判断CheckBoxList至少选择一项
代码
protected void Button1_Click(object sender, EventArgs e)
{
if (CheckBoxList1.SelectedIndex==-1)
{
Response.Write("请至少选择一项!");
return;
}
}
{
if (CheckBoxList1.SelectedIndex==-1)
{
Response.Write("请至少选择一项!");
return;
}
}