Question

您好我提交了一个表单进行访问，但希望在我提交后，在文本框中显示访问分配的自动编号。在我的下面，任何建议都会很棒！

string cmdstr = "Insert into  TaskPerformed(TaskType,OtherType,Analyst,DateCompleted)Values(@b,@c,@d,@e)";
string query2 = "Select @@IDENTITY";

OleDbConnection con1 = new OleDbConnection(constr);
OleDbCommand com = new OleDbCommand(cmdstr, con1);
OleDbCommand cmdNewID = new OleDbCommand("SELECT @@IDENTITY", con1);//

con1.Open();

cmd.CommandText = query2;
com.ExecuteNonQuery();
con1.Close();

label16.Text = cmdNewID.ToString();

Answer 1

看起来您遇到的问题是因为您没有执行第二个命令...而且您在使用之前关闭了连接

using(OleDbCommand cmdNewID = new OleDbCommand("SELECT @@IDENTITY", con1))
{
    con1.Open();

    cmd.CommandText = query2;
    com.ExecuteNonQuery();

    label16.Text = cmdNewID.ExecuteScalar();
}

C＃get access 2010 autonumber

1 个答案: