在ASp中datalist中嵌套一个checkbox，就是点击checkbox它下面对应的内容实现全选效果

//全选按钮
protected void CheckBox2_CheckedChanged(object sender, EventArgs e)
{
for (int i = 0; i <= GridView1.Rows.Count - 1; i++)
{
CheckBox cbox = (CheckBox)GridView1.Rows[i].FindControl("CheckBox11");

if (CheckBox2.Checked == true)
{
cbox.Checked = true;
Panel4.Visible = true;
}
else
{
cbox.Checked = false;
}
}

}道理一样，自己看看

protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
{
CheckBox checkBox;

for (Int32 i = 0; i < datalist1.Items.Count; i++)
{
checkBox = (CheckBox)datalist1.Items[i].FindControl("CheckBox1");
checkBox.Checked = true;
}
}