How i can remove Thos error

Question

private void textBox8_TextChanged(object sender, EventArgs e)

{

DataTable dt = new DataTable();

dt = dl.select();//selecting Table from database using select() function

DataView dvu = dt.DefaultView;

dvu.RowFilter = "User Name LIKE '%" + textBox8.Text + "%'";}

 

I am trying to make a search button using this code but it throws an error as

 

         Syntax error: Missing operand after 'Name' operator.' 

 

so kindly some one tell me what is the correct syntax.