hi everyone. can someone tell me whether the sql command is right because i get a blank gridview when i click the search button. The button was supposed to search the keywords entered in a textbox from 2 tables using wildcards. thank you in advance

Private Sub bnSearch_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles bnSearch.Click
        Dim myConnection As New SqlConnection(myConStr)
        Dim mySqlCommand As New SqlCommand()
        Dim mySqlDataReader As SqlDataReader
        Dim keywords As String
        Dim sqlStr As String

        keywords = "'%'" & txtSearch.Text
        sqlStr = "SELECT tblBooks.fldTitle, tblBooks.fldAuthor, tblBooks.fldISBN, tblBooks.fldNoCopies, tblBooks.fldInStock, tblCat.fldCatName FROM tblBooks INNER JOIN tblCat ON tblBooks.fldCatID = tblCat.fldCatID WHERE (fldTitle LIKE @keywords) AND (fldAuthor LIKE @keywords) AND (fldCatName LIKE @keywords) AND (fldISBN LIKE @keywords)ORDER BY tblBooks.fldTitle"

        mySqlCommand.Parameters.AddWithValue("@keywords", keywords)
        mySqlCommand.Connection = myConnection
        mySqlCommand.CommandText = sqlStr
        myConnection.Open()
        mySqlDataReader = mySqlCommand.ExecuteReader
        gvBookList.DataSource = mySqlDataReader
        gvBookList.DataBind()
    End Sub