It was a very big problem to me please help me, I am using ag grid to show the Data Base data for retrieving purpose it is working fine, but when i am editing the data of existing records , edited data is not binding to component.ts file. I mean if i enter any new column or modify the existing column the data is not reflecting in to the component.ts.(In Angular2 terminology it is similar to two way data binding).
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We are using Angular ui-grid in our project. We have a grid in our project, that uses filtering (both using drop-downs and free-form text). Once the grid is refreshed and new data is got, we could see that the filtering values are not touched. However, we want the new data to be filtered using the old filtering values. How to do it using ui-grid? Please let us know.
Thanks
Udaya
Two solutions i can think of are:
Using Single Filter:
http://ui-grid.info/docs/#!/tutorial/321_singleFilter
Manually filter the data first then pass to grid.
yeah the question is: can mcv display on the details and index form the text data values vs just ID value that gets stored in the database .
It seems that mvc is very limited in what it can display to the screen. All of the demos and tutorials seem to stop short of showing this is a possibility most just show the user typing in the the full text value. So for example the user has a user interface form that has a list of values drop down element. THey click the value and the ID gets stored to the database.
Later on recall the user wants to pull the data back up for review... in mvc it seems you are stuck with displaying the ID field in the textbox.
but in most other systems you can make a datatable and return the text value of the field back to the form... Is this possible with MVC or are you limited to saving the full text value to the the database?
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yeah the answer is: Make a view in SQL Server and then Link that View to the application via the EDMX. Details below.
Finally! I was able to figure out and I will post the solution so that it may help some one get around the mvc / normalized database limitation that seems to exist when you try to follow some of the tutorials.
The key is to build a SQL view outside of MVC. This can then be linked to the application and it will appear to be a table.
So if you use the database first method and you are using SQL server you will need to simply make a view in SQL server. This take mvcs out of the picture all and is much easier.
Step 1: Make a SQL view... that has everything you need joined in one big super view for what you need to display.
So in my case I made a sql server view that has the storage table linked to the support tables. Think of the query builder in MS Access where you link your tables to make a query.
You draw out your tables and links.
Add that to your Database First EDMX and in your controller use that new super view... and in your index and details forms you change the #model to your new super sql view and change the field name in the textboxfor... Boom problem solved... pretty swell how it all works... in this way you don't have to build some complicated view model. You just take the class that the wizard builds and then make a partial class to rename fields to give them user friendly names.
And you are no longer limited by mvc limitations
hope this helps!
oracle 10.4
devart dotConnect - 6.50...
MVC2 project - web page
User fills out form, then controller gets new entity, fills it out. saves database
System_id before saving = 0 (its an int/number - so no cannot be null)
Several other tables linked, so they have their own System_id as well.
When it gets saved to database, some trigger (there is a stored trigger for the table, which I only seam to understand as when system_id=null to be fired), a new Number is assigned for System_id.
This all worked fine.
Then I came along, and needed some updates.
Another field needed on this "main" table
(I have earlier, added columns to another table, with out issue)
Added column to this "main" table (restrict_to_me)
Now when it tries to save to database - it trys saving "system_id=0".
Linked tables, also make records with system_id=0
In entity framework designer - i can see the field system_id ENTITY_KEY=true and StoredGeneratedPatern=Idenity
So I can not see what I have done to stop somthing from working with the entity framework, except updating the entity framework.
Any direction much appricated
thanks
When you added the new field, did you drop the table and recreate it?
If you did that then you deleted the trigger at the same time. So when you recreate the table, you also need to recreate the trigger.
Try inserting data just using an SQL statement and see if the id is generated.
This was an Entity Framework issue, one many have already had.
Not every time, but some times, when updating the model, StoredGenereatedPattern being droped in a section.
http://www.ladislavmrnka.com/2011/03/the-bug-in-storegeneratedpattern-fixed-in-vs-2010-sp1/
When looking at fixes, did not understand that BOTH SSDL and CSDL parts stored in same text.
So look in upper part that it has StoredGenereated Pattern.
I need an example for populating the dojo grid with the data coming from server. I have struts2 and dojo application in which action class is setting a model variable of type hashmap as the result containing different values that needs to be shown in the form of grid.
Now how can i represent this hashmap in the form of grid data. can you please giving a sample example application which converts the hashmap to json and then uses this json to populate the grid.
I use Jackson to serialize to JSON. Does each item in the map represent a row in the grid? How complex is the data that you are serializing?
https://github.com/FasterXML/jackson-core
If the data structure is simple, then you can probably get away with just using Jackson.
When you want to begin serializing more complex data structures, then you might need to enhance your serialization engine.
I have written some stuff that can do this. Too much to explain here but you can check out these blog posts and see the code on git hub:
http://swingingcode.blogspot.com/2012/04/json-serialization-engine-part-i.html
http://swingingcode.blogspot.com/2012/04/json-serialization-engine-part-ii.html
https://github.com/cswing/evinceframework/tree/master/web/src/java/com/evinceframework/web/dojo/json
I am making a app in Delphi 6 + MySQL database using standard data-aware components and dbExpress. The app allows a users to view records in a grid and edit data (insert and/or delete records) client side. These data edits are then only written to database on clicking the submit button. All of this works fine and has the following setup:
Controls:
1. DBGrid1 linked to a DataSource1 to display data visually.
2. DataSource1 is linked to ClientDataSet1 to offer data for DBGrid to display.
3. ClientDataSet1 is linked to DataSetProvider1 to provide client-side data for editing.
4. DataSetProvider1 is linked SQLDataSet1 which selects records from a single DB table.
5. SQLDataSet1 is linked to SQLConnection to provide connection to MySQL database.
Actions:
1. User inserts a record: I use ClientDataSet1.InsertRecord;
2. User deletes a record: I use ClientDataSet.Delete;
3. User submits data: I use ClientDataSet1.ApplyUpdates(-1);
This all works great in terms of handling data & posting data (with the inclusions of a small hack on DataSetProvider1BeforeUpdateRecord to delete records).
NOW FOR MY PROBLEM:
When the user first loads the form, the DBGrid1 displays all original records, removes all deleted records. But when the user inserts a new record in ClientDataSet1, a blank record is displayed in DBGrid1. The actual data is not lost or set as NULLS as when you ClientDataSet1.ApplyUpdates, this record is correctly written to the DB.
I know TClientDataSet has a data property for original data and a Delta property for edited data. Can these two properties with data by displayed in a single DBGrid at one time & still allowing the user to edit the data?
I have looked at 30+ resources and demo apps & all avoid this issue. Can this be done?
Ok...this question has been viewed a fair amount without much feedback. I did some research by downloading many tutorials, demo apps & read multiple articles/help info discussing the use of these controls.
The net result:
These controls are a bit buggy in general.
In specific reference to my question, it is safe to say the controls cannot do what I describe as a standard.
This is based on the 30+ demo apps, articles and tutorials I reviewed that either don't describe displaying both the original data with Delta data in a single data grid. Sure you could hack this outcome (which is what I did) using a Listbox or StringGrid, but that also indicates the control cannot or not usable at providing this functionality (on the slim chance it might).
This functionality is an obvious oversight in my opinion as a user wants to see the potential outcome of their actions, conveniently in a single data grid AND a developer wants to provide that in a simple & pain free way i.e. using a datagrid to display data!
Question Answered [if you can prove differently with a demo app that I want to review, I will remove this].
If you created a demo app and couldn't get it to work, up vote my answer. Thanks
The TDBGrid control provided with Delphi does not have the built-in functionality to display both the old and new values for fields. You are welcome, of course, to inherit from the Grid or create your own and add the functionality, or buy a third party component that accomplishes what you want. You are not limited to the standard controls, though they do provide the most commonly required functions.
You can also accomplish what you want by using calculated fields. For example, if you have a String field Name, add a new calculated String field to the dataset called OldName, with the same length as Name.
Then in your OnCalcFields event for the dataset, simply enter code like the following:
if DataSet.State = dsEdit then
begin
DataSet.FieldByName('OldName').Value := DataSet.FieldByName('Name').OldValue;
end
else
begin
DataSet.FieldByName('OldName').Value := Null;
end;
TClientDataset will handle itself the correct record status. Changes are logged, but unless you ask it explicity to show some other status (see StatusFilter property), it will show the actual state of a record.
It is possible InsertRecord bypasses some notification mechanism, so the field display is not updated. What if you perform simpy an Insert and the set field values?