c# 全选和批量修改

//全选
function checkAll(){
var items = document.getElementsByTagName("input");
for(var i =0;i<items.length;i++){
if(items[i].type == "checkbox" && items[i].id.indexOf("CheckBox1")>0){
items[i].checked = document.getElementById("ctl00_ContentPlaceHolder1_GridView1_ctl01_CheckBox3").checked;
}
}
}

function checkAlls(){
var items = document.getElementsByTagName("input");
for(var i =0;i<items.length;i++){
if(items[i].type == "checkbox" && items[i].id.indexOf("CheckBox2")>0){
items[i].checked = document.getElementById("ctl00_ContentPlaceHolder1_GridView2_ctl01_CheckBox4").checked;
}
}
}
//批量修改删除
string ids = "";
//遍历所有数据行
for (int i = 0; i < GridView1.Rows.Count; i++)
{
CheckBox chk = GridView1.Rows[i].FindControl("CheckBox1") as CheckBox;
if (chk.Checked)
{
//通过主键获取
ids +="'"+ GridView1.DataKeys[i].Value.ToString()+"'" + ",";
}
}
if (ids.Length == 0)
{
Response.Write("<script>alert('您没有选择!!!')</script>");
return;
}
else
{
//去掉最后逗号
ids = ids.Substring(0,ids.Length-1);
//访问数据库
SqlConnection conn = new SqlConnection("Data Source=.;Initial Catalog=GameCardSale;Integrated Security=True");
string sql = "Update UserInfo set UserRole=3 where UserId in ("+ids+")";
SqlCommand comm = new SqlCommand(sql,conn);
conn.Open();
int num = comm.ExecuteNonQuery();
conn.Close();
if (num > 0)
{
Response.Write("<script>alert('会员通过审核成功！！！')</script>");
}
else
{
Response.Write("<script>alert('网络繁忙！！请稍后再试！！！')</script>");
}
GridView1.DataBind();


}