修改后的代码

Question

我有以下C＃

protected void add_button_Click(object sender, EventArgs e)
{
    string teamname = team_name_tb.Text;
    string teamstatus = "Not Started";
    string teamnotes = team_notes_tb.Text;
    string sprintid = sprint_select.SelectedValue;

    string ConnectionString = WebConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
    SqlConnection myConnection = new SqlConnection(ConnectionString);

    myConnection.Open();

            String query = "INSERT INTO teams (team_name, status, notes) 
                            VALUES (@team_name, @status, @notes); 
                            INSERT INTO sprints_vs_teams (sprint_id, team_id)                    
                            VALUES (@sprint_id, @team_id)";

            SqlCommand myCommand = new SqlCommand(query, myConnection);
            myCommand.Parameters.AddWithValue("@team_name", teamname);
            myCommand.Parameters.AddWithValue("@status", teamstatus);
            myCommand.Parameters.AddWithValue("@notes", teamnotes);
            myCommand.Parameters.AddWithValue("@sprint_id", sprintid);
            myCommand.Parameters.AddWithValue("@team_id", ????);

            myCommand.ExecuteNonQuery();
            myConnection.Close();
}

在teams表中，主键为team_id我希望能够提取此值并将其插入查询表中的team_id字段sprints_vs_teams 1}}。有没有这样做的方法，如果可以的话，你可以提供一些指导，请注意我对C＃很新。任何帮助将不胜感激。

修改后的代码

protected void add_button_Click(object sender, EventArgs e)
{
    String user = Session["user_id"].ToString();
    string teamname = team_name_tb.Text;
    string teamstatus = "Not Started";
    string teamnotes = team_notes_tb.Text;
    string sprintid = sprint_select.SelectedValue;

string ConnectionString = WebConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
SqlConnection myConnection = new SqlConnection(ConnectionString);

myConnection.Open();

String query = "Declare @team_identity int INSERT INTO teams (team_name, status, notes) VALUES (@team_name, @status, @notes); set @team_identity = scope_identity() INSERT INTO sprints_vs_teams (sprint_id, team_id) VALUES (@sprint_id, @team_identity)";

       SqlCommand myCommand = new SqlCommand(query, myConnection);
        myCommand.Parameters.AddWithValue("@team_name", teamname);
        myCommand.Parameters.AddWithValue("@status", teamstatus);
        myCommand.Parameters.AddWithValue("@notes", teamnotes);
        myCommand.Parameters.AddWithValue("@sprint_id", sprintid);

        myCommand.ExecuteNonQuery();
        myConnection.Close();
}

我用@Sick的答案修改了我的代码，但它似乎没有用。如果有人可以就我可能出错的地方提出建议，我们将不胜感激。

Answer 1

使用SCOPE_IDENTITY

Declare @team_identity int

INSERT INTO teams (team_name, status, notes) 
                            VALUES (@team_name, @status, @notes);

set @team_identity = scope_identity()

INSERT INTO sprints_vs_teams (sprint_id, team_id)                    
                            VALUES (@sprint_id, @team_identity)"

Answer 2

如果我没弄错，你必须将team_identity声明为cmd.parameter。当然没有传递进入它的参数c＃仍然期待一个

cmd.paramater.addwithvalue("@team_identity", paramaterDirection.out);

或类似的东西

Answer 3

在teams表中插入一行后，编写以下代码以获取身份的当前值，并在插入sprints_vs_teams表时使用它。

SqlCommand cmd=new SqlCommand("select Ident_current('teams')",Cn);
Cn.Open();
int teamid=int.Parse(Cmd.ExecuteScalar().ToString());

希望有所帮助

从SQL插入查询中获取新记录主键ID以将相同值插入另一个表中？

修改后的代码

3 个答案: