主题：[求助]文本精确筛选

一下代码可以实现模糊查询，我想实现精确查询，怎么修改呢？

Dim Filter As String

Dim cmb As String

cmb = e.Form. Controls("TextBox2").text
'If e.Form. Controls("查询").Value Is Nothing
''Messagebox.show("请输入起始日期!","提示",MessageBoxButtons.OK,MessageBoxIcon.Information)
'Return
'End If
Dim txt As String = e.Form.Controls("TextBox2").Text
Dim dt1 As DataTable = DataTables("单次来电_Table1")
If txt > "" Then
    txt = "'%" & txt & "%'"
    txt =  "编号 Like " & txt
       
End If

dt1.LoadFilter = txt
dt1.Load
Tables("单次来电_Table1").Sort = "录入时间 DESC"

txt = "'%" & txt & "%'"
    txt =  "编号 Like " & txt
        不知道怎么改？？？？能实现精确筛选编号     ？？  谢谢！！