ODBC DATABASE ERROR of parameter

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ex = {"ERROR [07002橾] [Microsoft][ODBC Microsoft Access Driver] Too few parameters. Expected 1."}

not getting this ERROR please help to solve this thank you in Adv ..
my code is below ..

C#

protected void txtuname_TextChanged1(object sender, EventArgs e)
{
    try
    {
        if (!string.IsNullOrEmpty(txtuname.Text))
        {

            con.Open();
            OdbcCommand cmd = new OdbcCommand("select U_name from LOGIN where U_name=@Name", con);
            cmd.Parameters.AddWithValue("@Name", txtuname.Text);
            OdbcDataReader dr = cmd.ExecuteReader();
            if (dr.HasRows)
            {
                checkusername.Visible = true;
                imgstatus.ImageUrl = "Image/NotAvailable.jpg";
                lblStatus.Text = "UserName Already Taken Please Try Another Name For Example:Bharat123/Bharat89";
                System.Threading.Thread.Sleep(2000);
                txtuname.Text = string.Empty;
            }
            else
            {
                checkusername.Visible = true;
                imgstatus.ImageUrl = "Image/Icon_Available.gif";
                lblStatus.Text = "UserName Available";
                System.Threading.Thread.Sleep(2000);
            }
        }
        else
        {
            checkusername.Visible = false;
        }
    }
    catch (Exception ex)
    {
        ScriptManager.RegisterStartupScript(this, this.GetType(), "alertmessage", "javascript:alert('ERROR,Please try again if this error occurs again please mail us on Contact Us page , Thank You')", true);

    }
}

Posted 7-May-13 23:50pm

Amirsalgar1

Updated 8-May-13 0:03am

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

v3

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Comments

CHill60 8-May-13 6:13am

First things to check are:-
1. Is there a column in table LOGIN called U_name (spelled exactly like that)
2. Does txtuname.Text contain anything

Amirsalgar1 8-May-13 6:16am

thanx for the reply sir,
yup i was working successfully .. before creating dsn
but now it is showing me error

CHill60 8-May-13 6:22am

Which implies that there is a problem with your dsn ... use Improve question link to post how you are connecting to the access database

Amirsalgar1 8-May-13 6:51am

it is connected correctly sir,
it is occurring with Login page only

Amirsalgar1 8-May-13 6:17am

txtuname is contain username .. which is autopostback which is checking that username is exist in database or not

CHill60 8-May-13 6:23am

Hm ... are you absolutely sure that it does contain the username by the time it hits this code? If the page is redrawn it could well be blank

Amirsalgar1 8-May-13 6:27am

yup it is sir ,you are right

Amirsalgar1 8-May-13 6:20am

Re: ERROR [07002] [Microsoft][ODBC Microsoft Access Driver] Too few parameters.Expected 1

1 solution

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Andy Lanng · Accepted Answer · 2013-05-08T02:14:00

ODBC and SQL work differently

The parameter in the query should be a q-mark '?'
The parameters can be any unique name and must be added to the collection in the same order as the q-marks they should replace appear in the query

i.e.

C#

string q = "select * from t_able where a = ? and b = ?";

OdbcCommand cmd = new OdbcCommand(q, con)

cmd.Parameters.AddWithValue("ParamA", aValue);
cmd.Parameters.AddWithValue("ParamB", bValue);

Even when you wish to use the same parameter twice in the same query, you will have to add two parameters with unique names and the same value.

This is because ODBC is much more generic that TSQl which used the '@*' style parameters