我知道一点PHP,但我假设$position是一个基于零的索引。如果不是,那么您将交换声明位置变量的两行代码。注释以“字符”开头。
'Request.Params accesses parameters from form posts, query string, etc.
Dim pairs = Request.Params("listItem").Split("&")
For i As Integer = 0 To pairs.Length - 1
Dim token = pairs(i)
Dim position = i.ToString()
'string position = (i + 1).ToString();
Dim id = Convert.ToInt32(token.Split("=")(1))
Dim sql = "UPDATE table SET position = " + position + " WHERE [id] = " + id.ToString()
'This line does the same thing, a bit more eloquently and efficiently
'Dim sql = String.Format("UPDATE table SET position = {0} WHERE [id] = {1}", position, id.ToString())
Next
我先用C语言做这个,因为我没注意到你说的是vb.net。这是C版。我想我还是把它放进去吧。
我把这句话写得有点冗长,是为了说明C的一些细微之处,同时也为了清晰起见。
// Request.Params accesses parameters from form posts, query string, etc.
string[] pairs = Request.Params["listItem"].Split('&');
for (int i = 0; i < pairs.Length; i++)
{
string token = pairs[i];
string position = i.ToString();
// string position = (i + 1).ToString();
int id = Convert.ToInt32(token.Split('=')[1]);
string sql = "UPDATE table SET position = " + position + " WHERE [id] = " + id;
// This line does the same thing, a bit more eloquently and efficiently
//string sql = String.Format("UPDATE table SET position = {0} WHERE [id] = {1}", position, id.ToString());
}