Question

Foxpro Grid update problems.

Asked by: jseneris

Foxpro is killing me!!

I have a treeview, a grid, and a combo box.

The table has an id field, a description field, and a list field.  

The treeview is populated from the table with the id field as the node id, and the desciption field as the node lable.  The combobox control value is from the table, the values are from another table.  The grid is populated from a query that filters the table based on whether or not the list field is populated.

I can populate the tree view.  As I navigate around the tree view, I can use the node id to populate the combobox and if the node is in the grid move the pointer to that record.  

Here's my problem.  When I change the value in the combobox, I can't propogate that change down to the grid view.  I've tried using the interactive change event of the combo box to do a refresh and setting the grid's recordsource equal to itself.  It almost works, but the grid doens't show the change until after I move to a new node and change the combobox value again.  It's basically one action behind.  I'm not sure what I'm missing.

Also, I'd like to change the selected node in the tree view if the user selects a row in the gridview.  I'm not sure which grid event to use to do that.



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Asked On
2009-06-25 at 11:17:25ID24522865
Topic

FoxPro Database

Participating Experts
3
Points
250
Comments
8

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Answers

 

by: CaptainCyrilPosted on 2009-06-25 at 11:31:56ID: 24714553

To trap user movement in the grid

AfterRowColChange

 

by: CaptainCyrilPosted on 2009-06-25 at 11:32:49ID: 24714561

We need your code to tell what is missing.

You need to move the record pointer and oGrid.Refresh to refresh the grid.

 

by: Olaf_DoschkePosted on 2009-06-25 at 12:48:51ID: 24715234

Do you bind combobox and grid to the exact same alias?

combobx.interactivechange: thisform.grid.setfocus() and/or thisform.grid.refresh()

Bye, Olaf.

 

by: jsenerisPosted on 2009-06-25 at 13:49:31ID: 24715890

I create a cursor from the table that the combobox is bound to.  This is what I currently have:

combobox1.controlsource = sms_xml.des_dbf

gridbox1.controlsource = "SELECT nodeid, node_des, des_dbf, des_fld, sec_code from sms_xml WHERE !EMPTY(des_dbf) INTO cursor activenodes"
gridbox1.controlsourcetype = SQL statement

combobox1.interactivechange:
this.Parent.grid1.RecordSource = "SELECT nodeid, node_des, des_dbf, des_fld, sec_code from sms_xml WHERE !EMPTY(des_dbf) INTO cursor activenodes"
this.Parent.grid1.Refresh()

The change makes it to the gridview eventually just not immediately like I would expect it to.

 

by: tusharkanvindePosted on 2009-06-25 at 21:42:21ID: 24718021

You mean in the combobox, if you make sms_xml.des_dbf as empty, you want the record to appear in the grid and if you make it not empty, you want it to disappear from the grid?

Is sms_xml buffered? In that case, use the WITH BUFFERING clause in the SQL statement.

 

by: Olaf_DoschkePosted on 2009-06-25 at 22:51:12ID: 24718287

I think tushar is on the right track about the buffering issue. But in interactivechange you don't yet have saved to the table, this is only done, after the valid event is passed.

Recreating the cursor you display in a grid is a bad idea. The grid will ract in blanking out, if you do that. One way is to do like you and make an sql statement the recordsource, but I doubt a refresh helps to requery the grid cursor by it's SQL Recordsource. I don't use that recordsourcetype, I'd rather select the data into a cursor and then bind the grid to that alias with recordsourcetype alias. Then when you need a refresh unbind the grid by setting recordsource empty, then redo the query, then set the grids recordsource back.

Bye, Olaf.

 

by: CaptainCyrilPosted on 2009-06-25 at 23:01:29ID: 24718328

What I do is recreate the cursor from scratch and recreate the grid. I do that since the grid properties change according to data so I don't have any properties assign to the grid in the form. I just slap a grid control on the form.

 

by: jsenerisPosted on 2009-08-13 at 12:48:19ID: 25092113

turns out I needed to add a "WITH (Buffering=.t.)" to the SQL statement.

20120131-EE-VQP-002

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