Gridview数据和文本框以及下拉列表和插入表不起作用

Question

我下面有这段代码，用于将gridview，文本框和下拉列表中的某些值插入到sql表中。当我单击保存时，它不会插入任何记录，并且不会生成任何错误。欢迎找出问题所在的任何帮助

这是代码

protected void BtnSave_Click(object sender, EventArgs e)
    {
        int CustomerID = int.Parse(CSID.Value);
        int UserID = Convert.ToInt32(Session["UserID"]);
        int ModeID = int.Parse(DdlMode.SelectedValue);
        string ManualRec = TxtReceipt.Text;
        string Ref = Convert.ToString(Session["BreakNum"]);
        float Amount = float.Parse(TxtAmount.Text);

    foreach (GridViewRow row in GrdLedger.Rows)
    {

        int LedgerID = Convert.ToInt32(row.Cells[0].Text);
        double LedgerAmount = Convert.ToDouble(row.Cells[2].Text);

        if (MyCon.State.ToString() == "Closed") { MyCon.Open(); }

        using (SqlCommand command = new SqlCommand("insert into TPayments(CustomerID,UserID,ModeID,LedgerID,ManualRec,Ref,Amount,LedgerAmount)values(@CustomerID,@UserID,@ModeID,@LedgerID,@ManualRec,@Ref,@Amount,@LedgerAmount)", MyCon))
        {
            command.Parameters.AddWithValue("@CustomerID", CustomerID);
            command.Parameters.AddWithValue("@UserID", UserID);
            command.Parameters.AddWithValue("@ModeID", ModeID);
            command.Parameters.AddWithValue("@LedgerID", LedgerID);
            command.Parameters.AddWithValue("@ManualRec", ManualRec);
            command.Parameters.AddWithValue("@Ref", Ref);
            command.Parameters.AddWithValue("@Amount", Amount);
            command.Parameters.AddWithValue("@LedgerAmount", LedgerAmount);

            command.ExecuteNonQuery();
        }
    }

    MyCon.Close();
}