sql - 在sql语句中正确使用撇号来调用组合框

Question

如何更改“COMP”以检查我在组合框类别上选择的内容？

我的文本框是 cmbCategory

cmd = New SqlCommand("SELECT * FROM tblOfficeEquipmentSubCategory Where CAT_ID='COMP'", sqlconn)
If sqlconn.State = ConnectionState.Closed Then sqlconn.Open()
Dim sdr As SqlDataReader = cmd.ExecuteReader()
sdr.Close()

Answer 1

尝试这样的事情：

cmd = New SqlCommand("SELECT * FROM tblOfficeEquipmentSubCategory Where CAT_ID=@Category", sqlconn)
cmd.Parameters.Add("@Category", SqlDbType.NVarChar, -1).Value = cmbCategory.SelectedText
If sqlconn.State = ConnectionState.Closed Then sqlconn.Open()
Dim sdr As SqlDataReader = cmd.ExecuteReader()
sdr.Close()