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Select All items after data is read

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MultiSelect
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Lee
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Lee asked on 08 Apr 2016, 01:57 AM

Trying to figure out how to select all items in a multiselect after reading the data.

@(Html.Kendo().MultiSelect()
.Name("Benchmarks")
.DataValueField("ID")
.DataTextField("BenchmarkName")
.Events(e => e.DataBound("selectAllBenchmarks"))
.DataSource(source =>
{
source.Read(read =>
{
read.Action("GetBenchmarksForPeriodOfEntry", "Reporting")
.Data("filterPeriodOfEntry");
});
})
.AutoClose(true)
.HtmlAttributes(new { style = "width: 240px" })
)

my "selectAllBenchmark" function fires but then I don't know how to loop through the datasource and select each item in the datasource.

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Adrien
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answered on 08 Apr 2016, 07:26 AM

Hi Lee,

I think you will find your answer here http://www.telerik.com/forums/multi-select-select-all

with something like

var all = $.map(multiselect.dataSource.data(), function(dataItem) {
  return dataItem.value;
});
 
multiselect.value(all);

 

Bye !

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Lee
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answered on 08 Apr 2016, 12:54 PM

Yeah I saw this article and tried to implement.  Either my javascript/jquery is weak or  there is something I'm missing about this dataSource structure.  So my routine looks like this:

function selectAllBenchmarks()
{
var multiselect = $("#Benchmarks").data("kendoMultiSelect");
//multiselect.wrapper.find(".k-multiselect-wrap").removeClass("floatWrap").addClass("k-floatwrap");
var all = $.map(multiselect.dataSource.data(), function (dataItem) {
return dataItem.value;
});
multiselect.value(all);
}

I'm calling it on the dataBound event and I've stepped through it.  It hits the map line and then skips down to the multiselect.value(all) as if the multiselect.dataSource.data() is empty but there are 6 items in my multiselect afterward.  Am I calling it on the wrong event or am I setting my multiselect incorrectly?

 

Thanks for help

Lee

0
Nencho
Telerik team
answered on 11 Apr 2016, 10:42 AM
Hello Lee,

You are on the right direction in order to achieve the desired funcitonality. However, as I can see you have set ID as DataValueField for your MultiSelect, which is why, you need to access this field from the dataItem. Please consider the following implementation:

function selectAllBenchmarks()
{
var multiselect = $("#Benchmarks").data("kendoMultiSelect");
//multiselect.wrapper.find(".k-multiselect-wrap").removeClass("floatWrap").addClass("k-floatwrap");
var all = $.map(multiselect.dataSource.data(), function (dataItem) {
return dataItem.ID;
});
multiselect.value(all);
}



Regards,
Nencho
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Lee
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answered on 11 Apr 2016, 01:07 PM
That got it!  Thank you so much.
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mth developer
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answered on 27 Apr 2016, 05:27 AM

Hello guys,

i ran into the same problem, so i'll post it into this thread. I've created a Kendo Multiselect like this:

                @(Html.Kendo().MultiSelect()
                    .Name("multiselect")
                    .DataSource(source =>
                    {
                        source.Read(read =>
                        {
                            read.Action("LoadFilialen", "PEP").Data("returnfirmavalue");
                        })
                        .ServerFiltering(true);
                    })
                    .DataTextField("filiale")
                    .DataValueField("id")
                    .AutoBind(true)
                    .AutoClose(false)                        
                )

And now my goal would be to select all items of the multiselect by clicking on a simple button:

        $('#selectAllButton').click(function () {
           
            var multiselect = $('#multiselect').data("kendoMultiSelect");

            var all = $.map(multiselect.dataSource.data(), function (dataItem) {
                return dataItem.ID;
            });
            multiselect.value(all);

        });

It seems like the event fires, but the result isn't correct. The debugger shows me, that the variable "all" is empty, or has a Length of 0. What's happening next is that the multiselect loses all of the already selected items, because it gets the empty variable assigned.

 

Any help is really appreciated!

Best Regards,

Daniel

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Lee
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answered on 27 Apr 2016, 12:46 PM
It looks as though your DataValueField("id") that you would need to change the "return dataItem.ID;" to return dataItem.id;
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mth developer
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answered on 27 Apr 2016, 01:23 PM

Wow! I'm really speechless right now. After hours and hours of searching your suggestion was the solution.

Thank you so much Lee!

Regards, Daniel

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Lee
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Adrien
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