gridview编辑之后更新不了
public partial class 输入成绩 : System.Web.UI.Page
{

protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
GridView1.DataBind();
}

}
//获取数据绑定在GV1上


protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
DataClassesDataContext ctx = new DataClassesDataContext();
var products = from p in ctx.stu_mark
where p.ID == (int)GridView1.SelectedValue
select p;

GridView1.DataSource = products;
GridView1.DataBind();

}
protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
{
GridView1.EditIndex = e.NewEditIndex;
GridView1.DataBind();

}
protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
DataClassesDataContext db = new DataClassesDataContext();

var strid = Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Value.ToString());
stu_mark ff = db.stu_mark.Single(b => b.ID == (strid));
ff.name = ((TextBox)GridView1.Rows[e.RowIndex].Cells[1].Controls[0]).Text;
ff.number = ((TextBox)GridView1.Rows[e.RowIndex].Cells[2].Controls[0]).Text;
ff.course = ((TextBox)GridView1.Rows[e.RowIndex].Cells[3].Controls[0]).Text;
ff.credit = ((TextBox)GridView1.Rows[e.RowIndex].Cells[4].Controls[0]).Text;
ff.mark = ((TextBox)GridView1.Rows[e.RowIndex].Cells[5].Controls[0]).Text;
db.SubmitChanges();
GridView1.EditIndex = -1;
GridView1.DataBind();
}
protected void Button1_Click(object sender, EventArgs e)
{
Response.Redirect("Login.aspx");
Response.End();
}
}

[解决办法]
db.SubmitChanges();
GridView1.EditIndex = -1;
GridView1.DataBind();

你都没重新取数据当然没更新的数据了，
[解决办法]
应该结贴！！！
[解决办法]

C# code

 if (!Page.IsPostBack)  {   //我没见过有人这么写数据绑定，这里应该写一个完整的数据绑定方法而不是单独的 GridView1.DataBind();   GridView1.DataBind();改为databind()；  }//比如下面是你绑定数据的完整方法public void databind(){   DataClassesDataContext ctx = new DataClassesDataContext();  var products = from p in ctx.stu_mark  where p.ID == (int)GridView1.SelectedValue  select p;  GridView1.DataSource = products;  GridView1.DataBind();}