I am very new to ajax. Can someone explain to me how this works and what I need to do for my scenario below.
I have a drop down list and a button.
I choose and item from the drop down list ("ex: Car Type")
and press the get types button.
Another drop down list with different types will be populated.
Those are the steps I use. How can I use Ajax instead of post back and refreshing the page please.
Thanks
Related
I have to regions with items on my page. One of them is to edit data, another one is display only. Editable region is hidden on page load and shows when users click on a button. I'd like to pass data between these regions after submit a page. Are computations after submit the only way to do that? I tried with processes after submit, before header etc. but it didn't work.
I'd like to have one pl/sql code to pass data between two regions after submit, how to do such a thing?
Other options include
dynamic action (you'd use Set value)
button's Redirect to page in this application (where you'd redirect to the same page; Link Builder then lets you choose which items will be set to which values)
If you still can't make it work, consider creating sample page on apex.oracle.com; then provide login credentials so that someone might have a look.
I have created a page based on "Form & Report" template. So there is the Report page on which there is the create button. That create button leads to the form page which contains.
It is pretty simple. I don't know if there is a cache memory not emptying itself or if there is a setting that I have not properly set.
When I want to create a new database record, Oracle Apex behaves as if I asked it to update a record (though it still presents me with empty text fields).
Below the image of what's happening.
Create button of the Report
Buttons for edit are shown when I click the create button
Those edit buttons are shown instead of the buttons below => This means that the Apex software is behaving like I asked to edit a record not to insert a record.
Why is this happening?
You need to take a look at your create button. Is it passing a value to the form? If so, you probably don't want that. Is it clearing the cache of the form? If not, you probably want to clear it.
Also, on the form page take a look at your processes.. specifically the Automated Row Fetch (ARF) process.. what's the primary key that this process is using?
Also, take a look at the conditions for each button on your form. For the delete/save buttons you likely want a condition type of "value of item / column in expression 1 Is NOT NULL".
For your create button you would want the opposite.. "value of item /... IS NULL".
In both cases for the expression 1 you'd want to use the item that your ARF is leveraging.
#Bloomberg58 if you used the wizard that should not have anyway try to validate the create button in report page and the server-side validation of create and save button in form page
I have a bit of a unique challenge today. I have a client that wants to be able to search for multiple items based on inserts into a cfgrid. Suppose we have the following web form:
A Country selection dropdown
A State Selection dependent AJAX dropdown
A city Selection dependent AJAX dropdown
An ADD Button
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A CFGRID that will populate a row with selections when the user clicks the add button
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And finally, a CLEAR button, and a GO button on the bottom.
The resulting page will then query the database and get some statistics about the cities selected. So, suppose an individual picks USA > Arizona > Scottsdale and USA > Arizona > Flagstaff. The grid below the options will 'save' each selection and reset to their default options, waiting for a user to pick additional options or click on 'GO'.
The resulting page will then generate columns that list some statistics about the communities and highlight the 'best of' between each selected community.
Each time a user selects the ADD button (assuming three criteria are selected) I want the information to be added into a CFGRID that displays the options selected. Then, After the user selects at least one country/city/state option, have all of the data in the CFGRID get passed to another page that does a query from the data selected. In theory, the user could pick as many communities as they want, assuming they are willing to let the database sludge through enough data to get what they want and wait through a 'loading' screen to get it.
I'm having these challenges, in no particular order:
- I have an HTML grid that I must use per client spec (No Java or Flash, must be HTML)
- I have no idea how to get the selected options into the CFGRID. I assume there is some JavaScript I can write that uses some sort of AddRow function to add data into the grid with the add button but cannot seem to find how to it on the interwebs
- After we conquer the above challenge, how do I pass the data from the grid into the results page? I thought about passing one big string or a structure, but I'm not sure how to do that through the URL or posting, nor how to get the data out of the grid. I wonder if I am better off coding some sort of string that gets passed from the options page to the results page with a get method instead of dealing with the stuff in the CFGRID and have the CFGRID serve only as a 'dummy' display container.
- Finally, after the pass is complete, I would need to loop through through the structure and perform a CFQUERY or CFSTOREDPROC on each row of data, then get the statistics I need to display on the results page. I assume this would depend on how I am getting the data from the options selection page to the results page.
THANK YOU ALL!
CFGRID is great to start, but it can be b*tch to customize and extend... Have you tried editable CFGRID with bind? See how far off it is from what you want first. If it turns out to be very far, then you might want to go for a jqGrid and code up some jQuery.
To start, read Using HTML grids and make the cfgrid editable.
http://help.adobe.com/en_US/ColdFusion/9.0/Developing/WSc3ff6d0ea77859461172e0811cbec22c24-7a01.html#WSc3ff6d0ea77859461172e0811cbec22c24-72e0
Once you got that working, look at these provided JS functions that you can use with CFGRID
http://help.adobe.com/en_US/ColdFusion/9.0/CFMLRef/WS0ef8c004658c1089-6262c847120f1a3b244-8000.html
http://help.adobe.com/en_US/ColdFusion/9.0/CFMLRef/WSd160b5fdf5100e8f-4439fdac128193edfd6-7f5f.html
If you still demand a bit more, you might need to dig into the underlying ExtJS component. At that point I would rather use jqGrid
I found out that the best way to handle this was by using a SerializeJSON call and a Deserialize JSON call back and forth. By using JavaScript notation we are able to pass a complex JavaScript object (array) between one page and another. This has the value add of not having to worry about sessions timing out and making URLs clickable from one solution to the next.
I have a Form to create a new model object and persist it. That form is displayed in a lightbox or popup.
Some fields are dropdownlist showing related info that lives in another table (other model object related to the main model).
What I need to achieve is without leaving the creation form, create a new item of the related type and update the DropDownList in order to continue filling fields and finaly submit the form.
I have done this in winforms but not really sure which is the best approach in MVC 3:
Trigger another popup with a small form?
Use some kind of editable dropdownlist?
Place a small hidden form right next/after the DDL to allow entering the info to create an item in DDL (and to DB also)?
What do you thing is the best option?
Thanks!
There is no editable dropdown list in HTML. There are some toolkits that simulate it, but in general these are clumbsy and really complex. It's a lot easier to stick with basic controls.
You would proably do best to have a small + sign next to the field, and then popup an editing field that inserts the element into the combobox and sends it to the controller via ajax to add to the database.
An alternative to a second pop up is having a toggle add button. When toggled, then show a small area where you can enter the name. Using ajax, save the name, and then refresh your dropdown. This works well if you only have a few attributes to fill in.
I'm working on an InfoPath 2007 form. I have two drop-down lists and i need the second to be populated with items bases on the value chosen in the first list. I use c# to populate the drop-dpwn lists from external sources. I've tried to use the OnChange event to make all this, but the second list is still empty.
If anyone knows, please tell me.
You can filter the entries for the second drop-down list based on your first list (but only if the entries are based on a data source, not manually entered).
Bring up the properties window for
your second drop-down list.
Select your data source.
Click on the button to the right of the Entries text box.
Select the repeating node you wish to use for the basis of your list entry.
Click the Filter Data button. From here you can enter a filter to limit the entries displayed based on the value of your first drop-down list.
Your question was a bit ambiguous. You may be trying to populate a secondary data source based off of your first drop-down list. This should work fine with an OnChange event. Can you post the code you are using to do this?
Some additional tips that may help:
The change event will not fire until focus moves off of the list box. So, for the second drop down to populate, you will need to set the first drop-down then hit tab or click elsewhere in the form.
I don't know the size or nature of the data source you are using for the second drop-down list, but you may consider downloading the entire data source and filter it using the method I described above. This may be a better solution as you won't need to make a database query between entering the first list box and the second one.