NorthwindDBDataContext dc = new NorthwindDBDataContext();
protected void Page_Load(object sender, EventArgs e)
{
if (IsPostBack)
return;
Bind();
}
/// <summary>
/// 绑定数据
/// </summary>
private void Bind()
{
GridView1.DataSource = dc.Users;
GridView1.DataBind();
}
/// <summary>
/// 添加
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void Button1_Click(object sender, EventArgs e)
{
//把需要的值存起来
string name = TextBox1.Text;
string pass = TextBox2.Text;
bool sex = CheckBox1.Checked;
Users user = new Users() { UserName = name, UserPwd = pass, Sex = sex }; //初始化一个用户类
dc.Users.InsertOnSubmit(user); //提交数据
//List<Users> list = new List<Users>() { user };//生成一个用户集合
//dc.Users.InsertAllOnSubmit(list); //提交数据
dc.SubmitChanges(); //对数据库进行修改
Bind();
}
/// <summary>
/// 删除
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
//把需要删除的ID找到
string id = GridView1.DataKeys[e.RowIndex].Value.ToString(); //ID进行过绑定
① var result = from u in dc.Users
where u.ID.ToString() == id
select u; //把需要删除的行先找出来
dc.Users.DeleteAllOnSubmit(result); //删除多行 result 就是一个集合
//dc.Users.DeleteOnSubmit(result.First()); 删除单行
dc.SubmitChanges(); //跟新数据库
Bind();
}
①=var result = dc.Users.Where((x) => x.ID.ToString() == id); //相当于LINQ语句查询 确定是那张表where里面接Lambda表达式
修改一般都是拿到数据到别的页面进行修改，然后再提交到数据库 更新超链接定位此网页 tt.aspx?id={0} 把ID传过来
NorthwindDBDataContext dc = new NorthwindDBDataContext();
protected void Page_Load(object sender, EventArgs e)
{
if (IsPostBack)
return;
string id = Request.QueryString["id"].ToString(); //拿到需要修改行的ID
Users user = dc.Users.Where((x) => x.ID.ToString() == id).First(); //拿到需要修改的那行数据
TextBox1.Text = user.UserName;
TextBox2.Text = user.UserPwd;
CheckBox1.Checked = user.Sex;
}
protected void Button1_Click(object sender, EventArgs e)
{
string id = Request.QueryString["id"].ToString();
Users user = dc.Users.Where((x) => x.ID.ToString() == id).First(); //找到需要修改行，进行修改
user.UserName = TextBox1.Text;
user.UserPwd = TextBox2.Text;
user.Sex = CheckBox1.Checked;
dc.SubmitChanges();
Response.Redirect("test.aspx"); //再回原来的页面
}