此代码返回一个错误，指出“没有为一个或多个必需参数提供值”

Question

private void button9_Click(object sender, EventArgs e)
{
    clss.Connect();
    clss.search("select * from Employee E, AssetAllocation A WHERE E.EmployeeID=6 and A.EmployeeID=6");
    //, where E.EmployeeID=" + textBox12.Text + " and A.EmployeeID=" + textBox12.Text + "");
    while (clss.reader.Read())
    {
        textBox11.Text = clss.reader["Department"].ToString();
        textBox10.Text = clss.reader["Emp_Name"].ToString();
        textBox9.Text = clss.reader["OfficeNumber"].ToString();
        listBox1.Items.Add(clss.reader["AllocationDate"].ToString());
    }

    clss.reader.Close();
}

Answer 1

Please clarify what clss exactly is... Otherwise my only solution is doing this:

Make sure you are not missing any parameters for example:

public class Employee {
    public Employee(string Name) {
       // Some Code Here
    }
}

To me clss looks like that but not named Employee and most likely has different arguments. So for the example below it shows that i want to create a new object from the Employee class, and it shows which one triggers the error and which one doesn't.

Employee karen = new Employee(); // Triggers the Error

Employee karen = new Employee("Karen"); // Doesn't Trigger Error

I am sorry if this does not help you, Or it is not actually going to work as i suppose. This is the first time I've tried to answer a question. And it's been a while since I've stopped coding in C#.