使用 LinQ 到 SQL 搜索栏

Question

Please could someone help me with this problem? I am trying to do a search form. everything works fine, but I type a username it shows me the result of the username that I typed, however, when I enter an ID or name it shows me the whole table

 protected void btnsearch_Click(object sender, EventArgs e) { var st = from i in db.Login1s where i.ID.Contains(TxtID.Text) select new {ID = i.ID, Name = i.Name, Username = i.Username, Password = i.Password}; GridView1.DataSource = st.ToList(); GridView1.DataBind(); var na = from n in db.Login1s where n.Name.Contains(TxtName1.Text) select new { ID = n.ID, Name = n.Name, Username = n.Username, Password = n.Password }; GridView1.DataSource = na.ToList(); GridView1.DataBind(); var us = from u in db.Login1s where u.Username.Contains(TxtUsername.Text) select new { ID = u.ID, Name = u.Name, Username = u.Username, Password = u.Password }; GridView1.DataSource = us.ToList(); GridView1.DataBind(); } } }

Answer 1

You are effectively binding only the last datasource to your view. Combine your Linq statements in one by using && in your where condition.

where i.ID.Contains(TxtID.Text) && i.Name.Contains(TxtName1.Text) …