Just curious, what's the AxMSDataListLib.AxDataComb
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Converting a VB6 lookup-datacombo to VB.NET
I'm in the process of converting a large ADO based VB6 database application to VB.NET. There are about 70 dataforms, and most of them have one or more datacombos on them that operate as lookup combos, using the DataField, BoundColumn, ListField, RowSource and DataSource properties.
For the time being, I want to continue to use ADO (2.7) rather than ADO.NET, maybe perform that conversion at a later stage.
The VB6 Conversion Wizard converts VB6's DataCombo controls into AxMSDataListLib.AxDataComb
So my question is: can the AxMSDataListLib.AxDataComb
Thanks
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Answers
mondayblueboy,
I've put the AxMSDataListLib.DLL onto my website, take a look at it.
http://www.rodtv.com/Sourc
To use it, just make a normal combobox, and change from System.Windows.Forms.Combo
The upgrade wizard translates all ActiveX Form Controls into .NET compatible AxtiveX controls; only a few controls like the textbox are translated into native .NET controls. AxMSDataListLib.AxDataComb
Now, I'm already able to *manually* program the AxMSDataListLib.AxDataComb
- Set the lookup ADOrecordset bookmark to the key that corresponds in the main recordset using the rs.Find method;
- Set the RowSource property of the lookup combo to the lookup recordset;
- Set the ListField property of the combo to the name of the description column in the rs;
- Set the CtlText property of the combo to the value of the description column in the rs;
When the user clicks OK:
- Retrieve the combo's SelectedItem into an object variable BM
- Set the lookup recordset BookMark to this BM variable (now it's synchronised with the selected value)
- Set the column in the main recordset to the value in the lookup recordset
Finally update and close the main recordset.
OK, this works. No need to write a loop for the lookup recordset to fill the combo! Seven lines of code per lookup combo, so it can be done. But it's not nearly as elegant as the original VB6 databinding code, where you create automatic lookup combo's by assigning just five properties. So I'm still wondering if this can be accomplished by using the VB6.MBindingCollection.Add
Hans.
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by: morphinexPosted on 2003-09-22 at 08:20:58ID: 9406334
hveluwen, I feel your pain. I really do.
We didn't know what to do back when we converted from VB6 to VB.NET ~ we were using some kind of weird global modules that imports SQL Stored Procedures that could be used as recordsets and datafields in combo boxes.
The converter didn't like that, and we had countless errors popping up left and right. We started month long project to convert every single combo box from databinding to doing crazy loops like this one...
Dim rs_ThisRecordSet As Recordset
Set rs_ThisRecordSet = mRS_Global.m_rsdbo_LoadSom
Do Until rs_ThisRecordSet.EOF
thisComboBox.AddItem Trim$(rs_ThisRecordSet.Fie
rs_ThisRecordSet.MoveNext
Loop
Call rsOpen(rs_ThisRecordSet, False)
... I replaced so many combo boxes.. it was crazy. I even made little programs where I would stick in the combo box name, the stored procedure name, and the field name, and it'd generate code to throw into the form.
Anyway, I hope someone will come up a better answer than what I've given...
Best of luck!