在vb.net中使用stringbuilder传递SQL查询时出错

Question

我传递了一些参数，使用StringBuilder将记录插入到表中，I＆＃39;得到错误：

  

错误134逗号，＆＃39;）＆＃39;或预期的有效表达式延续。

近乎未经批准的＆＃39;在哪里获得批准＆＃39;这是一个包含＆＃39; N＆＃39;

的字符串参数

这是代码

 sb.Append("insert into [DBAccounting].[dbo].[CRS_TaxReport_TaxConsultant]")
 sb.Append(" ([CLIENTCODE],[TC],[SECURITY_NO],[TC_NAME],[ADDRESS],")
 sb.Append("[ACCOUNT_NAME],[ACCOUNT_NO],[PHONE_NO],")
 sb.Append("[EMAIL_IDS],[IsApproved],")
 sb.Append("[ApprovedBy],[ApproveDate],")
 sb.Append("[MakerId],[MakerDt])")
 sb.Append("VALUES('" & txtclientCode.Text & "',")
 sb.Append("'" & txttc.Text & "','" & txtSecNo.Text & "',")
 sb.Append("'" & txtTcName.Text & "','" & txtaddress.Text & "','" & txtaccname.Text & "',")
 sb.Append("'" & txtaccno.Text & "','" & txtphno.Text & "','" & txtMailID.Text & "',")
 sb.Append(" "napproved.ToString" ,"","","approvedby.ToString","Today.ToString")")