BC30311：类型'faq'的值无法转换为'常见问题解答'

Question

真的坚持这个。逻辑似乎与我在其余应用程序中使用的任何其他Linq to Entity逻辑不同。我只是使用Linq to Entity将数据写入名为FAQ的表中。但是我得到了消息BC30311：Type of Type＆＃39; faq＆＃39;无法转换为常见问题解答＆＃39;。我无法弄清楚它意味着什么价值。

    Dim objQuestion As TextBox = gvDetails.FooterRow.FindControl("txtFooterQuestion")
    Dim objAnswer As TextBox = gvDetails.FooterRow.FindControl("txtFooterAnswer")
    Dim objCategory As TextBox = gvDetails.FooterRow.FindControl("txtFooterCategory")

    Using DBContext As New fundmatrixEntities
        Dim queryFAQ = DBContext.FAQs
        Dim oFAQ As New FAQ
        queryFAQ.Add(oFAQ)
        oFAQ.FAQId = 5
        oFAQ.Question = objQuestion.Text
        oFAQ.Answer = objAnswer.Text
        oFAQ.Category = objCategory.Text
        oFAQ.DateCreated = Date.Now
        oFAQ.DateUpdated = Date.Now
        Try
            DBContext.SaveChanges()
            BindEmployeeDetails()
            lblresult.ForeColor = Drawing.Color.Green
            lblresult.Text = "details inserted successfully"
        Catch ex As Exception
            lblresult.Text = "There was problem inserting the FAQ!"
            lblresult.ForeColor = Drawing.Color.Red
        End Try

    End Using