Question

I’m working with C# and SQL Sever 2008, when I try to create a command for searching a record I got exception that said “Invalid Column name”

this is my code :

void cari()
        {
            koneksi.Open();
            DataTable dt = new DataTable();
            SqlDataAdapter SDA = new SqlDataAdapter("SELECT * FROM jadwalkuliah where Subject = "+ textBox1.Text, koneksi);
            SDA.Fill(dt);
            koneksi.Close();

            dataGridView1.DataSource = dt;
        }`

the search command should be work as search engine, can anyone help me?

Answer 1

You haven’t quoted the value of subject:

SqlDataAdapter SDA = new SqlDataAdapter("SELECT * FROM jadwalkuliah where Subject = '"+ textBox1.Text + "'", 

koneksi);

Or for a contains search:
SqlDataAdapter SDA = new SqlDataAdapter(“SELECT * FROM jadwalkuliah where Subject = ‘%”+ textBox1.Text + “%'”, koneksi);

You shouldn’t build queries this way. It is susceptible to SQL injection attacks.