Question

我尝试了数百万种方法来使范围标识工作。它只是返回__Page !!

Query = "INSERT INTO seekers(name,sname,lname,status,gender,dob,major,experince,email,password,phone,valid,city) values(@name,@sname,@lname,@status,@gender,@dob,@major,@exp,@email,@password,@phone,0,@city);SELECT SCOPE_IDENTITY();";

// setting up command definition
Command = new SqlCommand(Query, Connection);

// setting up command parameters
Command.Parameters.AddWithValue("email", txt_email.Text);
Command.Parameters.AddWithValue("gender", lst_gender.SelectedValue);
Command.Parameters.AddWithValue("status", lst_status.SelectedValue);
Command.Parameters.AddWithValue("phone", long.Parse("968" + txt_phone.Text));
Command.Parameters.AddWithValue("password", txt_password.Text);
Command.Parameters.AddWithValue("exp", lst_exp.SelectedValue);
Command.Parameters.AddWithValue("city", lst_exp.SelectedValue);
Command.Parameters.AddWithValue("major", lst_major.SelectedValue);
Command.Parameters.AddWithValue("name", txt_name.Text);
Command.Parameters.AddWithValue("sname", txt_sname.Text);
Command.Parameters.AddWithValue("lname", txt_lname.Text);
Command.Parameters.AddWithValue("dob", cld_birth.SelectedDate);

int ID = (int)Command.ExecuteScalar();

Answer 1

尝试参数如下......

Query = "INSERT INTO seekers(name,sname,lname,status,gender,dob,major,experince,email,password,phone,valid,city) values(@name,@sname,@lname,@status,@gender,@dob,@major,@exp,@email,@password,@phone,0,@city);SET @ID=SCOPE_IDENTITY();"

//Your Parameters..
SqlParameter ID=new SqlParameter();
ID.Name="@ID";
ID.Direction=ParameterDirection.Output;
Command.Parameters.Add(ID);
Command.ExecuteNonQuery();
int id=(int)ID.Value;

或尝试投射输出如下......

 Query = "INSERT INTO seekers(name,sname,lname,status,gender,dob,major,experince,email,password,phone,valid,city) values(@name,@sname,@lname,@status,@gender,@dob,@major,@exp,@email,@password,@phone,0,@city);SELECT CAST(scope_identity() AS int);"

 int id= (Int32)Command.ExecuteScalar();

Answer 2

SCOPE_IDENTITY将返回小数，请尝试：

int ID = (int) (decimal) Command.ExecuteScalar();

你的意思不太清楚：

只是返回__Page !!

据推测，发布的代码会抛出异常，这会导致某些更高级别的代码执行“...返回__Page”的任何操作。

如果查看异常详细信息，您会发现更多有关发生的事情：我怀疑是InvalidCastException，因为您正在尝试将Command.ExecuteScalar返回的对象（一个盒装小数）转换为一个int。

Answer 3

使用set nocount off并尝试

As First execute语句是插入返回值是受影响的记录数

Scope_Identity有什么问题？

3 个答案: