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Imports System.Data
Imports System.Data.SqlClient
Partial Class web_Default4
    Inherits System.Web.UI.Page
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

        BindData()

    End Sub

    Protected Sub BindData()

        Dim objConn As SqlConnection
        Dim objCmd As SqlCommand

        Dim strConnString As String
        strConnString = "Data Source=BENZNEW-PC;Initial Catalog=Project;Integrated Security=True"
        objConn = New SqlConnection(strConnString)
        objConn.Open()

        Dim strSQL As String
        strSQL = "SELECT * FROM product "

        Dim dtReader As SqlDataReader
        objCmd = New SqlCommand(strSQL, objConn)
        dtReader = objCmd.ExecuteReader()

        myGridView.DataSource = dtReader
        myGridView.DataBind()

        dtReader.Close()
        dtReader = Nothing

        objConn.Close()
        objConn = Nothing

    End Sub

    Protected Sub myGridView_RowCommand(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewCommandEventArgs) Handles myGridView.RowCommand
        Try
            If e.CommandName = "Add2Cart" Then
                Dim strProductID As String = e.CommandArgument
                Dim dt As DataTable
                Dim dr As DataRow

                If IsNothing(Session("myCart")) Then
                    dt = New DataTable()
                    dt.Columns.Add("p_id")
                    dt.Columns.Add("qty")
                    ' dt.Columns.Add("p_pic")
                    Session("myCart") = dt
                End If

                dt = DirectCast(Session("myCart"), DataTable)
                Dim foundRows() As DataRow
                foundRows = dt.Select("p_id = '" & strProductID & "'")
                If foundRows.Length = 0 Then
                    dr = dt.NewRow()
                    dr("p_id") = strProductID
                    dr("qty") = 1
                    'dr("p_pic") = 1
                    dt.Rows.Add(dr)
                Else
                    Dim updateRow() As DataRow
                    updateRow = dt.Select("p_id = '" & strProductID & "'")
                    updateRow(0)("qty") = updateRow(0)("qty") + 1
                End If

                Session("myCart") = dt
                Response.Redirect("ViewCart.aspx")

            End If
        Catch ex As Exception
            MsgBox(ex.ToString)
        End Try
    End Sub



    Protected Sub myGridView_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles myGridView.RowDataBound

        If e.Row.RowType = DataControlRowType.DataRow Then

            '*** Picture ***'
            'Dim imgPicture As Image = DirectCast(e.Row.FindControl("imgPicture"), Image)
            'If Not IsNothing(imgPicture) Then
            '    imgPicture.ImageUrl = "img/" & e.Row.DataItem("p_pic")
            'End If

            '*** ProductID ***'
            Dim lblProductID As Label = DirectCast(e.Row.FindControl("lblProductID"), Label)
            If Not IsNothing(lblProductID) Then
                lblProductID.Text = e.Row.DataItem("p_id")
            End If

            '*** ProductName ***'
            Dim lblProductName As Label = DirectCast(e.Row.FindControl("lblProductName"), Label)
            If Not IsNothing(lblProductName) Then
                lblProductName.Text = e.Row.DataItem("p_name")
            End If

            '*** Price ***'
            Dim lblPrice As Label = DirectCast(e.Row.FindControl("lblPrice"), Label)
            If Not IsNothing(lblPrice) Then
                lblPrice.Text = e.Row.DataItem("p_price")
            End If

            

            '*** AddToCart ***'
            Dim lnkAddToCart As LinkButton = DirectCast(e.Row.FindControl("lnkAddToCart"), LinkButton)
            If Not IsNothing(lnkAddToCart) Then
                lnkAddToCart.Text = "Add"
                lnkAddToCart.CommandName = "Add2Cart"
                lnkAddToCart.CommandArgument = e.Row.DataItem("p_id")
            End If

        End If

    End Sub

End Class

Response.Redirect("ViewCart.aspx")