I have a datagridviewcomboxcolumn to which I need to load data either from another form or by excel.
Before loading, I am validating the data to make sure it exists in the datagridviewcomboxcolumn list.
Whenever I try to load the data, it gives an exception error as value is not valid.
How can this be solved?
Or
is there a workaround to disable this error?
Related
I'm trying to automate populating a PDF form from MS Access VBA. The form itself is maintained online and so my process is:
Download the form
Open it in Adobe
Auto-populate fields
Save / send it on to others
All of this I'm doing from Access VBA. I've encountered an issue on step 3, however.
What I noticed was, if I try to populate the field from VBA, it works fine if the field already has a value. However, on a new / blank form, it generates an error.
Specifically, I call it using the document Javascript object (jso) thusly:
jso.xfa.resolveNode("form." & jso.getNthFieldName(0)).rawValue = 'test'
If the form field is not populated, VBA errors, saying the object doesn't have the rawValue property.
I'm guessing some sort of model initialization is forestalled until the form is populated at least once. The field reference exists in the jso.xfa model, but the property itself is otherwise inaccessible.
Is there a way around this other than pre-populating a "dummy" form? I'd rather not have to maintain / update it as the original gets changed online.
I have a subform that changes where it gets its data from based on user input by using the Me.SubForm.SourceObject = Query.SomeQuery. It seems that by doing this, I am losing the ability to set the BeforeUpdate property.
The code I am using is as follows:
Forms![PartsDatabase]![RepsSubform].Form![Pack Rank].BeforeUpdate = "=ToTracking()"
I have confirmed that this works before the SubForm.SourceObject is changed, but afterwards it throws the following error: RTE 2455 "You entered an expression that has an invalid reference to the property BeforeUpdate."
I was wondering if this is a known issue or if I just need to modify my code to adjust.
You are getting things muddled up here. You should never be changing Source Objects, rather you should be changing the Record Source. The code involved in the Form is Form level. If you wish to use the Before Update event, it belongs to the Form and not the Recordsource. So you always go to change the RecordSource.
You would use,
Forms!Parentform!SubForm.Form.RecordSource = "SELECT someFields FROM someTable;"
Or,
Forms!ParentForm!SubForm.Form.RecordSource = "yourCompiledQueryName"
I have some code I need to load in before I want the code to run (I want to create a table), I tried 'Onload' but this is not soon enough, basically I'm looking for something just like OnInit() where I can load all I need before anything actually occurs. My problem is that it's checking for the table way to early (Because it hasn't been created yet)
http://gyazo.com/c731783b9b2a01dcaf93f92a170f61ba
So really I just need some help with calling code before the actual onLoad event is called.
THanks
Is OnOpen event suitable?
And you can have empty RecordSource in form and set it after you have created table.
1. open form in design view
2. copy RecordSource
3. in you event(onOped or onLoad) put after table creation code
Me.RecordSource = "COPY'ed recordsource"
I have a datagridview that I've added a checkbox column to. When I preview my data without the checkbox it works fine. when I run the program and try to load the datatable, I get a data error. I'm not sure what may be causing this. Where can I look to figure out what's causing this error?
Thank you
Doug
Your e.Context returns as Display. If you take a look at MSDN you will see for display it says
A data error occurred when displaying
a cell that was populated by a data
source. This value indicates that the
value from the data source cannot be
displayed by the cell, or a mapping
that translates the value from the
data source to the cell is missing.
In other words the checkbox column in the dgv probably doesn't quite know how to display the information you are giving it. So, chances are you are telling the checkboxes whether they should be true or false incorrectly.
Update: Perhaps, your solution lies with the TrueValue and FalseValue properties of DataGridViewCheckBoxColumn Class. These properties define when a checkbox should be checked or not checked. If you don't have these set, or if you are trying to set your checkboxes to something other than either of the two values in these properties, you would have problems.
I'm using VB.NET 2008.
I have an Bound DataGridView with a numeric column that can be edited. However when one selects the number and backspaces there is an error.
If I trap it in DataError Event the error message is "Input String was not in a correct format".
How can I prevent this error?
If you could provide a small sample of your code it might be more helpful, but not having that i'd guess the application is trying to convert the empty string to a number, and it is failing. I'd say your best bet is to put a try/catch in the event that occurs when the data is being updated, and mark it as "handled" (check the EventArgs for a Handled property) to keep the error from being thrown. You'll then need to do your own error checking on the actual save code once the user is done editing the column.
Turns out the problem was that I had changed the DefaultCellStyle.NullValue. I changed it back to the default (Blank) and now everything is fine.