不支持关键字：“SSL 模式”，在 VB.Net GridView 中设置连接字符串时

问：

因此，我在 Vb.Net 中创建了一个 GridView，目标是在 GridView 的脚行中向 SQL 数据库插入新行。 当我尝试实际插入新行并单击“插入”按钮时，它出现错误：

不支持关键字：“SSL 模式”

我做错了什么？

这是我的代码：

Protected Sub SUBINSERT(sender As Object, e As EventArgs) Handles GridView1.SelectedIndexChanged

    For Each row As GridViewRow In GridView1.Rows
        Dim constring As String = "server=localhost;user id=root;Password=;database=NAME;sslMode=None;Convert Zero Datetime=True"
        Dim FooterRow As GridViewRow = CType(GridView1.FooterRow, GridViewRow)
        Dim strCustomerID As String = TryCast(FooterRow.FindControl("ddlCustomerID"), DropDownList).SelectedValue
        Dim strOrderID As String = TryCast(FooterRow.FindControl("textboxOrderID"), TextBox).Text
        Dim strOrderDate As String = TryCast(FooterRow.FindControl("textboxOrderDate"), TextBox).Text
        Dim strOrderTotal As String = TryCast(FooterRow.FindControl("textboxOrderTotal"), TextBox).Text



        Using con As New SqlConnection(constring)
            Using cmd As New SqlCommand("INSERT into Orders(OrderID,OrderDate,CustomerID,OrderTotal),Values(@OrderID,@OrderDate,@CustomerID,@OrderTotal)", con)

                cmd.Parameters.AddWithValue("@OrderID", strOrderID)
                cmd.Parameters.AddWithValue("@OrderDate", strOrderDate)
                cmd.Parameters.AddWithValue("@CustomerID", strCustomerID)
                cmd.Parameters.AddWithValue("@OrderTotal", strOrderTotal)

                con.Open()
                cmd.ExecuteNonQuery()
                con.Close()
            End Using
        End Using

    Next
    MsgBox("Inserted successfully")

End Sub