Question

I have some trouble to update my sql server 2005 database when i use parameters.Here you can see the code that normally has to work.I precise that i already make others treatments such as insert into and it worked perfectly.

myCommand.Parameters.AddWithValue("@Pk", this.pk);
myCommand.Parameters.AddWithValue("@Titre", this.titre);
myCommand.CommandText = "Update Action set titre=@Titre where pk=@Pk";

//Execute la commande
myCommand.ExecuteNonQuery();

EDIT:When i use hard code such as:

myCommand.CommandText = "Update Action set titre='title' where pk=@Pk";

it works…

Answer 1

I don’t know where you went wrong this is the working code for me

string strCon = @"Data Source=SYSTEM19\SQLEXPRESS;Initial Catalog=TransactionDB;Integrated Security=True";

protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            SqlConnection cn = new SqlConnection(strCon);
            SqlCommand cmd = new SqlCommand("select * from tblTransaction1", cn);
            SqlDataAdapter da = new SqlDataAdapter();
            da.SelectCommand = cmd;
            DataSet ds = new DataSet();
            da.Fill(ds);
            for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
            {
                txtName.Text = ds.Tables[0].Rows[i]["FirstName"].ToString();
                txtName1.Text = ds.Tables[0].Rows[i]["LastName"].ToString();
            }
        }
    }

Button click code

protected void btnInsert_Click(object sender, EventArgs e)
{
    SqlConnection cn = new SqlConnection(strCon);
    obj1.FirstName = txtName.Text;
    obj1.LastName = txtName1.Text;
    if (obj1.upDate(cn))
    {

    }
}

Sample class code file

private bool m_flag = false;
        private string strFirstName;
        private string strLastName;

        public string FirstName
        {
            get { return strFirstName; }
            set { strFirstName = value; }
        }

        public string LastName
        {
            get { return strLastName; }
            set { strLastName = value; }
        }

public bool upDate(SqlConnection con)
    {
        SqlCommand cmd = new SqlCommand();
        cmd.Connection = con;
        if (con.State != ConnectionState.Open)
        {
            con.Open();
        }

        try
        {
            cmd.Parameters.AddWithValue("@Fname", FirstName);
            cmd.Parameters.AddWithValue("@Lname", LastName);
            cmd.CommandText = "Update tblTransaction1 set LastName=@Lname where FirstName=@Fname";
            if (cmd.ExecuteNonQuery() > 0)
            {
                m_flag = true;
            }
        }
        catch
        {

        }
        return m_flag;
    }

Sample Images