DataGrid分页情况下删除当前页的最后一条数据并给删除添加确认框

private void dg_DSC_DeleteCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
{
string id=e.Item.Cells[1].Text;
string sql="delete CSD_PROMOTE_MAIN where PROMOTE_ID='"+id+"'";
try
{
DbManage.ExecuteNonQuery(sql);
int index=this.dg_DSC.CurrentPageIndex;
if((this.dg_DSC.PageCount-this.dg_DSC.CurrentPageIndex)==1 && this.dg_DSC.Items.Count==1)
{
if(this.dg_DSC.PageCount>1)
{
index=index-1;
}
else
{
index=0;
}
}
this.dg_DSC.CurrentPageIndex=index;
Response.Write("<script>alert('删除数据成功！');</script>");
dgBind();
}
catch
{
Response.Write("<script>alert('删除数据失败！请重试！');</script>");
}

}