试图在MS Access中编辑文本字段，但它说它需要更多参数

Question

I'm trying to edit a textfield in an MS Access database. I'm able to successfully edit a number, but if I try to edit a textfield it asks me for more parameters. My code looks like this:

try
{
    ad.UpdateCommand = new OleDbCommand("Update Tabel1 set Navn=" + txt_navn.Text.ToString() + " where ID=" + txt_userID.Text + "", conn);
    ad.UpdateCommand = new OleDbCommand("Update Tabel1 set Niveau=" + txt_niveau.Text.ToString() + " where ID=" + txt_userID.Text + "", conn);
    conn.Open();
    ad.UpdateCommand.ExecuteNonQuery();
    conn.Close();
}
catch(Exception ex)
{
    MessageBox.Show(ex.Message);
    conn.Close();
}

Basically, the Navn text field won't accept any changes and asks for more parameters if I disable the Niveau line. I've also tried having both within the same ad.UpdateCommand line, but that gave me an error.

As it is now it doesn't give any error, but it just doesn't change the 'Navn' field in the database, the 'Niveau' field changes just fine. Do you guys have any idea?

Answer 1

Navn may be reserved, so try to frame it. Also, there should be no reason to cast the text content of a textbox to string. And, as mentioned, one call will do it:

ad.UpdateCommand = new OleDbCommand("Update Tabel1 Set [Navn] = '" + txt_navn.Text + "', Niveau = " + txt_niveau.Text + " Where ID = " + txt_userID.Text + "", conn);

Answer 2

Hope this will do the trick

ad.UpdateCommand = new OleDbCommand("Update Tabel1 set Navn='" + txt_navn.Text.ToString() + "' where ID=" + txt_userID.Text + ";", conn);
ad.UpdateCommand = new OleDbCommand("Update Tabel1 set Niveau='" + txt_niveau.Text.ToString() + "' where ID=" + txt_userID.Text + ";", conn);

I have updated Navn='" + txt_navn.Text.ToString() + "' instead of Navn=" + txt_navn.Text.ToString() + "

And same goes to the next command

But the thing is it would only update Niveau and not Navn since you have the last command store in the ad.UpdateCommand so you can improvise your code like this

ad.UpdateCommand = new OleDbCommand("Update Tabel1 set Navn='" + txt_navn.Text.ToString() + "', Niveau='" + txt_niveau.Text.ToString() + "' where ID=" + txt_userID.Text + ";", conn);