把代码帖完整
linkbtn_Up是在ItemTemplate还是EditItemTemplate中
------解决方案--------------------------------------------------------
LinkButton up =e.Row.FindControl("linkbtn_Up") as LinkButton;
up肯定没有找到，最好在使用之前判断一下是否null然后再处理
否则就会"未将对象引用设置到对象的实例 "
------解决方案--------------------------------------------------------
把ASPX 页代码贴一下
顺便把代码也改一下
- C# code
LinkButton up =e.Row.FindControl("linkbtn_Up") as LinkButton; LinkButton down = e.Row.FindControl("linkbtn_down") as LinkButton; if (whetherLine == 1) { if(up!=null) up.Enabled = false; } whetherLine++; if (whetherLine == a.Rows.Count) { if(down!=null) down.Enabled = false; }