Data type mismatch criteria errors

[technocraze]

Hi guys,

Implementations application & programming environ
MS Acess + Visual Basic

Table fields
Serialno (pk) - Auto number
StudentId - text
Course - text
intake - number

Control 
Combobox1 (StudentId) - predefined list 
TextBox1 (StudentId) - bound to controlsource StudentId
TextBox2 (Course) - bound to controlsource course
TextBox3(intake) userinput

Private_Sub_Combo1_AfterUpdate event

Dim rs as Object

Set rs = Me.RecordSetClone
rs.FindFirst "[Serialno] = " Str(Nz(Me![Combo1]))
If Not rs.EOF Then Me.Bookmark = rs.Bookmark
Me.StudentId.value = Combo1.Column(0)

I am having an error (Data type mismatch criteria errors) on the last stat of the AfterUpdate event. I am aware that Str only take in Numerical values but nt too sure as hw that stat can be changed to take in string values.

I have invoked the save command to add the below mentioned to Student table but i want to filter dupliacte student Id value selected from the combo box. I have set the field to Yes(No Duplicate) but getting an error this will allow duplicate value, refined index or remove duplicate in the fields. No idea as to what is it but i have provided the necessary info for review. Tks for assisting on this issue,

Private Sub_Save event
On_Error.......

Dim rs as RecordSet
Dim db as Database
Set rs = Me.RecordsetClone
Set db = CurrentDb
Set rs = db.OpenRecordSet("Select StudentId, Course, intake from Student where StudentId = '" & Me.StudentId.value & "' And Course = ''" & Me.Course.value & "')
If Not rs.EOF Then
rs.MoveNext
rs.AddNew
rs("StudentId").value = Combo1.value
rs("Course").value = text2.value
rs("intake").value = text3.value
rs.update
rs.close
End If

set rs = Nothing
set db = Nothing

OR

Private Sub AddRecord event
DoCmd.OpenForm "StudentRecord", acNormal, ,StudnetId = '" & Me.Combo1.Value & "' And course = '" & Me.textBox2.value & "'
DoCmd, acAddForm
DoCmd.GoToRecord , , acNewRec

[NeoPa]

I can see you've made a great effort to post as well as you can here with many of the suggestions followed from the guidelines. Unfortunately, what I can see of your code and setup is so unlike how to do things in Access I'm confused as to where to start. Have you looked at any of the tutorials linked to from this site? Not just the ones on here but other sites too. It seems harsh but I think you need to look at some examples of things similar to what you want then change them for your purposes. I didn't want to post this and just criticise, but I wouldn't be happy to leave you still working that way. Do you have any support at work? Someone who can help guide you in the right direction.
For your specific question about the Data type mismatch, I think you need to look at the ComboBox value in the first column.
StudentID is text (according to your post) so should take any value. Even this doesn't make sense. The code looks as if it couldn't possibly run so I don't understand how it can give an error. I'm too confused to be of any more help. Sorry.

[technocraze]

Thanks pals for yr kind advice. I have manage to resolve my issue.

I can see you've made a great effort to post as well as you can here with many of the suggestions followed from the guidelines. Unfortunately, what I can see of your code and setup is so unlike how to do things in Access I'm confused as to where to start. Have you looked at any of the tutorials linked to from this site? Not just the ones on here but other sites too. It seems harsh but I think you need to look at some examples of things similar to what you want then change them for your purposes. I didn't want to post this and just criticise, but I wouldn't be happy to leave you still working that way. Do you have any support at work? Someone who can help guide you in the right direction.
For your specific question about the Data type mismatch, I think you need to look at the ComboBox value in the first column.
StudentID is text (according to your post) so should take any value. Even this doesn't make sense. The code looks as if it couldn't possibly run so I don't understand how it can give an error. I'm too confused to be of any more help. Sorry.