可以通过用户名查询的
Dim oldpwd As String = "123456"
Dim newpwd As String = "abc"
Dim name As String = "张三"
Dim fdr As DataRow = DataTables("表A").Find("名称 = '" & name & "'")
If fdr IsNot Nothing Then
If fdr("config") Like "*" & MD5Encrypt(oldpwd) & "*"
fdr("config") = fdr("config").replace(MD5Encrypt(oldpwd), MD5Encrypt(newpwd))
Return
End If
End If
msgbox("密码不正确")