Boolean value in Datagrid shown as checkbox

Radzen IDE (Angular)
1

Hello All
I currenly have a datagrid created from a SQL db table that contains a boolean\bit field. When I run the page the field is shown as true\false which is ok, however, how can i change this so it shows as a checkbox so the user can check\uncheck the box and that result then saved back to the database.

Thanks
Otis

2

Ok, I am a step closer. I should’ve been more confident in my playing around :slight_smile:
By entering the below code into the template column that i am looking to be a checkbox I get the box. Yay!
However, when you click on one checkbox all check boxes are selected. Also I havent worked out how to set the state of the checkbox yet.

<rz-checkbox #checkbox${data.id} [(ngModel)]=“isChecked” value="${data.ReverseSign}" name=“checkbox${data.id}”>

3

Hi Otis,

All checkboxes are selected because they are all data-bound to the same property - isChecked.

There is an easier way to implement what you need without writing any code.

  1. Edit the Template of that column via the template designer - click the "edit" icon (which is the last one).
  2. Drag and drop a Checkbox component from the toolbox. Set its Value property to ${data.BooleanProperty} where BooleanProperty is the name of your boolean column.
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    Screen Shot 2018-10-19 at 15.07.09.png3846Ă—1972 337 KB
  3. Handle the Change event of the Checkbox component and execute the updateXXX data source method which will update your entity with the new value.
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    Screen Shot 2018-10-19 at 15.20.46.png3844Ă—1976 405 KB

Then just exit the template designer by clicking the "End template editing" button in the top left corner.

I am attaching a working application which you can import in Radzen.checkbox-column.zip (8.4 KB)

1 Like
4

Oh. My. God! :exploding_head::exploding_head::exploding_head:I am speechless! That is actually easier than i expected and now i know what that icon does.
Feeling a little foolish but very pleased that it is solved. Thank you so much.

5

This seems to only work, the first time the checkbox is selected / clicked.

subsequent selections of the check box fails with "Update Failed".

This is the behavior of the "checkbox-column" working application.

I followed the "Checkbox-Column" example to add a checkbox to my data grid. and it works but only the first time.

the first time I select the check box, the Boolean value is successfully altered. however selecting the checkbox any number of times thereafter fails. "Update Failed"

your help is appreciated.
michael

6

If the database field is non nullable, make sure the CheckBox is not tri-state - otherwise it will try to save null in the database and will fail.

7

@enchev,

In my application the checkbox is NOT tri-state and nulls are allowed for this field.

in the Radzen example "checkbox-column" the checkbox is not tri-state. and it has this issue.

the failure occurs when attempting to update to True or False.

michael

8

@enchev,
Correction. I am no longer seeing the issue using the "Checkbox-Column" application.

I notice that on the failed update attempts an additional request payload parameter is being sent.

@odata.context: "https://techneauxapidev.azurewebsites.net/odata/TechneauxDB/$metadata#Times/$entity"

this is not included in a successful attempt.

I can send a further information from Chrome's Dev tools if that will help.

thanks,
michael