We are going to use the same method from the World.cfc that we discussed in our Using ColdFusion to Populate Kendo UI Widgets article. In the below code, the dataTextField represents which column value needs to be displayed in the dropdown and the dataValueField represents value for each text and important one is group parameter to enable the grouping operation based on the column value. Just like the onChange method for the Kendo drop-down list, this method saves the selected values into the cityDropdown hidden form field and enables and refreshes the data in the next city multi-select. Telerik has an example of how to create cascading dropdowns with MultiSelects, however, in my opinion, it is too complex and will suggest a simpler straightforward event-based approach. The model bound to the widget will not be updated. cache: false, // Repopulate the multiselect transport: { However, after creating the logic for this article, I found out that he is using this function for different purposes. var cityButton = $("#cityButton1").data("kendoButton"); If you want to group the city MultiSelect by the states, we need to: To group by the state, the state field must be returned in the JSON. Doing so would disable the city dropdown if you have made a new city selection. cityDropdown.dataSource.read(); If an image is not part of the "Galaxie Blog" open sourced distribution package, and instead is part of a personal blog post or a comment, please contact us and the author of the post or comment to obtain permission if you would like to use a personal image or photograph found on this site. dataType: "json", Copyright 2022 Progress Software Corporation and/or its subsidiaries or affiliates. Does it make sense to say that if someone was hired for an academic position, that means they were the "best"? optionLabel: "Select City", Gregory Alexander either owns the copyright, or has the rights to use, all images and photographs on the site. How many characters/pages could WordStar hold on a typical CP/M machine? We have covered cascading menus with the dropdown lists, but there are fundamental differences. // Get the underlying datasource data. Important: If there are no items, the value method will pre-fetch the data before continue with the value setting. Does squeezing out liquid from shredded potatoes significantly reduce cook time? ---------- 5 Answers Sorted by: 4 You can also assign the array, returned from the value () method, directly to the variable, e.g. rev2022.11.3.43004. contentType: "application/json; charset=utf-8", // Note: when posting json via the request body to a coldfusion page, we must use this content type or we will get a 'IllegalArgumentException' on the ColdFusion processing page. Add the new field to the group argument in the Kendo DataSource. You will need to remove applied filter, before calling value method. You are not limited to grouping the data by the dropdown value or the label- you can use any field in the JSON that is returned by the server. To group data, simply add the field to the JSON from the server and add that field to the Kendo UI group argument in the Kendo data source. if(delimiter == null) delimiter = ','; All Telerik .NET tools and Kendo UI JavaScript components in one package. You face a strange problem when trying to add values to the already selected values. // Note: we are not disabling the city MultiSelect in an else block if there is no data. function onStateDeselect(e) { ----------- How can I select an element with multiple classes in jQuery? // ----------- City Datasource. } // Enable the button Once the comma-separated stateIdList string has been validated, we will query the database with these values using the SQL IN keyword. ----------- See the code below. In a nutshell, this method queries the World, Countries City database and converts the ColdFusion query into a JSON string using our CfJson ColdFusion component. This is fired everytime there is a change to the state datasource // Set a var for the city dropdown list. See Trademarks for appropriate markings. var id = this.value(); You don't need to use grouping in your SQL- the only thing that you need is the JSON string to return the field that you want to group by, add the field that you want to group by, and the Kendo data source will perform the grouping for you. }//..for (var i = 0; i < cityIdList.length; i++) Components / Editors / MultiSelect. What value for LANG should I use for "sort -u correctly handle Chinese characters? To learn more, see our tips on writing great answers. function onCityChange(e){ // Note: in the cascading dropdown example, we are using the select event for the state dropdown to set the option to the default 'Select' placeholder (stateDropdown1.select(0)). Kendo UI UI for jQuery UI for Angular UI for React . // On change function that will enable the next dropdown menu if a value is selected. if (id != '') { This will group the data by the state in the dropdown. // Get the cityId For the dependent multi-select dropdown, we are using different server-side logic in order to query the database allowing multiple choices for cities and countries. We have already introduced this approach in our previous Cascading Country, State and City Kendo UI Dropdowns article and will briefly cover the major details. We are also going to introduce Datasource grouping. // save the selected value in a hidden form var countryDs1 = new kendo.data.DataSource({ } dataTextField: "name", // If the city does not reside in the state that was just deselected, add it to cityIdList array using the JS push method // Refresh the city dropdown }//..if (id != '') { Progress, Telerik, and certain product names used herein are trademarks or registered trademarks of Progress Software Corporation and/or one of its subsidiaries or affiliates in the U.S. and/or other countries. Can I spend multiple charges of my Blood Fury Tattoo at once? var cityStateId = cityData[i].state_id; In this example, even though we are using a MultiSelect here instead of a DropDownList, the Kendo data source of the state dropdown is identical to the DropDownList state data source in our previous article.The only difference here is that in this example, the data-sources change method is used on rare occasions to enable and populate the cities dropdown when there . I have a JSON array in jsonObj(variable name), like for example: Join us on our journey to create the world's most complete HTML 5 UI Framework -. // -------------------------------- Last City MultiSelect. }//read.. The state onChange event is used to fire another function to populate the cities into the next multi-select dropdown. In this example, we will demonstrate how to create cascading menus' with Kendo MultiSelects. type: "POST" Here, we will add grouping to group all of the cities by the chosen states. Instead, when a state is deselected; we need to dynamically recreate the values in the MultiSelect. // Get the selected value -------------------------------- // If there are no states for this country type: "POST" var cityButton = $("#cityButton1").kendoButton({ DevCraft. cityButton.enable(true); // Save the id in a hiden form in order to get at it in the next dropdown This step is completely optional. So here is the API documentation page of MultiSelect - http://docs.kendoui.com/api/web/multiselect. How to set data values on Kendo Multi Select? Saving for retirement starting at 68 years old. // First state dropdown. } How do you remove all the options of a select box and then add one option and select it with jQuery? autoBind: false, Multiplication table with plenty of comments, Math papers where the only issue is that someone else could've done it but didn't. Here is the code: var cityData = cityDropdown.dataSource.data(); Progress is the leading provider of application development and digital experience technologies. // The function allows the url to become dynamic to append additional arguements. // ----------- City MultiSelect. Does a creature have to see to be affected by the Fear spell initially since it is an illusion? // Note: since this template is in a different directory, we can't specify the cfc template without the full path name. by Gregory Alexander
// Get the Kendo button at the end of the interface You need to create a new array! Once the query has been made, the ColdFusion Query Object will be transformed into JSON using the convertCfQuery2JsonStruct method found in the CFJson component. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. We will also briefly cover how to inspect the data coming from the parent dropdown data source and use the JavaScript push method to deselect MultiSelect values chosen by the user as well as using the Kendo DataSource to group city data in the menu. All Telerik .NET tools and Kendo UI JavaScript components in one package. dataSource: stateDs1, var cityDs = cityDropdown.dataSource; Gregory's Approach to handle cascading dropdowns: The first dropdown is a Kendo DropDownList widget; I could have made it a multi-select, but the city list is already quite long even when a unique state is selected. optionLabel: "Select Country", // Refresh the state dropdown $("#selectedCountry1").val(this.value()); autoBind: false, dataValueField: "id", var cityDs = new kendo.data.DataSource({ }//if (! // Check to see if the stateId matches the deselected state when the selected city is found in the datasource (listFind Javascript function: listFind(list, value, delimiter)) In this example, we are passing in the countryId from the country dropdown. The best way to understand what is going on is to interact with the demonstration at the top of this article. Note, using the cityDs variable that we created above won't work- we need to use the full chained name here. The Kendo DataSource takes the values from the hidden selectedState form field and passes the comma-separated list to the getCitiesByStateIdList method. In this example, once a user deselects a state we will call the onStateDeselect function which will be covered later in this article. This must be outside of the transport block This validation step is necessary as the database query will fail if there are empty or non-numeric values. Copyright 2022 Progress Software Corporation and/or its subsidiaries or affiliates. var result = 0; The countryDropdown, stateDropdown, and cityDropdown fields contain the Kendo UI widgets, and the 'View City Details' button at the end of the UI in this example is for visual purposes. read: { The user must select either one or more states. How to add pre-populated Data to kendo-UI components (multi-select, text, etc)? $("#selectedCity1").val(this.value()); This question is locked. if (cityStateId != deselectedStateId){ This entry was posted on October 13, 2022 at 12:29 AM and has received 109 views. Don't worry about the details of this code yet- we are going to cover this in detail in our next article- just note what the purpose of this code is. read: { //Testing carriage: alert('cityStateId:' + cityStateId + ' deselectedStateId:' + deselectedStateId); }).data("kendoButton"); },//transport.., var dataItem = e.dataItem; var countryDropdown1 = $("#countryDropdown1").kendoDropDownList({ Here, we need to use the deselect event to determine if any cities should be removed if the user deselects a given state. type: "POST" We are not using the Kendo DropDownList's select argument to set the default value of the Kendo MultiSelect when changes are made to the parent dropdowns. filter: "contains", Initialize the dropdowns as you normally would- but add an onChange method. It was working most of the time. In this example, even though we are using a MultiSelect here instead of a DropDownList, the Kendo data source of the state dropdown is identical to the DropDownList state data source in our previous article. We are also grouping the data by the state name using group: { field: "state" }. // ------------ onDeselect Event ------------ all kendo controls have a rich client side API. // Save the selected value in a hidden form I did not want to have a scenario where cities are shown for multiple states and multiple countries. If you don't want the complexity of this code you can simply remove the cities whenever something is deselected by keeping the cities in the list or by setting the values of the multi-select to null. template: '
#: data.name #', stateDropdown1.dataSource.read(); function onCountryChange1(e){ Here we are sending both the countryId and the stateId. });//..cityDs.fetch(function(){ The value to set. This could affect MVVM value binding. We are also calling functions via two MultiSelect events- the change event, which we have already covered, and a new deselect event that is specific to the Kendo MultiSelect. To perform this cleanup, we are going to use JavaScript to inspect the data coming back from the server and dynamically re-populate the Kendo MultiSelect. The city onChange method simply saves the selected cities into the selectedCity hidden form and enables the button at the bottom of the UI once a selection has been made. The State Kendo DataSource. // Create the last button. This will only fire when there is no data in the Kendo datasource and will enable the city dropdown in order for the user to still be able to pick a city. url: function() { return "/blog/demo/WorldCountries.cfc?method=getCitiesByStateIdListGroupByState&stateIdList=" + $('#selectedState1').val(); }, In this article you can see how to use the value method of the Kendo UI MultiSelect. group: { field: "state" } Who would I do that? // create MultiSelect from select HTML element var required = $ ("#required").kendoMultiSelect ().data ("kendoMultiSelect"); Now in order to set the selected values for the select box, you just have to use the value () method. // If the user selected a value, enable and refresh the next dropdown list change: onCountryChange1, transport: { How do you set the data values in Java Script? } Add the state name column to the ColdFusion query that generates the JSON. filter: "contains", }, // Use the Javascript push method to push the city into our cityIdList array that we will use to repopulate the MultiSelect. // The function allows the url to become dynamic to append additional arguements. if (!data.length){ http://docs.kendoui.com/api/web/multiselect, docs.telerik.com/kendo-ui/api/web/multiselect#methods-value, Making location easier for developers with new data primitives, Stop requiring only one assertion per unit test: Multiple assertions are fine, Mobile app infrastructure being decommissioned. Here is the code: To set single value: required.value ("Laura Fuller") To set multiple value: Should we burninate the [variations] tag?
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